{"id":8379,"date":"2025-12-15T19:57:35","date_gmt":"2025-12-15T22:57:35","guid":{"rendered":"https:\/\/vinq.us\/?p=8379"},"modified":"2026-01-03T20:08:58","modified_gmt":"2026-01-03T23:08:58","slug":"pilhas-esteril-encostas-licoes-casos-internacionais","status":"publish","type":"post","link":"https:\/\/vinq.us\/en\/pilhas-esteril-encostas-licoes-casos-internacionais\/","title":{"rendered":"Designing Waste Rock Piles on Slopes: Lessons from Recent International Cases"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"8379\" class=\"elementor elementor-8379\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4eecce4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4eecce4\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-756fa15\" data-id=\"756fa15\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f6b87b9 elementor-widget elementor-widget-text-editor\" data-id=\"f6b87b9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><b> The context of waste rock piles on slopes<\/b><\/h2><p><span style=\"font-weight: 400;\">In the world&#039;s major mining districts, the design configuration has changed structurally. The combination of reduced availability of flat areas near the pits, increasing volumes of waste rock, stricter regulatory requirements, and greater pressure from... <\/span><i><span style=\"font-weight: 400;\">stakeholders<\/span><\/i><span style=\"font-weight: 400;\"> The reduction in impacted area leads to a common denominator. Waste rock piles migrate to slopes and narrow valleys, often representing environments with rugged terrain and harsh climates.<\/span><\/p><p><span style=\"font-weight: 400;\">In this scenario, tailings piles cease to be seen as mere auxiliary deposits and begin to behave, from a risk perspective, as critical geotechnical assets. The structures become taller, more complex in geometry, more dependent on foundation conditions and hydrological regimes, and more sensitive to operational variations over time. In practical terms, the level of complexity approaches that associated with dams, even though the legal framework does not always reflect this reality.<\/span><\/p><p><span style=\"font-weight: 400;\">Recent international experience demonstrates that the traditional paradigm of \u201c<\/span><i><span style=\"font-weight: 400;\">stack considering angle of repose<\/span><\/i><span style=\"font-weight: 400;\">&quot;This is inadequate for this new context. In tall piles supported on slopes, long-term performance is controlled by three main factors:&quot;\u00a0<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">the quality of the foundation&#039;s understanding;<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">water management; and,<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The rigor in geometry and in the constructive sequence.\u00a0<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">When these three vectors are not treated with the same discipline applied to structures with greater regulatory visibility, the organization tends to operate with a greater sense of security than the actual margin of security.<\/span><\/p><p><span style=\"font-weight: 400;\">From a portfolio risk management perspective, this means that tailings piles on slopes are no longer a \u201c<\/span><i><span style=\"font-weight: 400;\">second-tier operational risk<\/span><\/i><span style=\"font-weight: 400;\">&quot;and have become part of the set of issues that directly influence business continuity, the social license to operate, and the allocation of long-term capital.&quot;<\/span><\/p><p>\u00a0<\/p><h2><b>What international cases show in practice<\/b><\/h2><h3><b>Tall piles in narrow valleys and exhausted pits.<\/b><\/h3><p><span style=\"font-weight: 400;\">In copper, gold, and coal mines in Andean, Balkan, and Asian environments, a recurring pattern is observed. As the pit deepens and the volume of overburden increases, disposal solutions converge on filling exhausted pits and narrow valleys, often with the formation of high embankments supported on sloping hillsides.<\/span><\/p><p><span style=\"font-weight: 400;\">These solutions offer significant benefits. They reduce the increase in <\/span><i><span style=\"font-weight: 400;\">footprint<\/span><\/i><span style=\"font-weight: 400;\">These methods minimize the need for newly licensed areas, take advantage of existing infrastructure, and can optimize transport distances. On the other hand, they introduce more complex instability mechanisms, with potential failure surfaces that simultaneously involve volumes of the pile and significant portions of the foundation, amplification of stresses at the toe of the slope, and a strong dependence on the performance of base drainage and upstream water interception systems.