Analysis on Comprehensive Mining Face Directional More Than 1 000 m Drilling Pre-drainage Coal Seam Gas Application Effect
ZHANG Hong-bo1,2, YANG Dong3,4
1. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; 2. Shanxi Changzhi Xiangyuan Coal Industry Management Bureau, Changzhi 046200, China; 3. National Key Laboratory of Coal Mine Safety Technology, Fushun 113122, China; 4. Shenyang Research Institute Corporation Ltd., China Coal Technology Group, Shenyang 110016, China
Based on large gas emission of high burst mine mining working face, long pre-drainage of normal drilling and slow mining, technology of directional more than 1 000 m drilling pre-drainage roadway mining working face gas was adopted. By monitoring and contrast of gas drainage effect, the average drainage concentration of pre-drainage drilling sustained at 87% or so, single hole drainage scalar quantity achieved by 1.24 m3/min. Comparing with the normal drilling, the gas drainage quantity was 2 times larger under the same pre-drainage time, with low gas quantity and emission, the technology saved the pre-drainage time and improved the mining speed 1.5 times.
张红波，杨 东. 综掘面定向千米钻孔预抽煤层瓦斯应用效果分析[J]. 煤炭与化工, 2015, 38(11): 60-62.
ZHANG Hong-bo, YANG Dong. Analysis on Comprehensive Mining Face Directional More Than 1 000 m Drilling Pre-drainage Coal Seam Gas Application Effect. CCI, 2015, 38(11): 60-62.
