晋平煤业高瓦斯综放工作面瓦斯抽采技术体系

Gas Drainage Technology System of High Gas Fully Mechanized Top Coal Caving Face in Jinping Coal Industry

以晋平煤业107采区为工程背景,分析了107采区瓦斯赋存规律,建立了高位钻孔抽采技术、顺层钻孔抽采技术以及边掘边抽技术联合的高瓦斯综放工作面瓦斯抽采技术体系。结果表明:107采区3号煤层的瓦斯含量增长梯度为2.56 m^(3)/(t·hm),瓦斯含量最大为11.59 m^(3)/t;采用联合瓦斯抽采技术体系条件下的回风隅角瓦斯浓度保持在0.48%~0.68%,回采工作面回风流瓦斯浓度稳定在0.25%~0.46%,掘进工作面回风流瓦斯浓度稳定在0.18%~0.39%。

Taking the 107 mining area of Jinping Coal Industry as the engineering background, the law of gas occurrence in the 107 mining area is analyzed, and the gas drainage technology system of high gas fully mechanized top coal caving face with the combination of high level drilling technology, bedding drilling technology and side excavation while drainage technology is established. The results show that the gas content growth gradient of the No. 3 coal seam in the 107 th mining area is 2.56 m^(3)/(t ·hm), and the maximum gas content is 11.59 m^(3)/t, under the condition of the combined gas drainage technology system, the gas concentration in the return air corner is kept at 0.48%-0.68%, the return air gas concentration in the mining face is stable at 0.25%-0.46%, and the return air gas concentration in the heading face is stable at 0.18%-0.39%.