Practice of Outburst Prevention Technology for Uncovering No.2 Coal Seam in Donger Return Air Shaft of Weijiadi Coal Mine

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Zhang, Jufeng^1 ; Xu, Tai^1 ; Yang, Fengfeng^1 ; Zheng, Chao^1 ; Zhang, Jianjiang^2 ; Miao, Zaiquan^2

School of Energy Engineering, Longdong University, Qingyang

745000, China^1

Weijiadi Coal Mine, Jingyuan Coal Mine Industry Group, Baiyin

730913, China^2

关键词: Drilling process;    Four in ones;    Gas pressures;    Gas-dynamic phenomenon;    Outburst prevention measures;    Pre-construction;    Prevention technologies;    Safety protection;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/2/022026/pdf
DOI  :  10.1088/1755-1315/300/2/022026

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In Weijiadi Coal Mine, the No.2 coal seam is uncovered by the Donger return air shaft. According to the concept of "regional measures first, local measures supplement", the measures are taken strictly in the outburst seam, the gas pressure P=0.2MPa and the gas content W=1.4729m3/t in the coal seam are determined by preconstruction prediction drilling, and there are no gas dynamic phenomena such as drilling jam and sticking in the drilling process. It is proved that there is no outburst danger, and then it is implemented according to the local "four in one" outburst prevention measures. The maximum gas pressure determined is 0.2 MPa in the working face, and the validity check is still no outburst danger. Finally, safety protection devices are installed in the working face to ensure the No.2 coal seam to be uncovered smoothly by return air shaft.