巨厚煤层软弱覆岩分层综放开采覆岩破坏高度研究  

Failure height of weak overburden by layered fully-mechanized mining in extremely thick coal seam

作　　者：韩军[1] 张宏伟[1] 高照宇[1] 荣海[1] 赵象卓 杨发武 王景新 

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]抚顺矿业(集团)有限责任公司老虎台矿,辽宁抚顺113000

出　　处：《采矿与安全工程学报》2016年第2期226-230,237,共6页Journal of Mining & Safety Engineering

基　　金：辽宁省教育厅基金项目(L2012106)

摘　　要：为了确定巨厚煤层软弱覆岩分层综放开采条件下覆岩破坏特征,以老虎台矿55003工作面为对象,采用数值计算、微震监测和瞬变电磁探测方法对区域分层综放开采过程中覆岩破坏高度进行分析,确定了采出厚度与覆岩破坏高度的关系。研究表明,抚顺矿区巨厚煤层软弱覆岩条件下覆岩破坏高度与采出厚度呈线性正相关,覆岩破坏高度为采出厚度的8.4倍。巨厚煤层软弱覆岩的破坏高度比坚硬覆岩综放开采要小。覆岩破坏主要受到油页岩和绿色页岩组成的岩层结构的制约,同时受到F7-1断层和F7断层的影响。To determine the failure characteristics of weak overburden by layered fully-mechanized top coal caving mining, numerical calculation, micro seismic monitoring and transient electromagnetic methods were used in 55003 panel in Laohutai mine to analyze failure height of overburden strata and the relationship between the failure height of overburden and extraction thickness. The results show that the failure height of overburden is linearly related to the extraction thickness under the condition of weak overburden in Fushun mining area, and the failure height of overburden is 8.4 times of extraction thickness. The failure height of overburden with weak layers is smaller than hard overburden in extremely thick coal seam mining. The overburden fracture is mainly controlled by rock structure including oil shale and green shale, and also influenced by F7 fault and F7-1 fault.

关 键 词：巨厚煤层 软弱覆岩 分层综放开采 破坏高度 

分 类 号：TU43[建筑科学—岩土工程]