近距离煤层采空区下回采巷道矿压显现规律研究  

Research on Strata-pressure Behavior of Roadway Under Gob in Closer Distance Coal Seam

作　　者：王建平[1] 王炳文[1] 邓鹏海 曹鹏[1] 赵海啸[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤炭技术》2014年第4期109-112,共4页Coal Technology

摘　　要：为了研究近距离煤层采空区下回采巷道在回采期间矿压显现规律,对回采工作面巷道围岩结构、围岩变形和松动圈大小进行了现场监测。通过监测结果分析得出,煤柱帮主要由煤和少量泥岩组成,裂隙发育,破碎严重。顺槽两帮最大移近量为0.49 m,顶底板最大移近量为0.41 m。未受采动超前支承应力的影响前巷道松动圈最大为1.3 m,受影响后增加至2.2 m,工作面超前支承压力影响范围为30m。In order to study the mine pressure behave law of roadway under gob in closer distance coal seam,we made a site monitoring on gateway of coal mining face in this paper,including the structure,the deformation variables and the size of loose circle in surrounding rock.By analyzing the monitoring results,we drew a conclusion that the composition of surrounding rock was coal in a great deal and little mudstone,which were seriously broken;the largest sidewall convergence was 0.49 m,the largest floor convergence was 0.41 m.Before the influence of lead abutment pressure,the maximum loose circle was1.3m,and it increased to 2.2m after affected,the influenced range of lead abutment pressure was 30m

关 键 词：近距离煤层 采空区下 围岩变形 松动圈 支承压力 

分 类 号：TD32[矿业工程—矿井建设]