Citation: | CUI Yongle. Study on mechanism and control of abnormal gas emission in rock burst coal seam[J]. CHINA MINING MAGAZINE, 2023, 32(5): 104-109. DOI: 10.12075/j.issn.1004-4051.2023.05.016 |
Aiming at the problem of controlling abnormal gas emission in the mining process of rock burst coal seam,the influencing factors,causes and control methods of abnormal gas emission in rock burst coal seam are analyzed by theoretical analysis combined with field investigation.The results show that the influencing factors of abnormal gas emission in rock burst coal seam mainly include five aspects which natural impact physical attribute factors of coal rock,structural factors of coal rock mass,stress factors and gas factors.The causes of abnormal gas emission in the mining process of rock burst coal seam are as follows under the influence of mining,the stress concentration area of coal rock mass is suddenly unloaded,permeability increases,gas desorption expansion occurs,and abnormal emission occurs.The prevention and control ways of abnormal gas emission in rock burst coal seam can be adopted to reduce the risk of abnormal gas emission in rock burst coal seam by cutting off the roof ahead of time,large-area drilling pressure relief,coal seam blasting pressure relief,regional gas pre-pumping,strengthening local gas extraction and other measures.The research results are put into practice in a mine I010203 working face,and the treatment effect is good,which can provide reference for the prevention and control of abnormal gas emission under similar conditions.