<\/span><\/p><p><span style=\"font-weight: 400;\">When analyzing cases of good performance over decades, some elements are repeated. The geological-geotechnical model of the foundation is three-dimensional, consistent, and supported by in-depth investigation. Material strength parameters are calibrated through back-analysis and robust testing. The pile geometry is conducted within clear design envelopes, with controlled bench heights, functional berm dimensions, and rise rates compatible with drainage. Internal drainage is treated as a critical system, with redundancy, planned maintenance, and monitoring.<\/span><\/p><p><span style=\"font-weight: 400;\">In problematic cases, the pattern is the opposite. Foundation poorly investigated, parameters \u201c<\/span><i><span style=\"font-weight: 400;\">typical<\/span><\/i><span style=\"font-weight: 400;\">&quot;Or borrowed from other assets, drainage systems that do not address extreme rainfall scenarios, lack of a binding geometric envelope, and reactive monitoring, restricted to visual inspections or poorly representative instruments. The result, in many of these assets, is not an immediate event, but a silent accumulation of deformations and latent risks over years.&quot;<\/span><\/p><h3><b>Humid climates, intense weathering, and fragile foundations<\/b><\/h3><p><span style=\"font-weight: 400;\">In humid tropical and subtropical contexts, such as Brazil, West Africa, and Southeast Asia, the challenge is amplified by geology and climate. Waste rock piles on slopes often rest on thick and complex residual soils, heterogeneous colluvium, highly weathered rocks, soft or collapsible clay horizons, strong permeability contrasts, and shallow, dynamic water tables.<\/span><\/p><p><span style=\"font-weight: 400;\">Under these conditions, the risk is not solely a function of the pile height or slope angle. Overall stability then depends on the interaction between the mass of overburden, which changes over the years, the partially saturated foundation, which responds to cycles of saturation and drying, and the three-dimensional flow of water in the rock mass and slope, strongly influenced by extreme rainfall events.<\/span><\/p><p><span style=\"font-weight: 400;\">The lesson that emerges from these environments is clear. In piles implanted on humid slopes, the simple two-dimensional approach, with a single water level scenario and a fixed set of resistance parameters, tends to produce biased, artificial, and optimistic responses. Robust practice requires integrating hydrogeology, weathering, temporal variation of properties, and geometry evolution within a single analytical framework.<\/span><\/p><p>\u00a0<\/p><h2><b>What changes when the stack is supported on an inclined base?<\/b><\/h2><h3><b>Redistribution of stresses along the slope<\/b><\/h3><p><span style=\"font-weight: 400;\">On roughly horizontal bases, the weight of the pile generates a stress field dominated by vertical components and shear forces distributed in a simpler way. On inclined bases, a significant portion of the load becomes a component along the slope, which acts directly as a driving force for sliding mechanisms.<\/span><\/p><p><span style=\"font-weight: 400;\">This configuration makes downstream dipping discontinuities, colluvium-rock contacts, structured residual horizons, old fracture planes, and past rupture surfaces particularly sensitive. In tall piles, the increase in normal and shear stress at the pile\/foundation interface is significant, and any underestimation of resistance, especially under saturated conditions, can translate into an abrupt drop in the safety margin.<\/span><\/p><p><span style=\"font-weight: 400;\">The practical consequence is: Models that treat the foundation as a homogeneous and horizontal stratum, with unique average parameters, are not compatible with the degree of risk associated with very high piles on slopes. The verification needs to include deep surfaces that run along the interface between foundation materials, as well as mechanisms involving significant volumes of rock and soil under the pile.<\/span><\/p><h3><b>Hydrogeology on slopes and the role of water.<\/b><\/h3><p><span style=\"font-weight: 400;\">Sloping topography organizes groundwater flow and surface drainage in a concentrated manner. Flow lines converge on specific zones, often at interfaces between materials of different permeabilities, in relief folds, or next to geological structures. When a pile is added to this slope, the natural system is reconfigured. The pile generates its own recharge, alters the stress path, and can act as a partial barrier to flow, creating locally intense gradients.<\/span><\/p><p><span style=\"font-weight: 400;\">Projects aligned with best practices treat water management as a central axis of the concept. Base and interceptor drainage are sized based on extreme rainfall scenarios, include explicit safety margins, and consider the degradation of drainage materials throughout their lifespan. The contribution of water is quantified, not just intuitively assumed. The system&#039;s response to critical events is evaluated in transient regimes, not just in idealized steady-state regimes.