煤矿工作面瓦斯流动时空关系研究  

Study on space-time relationship of gas flowin working face of coal mine

作　　者：梅勇 Mei Yong(Chongqing Research Institute Co.,Ltd.,Chongqing 400000,China;State Key Laboratory of Gas Disaster Monitoring and Emergency Technology,Chongqing 400000,China)

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400000 [2]瓦斯灾害监控与应急技术国家重点实验室,重庆400000

出　　处：《煤炭与化工》2024年第8期112-115,121,共5页Coal and Chemical Industry

摘　　要：为了探究祁东煤矿工作面瓦斯涌出量的预测和瓦斯流动时空关系,提高煤矿安全生产水平。本文首先通过瓦斯实验参数、煤层赋存和工作面布置等信息,预测计算保护层开采工作面的瓦斯涌出量,并分析了邻近层的瓦斯涌出情况;其次,结合覆岩破坏形成的“O”型圈瓦斯运移通道,探究了瓦斯阻力的沿倾向和走向分布规律,揭示了瓦斯向上均匀流动的特性;最后,通过研究保护层工作面煤层瓦斯抽采时空关系,发现在工作面前方8 m至后方55 m区间的瓦斯抽采浓度和流量较大,进行穿层钻孔瓦斯抽采是最佳选择。研究结果为祁东煤矿瓦斯管理和安全生产提供了参考,具有一定的理论和实际意义。In order to explore the prediction of gas emission and the space-time relationship of gas flow in Qidong coal mine working face,so as to improve the level of coal mine safety production.In this paper,firstly,through the laboratory gas experimental parameters,coal seam occurrence and working face layout and other information,the gas emission amount of the protective layer mining working face is predicted and calculated,and the gas emission situation of the adjacent layer is analyzed.Secondly,combined with the'O'type circle gas migration channel formed by overburden failure,the distribution law of gas resistance along the tendency and strike is explored,and the characteristics of gas upward uniform flow are revealed.Finally,by studying the space-time relationship of coal seam gas extraction in the protective layer working face,it is found that the gas extraction concentration and flow rate in the range of 8 m in front of the working face to 55 m behind the working face are large,and the gas extraction of cross-layer drilling is the best choice.The research results provide a certain reference for Qidong coal mine gas management and safety production,and have certain theoretical and practical significance.

关 键 词：瓦斯涌出 煤层抽采 瓦斯运移通道 时空关系 

分 类 号：TD712[矿业工程—矿井通风与安全]