摘要
新景煤矿8118工作面采用钻孔卸压措施防治冲击地压,通过监测巷道两帮、顶底板的移近量及超前应力随距工作面推进的变化规律,验证缷压钻孔参数的合理性及措施的有效性。结果表明:卸压区域两帮及顶底板移近量明显小于未卸压区域,且围岩应力也有明显下降,二次卸压更有利于形成应力弱化带,卸压效果明显。实践结果验证了二次钻孔卸压的有效性及相应参数的合理性。
The paper introduces the application of bore-hole pressure relief in anti-rock-burst at 8118 working face of Xinjing Colliery by monitoring the convergence of two sides and roof-to-floor and the variation of advanced stress with the distance from the working face, whose results show that the convergence of two sides and roof-to-floor in the pressure relief area is significantly smaller than that in the unrelieved area with the surrounding rock stress decreasing significantly;the secondary pressure relief is more conducive to the formation of the stress weakening zone with obvious pressure relief effect;and the effectiveness of the secondary borehole pressure relief and the rationality of the corresponding parameters are verified.
作者
杨志鹏
Yang Zhipeng(Shanxi Xinjing Coal Co., Ltd., Yangquan, ShanXi 045000)
出处
《江西煤炭科技》
2019年第2期129-131,135,共4页
Jiangxi Coal Science & Technology
关键词
钻孔卸压
钻孔参数
围岩变形
超前应力
bore-hole pressure relief
drilling parameters
surrounding rock deformation
advanced stress
