水力冲孔对松软煤层回采巷道煤帮变形影响性研究  

Study on Influence of Hydraulic Flushing on Coal Side Deformation in Mining Roadway of Soft Coal Seam

作　　者：惠钰博 郑玉晶 赵龙刚 刘建康 张盛[1] 邵林 王帅宾 HUI Yubo;ZHENG Yujing;ZHAO Longgang;LIU Jiankang;ZHANG Sheng;SHAO Lin;WANG Shuaibin(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Jiulishan Mine,Henan Coal Chemical Industry Group Coking Coal Group,Jiaozuo 454005,China;No.2 Mine of Yungaishan Coal Mine,Henan Yongjin Energy Co.,Ltd.,Yuzhou 461670,China)

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000 [2]河南煤业化工集团焦煤集团九里山矿,河南焦作454005 [3]河南永锦能源有限公司云盖山煤矿二矿,河南禹州461670

出　　处：《煤炭技术》2023年第2期39-43,共5页Coal Technology

基　　金：国家自然科学基金青年基金项目(52004081)。

摘　　要：采用水力冲孔技术在治理煤层瓦斯的同时,对回采巷道松软煤层的稳定性存在影响,分析了云盖山二矿23304工作面运输顺槽受水力冲孔抽采瓦斯过程中对煤帮变形的影响因素,采用FLAC数值模拟方法研究了冲孔造成孔洞和煤体受水湿润对煤巷围岩变形的影响规律。结果表明,水力冲孔形成的孔洞对煤巷周围有一定卸压作用,但同时会降低煤体强度,再加上煤体受浸水湿润,煤帮容易形成较大变形。巷帮煤体位移与冲煤量符合非线性正函数关系,与钻孔布置间距符合非线性负函数关系,对于煤层实施水力冲孔抽采瓦斯后煤巷变形及围岩控制有一定的参考价值。It has influence on the stability of soft coal seam in mining roadway while treating coal seam gas with hydraulic flushingtechnology.The influencing factors of coal sidedeformation in the process of hydraulic flushing gas extraction in 23304 working face in No.2 mine of Yungaishan coal mine were analyzed.FLAC numerical simulation method was used to study the influence of holes caused byhydraulic flushing and coal wetting on surrounding rock deformation of coal roadway.The results show that the hole formed by hydraulic flushing has a certain pressure relief effect around the coal roadway.However,when the coal strength is reduced and the coal is soaked and wet,the coal wall is easy to form large deformation.In addition,the displacement of roadway wall is in line with the non-linear positive function relation with coal flushing quantity and the non-linear negative function relation with the spacing of boreholes.It has a certain reference value for coal sidedeformationand surrounding rock controlafter hydraulic flushingin hole gas extraction in coal seams.

关 键 词：水力冲孔 松软煤层 煤帮变形 围岩控制 

分 类 号：TD325[矿业工程—矿井建设]