摘要
针对深部采掘工作面局部卸压排放措施孔间距不合理导致遗留空白带动力灾害危险性增大的难题,通过引用超前钻孔围岩应力模型、孔裂隙混合瓦斯压力下扩展力学模型分析了超前卸压排放钻孔弱化煤体弹性能、瓦斯膨胀能级消突作用机理及钻孔有效作用半径试验考察理论基础,结合下峪口煤矿2#典型松软低透突出煤层瓦斯赋存特征基于流量法进行了超前钻孔卸压排放有效作用半径试验,并进行了工作面局部措施孔群优化。
According to the problems that deep mining work face local relief measures emissions hole spacing is not reasonable and it leads to the increase of left blank dynamic disaster risk, referencing the advanced borehole surrounding rock mechanics model and the pore - fracture mixed gas pressure expansion mechanics model, the article analyzes the advance pressure relief discharge hole weake- ning coal gas expansion energy of elastic properties of outburst mechanism and effective radius drilling test theory, combined with gas occurrence characteristics of 2# typical soft and low permeability outburst coal seam in Xiayukou Coal Mine, the effective radius of ac- tion of advanced borehole pressure relief and discharge based on the test of flow method is carried out, and the swarm optimization for working face local measures hole is carried out too.
出处
《煤矿安全》
CAS
北大核心
2014年第3期119-122,共4页
Safety in Coal Mines
基金
中煤科工集团重庆研究院自立一般资助项目(2012YBXM43)
中煤科工集团重庆研究院自立重点资助项目(2012ZDXM10)
关键词
深部突出煤层
卸压排放
局部措施
优化分析
超前钻孔
deep outburst seam
pressure relief and discharge
local measure
optimization analysis
advanced borehole
