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Close Distance Coal Seams Softrock Ascending Mining Roadway Case Analysis
Author(s): 
Pages: 27-28,39
Year: Issue:  10
Journal: Coal

Keyword:  上行开采巷道位置升斗梁结构锚杆支护;
Abstract: 珲春矿区含煤地层属于松软岩层.板石一矿19煤层与20煤层层间距16~36 m,属于近距离煤层.12002采煤工作面长度200 m,采高2.8 m,走向长度900 m,综采工艺, 2008年5月开始回采,2009年初到达停采线,现已封闭.准备2009年4月开采20煤层之上的19煤层.设计11902上、下巷与12002采煤工作面回风和运输巷重叠.现对11902开采巷道的安全可靠性进行分析.
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