覆岩岩性-结构特征对采空区裂隙带高度的影响  

Influence of Overlying Strata Characteristics of Lithology and Structure on Goaf Fractured Zone Height

作　　者：陈亮[1] 许小凯[2] 

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 [2]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《煤矿安全》2015年第7期36-39,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51274205)

摘　　要：根据软、硬的破坏变形特征,结合岩层发生破断时的极限载荷和极限应变的分析,揭示了软岩对裂隙发育的抑制机理。并提出当关键层位置一定时,在某一岩层（下方自由空间为0）下方相对高位存在软岩或者相对低位存在厚软岩,裂隙不发育,且位于相对低位的厚软岩对裂隙带的高度影响相对较大。对屯留矿N1102和S1206工作面的覆岩岩性结构进行实例分析,得出采空区裂隙带高度分别为23.6-30.5 m和32-34.5 m,并运用注水测漏法进行了现场测定,很好地验证了此方法的准确性。According to different damage and deformation characteristics of soft and hard rock,and with analyzing the rock＇s limit load and limit strain when rock breaking occurs,inhibition mechanism of soft rock on fracture development is founded. It is proposed that fracture development would stop when there are several thick soft rocks at a relatively high position or soft rocks at a relatively low position below the rock whose inferior free space＇s height is as low as 0,as the height of key layer is determined. Comparing with the thin soft rock,the thick soft rocks at a relatively low position have a bigger influence on the height of fissure zone. Taking N1102 and S1206 working faces in Tunliu Mine as examples,and analyzing lithologic characteristics of the overlying rocks,these are concluded that the height of goaf fissure zone in N1102 working face is from 23. 6 m to 30. 5 m,and the other is from 32 m to 34. 5 m. The accuracy of this method was well validated with water leak method.

关 键 词：岩性 破坏变形特征 裂隙带 关键层 注水测漏法 突水 

分 类 号：TD741[矿业工程—矿井通风与安全]