Application research on high gas extraction technology in goaf
Chen Deshan 1, Zhang Jianjiang 2, Yang Wanxin 1
1. College of Resource and Environmental Engineering, Lanzhou Petrochemical Polytechnic University, Lanzhou 730207,China; 2. Jingyuan Coal Group Weijiadi Mine, Baiyin 730913, China
Abstract: During the mining process of the north 1103 working face of Weijiadi Coal Mine, the gas in the goaf will flood into the working face in large quantities, causing the gas in the upper corner and the return airway to exceed the limit. In order to control the gas in the goaf, the drilling parameters were calculated and the layout scheme was designed. The No.1 and No.2 drilling fields were successively excavated in the return air roadway of the north 1103 working face, and the high-level gas drilling was used to carry out the gas drainage operation and monitor and analyze the gas changes in the upper corner and the return air roadway. The results show that during the extraction of No.1 drilling field, the average gas concentration in the upper corner of the working face is 0.48 %, and the average gas concentration in the return airway is 0.25 %. During the extraction of No.2 drilling field, the average gas concentration in the upper corner of the working face is 0.37 %, and the gas concentration in the return airway is 0.22 %. The average gas concentration is below 0.5 %, and there is no gas overrun. The gas extraction effect is remarkable. The treatment method and design can provide reference for related engineering projects.
陈德山1,张建江2,杨婉欣1. 采空区高位瓦斯抽采技术应用研究[J]. 煤炭与化工, 2023, 46(10): 141-146.
Chen Deshan 1, Zhang Jianjiang 2, Yang Wanxin 1 . Application research on high gas extraction technology in goaf . CCI, 2023, 46(10): 141-146.