深部极近距离煤层群开采底抽巷层位布置研究  

Layout study of bottom drainage roadway in deep mining of very close adjacent coal seam group

作　　者：郭明功 李延河[1] 宋大钊 杨港 邱黎明 杨乘 GUO Minggong;LI Yanhe;SONG Dazhao;YANG Gang;QIU Liming;YANG Cheng(Pingdingshan Tian’an Coal Industry Co.,Ltd.,Pingdingshan 467100,China;School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;State Key Laboratory of Coking Cool Resources Green Exploitation,Pingdingshan 467002,China;Guizhou Panjiang Coal Power Group Technology Research Institute Co.,Ltd.,Guiyang 550000,China)

机构地区：[1]平顶山天安煤业股份有限公司,河南平顶山467100 [2]北京科技大学土木与资源工程学院,北京100083 [3]炼焦煤资源绿色开发全国重点实验室,河南平顶山467002 [4]贵州盘江煤电集团技术研究院有限公司,贵州贵阳550000

出　　处：《煤矿安全》2024年第3期155-165,共11页Safety in Coal Mines

基　　金：国家重点研发计划资助项目(2023YFC3009005);2023年度贵州省科技支撑计划资助项目(黔科合支撑[2023]一般380)。

摘　　要：以平煤八矿深部极近距离煤层群为工程背景,对深部极近距离煤层群开采条件下底抽巷的合理布置层位展开了研究;采用FLAC^(3D)数值模型,模拟了底抽巷顶板与己_(16-17)煤层不同净岩距离下煤层的塑性区、应力场和位移场演化规律。结果表明:当净岩距离为3、5 m时底抽巷上方煤层受到采动影响可以分为卸压区、应力集中区和原岩应力区;净岩距离为8~15 m时,上方煤层受到采动影响可以分为卸压区和原岩应力区;底抽巷的最优布置层位为保留净岩距离8~10 m;底抽巷掘进后,位于其正上方的位置卸压效果最好,该区域煤体充分变形,瓦斯治理较为容易,有利于后期煤巷的支护与维护,是布置煤巷的最佳位置;现场监测有效验证了底抽巷在该净岩距离下治理深部极近距离煤层群工作面瓦斯突出危险性的可靠性。Based on the engineering background of the ultra-close adjacent coal seam group in the deep part of Pingdingshan No.8 coal mine,this paper studies the reasonable layering of bottom pumping roadway under the mining condition of deep ultra-close seam.FLAC^(3D) numerical model is used to simulate the evolution law of the plastic zone,stress field and displacement field of coal seam under different net rock distances between the roof of bottom pumping roadway and Ⅵ_(16-17) coal seam.The results show that when the net rock distance is 3 m or 5 m,the coal seam above the bottom drainage roadway can be divided into pressure relief zone,stress concentration zone and primary rock stress zone under the influence of mining.When the net rock distance is 8 m or more,the coal seam above the bottom drainage roadway can be divided into pressure relief zone and primary rock stress zone under the influence of mining.The optimal layout of bottom drainage roadway is 8-10 m distance from the retained net rock.After the bottom pumping roadway is mined,the position directly above the roadway has the best pressure relief effect,the coal body in this area is fully deformed,the gas control is easier,is conducive to the support and maintenance of the coal roadway in the later period,and is the best position to arrange the coal roadway.Field monitoring effectively verified the reliability of the bottom pumping roadway in the net rock distance to control the gas outburst risk of the working face near the deep seam group.

关 键 词：深部开采煤层 煤与瓦斯突出 瓦斯抽采 底抽巷层位 瓦斯灾害治理 

分 类 号：TD322[矿业工程—矿井建设]