高瓦斯低透气性单一厚煤层综放开采顶煤瓦斯治理技术研究  

Study on gas control technology of roof coal on fully-mechanized top coal caving in single thick seam with high gas and low permeability

作　　者：吴卫星 邓春生 Wu Weixing;Deng Chunsheng(Shaanxi Jinyuan Zhaoxian Mining Co.,Ltd.,Baoji 713500,China;Institute of Safety Engineering Technology and Equipment,Taiyuan University of Technology,Jinzhong 030600,China)

机构地区：[1]陕西金源招贤矿业有限公司,陕西宝鸡713500 [2]太原理工大学安全工程技术与装备研究院,山西晋中030600

出　　处：《能源与环保》2020年第5期27-30,35,共5页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

摘　　要：为解决高瓦斯特厚单一煤层在综放开采条件下顶板大面积来压时造成回采空间大面积瓦斯超限难题,运用岩石力学、流体力学、渗流力学等理论为支撑,采用Fluent数值模拟技术重点对回采空间上的顶煤内的卸压解吸瓦斯运移及浓度分布规律进行探讨研究,得出综放工作面充分卸压的顶煤与采空区浅部直接顶所围成的冒落未压实区域存在瓦斯积聚现象且浓度较高。针对顶煤瓦斯这一积聚规律,通过采用高位煤层钻孔抽采顶煤瓦斯技术,有效解决了采空区瓦斯突然涌出造成的瓦斯超限问题。In order to solve the problem of large-area gas over-limit in the mining space when a large area of the roof is pressed under the condition of fully-mechanized mining under the condition of high gas thickness and a single coal seam,this article was supported by the use of rock mechanics,fluid mechanics,seepage mechanics,using Fluent numerical simulation technology to focus on the gas movement and concentration distribution of pressure relief and desorption in top coal in the mining space.It was concluded that there is a phenomenon of gas accumulation and high concentration in the falling and uncompacted area surrounded by the fully decompressed top coal and the shallow top of the goaf.In view of the accumulation rule of top coal gas,the technology of top coal gas extraction by high seam drilling is adopted,which has effectively solved the problem of gas overrun caused by sudden gas emission in goaf.

关 键 词：单一厚煤层 采空区瓦斯涌出 数值模拟 顶煤瓦斯运移 

分 类 号：TD713[矿业工程—矿井通风与安全]