深部特厚煤层开采过程中地表变形特征  

Surface deformation characteristics during mining of deep extra-thick coal seams

作　　者：马洪波 MA Hongbo(Shanxi Coal Transportation and Marketing Group Guxian Dongrui Coal Industry Co.,Ltd.,Linfen 042405,China)

机构地区：[1]山西煤炭运销集团古县东瑞煤业有限公司,山西临汾042405

出　　处：《陕西煤炭》2024年第9期6-10,共5页Shaanxi Coal

摘　　要：深部特厚煤层开采过程中会导致地表部分区域出现沉陷、地下水涌出等问题,严重影响地表建筑物的稳定性,同时增加地面人员工作生活的安全隐患。为此,以山西省东瑞煤矿为研究区,基于正在开采的一采区地表变形监测数据,采用理论分析与数值模拟相结合的方法分析将要开采的二采区地表变形特征。结果表明,地表沉降系数与矿区回采率呈正相关,与采高呈负相关,在相同采高和采宽条件下,随着回采率的增大,地表变形参数极值逐渐增大;当区域回采率恒定时,地表变形参数极值随采宽的减小而略有下降;在相同开采宽度下,地表最大倾斜度随回采率和开采高度的增大而增大。In the process of deep ultra-thick coal seam mining,problems such as subsidence and groundwater gushing appear in some areas of the surface,which seriously affects the stability of surface buildings and increases the safety hazards of the work and life of surface personnel.Therefore,based on the surface deformation monitoring data of the first mining area in Dongrui Coal Mine of Shanxi Province,the surface deformation characteristics of the second mining area are analyzed by combining theoretical analysis and numerical simulation.The results show that the surface settlement coefficient is positively correlated with mining yield and negatively correlated with mining height.Under the same mining height and width,the extreme value of surface deformation parameter increases gradually with the increase of mining rate.When the regional mining rate is constant,the peak value of surface deformation parameter decreases slightly with the reduction of mining width.Under the same mining width,the maximum surface slope increases with the increase of mining rate and mining height.

关 键 词：地表变形 深部煤层 特厚煤层 

分 类 号：TD823.25[矿业工程—煤矿开采]