大采高综采工作面20m煤柱二次复用巷道矿压规律实测研究  

Mine Pressure Practical Measure Research of Reuse Roadway with 20m Coal Pillar of Large Mining Height Fully Mechanized Mining Face

作　　者：汪占领[1,2] 

机构地区：[1]天地科技股份有限公司开采设计事业部,北京100013 [2]煤炭科学研究总院开采研究分院,北京100013

出　　处：《煤矿开采》2017年第2期72-77,共6页Coal Mining Technology

基　　金：国家自然科学基金煤炭联合基金资助项目(U1261211);天地科技股份有限公司青年创新基金资助项目(KJ-2015-TDKC-10)

摘　　要：针对回采工作面二次复用巷道围岩变形量大、支护困难的问题,在枣泉煤矿大采高综采11203工作面进行了20m煤柱二次复用巷道矿压规律实测研究。研究结果表明,二次复用巷道矿压显现主要分为工作面超前影响阶段、剧烈变形阶段、蠕变阶段,巷道在回采工作面后方的变形量可达回采工作面超前影响阶段变形量的4~6倍,巷道顶板浅部离层略大于深部离层;锚杆锚索受力变化比巷道围岩变形对扰动更敏感,受力变化远超前于围岩变形,锚杆锚索受力呈现先增大后减小的趋势,受力急剧增加阶段出现在回采工作面前后50m范围内;巷道顶板和两帮煤岩体在受采动影响后围岩浅部破坏范围有所增加,煤层破碎程度加剧,深部煤岩体出现不同程度破坏现象。In order to solve large deformation of surrounding rock and supporting difficulty problems of reuse roadway of mining face, mine pressure practical measure research was applied on reuse roadway with 20m coal pillar of large mining height fully mechanized mining face 11203. The results showed that mine pressure of reuse roadway could be divided the following three steps, advanced influ- ence stage of working face, severe deformation stage, creep stage, the deformation amount of working face backward was 4 - 6 times of advanced influence stage, the shallow separation of roadway was larger then in deep, the force change of cable and anchor was sen- sitive than to roadway surrounding rock deformation, the force change far ahead of surrounding rock deformation. The force of cable and anchor increased firstly than decreased, the force increased sharply stage appeared around 50m scope of working face, the broken scope in shallow of surrounding rock increased after mining, coal seam broken degree increased sharply, and different degrees broken phenomenon appeared in deep of coal and rock mass.

关 键 词：大采高 综采工作面 二次复用巷道 矿压规律 实测 

分 类 号：TD326[矿业工程—矿井建设]