七五生建煤矿冲击危险评价及防冲优化设计研究

Study on the Impact Risk Assessment and Optimization Design of Anti-scour in Qiwu Shengjian Coal Mine

冲击地压是深部煤矿亟待解决的重大问题之一,针对七五生建煤矿3_(上)219工作面存在的冲击地压问题进行了现场论证分析,该工作面冲击危险系数为0.48,鉴定为有弱冲击危险性,通过煤层大直径钻孔卸压法进行了工作面防冲卸压工作。结果表明,在3_(上)219工作面利用大直径钻孔卸压法可较大程度对煤层达到卸压目的,效果优良,保证该工作面安全稳定地生产。

The rockburst is one of the major problems to be solved urgently in deep coal mines.According to the on-site demonstration and analysis of the rock burst problem in the 3_(upper) 219 working face of Qiwu Shengjian Coal Mine,the impact risk coefficient of the working face is 0.48,which is identified as having weak impact risk.The anti-scour and pressure relief work of the working face is carried out through the large-diameter borehole pressure relief method in the coal seam.The results show that the use of large diameter borehole pressure relief method in the 3_(upper) 219 working face can achieve the purpose of pressure relief in coal seams to a large extent,and the effect is excellent to ensure the safe and stable production of this working face.