芦岭煤矿碎软煤层群采空区瓦斯立体治理技术应用  

Application of three-dimensional control technology for gas in the goaf of broken soft coal seam group in Luling Coal Mine

作　　者：许文彪 刘云亮 贾秉义 王少雷 Xu Wenbiao;Liu Yunliang;Jia Bingyi;Wang Shaolei(Luling Coal Mine,Huaibei Mining Co.,Ltd.,Suzhou 234113,China;CCTEG Xi’an Research Institute(Group)Co.,Ltd.,Xi’an 710077,China;Guizhou Engineering Research Institute of Oil&Gas Exploration and Development,Guiyang 550081,China;Key Laboratory of Unconventional Natural Gas Evaluation and Development in Complex Tectonic Areas,Ministry of Natural Resources,Guiyang 550081,China)

机构地区：[1]淮北矿业股份有限公司芦岭煤矿,安徽宿州234113 [2]中煤科工西安研究院(集团)有限公司,陕西西安710077 [3]贵州省油气勘查开发工程研究院,贵州贵阳550081 [4]自然资源部复杂构造区非常规天然气评价与开发重点实验室,贵州贵阳550081

出　　处：《能源与环保》2025年第3期65-71,78,共8页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：陕西省自然科学基础研究计划资助项目(2023-JC-ZD-32)。

摘　　要：芦岭煤矿地质条件复杂,主采煤层均为煤与瓦斯突出煤层,瓦斯灾害严重,治理难度大。为了解决特厚碎软强突煤层瓦斯治理问题,实行井上下立体瓦斯抽采模式,采用地面采动井抽采和定向长钻孔拦截抽采相结合的主要技术及斜交钻孔、普通高位钻孔、老空埋管的辅助措施。结果表明,地面钻井抽采开始卸压增长期瓦斯抽采量显著增加,当工作面推进至各钻井1~30 m时,瓦斯抽采量达到峰值状态;充分卸压抽采高峰期始于工作面推进过各钻井1~31 m;井间竞争抽采衰减期原钻井的瓦斯抽采量显著降低;卸压恢复低流量期的地面钻井抽采量为2~3 m^(3)/min。定向长钻孔抽采瓦斯经历逐渐增加、保持稳定、衰减的过程,钻孔末端进入卸压范围后,开始卸压瓦斯的拦截抽采,之后瓦斯抽采量逐渐提升,保持相对稳定,平均抽采量11.0 m^(3)/min。通过该模式,Ⅲ1022工作面上覆8、9煤层的瓦斯含量由15.8 m^(3)/t降低至4.52 m^(3)/t。工作面推采过程中的风排瓦斯量为0.47 m^(3)/min左右,有效保障了矿井安全生产。The geological conditions of Luling Coal Mine are complex,and the main coal seams are coal and gas outburst coal seams.Gas disasters are severe,and the difficulty of management is high.In order to solve the problem of gas control in extra-thick,broken,soft,and strong outburst coal seams,a three-dimensional gas extraction mode above and below the well was implemented.The main technology combining surface mining well extraction and directional long drilling interception extraction was adopted,as well as auxiliary measures such as oblique drilling,ordinary high-level drilling,and buried pipes in goafs.The results showed that the gas extraction volume significantly increased during the pressure relief growth period of surface drilling and extraction.When the working face advanced to 1-30 m of each drilling well,the gas extraction volume reached its peak state;the peak period of fully depressurization and extraction begins with the advancement of the working face through each drilling well for 1-31 m;during the decay period of inter well competition for gas extraction,the gas extraction volume of the original drilling significantly decreased;the surface drilling extraction volume during the period of pressure relief and low flow recovery is between 2-3 m^(3)/min.Directional long drilling gas extraction undergoes a process of gradually increasing,maintaining stability,and decay.After entering the pressure relief range at the end of the drilling,the interception and extraction of pressure relief gas begin.Afterwards,the volume of gas extraction gradually increases and remains relatively stable,with an average extraction volume 11.0 m^(3)/min.Through this mode,the gas content of the overlying No.8 and No.9 coal seams of theⅢ1022 working face decreased from 15.8 m^(3)/t to 4.52 m^(3)/t.The amount of gas discharged during the pushing and mining process of the working face is about 0.47 m^(3)/min,effectively ensuring the safety production of the mine.

关 键 词：瓦斯立体抽采 特厚碎软强突煤层 瓦斯治理 地面采动井抽采 定向长钻孔拦截抽采 

分 类 号：P618[天文地球—矿床学] TD713[天文地球—地质学]