孤岛煤柱膏体充填开采覆岩运动规律研究  

Study on the Law of Overburden Movement during Isolated Coal Pillar Mining with Paste Filling

作　　者：温国惠[1] 李秀山[1] 蒲志强[1] 陈绍杰[2] 

机构地区：[1]淄博矿业集团有限责任公司岱庄煤矿,山东济宁272175 [2]山东科技大学矿山灾害预防控制教育部重点实验室,山东青岛266510

出　　处：《山东科技大学学报（自然科学版）》2010年第4期46-50,共5页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(50874070);教育部博士点专项基金项目(200804240004);山东省自然科学基金项目(Y2008F01);矿山灾害预防控制教育部重点实验室开放基金项目(MDPC0806)

摘　　要：为研究孤岛煤柱膏体充填开采覆岩运动规律,对岱庄煤矿2351膏体充填工作面支架压力进行了实际观测和分析。由于周围工作面回采结束时间较长,采空区内覆岩跨落后已经基本稳定。该工作面充填开采顶板初次来压步距为33.6 m,监测到的前4次周期来压步距分别为18.3、8.8、13.79、m。膏体充填条带煤柱开采采场与覆岩结构的特殊性决定了第一个周期来压步距相对较大。由于三面采空,虽然采用膏体充填采空区支撑上覆岩层,工作面顶板及其上覆岩层的断裂和下沉仍然十分显著。充填膏体的支撑作用使采场宏观矿压显现不明显,但三面的采空导致支架上的工作阻力较大,在推采停顿时间较长时矿压显现尤为明显。In order to study the law of overburden movement during isolated coal pillar mining with paste filling,the pressures on supports in Face 2351 with paste filling in Daizhuang coalmine were observed and analyzed.Because it was a long time after mining,the overburden collapsed was basically stable in goaf around Face 2351.The first weighting spacing was 33.6 m in the face,and the spacing of first 4 periodic weighting monitored was 18.3,8.8,13.7,9 m.The special structure of the working face and overburden in paste filling strips determined that the first periodic weighting spacing was larger than others.Although the overburden was supported with filled paste,the rupture of roof and subsidence of overlying strata were quite obvious with three sides of the face being gobs.The supporting action of filled paste resulted that the macro-mining pressure was not obvious in the face,but the situation of coal mined out in three sides of the face leaded that the working resistance on supports became greater,and the ground pressure occurred more obviously,especially after the longer stop of the mining.

关 键 词：孤岛煤柱 膏体充填 覆岩运动 来压步距 

分 类 号：TD325[矿业工程—矿井建设]