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

作　　者：孙爱国 李海涛 程学政 王毅 王宇 SUN Aiguo;LI Haitao;CHENG Xuezheng;WANG Yi;WANG Yu(Qianyingzi Coal Mine,Anhui Hengyuan Coal and Power Co.,Ltd..,Suzhou 234001,China;School of Mining Engineering,China University of Mining and Technology,Xuzhou 221000,China)

机构地区：[1]安徽恒源煤电股份有限公司钱营孜煤矿,安徽宿州234001 [2]中国矿业大学矿业工程学院,江苏徐州221000

出　　处：《煤矿安全》2024年第7期136-144,共9页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51874285)。

摘　　要：根据钱营孜煤矿工程地质特征及生产技术水平,提出切顶卸压巷道围岩稳定控制技术。针对回采巷道超前段、滞后段、留巷稳定段分别提出超前补强支护、巷旁挡矸防护及滞后临时支护技术措施;通过实时监测系统对沿空巷道锚索受力和围岩变形情况进行监测,研究巷道及采场围岩的变形特征,并与现有的沿空留巷进行对比分析,揭示中厚煤层爆破切顶无煤柱自成巷矿压的显现规律。结果表明:在距离工作面170 m位置,巷道围岩顶底板及两帮变形速率达到最大值,此阶段围岩变形最为剧烈;之后变形趋于平缓,滞后工作面220 m时围岩变形到达稳定阶段;预裂爆破切顶沿空留巷施工工艺在钱营孜煤矿W3233工作面应用效果达到了预期目标。According to the engineering geological characteristics and production technology level of Qianyingzi Coal Mine,the stability 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 protection and lagging temporary support were proposed.Through the real-time monitoring system,the stress of anchor cable and surrounding 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 application effect of the pre-cracking blasting cutting roof for gob-side entry retaining in the W3_233 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 

分 类 号：TD322[矿业工程—矿井建设]