黑岱沟露天矿排土场边坡稳定性研究
发布时间：2018-10-26 18:40
【摘要】：露天矿边坡滑坡的问题，其根本原因就是边坡稳定性出现了问题。如果遇到稳定性问题却不将其放在排土场设计和开采生产之前解决，这将给矿山生产带来极大的技术安全问题甚至出现安全事故，对边坡稳定性问题的重视程度在国内外都得到了充分体现。多年来通过大量的实例与理论相结合的研究，形成了趋于成熟的，且针对边坡实际问题具有很高的使用价值的边坡稳定性分析概论和方法。但是，因为任何一个露天矿边坡都是不可复制的，露天矿的不同其本身也必将具有不同的特点，所使用的分析方法也是不同的。针对黑岱沟露天矿阴湾排土场发生的滑坡事件，在相关文献资料以及与黑岱沟矿坑周边4个外排土场——北排、西排、东排和东沿帮排土场，1个内排土场条件的对比为依托下初步确定其滑坡主要影响因素为水的影响并对此展开课题研究，内容如下： 通过对以往资料的查阅和实习期间的现场实地考察，由于2013年采场转向，阴湾排土场承担着较大的剥离外排量，另阴湾南部力量煤业排水长期浸泡阴湾排土场基底，导致基底承载力骤减，影响了排土场稳定性。 利用工程地质钻探取得滑坡区域岩土试样进行室内岩土物理力学试验。通过室内试验和反分析综合研究，确定了滑带土的抗剪强度指标。通过工程地质、水文地质条件及岩土物理力学综合分析，基本确定阴湾滑坡的成因。 通过反分析所得物理力学参数利用SLOPE/W计算阴湾剖面YW—1、YW-2、YW-3边坡安全系数，，由此确立以YW—1剖面为主要研究对象。 提出采用排土压脚的方法对阴湾排土场进行治理，用压脚法增加边坡下部区域排弃物的自重，使滑坡区域的抗滑力从整体上增加；提出分别压脚至标高+1170m平盘和+1200m平盘两种方案，选取典型剖面后利用极限平衡分析法，计算两种方案压脚之后各自排土场稳定性变化如何。 在压脚排土区域设置地面防排水系统。设计采用“截、排、蓄、抽”四位一体的综合防排水体系。基于拉格朗日显式差分（FLAC）有限差分方法，根据阴湾排土场工程地质模型，排弃物采用摩尔—库伦模型，边坡组成成分采用理想的弹塑模型来描述，坡倾向长度为560m，边坡垂直最高高度为135m建立FLAC3D计算模型对排土场边坡治理后的稳定性进行数值分析。
[Abstract]:The fundamental cause of slope landslide in opencast mine is the problem of slope stability. If the stability problem is not solved before the dump design and mining production, it will bring great technical safety problems and even safety accidents to the mine production. The degree of attention to slope stability has been fully reflected both at home and abroad. Over the years, through the research of a large number of examples and theories, an introduction and method of slope stability analysis have been formed, which tend to be mature and have high practical value for slope problems. However, because any open pit slope can not be duplicated, the different open-pit mine itself must have different characteristics, and the analytical methods used are also different. In view of the landslide event in Yingwan dump of Heidaigou opencast mine, the relevant documents and 4 external dump sites around Heidaigou mine pit are as follows: North row, west row, east row and eastern side dump. Based on the comparison of the conditions of an internal dump, it was preliminarily determined that the main influencing factor of the landslide was the influence of water. The contents are as follows: through the reference of the previous data and the on-the-spot investigation during the practice period, Because of the stope turning in 2013, the Yin-Wan dump bears a large amount of stripping out, and the drainage of power coal industry in the southern part of Yin-wan soaks the base of Yin-wan dump for a long time, which results in the sudden reduction of the bearing capacity of the basement and affects the stability of the dump. The rock and soil samples of landslide area were obtained by engineering geological drilling, and the laboratory geotechnical physical and mechanical tests were carried out. The shear strength index of sliding zone soil is determined by laboratory test and inverse analysis. Through the comprehensive analysis of engineering geology, hydrogeological conditions and geotechnical physics and mechanics, the cause of the Yinwan landslide is basically determined. The safety factor of YW-1,YW-2,YW-3 slope in Yinwan profile is calculated by using SLOPE/W through back analysis of physical and mechanical parameters, and the main research object is YW-1 section. It is put forward that the method of draining and pressing feet is used to treat the dumping site in Yinwan, and the deadweight of the discards in the lower part of the slope can be increased by the method of pressing feet, so as to increase the anti-slide ability of the landslide area as a whole. Two schemes, 1170m flat plate and 1200m horizontal plate, are put forward respectively. After selecting typical section, the stability of the dump after pressing foot is calculated by using limit equilibrium analysis method. The ground drainage system is installed in the draining area of the foot. Design of "cut, row, storage, pumping" integrated waterproofing and drainage system. Based on Lagrangian explicit difference (FLAC) finite difference method, according to the engineering geological model of Yin-Wan dump, the mole-Coulomb model is used to describe the discards, the composition of the slope is described by an ideal elastic-plastic model, and the slope inclination length is 560m. The FLAC3D model was established to analyze the slope stability after the treatment of the dump slope with the maximum vertical height of 135m.
