华西露天矿首采区非工作帮边坡稳定性分析与评价
发布时间：2019-01-04 21:01
【摘要】：露天矿边坡的稳定性探究是露天矿山设计中不可或缺的一部分，同时它亦然是当代矿山经济安全探究的要点及难点。由于露天矿山工程的开展，采掘规模的持续扩大和延伸，露天矿边坡的失稳现象变得日益严峻，边坡的稳定性已经是矿山生产及经济效益提高的重要因素。 本论文以华西露天矿首采区非工作帮边坡为依托，由于该区内上覆岩层被第四系风积沙所覆盖，表层黄土节理发育，易形成裂缝甚至可致圆弧形滑坡，并且区内地层主要以砾岩、砂砾岩为主，在加上雨季来临时，受水的影响，边坡弱化现象严重，边坡是典型的软岩边坡，边坡不稳定现象时有发生。目前华西露天矿正处于首采区剥采阶段，随着采掘进度的推进，非工作帮暴露时间过长，风化作用严重，故急需对其非工作帮边坡进行稳定性分析与评价。 本论文通过理论分析、岩土试验、极限平衡法、数值模拟及与实际结合的研究方法对华西露天矿非工作帮边坡展开分析与评价，以华西露天矿水文地质资料为基础，经过现场调研和物理力学试验全面掌握非工作帮边坡的地质情况及岩土体的物理力学特性，为边坡的稳定性分析与评价奠定数据基础。运用GEO-SLOPE软件中的Bishop法、简步法、Spencer法等多种方法对其非工作帮边坡进行稳定性分析与评价。同时运用FLAC3D软件对非工作帮进行数值模拟，通过分析边坡内应力、位移、切应变率和切应变量等情况，，得出边坡处于相对稳定状态，潜在危险区域主要集中在9煤层及9煤层以上表土台阶以下的局部区域，进而验证了极限平衡理论的准确性，同时结合现场实际采掘情况，提出相应的边坡防滑和治理方案，以确保露天煤矿正常推进和安全生产。
[Abstract]:The study of slope stability in open-pit mines is an indispensable part in the design of open-pit mines, and it is also the key point and difficulty in the exploration of economic safety in contemporary mines. Due to the development of open-pit mine engineering and the continuous expansion and extension of mining scale, the instability of open-pit slope becomes increasingly severe, and the stability of slope has become an important factor in mine production and economic efficiency improvement. This paper is based on the non-working slope in the first mining area of West China Open-pit Mine. Because the overlying strata in this area are covered by the quaternary aeolian sand, the surface loess joints are developed, and the cracks can even cause the circular arc landslide. The strata in this area are mainly composed of conglomerate and sandy gravel. When the rainy season comes, the slope weakening phenomenon is serious, the slope is a typical soft rock slope, and the slope instability occurs from time to time. At present, West China Open-pit Mine is in the stage of stripping mining in the first mining area. With the advance of mining progress, the exposure time of non-working slope is too long and the weathering effect is serious, so it is urgent to analyze and evaluate the stability of its non-working slope. Through theoretical analysis, geotechnical test, limit equilibrium method, numerical simulation and practical research methods, this paper analyzes and evaluates the non-working slope of open pit mine in West China, which is based on hydrogeological data of open pit mine in West China. Through field investigation and physical and mechanical tests, the geological conditions of non-working slope and the physical and mechanical properties of rock and soil are fully grasped, which lays a data foundation for the analysis and evaluation of slope stability. The stability of non-working slope is analyzed and evaluated by using Bishop method, simple step method and Spencer method in GEO-SLOPE software. At the same time, FLAC3D software is used to simulate the non-working slope. By analyzing the stress, displacement, shear strain rate and shear strain variables of the slope, it is concluded that the slope is in a relatively stable state. The potential danger area is mainly concentrated in the local area of 9 coal seam and the area below the surface soil steps above 9 coal seam, which verifies the accuracy of the limit equilibrium theory. At the same time, combined with the actual excavation situation on the spot, the corresponding slope anti-slip and treatment scheme are put forward. To ensure open-pit coal mine normal propulsion and safety production.
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD824.7
本文编号：2400789
[Abstract]:The study of slope stability in open-pit mines is an indispensable part in the design of open-pit mines, and it is also the key point and difficulty in the exploration of economic safety in contemporary mines. Due to the development of open-pit mine engineering and the continuous expansion and extension of mining scale, the instability of open-pit slope becomes increasingly severe, and the stability of slope has become an important factor in mine production and economic efficiency improvement. This paper is based on the non-working slope in the first mining area of West China Open-pit Mine. Because the overlying strata in this area are covered by the quaternary aeolian sand, the surface loess joints are developed, and the cracks can even cause the circular arc landslide. The strata in this area are mainly composed of conglomerate and sandy gravel. When the rainy season comes, the slope weakening phenomenon is serious, the slope is a typical soft rock slope, and the slope instability occurs from time to time. At present, West China Open-pit Mine is in the stage of stripping mining in the first mining area. With the advance of mining progress, the exposure time of non-working slope is too long and the weathering effect is serious, so it is urgent to analyze and evaluate the stability of its non-working slope. Through theoretical analysis, geotechnical test, limit equilibrium method, numerical simulation and practical research methods, this paper analyzes and evaluates the non-working slope of open pit mine in West China, which is based on hydrogeological data of open pit mine in West China. Through field investigation and physical and mechanical tests, the geological conditions of non-working slope and the physical and mechanical properties of rock and soil are fully grasped, which lays a data foundation for the analysis and evaluation of slope stability. The stability of non-working slope is analyzed and evaluated by using Bishop method, simple step method and Spencer method in GEO-SLOPE software. At the same time, FLAC3D software is used to simulate the non-working slope. By analyzing the stress, displacement, shear strain rate and shear strain variables of the slope, it is concluded that the slope is in a relatively stable state. The potential danger area is mainly concentrated in the local area of 9 coal seam and the area below the surface soil steps above 9 coal seam, which verifies the accuracy of the limit equilibrium theory. At the same time, combined with the actual excavation situation on the spot, the corresponding slope anti-slip and treatment scheme are put forward. To ensure open-pit coal mine normal propulsion and safety production.
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD824.7
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本文编号：2400789
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