特厚煤层卸压措施有效性实测分析  

Effectiveness Measured Analysis of Pressure Unloading Measures for Extra Thick Coal Seam

作　　者：杜建鹏 魏全德[2,3] 杨光宇 曲效成[3] 

机构地区：[1]义马煤业集团股份有限公司,河南义马472300 [2]北京科技大学土木与资源工程学院,北京100083 [3]北京安科兴业科技股份有限公司,北京100083

出　　处：《煤矿安全》2017年第9期186-189,共4页Safety in Coal Mines

基　　金：国家重点研发计划资助项目(2016YFC0801401)

摘　　要：针对强冲击特厚煤层卸压措施难以选择的工程问题,通过理论研究与现场实测,对大直径卸压钻孔、煤层深孔卸压爆破、煤层注水3种卸压措施,进行了单卸压措施时效性对比实测。现场实测分析结果表明:大直径卸压钻孔卸压效果见效慢,但时效性较强,应作为常规的卸压措施;煤层深孔卸压爆破卸压效果见效快,但时效性较差,短时间内存在应力恢复现象,应作为临时解危措施;煤层注水卸压效果适中,同时具有较强的时效性,但存在应力转移和巷道大变形的情况,对于巷道断面较小的冲击地压工作面不应作为常规防冲措施,可以作为防尘措施实施。For ultra-thick coal seams with strong rock burst tendency, it is difficuh to select proper unloading measures. This investigation compared three unloading methods, such as large diameter unloading borehole method, deep-hole unloading method, and water-injecting method by theoretical study and field monitoring, and some conclusions are drawn. The large diameter unloading borehole method with good timeliness takes slow effect and therefore it can be viewed as a regular unloading method. The deep-hole unloading method with poor timeliness takes a fast effect and hence the stress will recover in a short time. This method can be selected as a temporary unloading method. The water-injecting method with good timeliness takes moderate effect; however, the stress will transfer and roadway may deform heavily. This method can be taken as dust-prevention not rock burst prevention measure for longwall panels with small roadway sections.

关 键 词：特厚煤层 冲击地压 应力监测 大直径卸压钻孔 深孔卸压爆破 煤层注水 

分 类 号：TD324[矿业工程—矿井建设]