【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】：TD824.8
[Abstract]:The fundamental cause of slope landslide in opencast mine is the problem of slope stability. If the stability problem is not solved before the dump design and mining production, it will bring great technical safety problems and even safety accidents to the mine production. The degree of attention to slope stability has been fully reflected both at home and abroad. Over the years, through the research of a large number of examples and theories, an introduction and method of slope stability analysis have been formed, which tend to be mature and have high practical value for slope problems. However, because any open pit slope can not be duplicated, the different open-pit mine itself must have different characteristics, and the analytical methods used are also different. In view of the landslide event in Yingwan dump of Heidaigou opencast mine, the relevant documents and 4 external dump sites around Heidaigou mine pit are as follows: North row, west row, east row and eastern side dump. Based on the comparison of the conditions of an internal dump, it was preliminarily determined that the main influencing factor of the landslide was the influence of water. The contents are as follows: through the reference of the previous data and the on-the-spot investigation during the practice period, Because of the stope turning in 2013, the Yin-Wan dump bears a large amount of stripping out, and the drainage of power coal industry in the southern part of Yin-wan soaks the base of Yin-wan dump for a long time, which results in the sudden reduction of the bearing capacity of the basement and affects the stability of the dump. The rock and soil samples of landslide area were obtained by engineering geological drilling, and the laboratory geotechnical physical and mechanical tests were carried out. The shear strength index of sliding zone soil is determined by laboratory test and inverse analysis. Through the comprehensive analysis of engineering geology, hydrogeological conditions and geotechnical physics and mechanics, the cause of the Yinwan landslide is basically determined. The safety factor of YW-1,YW-2,YW-3 slope in Yinwan profile is calculated by using SLOPE/W through back analysis of physical and mechanical parameters, and the main research object is YW-1 section. It is put forward that the method of draining and pressing feet is used to treat the dumping site in Yinwan, and the deadweight of the discards in the lower part of the slope can be increased by the method of pressing feet, so as to increase the anti-slide ability of the landslide area as a whole. Two schemes, 1170m flat plate and 1200m horizontal plate, are put forward respectively. After selecting typical section, the stability of the dump after pressing foot is calculated by using limit equilibrium analysis method. The ground drainage system is installed in the draining area of the foot. Design of "cut, row, storage, pumping" integrated waterproofing and drainage system. Based on Lagrangian explicit difference (FLAC) finite difference method, according to the engineering geological model of Yin-Wan dump, the mole-Coulomb model is used to describe the discards, the composition of the slope is described by an ideal elastic-plastic model, and the slope inclination length is 560m. The FLAC3D model was established to analyze the slope stability after the treatment of the dump slope with the maximum vertical height of 135m.
【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】：TD824.8
【参考文献】
相关期刊论文 前10条
1 李铁锋,潘懋,刘瑞s
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