<\/span><\/p><p><span style=\"font-weight: 400;\">Conversely, projects that assume a &quot;fixed&quot; water level within the tailings dam, detached from the hydrogeology of the slope, tend to ignore the combined effect of heavy rainfall, maintenance failures, drain obstruction, and changes in the tailings dam surface over time. The calculated safety margin then reflects the theoretical scenario more than the actual behavior of the system.<\/span><\/p><h3><b>Three-dimensional geometry and compound mechanisms<\/b><\/h3><p><span style=\"font-weight: 400;\">Few piles on slopes, in practice, have a cross-section \u201c<\/span><i><span style=\"font-weight: 400;\">clean<\/span><\/i><span style=\"font-weight: 400;\">&quot;and regular. Drainage channels, ridges, recesses, the presence of adjacent trenches, local changes in height, and variations in the construction sequence create a highly three-dimensional, effective geometry.&quot;<\/span><\/p><p><span style=\"font-weight: 400;\">Under these conditions, instability mechanisms involve asymmetrical volumes, rupture paths that bypass ridges or exploit specific discontinuities, and combinations of translational and rotational landslides and mechanisms of toppling or localized relief. In narrow valleys with progressive filling, lateral confinement can increase or decrease safety margins, depending on the configuration, something that a purely two-dimensional model does not adequately capture.<\/span><\/p><p><span style=\"font-weight: 400;\">Therefore, in tall piles supported on complex slopes, three-dimensional analyses cease to be an optional tool and become an essential component of risk understanding. It&#039;s not about completely replacing two-dimensional analyses, but about recognizing their limitations and using them as part of an integrated set of tools, not as the final answer.<\/span><\/p><p>\u00a0<\/p><h2><b>Stability conditions, where the risk is truly concentrated.<\/b><\/h2><h3><b>Foundation: From design detail to primary risk driver<\/b><\/h3><p><span style=\"font-weight: 400;\">When examining retrospective cases of significant deformation or failure in waste rock piles on slopes, the foundation recurrently appears as a determining factor. Thick residual soils, colluvium with clay lenses, fractured rocks with unfavorable dip, old shear zones, and soil\/rock interfaces with low residual strength create situations where the pile only reveals a pre-existing weakness of the slope.<\/span><\/p><p><span style=\"font-weight: 400;\">Projects that stand out for their robustness share some principles. The geological and geotechnical model is built in three dimensions, combining detailed mapping, deep boreholes, field and laboratory tests, selective geophysics, and the systematic use of back analyses to calibrate parameters. Strength values explicitly consider peak, post-peak, and residual conditions, especially in materials with brittle fracture or saturation-sensitive behavior.<\/span><\/p><p><span style=\"font-weight: 400;\">On the other hand, foundations treated as \u201c<\/span><i><span style=\"font-weight: 400;\">black box<\/span><\/i><span style=\"font-weight: 400;\">&quot;Designs with limited data, shallow sampling depth, lack of discontinuity characterization, and parameters borrowed from other assets tend to result in projects that only function as long as operating conditions remain within a narrow range. Any deviation in geometry, water regime, or loading opens the door to unexpected responses.&quot;<\/span><\/p><h3><b>Sterile as an engineering material, and not just &quot;leftover&quot;<\/b><\/h3><p><span style=\"font-weight: 400;\">Studies in large-scale stockpiles show that overburden exhibits behavior far from a uniform material. The particle size distribution is wide, segregation between blocks and fine fraction is significant, particle degradation under high stress generates additional fines over time, density varies depending on the disposal method and loading history, and the overall drained frictional behavior is sensitive to saturation, confinement level, and fines content.<\/span><\/p><p><span style=\"font-weight: 400;\">In high piles, this reality implies that a single, fixed set of strength parameters is not technically defensible. Reference designs utilize tests on large-volume samples and systematic density monitoring. <\/span><i><span style=\"font-weight: 400;\">in situ<\/span><\/i><span style=\"font-weight: 400;\">, back-analyses of instrumented sections, models that incorporate parameter variation with depth and stress level, and sensitivity analyses that explicitly show the impact of parametric uncertainty on the safety factor or reliability index.