地下采矿对岩质坡体稳定性影响的参数敏感性分析  

Influence parameter sensitivity of underground mining on rock slop stability

作　　者：徐洪[1,2] 姚光华[1,2] 

机构地区：[1]外生成矿与矿山环境重庆市重点实验室(重庆地质矿产研究院),重庆400042 [2]煤炭资源与安全开采国家重点实验室重庆研究中心,重庆400042

出　　处：《采矿与安全工程学报》2013年第4期573-577,582,共6页Journal of Mining & Safety Engineering

基　　金：重庆市国土资源和房屋管理局科技计划项目(CIGMR1101)

摘　　要：为了获得地下采矿对岩质坡体稳定性的影响规律,采用数值模拟方法,结合正交试验,分别就开采过程中煤层厚度、开采深度、采空区的面积、工作面与坡体的相对位置以及煤层倾角等因素变化对坡体稳定性的影响过程及其敏感性进行了分析。结果表明,采矿活动对坡体稳定性的影响随采空区面积和煤层厚度的增加而增加,随煤层倾角以及采空区与坡体距离增大而减小,开采深度对坡体稳定性的影响表现在先增加后降低,当深度在200~250 m时开采对坡体稳定性的影响最大。在满足生产需求的条件下,控制采空区面积是减少开采对坡体稳定性影响的最有效手段。To obtain the influence of underground mining activity on rock slop stability, by using nu-merical simulation and orthogonal experiment, the influencing process of main factor changes （ e.g. coal seam thickness, mining depth, goaf size, relative position between coal face and slop, coal seam dip an- gle） on rock slop stability and the parameter sensitivities during mining process were analyzed in this paper. The results show that the influence degree of mining activity on rock slop stability increases with the increase of goaf size and coal seam thickness, and decreases with the increment of coal seam dip an- gle and relative position between coal face and slop. Meanwhile, the influence of mining depth on slop stability firstly increases, then decreases, while mining in the depth between 200-250re.most influence the slop stability. When meeting the production demands, the goaf size control is the best method to re-duce the influence of mining activity on rock slop stability.

关 键 词：岩质坡体 参数敏感性 稳定性 安全系数变化率 

分 类 号：TD323[矿业工程—矿井建设]