近距离薄煤层联合开采顶板初次来压研究  

Study on Initial Pressure with Roof in Combined Mining of Close Thin Coal Seam

作　　者：王洪 WANG Hong(College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Taiyuan Hua Coal Engineering Design Co.,Ltd,Taiyuan 030024,China)

机构地区：[1]太原理工大学矿业工程学院,山西太原030024 [2]太原华煤工程设计有限公司,山西太原030024

出　　处：《煤矿现代化》2019年第3期63-65,69,共4页Coal Mine Modernization

摘　　要：西山矿务局官地矿2号煤、3号煤层均属于较薄煤层,两层煤平均距离为6.5m,运用理论计算、数值分析和现场跟踪观测等手段,研究了3318工作面顶板初次破断机理。通过建立力学模型,从理论上计算了顶板初次来压步距为21.4m。采用数值软件对工作面开采进行模拟,发现工作面顶板初次来压步距在20～25m。在工作面开采期间现场跟踪观测表明顶板初次来压步距在22.95m左右。该顶板初次来压研究可为其他类似近距离煤层矿井顶板管理提供一定的参考。The coal seam No.2 and No.3 of the Guandi mine of Xishan Mining Bureau belong to the thinner coal seam and the average distance of the two layer coal is 6.5m.The roof first breaking of 3318 working face with the mechanism is studied by means of theoretical calculation,numerical analysis and field tracking observation.By establishing the mechanical model,the theoretical calculation of the roof's first weighting distance is 21.4m.The numerical simulation software is used to simulate the mining face,and it is found that the first step distance of roof is 20m^25m.During field mining,field observation indicates that the roof's first weighting distance is about 22.95m.The study on the first weighting of the roof can provide some reference for other similar coal seam roof management.

关 键 词：近距离煤层 初次来压 断裂步距 3DEC数值模拟 

分 类 号：TD324[矿业工程—矿井建设]