<\/span><\/p><p><span style=\"font-weight: 400;\">Treating waste rock as an engineering material, with properties that can be managed and improved over time, changes the decision-making agenda. Disposal methods, traffic compaction criteria, moisture control, and segregation become design variables, not just details of daily operation.<\/span><\/p><h3><b>Geometry, constructive sequence and layout technology<\/b><\/h3><p><span style=\"font-weight: 400;\">Final height, overall slope, bench height, berm width, existence and dimensioning of reinforcements, and stockpile advance pattern determine how stresses, strains, and pore pressures are distributed throughout the life cycle.<\/span><\/p><p><span style=\"font-weight: 400;\">Operations with a consistent history of good performance tend to operate within clear geometric envelopes. Each advance is checked against the envelope, and any deviations trigger corrective actions. The actual geometry is monitored by topography, LiDAR, or drones with adequate resolution, and the information is integrated into databases that communicate with geotechnical models.<\/span><\/p><p><span style=\"font-weight: 400;\">The disposal technology is chosen consciously. Conveyor belt systems, truck and tractor fleets, and the use of dedicated compaction generate distinct internal arrangements in the pile, in terms of block orientation, void connectivity, and fines distribution. Mature designs explicitly address these differences and incorporate their implications into the stability assessment.<\/span><\/p><h3><b>Water as a risk amplifier and decision driver.<\/b><\/h3><p><span style=\"font-weight: 400;\">Water remains the primary risk amplifier in tailings piles on slopes. This is due not only to the increase in pore pressure and reduction in effective stress, but also to the indirect effects it introduces. Surface and internal erosion, drainage obstruction, clogging of granular materials, mobilization of fines, chemical and physical alteration of fine matrices, and the development of preferential flow paths are phenomena that tend to intensify over time.<\/span><\/p><p><span style=\"font-weight: 400;\">Projects aligned with best practices include, from the outset, drainage systems designed for extreme events, with redundancy and an explicit maintenance plan. Water management is treated as part of the geotechnical design, and not just as an environmental issue. Flood and saturation scenarios are analyzed in an integrated manner, combining hydraulic simulations, flow models in porous media, and stability analyses for different loading conditions.<\/span><\/p><p>\u00a0<\/p><h2><b>Analytical tools, from single-factor to performance envelope.<\/b><\/h2><p><span style=\"font-weight: 400;\">Recent developments in high-pile designs on slopes are shifting the focus from a single nominal safety factor to a performance envelope that combines different analytical tools.<\/span><\/p><p><span style=\"font-weight: 400;\">In practice, this means integrating limit equilibrium analyses in two and three dimensions, covering shallow, deep, and composite mechanisms. Numerical deformation models, such as finite elements or finite differences, are used to understand stress redistribution, deformation evolution, and pile-foundation interaction. Seismic analyses are conducted in a manner compatible with regional seismicity, either through calibrated pseudostatic approaches or through dynamic analyses in structures of greater consequence. Sensitivity studies and, whenever possible, probabilistic analyses allow quantifying the influence of parametric uncertainty on predicted performance.<\/span><\/p><p><span style=\"font-weight: 400;\">In high piles on slopes, three elements appear recurrently in reference approaches: Explicit representation of weak interfaces and foundation stratigraphy; careful modeling of the water regime, including partial degradation of drainage and extreme rainfall scenarios; and consideration of three-dimensional geometry in valleys and gullies, avoiding transposing results from two-dimensional models to clearly three-dimensional situations.<\/span><\/p><p>\u00a0<\/p><h2><b>Operation, monitoring and governance: where the project becomes reality.<\/b><\/h2><p><span style=\"font-weight: 400;\">No numerical model can compensate for uncontrolled operation. In tailings piles on slopes, this statement is even more true, as the geometric margin is reduced and the instability mechanisms are sensitive to relatively small variations in height, drainage, and disposal pattern.<\/span><\/p><p><span style=\"font-weight: 400;\">Consistent monitoring programs combine different layers. Continuous geometric control through surveying, LiDAR, or drones. Displacement monitoring using surface markers, InSAR, and, in critical sectors, slope monitoring radars. Internal instrumentation, with piezometers, inclinometers, and settlement markers located in regions of greater geotechnical or hydrogeological uncertainty. Structured inspection routines for drainage systems, channels, ditches, berms, and slopes, associated with objective maintenance and rehabilitation criteria.