千米瓦斯矿井小煤柱巷道滞后解危技术  

Technology of delay in solving danger in small pillar roadway of kilometer gas mine

作　　者：刘毅涛 王健达 苏振国 李少刚 莫云龙[2,3] 毕慧杰 LIU Yitao;WANG Jianda;SU Zhenguo;LI Shaogang;MO Yunlong;BI Huijie(Ordos Yihua Mining Resources Co.,Ltd.,Ordos 017318,China;Mine Safety Technology Branch,China Coal Research Institute Co.,Ltd.,Beijing 100013,China;National Key Lab of Coal Resources High Efficient Mining and Clean Utilization,China Coal Research Institute,Beijing 100013,China)

机构地区：[1]鄂尔多斯市伊化矿业资源有限责任公司,内蒙古鄂尔多斯017318 [2]煤炭科学技术研究院有限公司安全分院,北京100013 [3]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013

出　　处：《煤矿安全》2021年第8期102-106,112,共6页Safety in Coal Mines

摘　　要：针对千米瓦斯矿井回采过程中小煤柱巷道受相邻采空区侧向悬顶影响的问题,以某矿1208工作面小煤柱巷道为研究背景,在进行工程实践基础上,详细介绍了双端封堵水力压裂技术滞后解危的施工工艺和方法,并对工程施工效果进行了分析。结果表明:双端封堵水力压裂技术可以规避裂隙存在,能够实现有效保压,是侧向悬顶滞后解危的较好方法;基于钻孔窥视、应力监测、矿压规律分析,切顶后围岩裂隙发育明显,采动影响前侧向悬顶已经破断,表现为钻孔应力计数据明显下降,二次采动影响下工作面下部来压明显减弱,实现了良好的解危效果。Aiming at the problem that the small coal pillar roadway is affected by the lateral hanging roof of adjacent goaf in the mining process of kilometer gas mine, taking the small coal pillar roadway of 1208 working face in a mine as the research background. On the basis of engineering practice, this paper introduces the construction technology and method of double end plugging hydraulic fracturing technology in detail, and analyzes the engineering construction effect. The research results show that the double end plugging hydraulic fracturing technology can avoid the existence of fractures and achieve effective pressure maintenance, which is a better method for lateral hanging roof lag;based on borehole peeping, stress monitoring and analysis of mine pressure law, the cracks of surrounding rock are obviously developed after roof cutting, and the front overhanging roof affected by mining has been broken, which shows that the borehole stress meter data is significantly decreased, and the pressure at the lower part of the working face is significantly weakened under the influence of secondary mining, achieving a good effect.

关 键 词：小煤柱巷道 侧向悬顶 水力压裂 滞后解危 效果检验 

分 类 号：TD322.4[矿业工程—矿井建设]