基于荷载扰动深度的矿山采动场地稳定性分析  

Stability evaluation of mining-induced area basedon depth of loading disturbance

作　　者：郭松 何习平[1] 张红梅[1] 周平 付博 尹晓星 GUO Song;HE Xiping;ZHANG Hongmei;ZHOU Ping;FU Bo;YIN Xiaoxing(School of Hydraulic Engineering,Nanchang Institute of Technology,Nanchang 330099,China;School of Marxism,Nanchang Institute of Technology,Nanchang 330099,China;School of Civil and Architectural Engineering,Nanchang Institute of Technology,Nanchang 330099,China)

机构地区：[1]南昌工程学院水利工程学院,江西南昌330099 [2]南昌工程学院马克思主义学院,江西南昌330099 [3]南昌工程学院土木与建筑工程学院,江西南昌330099

出　　处：《南昌工程学院学报》2024年第1期59-64,共6页Journal of Nanchang Institute of Technology

基　　金：江西省教育厅科学技术研究项目(GJJ2201512);南昌工程学院博士科研启动项目(2022KYQD003)。

摘　　要：荷载扰动下的安全临界深度作为判别矿山采动场地稳定性的关键指标,对矿山地质安全与变形控制具有重要指导意义。采用极限平衡法分析壁式开采采空区破裂岩体自然平衡应力拱结构特征,利用角点法计算矩形均布荷载作用下地基中附加应力影响深度,推导了地下开采工作面与上方荷载扰动下的临界深度计算公式。以山东省济宁市某矿山采动场地稳定性评价为工程实例的研究结果表明:顾及上覆荷载附加应力的采空区活化的临界深度为159.5m,与采用开采条件判别法和地表移动变形判别法得到的场地稳定性评价结果一致。研究成果可为相似地质采矿条件下采空区破裂岩体结构特征分析与矿山安全地质危险性评价提供理论指导。The safety depth under load disturbance,as a key index for judging the danger of mining extraction sites,is of great guiding significance for mine geosafety and deformation control.The limit equilibrium method is used to analyze the structural characteristics of the natural equilibrium stress arch of the ruptured rock body in the wall mining area,and the depth of the additional stress influence in the foundation under the rectangular homogeneous load is calculated by using the angular point method,and the formula for calculating the critical depth under the load perturbation in the underground mining working face and the upper part of the mine is deduced.The results of the study using the stability evaluation of the mining site of a mine in Jining City,Shandong Province as an engineering example show that the critical depth of the activation of the mining void zone taking into account the additional stresses of the overlying load is 159.5 m.The comparison of the results of the stability evaluation of the site obtained by using the discriminative method of the mining conditions and the discriminative method of the ground movement and deformation is consistent,which proves the effectiveness and feasibility of the proposed method.The research results can provide scientific theoretical support for the structural characterization of the fractured rock body in the post-mining area under similar geological mining conditions and the evaluation of the geological risk of mine safety.

关 键 词：沉陷控制 采动场地 极限平衡法 均布荷载 临界深度 

分 类 号：TD325[矿业工程—矿井建设]