特厚煤层综放开采覆岩运移规律的相似材料试验研究  

Study of Similar Material Simulation in Research of the Migration Rule of Overlying Strata on Caving Extra-thick Coal Seam

作　　者：赵德深[1] 陈枫[1] 王忠昶[1] 

机构地区：[1]大连大学辽宁省高校复杂结构体系灾害预测与防治重点实验室,辽宁大连116622

出　　处：《大连大学学报》2010年第6期61-64,共4页Journal of Dalian University

基　　金：国家自然基金资助项目(50574016;51009015);辽宁省教育厅科学技术研究基金资助项目(L2010038);辽宁省复杂结构系统灾害预测防治重点实验室开放基金(20100301)

摘　　要：为研究特厚煤层开采上覆岩层垮落特征及覆岩运动规律,以铁煤集团大平煤矿某工作面特厚煤层为原型,运用室内相似材料模拟技术,对煤层开采过程中上覆岩层的周期来压、垮落步距、岩层位移、破坏规律进行模拟和观测研究。结果表明,随着工作面的推进,岩层裂隙自下而上不断发展,初次垮落步距为69m,老顶垮落步距为23m和周期垮落步距为46-52m。覆岩离层存在于采空区正上方的0.7H范围内,最大值位置随高度的增加而在水平方向上远离开切眼位置。本模拟实验结果为特厚煤层综采技术的应用和推广提供了理论依据。The experiment takes the extra-thick coal seam in Tongmeita Mountain as a prototype to research into characteristics of rock collapse and movement of the cover rocks on caving extra-thick coal seam.Similar material simulation is adopted to simulate and observe cycle pressure,collapse span,rocks displacement,and destruction rule of the overlying strata in the process of coal mining.The results show that rocks fracture extended from button as the workspace is pushed,with 69m for initial collapse span,23m for roof collapse span and 46-52m for cycle collapse span.Bed-separation of overlying strata exists in the range of 0.7H above the mined-out area,while the position of the maximum is far away from open cut in the horizontal direction along with the height increase.The simulation experiment provides a theoretical basis for the application and promotion of extra-thick seam mining technology.

关 键 词：特厚煤层 相似材料模拟 垮落步距 离层 

分 类 号：TU821[建筑科学]