近距煤层群不同层间岩层结构下围岩裂隙演化规律  

Fracture Evolution Laws of Surrounding Rock Under Different Strata Rock Structures in Short Distance Coal Seam Group

作　　者：张春雷 李占平[1] 康强 ZHANG Chunlei;LI Zhanping;KANG Qiang(International Engineering Company of China Coal Technology and Engineering Group,Beijing 100013,China;China University of Mining ＆ Technology（Beijing）,Beijing 100083,China;Tiandi Science and Technology Company Limited,Beijing 100013,China)

机构地区：[1]中煤科工集团国际工程有限公司,北京100013 [2]中国矿业大学(北京),北京100083 [3]天地科技股份有限公司,北京100013

出　　处：《煤矿安全》2018年第9期91-95,共5页Safety in Coal Mines

基　　金：国家重点研发计划资助项目(2016Y FC0600708);国家自然科学基金面上资助项目(51474128)

摘　　要：为研究近距煤层群开采不同层间岩层结构下围岩裂隙演化规律,以神东某矿近距离煤层群为研究背景,应用关键层理论对其层间结构进行了分类,并依据不同层间距离及亚关键层数建立了2个UDEC数值模型。得到了以下结论:层间含单一亚关键层时,层间距离增加,对于近距离煤层群覆岩裂隙演化影响不大;亚关键层的位置,层数会影响覆岩裂隙的动态发育和分布规律,但不会影响裂隙发展高度;岩性和厚度相同的两亚关键层对层间裂隙发育有抑制裂隙发育范围增大的作用。In order to study the fracture evolution laws of surrounding rock under different strata rock structures in short-distance coal seam group, based on the background of the coal seam group in Shendong Coal Mine, the interlayer structure was classified by the key strata theory, and four UDEC numerical models were established according to the distance between different layers and the number of inferior key strata. The conclusions were as follows： when there was only one inferior key strata between the two coal seams, the increase of the distance between these two coal seams would have little effect on the fracture evolution of the overburden rock mass; the location and number of inferior key strata would affect the dynamic development and distribution of overburden fissures, while it would not affect the height of fracture distribution; the two inferior key strata with same properties and thickness would decrease the range of fracture distribution.

关 键 词：煤层群 层间结构 UDEC数值模拟 围岩裂隙演化 关键层理论 

分 类 号：TD325[矿业工程—矿井建设]