膏体充填回收条带煤柱覆岩活化规律研究  

Study on Activation Laws of Overlying Strata During Strip Coal Pillar Recovery by Paste Backfill

作　　者：宋光远 周华强[2,3] SONG Guangyuan;ZHOU Huaqiang(Xuzhou Cumt Backfill Technology Co., Ltd., Xuzhou 221116, China;State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China;School of Mines, China University of Mining and Technoloqy, Xuzhou 221116, China)

机构地区：[1]徐州中矿大贝克福尔科技股份有限公司,江苏徐州221116 [2]中国矿业大学煤炭资源与安全开采国家重点实验室矿业工程学院,江苏徐州221116 [3]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤矿安全》2019年第2期228-231,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(50774077);2014年度山西省煤基重点科技攻关资助项目(MI2014-12)

摘　　要：为分析膏体充填回收条带煤柱覆岩活化规律,通过建立条带开采、回收遗留煤柱和单独充填开采3种模型,采用数值模拟和岱庄煤矿膏体充填回收条带煤柱地表沉陷实测,研究得出了充填开采孤岛煤柱引起的覆岩活化机理,以及覆岩活化对地表沉陷影响的程度。研究表明:充填开采覆岩活化程度随着与煤层距离的增加,呈现先增加后减小的趋势,最大活化发生在距煤层100 m内;膏体回收条带煤柱覆岩活化率在15%～30%,反应至地表的在15%左右。To study the activation laws of overlying strata during strip coal pillar recovery by paste backfill, three models of strip mining, residual coal pillar recovery and separate filling mining were established. Based on the numerical simulation and the actual measurement of surface subsidence of coal pillar in the belt of paste filling recovery in Daizhuang Coal Mine, the mechanism of overburden activation caused by filling and mining of isolated island coal pillar and the influence of overburden activation on surface subsidence are studied. The results show that the activation degree of overburden in filling mining tends to increase first and then decrease with the increase of the distance from the coal seam, and the maximum activation occurs within100 m from the coal seam;the ratio of activation of overlying strata during strip coal pillar recovery by paste backfill is 15% to30%, the surface is about 15%.

关 键 词：膏体充填 覆岩活化 活化率 地表沉陷 采带煤柱 

分 类 号：TD823.7[矿业工程—煤矿开采]