摘要
为了确保冲击地压矿井安全高效生产,采用锚索支护与钻孔爆破卸压方式确保巷道围岩安全稳定性,以胡家河矿402101工作面为背景,利用现场试验的研究方法,分析了爆破卸压对锚索锚固力及工作阻力、围岩结构损伤等。研究结果表明:锚索锚固力的失效与爆破卸压孔相对位置关联性较小,预紧力在爆破卸压前后损失值具有一致性,基本在40%~50%之间;爆破卸压前后,锚索工作阻力基本不变,分别为101.6 kN和99.4 kN,但对围岩结构完整性具有一定影响,结构劣化区域与爆破卸压孔具有一定关联性,为后续爆破卸压优化提供参考。
To ensure the safe and efficient production of the rock burst mine,the anchor cable support and borehole blasting were adopted to ensure the safety and stability of the wall rocks of roadways.Based on the conditions in the 402102 working face of Hujiahe Mine,the anchoring force,working resistance and damage of wall rock structures were analyzed by field tests.The results show that the failure of anchoring force has little relation with the relative location of the pressure relief hole,and the pre-tightening force before and after relief blasting has the same loss,typically 40%~50%.The working resistance of the cable is basically stable,101.6 kN and 99.4 kN,respectively,but it has a certain influence on the structural integrity of the surrounding rocks,and there is a connection between the structural deterioration area and the blasting pressure relief hole,which provides a reference for the optimization of pressure relief of subsequent blasting.
作者
张红卫
ZHANG Hongwei(Shaanxi Binchang Hujiahe Mining Co.,Ltd.,Changwu 713600,China)
出处
《煤炭工程》
北大核心
2024年第7期120-126,共7页
Coal Engineering
基金
天地科技基金(2021-TD-MS011)
国家自然科学基金项目(52174080,51974160)。
关键词
冲击地压
卸压
锚固力
锚索工作阻力
围岩结构
rock burst
stress relief
anchoring force
working resistance of anchor cable
wall rock structure
作者简介
张红卫(1975-),男,河南濮阳人,高级工程师,现从事矿压压力与岩层控制方面的研究工作,E-mail:490096568@qq.com。