<\/span><\/p><p><span style=\"font-weight: 400;\">From a governance perspective, the international trend is towards convergence between high-consequence tailings piles and traditionally regulated structures. Consequence classification, recurring technical committees, independent audits, action plans derived from audit findings, periodic review of models and parameters, and integration between geotechnical teams, operations, environment, and corporate risk management are elements that tend to differentiate reactive operations from operations that effectively generate risk throughout the lifecycle.<\/span><\/p><p>\u00a0<\/p><h2><b>Life cycle perspective<\/b><\/h2><p><span style=\"font-weight: 400;\">Waste rock piles on slopes present a risk horizon that transcends the disposal phase. Long-term deformations can continue to evolve for years after the operation ends. Physical and chemical weathering processes alter resistance and permeability parameters. Future interventions, such as road construction, industrial development, installation of solar parks, or use of the area as a platform for other activities, can modify the stress state and drainage.<\/span><\/p><p><span style=\"font-weight: 400;\">An approach aligned with the life cycle concept requires that the design of a hillside pile from the outset with closure in mind. Final geometry, long-term drainage systems, cover and revegetation solutions, compatibility with the overall stability of the slope, and future land use scenarios must be addressed from the initial design phases. In mountainous environments, pile closure is ultimately a regional-scale slope stability issue with implications for safety, the environment, and the landscape.<\/span><\/p><p>\u00a0<\/p><h2><b>Implications for Brazilian operations and the role of a full-cycle consultancy.<\/b><\/h2><p><span style=\"font-weight: 400;\">For operations in rugged terrain in Brazil, the lessons from international cases are straightforward. Waste rock piles on slopes, with considerable height and limited space, need to be treated as critical geotechnical assets, with rigor comparable to that applied to high-consequence tailings dams.<\/span><\/p><p><span style=\"font-weight: 400;\">This implies five concrete changes in approach. First, recognizing the foundation as the main risk driver and investing in the construction of a solid, data-supported three-dimensional geological and geotechnical model. Second, treating waste rock as an engineering material, incorporating variability and the evolution of properties over time. Third, disciplining geometry and construction sequence with acceptance criteria linked to operational reality. Fourth, explicitly modeling the water regime and dimensioning drainage systems for extreme events and for a horizon of decades. Fifth, migrating from a single safety factor to performance evaluation, supported by two- and three-dimensional analyses, deformation models, and sensitivity studies.<\/span><\/p><p><span style=\"font-weight: 400;\">The role of a specialized mining geotechnical and risk management consultancy is to connect this global technical framework to the specific context of each asset. This means translating international expertise into concrete design, operation, and governance decisions, tailored to the client&#039;s geology, climate, regulations, and business strategy.<\/span><\/p><p><span style=\"font-weight: 400;\">In waste rock piles on slopes, the real difference lies not only in the ability to calculate safety factors, but in helping the organization move away from the logic of &quot;<\/span><i><span style=\"font-weight: 400;\">It&#039;s always worked this way.<\/span><\/i><span style=\"font-weight: 400;\">&quot;and migrate to a model in which the stack is a known structure, monitored and managed throughout its entire life cycle, with transparent, data-driven decisions aligned with responsibility towards people, the environment and invested capital.&quot;<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-bf09a2f e-flex e-con-boxed e-con e-parent\" data-id=\"bf09a2f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c37aec1 elementor-widget elementor-widget-text-editor\" data-id=\"c37aec1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Authors:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-839ddff e-con-full e-flex e-con e-child\" data-id=\"839ddff\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-d2b5c52 e-con-full e-flex e-con e-child\" data-id=\"d2b5c52\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-86022da e-con-full e-flex e-con e-child\" data-id=\"86022da\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-424d322 e-con-full e-flex e-con e-child\" data-id=\"424d322\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-292199d elementor-widget