摘要:
为了保证露天煤矿含有拉裂缝端帮边坡的安全可靠性,研究分析了拉裂缝发育程度对边坡稳定性的影响规律。总结发现:竖直拉裂缝的出现会导致边坡的安全系数大幅度降低,随着裂缝深度的增加,监测点的位移量也一直在随之增加,安全系数一直呈现降低趋势,但是二者的变化幅度都在减小。根据边坡滑动破坏特点发现是由于裂缝深度增加,使得滑体下部剪切破坏段的长度也在增加,因此受剪切作用的岩体范围增大,所以下部岩体的抗剪切能力在提高。最后针对顺兴露天矿当前工况条件对西端帮提出了锚索加固结合挂网喷浆防护的治理措施建议,防止裂隙继续向下部岩层延伸扩展。并建议在端帮上裂隙的控制区域进行GPS监测,实时监测边坡的动态变化。
Abstract:
In order to ensure the safety and reliability of the open-pit coal mine end slope with a tensile fracture, the influence on slope stability of the developing degree of the fracture is studied. It is concluded that the occurrence of a tensile fracture will lead to a significant reduction in the safety factor of the slope. As the increase of fracture depth, the displacement of the monitoring points will also increase, and the safety factor will always decrease. The magnitude of the change is decreasing. According to the characteristics of slope sliding failure, it is found that the length of the shear failure section of the lower part of the sliding body is also increased due to the increase of the fracture depth. Therefore, the range of the rock mass during the shear is increased, so the shear resistance of the lower rock mass is improved. At last, according to the current working conditions, some suggestions are proposed for the west end to prevent the crack from extending to the lower rock layer, it is suggested that GPS monitoring should be carried out in the control area of the crack on the end wall to monitor the dynamic change of the slope in real time.
百度学术
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