基于短孔快速抽采的低透煤层煤巷掘进技术  

Coal Roadway Driving Technology in Low Permeability Coal Seam Based on Short Hole Rapid Drainage

作　　者：向真才 XIANG Zhencai(State Key Laboratory of Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400037,China;China Coal Technology and Engineering Group Chongqing Research Institute,Chongqing 400037,China)

机构地区：[1]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [2]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《煤矿安全》2020年第4期97-100,共4页Safety in Coal Mines

基　　金：“十三五”国家科技重大专项资助项目(2016ZX05067-004-004)。

摘　　要：针对煤层透气性差、钻孔瓦斯流量衰减较快、采取迎头超前长钻孔抽采效果不佳而导致煤巷掘进速度慢等问题,提出利用检修班时间采用短钻孔进行掘进迎头快速集中抽采,通过短时间、高强度抽采小范围瓦斯,减小通风压力,提高煤巷掘进速度的新思路。通过在霍尔辛赫煤矿3605回风巷应用表明,在检修班采用短钻孔快速抽采工艺,在回风流与工作面瓦斯浓度降低20%的前提下,工作面月进尺提升50%,实现了对低透气性煤层煤巷工作面瓦斯的有效治理。Aiming at the problems of poor permeability of coal seam, fast attenuation of gas flow in boreholes, poor effect of long boreholes in advance and slow driving speed of coal roadway, a new idea is proposed that short boreholes should be used for rapid centralized mining in front of coal roadway in overhaul shift time, and small-scale gas should be extracted in short time and high strength to reduce ventilation pressure and improve driving speed of coal roadway. Through the application of 3605 return air roadway in Huoerxinhe Coal Mine, it is shown that under the premise of 20% reduction of return air flow and gas concentration in working face, the monthly advance footage of working face is increased by 50%. The effective control of gas in low permeability coal seam roadway is realized.

关 键 词：低透气性 抽采效果 短钻孔 快速抽采 流量衰减 

分 类 号：TD712[矿业工程—矿井通风与安全]