elementor-widget-image\" data-id=\"292199d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"780\" height=\"780\" src=\"data:image\/svg+xml;charset=utf-8,%3Csvg xmlns%3D&#039;http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg&#039; viewBox%3D&#039;0 0 800 800&#039;%2F%3E\" class=\"attachment-large size-large wp-image-8097 ld-lazyload\" alt=\"\" data-src=\"https:\/\/vinq.us\/wp-content\/uploads\/2025\/09\/1693149511320.jpeg\" data-srcset=\"https:\/\/vinq.us\/wp-content\/uploads\/2025\/09\/1693149511320.jpeg 800w, https:\/\/vinq.us\/wp-content\/uploads\/2025\/09\/1693149511320-300x300.jpeg 300w, https:\/\/vinq.us\/wp-content\/uploads\/2025\/09\/1693149511320-150x150.jpeg 150w, https:\/\/vinq.us\/wp-content\/uploads\/2025\/09\/1693149511320-12x12.jpeg 12w, https:\/\/vinq.us\/wp-content\/uploads\/2025\/09\/1693149511320-320x320.jpeg 320w, https:\/\/vinq.us\/wp-content\/uploads\/2025\/09\/1693149511320-760x760.jpeg 760w\" data-sizes=\"(max-width: 780px) 100vw, 780px\" data-aspect=\"1\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ef21ab0 e-con-full e-flex e-con e-child\" data-id=\"ef21ab0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-204f8fc elementor-widget elementor-widget-heading\" data-id=\"204f8fc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">John Paul dos Santos<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5b8b872 elementor-widget elementor-widget-text-editor\" data-id=\"5b8b872\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Bachelor in Mining Engineering (UFMG), Master in Civil Engineering and Management (University of Glasgow), Specialist in Geotechnical Engineering and Project Management.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8fe75be elementor-widget elementor-widget-text-editor\" data-id=\"8fe75be\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Mining Engineer specializing in geotechnics and project management, an international reference in dams and geotechnical structures applied to mining.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d089420 elementor-align-left elementor-widget elementor-widget-button\" data-id=\"d089420\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"http:\/\/www.linkedin.com\/in\/joaopaulodossantos\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fab-linkedin\" viewbox=\"0 0 448 512\" 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e-con e-child\" data-id=\"1ca2bb8\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-8c3ec13 e-con-full e-flex e-con e-child\" data-id=\"8c3ec13\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f0be7ac elementor-widget elementor-widget-image\" data-id=\"f0be7ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"780\" height=\"780\" src=\"data:image\/svg+xml;charset=utf-8,%3Csvg xmlns%3D&#039;http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg&#039; viewBox%3D&#039;0 0 800 800&#039;%2F%3E\" class=\"attachment-large size-large wp-image-8089 ld-lazyload\" alt=\"\" data-src=\"https:\/\/vinq.us\/wp-content\/uploads\/2025\/09\/1558569675415.jpeg\" 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data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Leandro Azevedo da Silva<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eca30e1 elementor-widget elementor-widget-text-editor\" data-id=\"eca30e1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Bachelor in Geology (UFRRJ), Master in Mining Engineering (UFMG) and Specialist in Mineral Resources Engineering.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d3f11a8 elementor-widget elementor-widget-text-editor\" data-id=\"d3f11a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A geologist with nearly 20 years of experience in geotechnics, he leads technical projects at VINQ, combining innovation and safety in mining solutions.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cab687e elementor-align-left elementor-widget elementor-widget-button\" data-id=\"cab687e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"http:\/\/www.linkedin.com\/in\/leandro-azevedo-da-silva-5736a8139\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fab-linkedin\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 32H31.9C14.3 32 0 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risk.<\/p>","protected":false},"author":3,"featured_media":8337,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[20,25],"tags":[],"class_list":["post-8379","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geotecnia","category-projetos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Projetar Pilhas De Est\u00e9ril Em Encostas, Li\u00e7\u00f5es Dos Casos Internacionais Recentes - VinQ \u00b7 Geotecnia<\/title>\n<meta name=\"description\" content=\"Li\u00e7\u00f5es de casos internacionais sobre projeto e gest\u00e3o de pilhas de est\u00e9ril em encostas e seus impactos no risco geot\u00e9cnico.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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