摘要
区域瓦斯抽采效果检验是"四位一体"综合防突工作的重要一环,寺河矿采用残余瓦斯含量作为预抽煤巷条带瓦斯区域防突措施效果检验指标,采用常规取心测定瓦斯含量分段评价瓦斯抽采效果,该效检方法存在评价范围小、检验点轨迹偏差大、掘进与效检交叉作业等问题。在研究煤矿井下煤层长距离密闭取心技术及工艺的基础上,提出了基于长距离密闭取心的煤巷条带瓦斯预抽效果快速检验方法,并选择东区工作面瓦斯预抽煤巷条带进行试验。根据寺河矿试验结果,长距离密闭取心测定煤层瓦斯含量为常规取心测值的1.26~1.71倍,煤巷条带瓦斯预抽一次效检范围由90 m扩大至390 m。研究表明,基于煤层长距离密闭取心的煤巷条带瓦斯预抽效检方法是可行的,该方法实现了煤层钻孔精准定点、长距离、密闭取心,提高瓦斯含量测定结果准确度,大幅扩大区域瓦斯预抽效果一次效检范围,减少掘进工作面生产与效检工作的交叉作业,促进了矿井生产"抽-掘-采"平衡。
Regional gas drainage effect test is an important part of the four in one comprehensive outburst prevention work.Sihe Coal Mine uses residual gas content as an indicator of the effectiveness of gas outburst prevention measures in pre-drainage roadways,and uses conventional coring to measure gas content to evaluate gas drainage effect by sections.The effectiveness test method has problems such as small evaluation range,large deviation of test point trajectory,and cross operation of tunneling and effectiveness inspection and so on.Based on the study of long-distance sealed coring technology in underground Coal Mine,a fast test method for gas pre-drainage effect of coal roadway strip based on long-distance sealed coring is proposed,and the gas pre-drainage coal road strip in eastern working face is selected for test.The test results of Sihe Coal Mine show that the gas content measured by long-distance sealed coring is 1.26~1.71 times of that measured by conventional coring,and the range of one-time efficiency verification of strip gas pre drainage in coal roadway is expanded from 90 m to 390 m.The research shows that the efficiency verification method of strip gas pre drainage in coal roadway based on long-distance sealed coring is feasible.This method realizes accurate fixed-point,long-distance and sealed coring of coal seam drilling,improves the accuracy of gas content measurement results,greatly expands the one-time evaluation range of regional gas pre drainage effect,reduces the cross operation of production and effective detection in heading face,and promotes the balance of"pumping,driving and mining"in mine production.
作者
冯强
龙威成
李振福
孙四清
FENG Qiang;LONG Weicheng;LI Zhenfu;SUN Siqing(Jinneng Holding Group Corporation Limited,Jincheng 048000,China;Xi’an Research Institute,China Coal Technology&Engineering Group Corp.,Xi’an 710077,China)
出处
《煤炭科学技术》
CAS
CSCD
北大核心
2021年第3期106-111,共6页
Coal Science and Technology
基金
天地科技股份有限公司科技创新创业资金专项资助项目(2020-TD-MS010)。
关键词
煤巷条带
预抽瓦斯
效检方法
密闭取心
瓦斯含量
strip of coal roadway
gas pre-drainage
efficiency verification method
sealed coring
gas content
