煤矿安全2024，Vol.55Issue(7)：136-144,9.DOI:10.13347/j.cnki.mkaq.20231069
钱营孜煤矿切顶卸压自动成巷与围岩稳定控制技术研究
Research on automatic roadway formation and surrounding rock stability control technology by roof cutting and pressure relief in Qianyingzi Coal Mine
摘要
Abstract
According to the engineering geological characteristics and production technology level of Qianyingzi Coal Mine,the sta-bility control technology of surrounding rock of the cutting roof and pressure relief roadway is proposed.For the advanced section,lagging section and stable section of the mining roadway,technical measures of advanced reinforcement support,side wall protec-tion and lagging temporary support were proposed.Through the real-time monitoring system,the stress of anchor cable and sur-rounding rock deformation of goaf roadway are monitored,the deformation characteristics of roadway and stope surrounding rock are studied,and the law of mine pressure development in self-formed roadway without coal pillar is revealed by the comparison and analysis with the existing goaf roadway.The results show that the deformation rate of surrounding rock reaches the maximum at the position of 170 m away from the working face,and the deformation of surrounding rock is the most intense at this stage,and then tends to be gentle,and the deformation of surrounding rock reaches the stable stage when the working face lags 220 m.The applica-tion effect of the pre-cracking blasting cutting roof for gob-side entry retaining in the W3233 working face of Qianyingzi Coal Mine has reached the expected goal.关键词
沿空留巷/切顶卸压/矿山压力/预裂爆破/自动成巷Key words
gob-side entry retaining/roof cutting and pressure relief/rock pressure/pre-split blasting/automatic roadway formation分类
矿业与冶金引用本文复制引用
孙爱国,李海涛,程学政,王毅,王宇..钱营孜煤矿切顶卸压自动成巷与围岩稳定控制技术研究[J].煤矿安全,2024,55(7):136-144,9.基金项目
国家自然科学基金资助项目(51874285) （51874285）
