急倾斜煤层圆弧段工作面矿压分布规律  

Mine Pressure Distribution Laws of Arc Segment Working Face in Steeply Inclined Coal Seam

作　　者：任鹏召 王金安[1,2] 韩现刚[1] REN Pengzhao;WANG Jin＇an;HAN Xiangang(School of Civil and Environmental Engineering, University of Science and Technology Beijing,State Key Laboratory of Ministry of Education for High Efficient Mining and Safety of Metal Mine)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《煤矿安全》2018年第4期189-192,196,共5页Safety in Coal Mines

基　　金：国家自然科学基金重点资助项目(U1361208)

摘　　要：急倾斜厚煤层综放开采圆弧段工作面矿压具有显著的局部化和非对称特征,以甘肃省华亭矿区东峡煤矿37220-1工作面为研究背景,结合矿区的地质资料背景,利用FLAC^(3D)对工作面开采进行了数值模拟,并对圆弧段工作面附近的应力变化情况进行了监测。结果分析表明:整个采场空间中存在椭球体式的压力拱壳结构等局部化特征;工作面圆弧段部分与直线段部分连接处围岩应力较大竖向应力出现峰值,上部为岩体自由冒落区,围岩松散,应力出现最小值,对采场进行了局部化分区,指导矿压控制实践。The mining pressure of circular arc segment in the mining of deeply inclined thick coal seam fully mechanized coal face has significant localization and asymmetric features. Taking 37220-1 working face of Dongxia Coal Mine in Huating Mining Area of Gansu province as the research background, combined with the mining geological data as the background data, we firstly make use of FLAC3Dnumerical model to monitor the stress changes of circular arc section near the working face. Result analysis shows that the whole stope space has the local characteristics of the ellipsoidal pressure arch shell structure; the surrounding rock stress is large and the vertical stress is in the peak in the joint of arc segment and straight segment of working face; the upper part is the free caving zone of rock mass, the surrounding rock is loose and the stress appears the minimum value, and local division was conducted to guide the practice of mine pressure control.

关 键 词：急倾斜厚煤层 圆弧段工作面 矿压分布 局部化 自由冒落区 

分 类 号：TD323[矿业工程—矿井建设]