Gas Prevention and Control Technology in Coal Thickness Variation Zones during Excavation of High Gas Mines
The 1206 belt gateway of Longwangzhuang Coal Mine is excavated using a fully mechanized excavation method,and there is a thickness variation zone of the No.Ⅱ1 coal seam in the excavation area,which leads to significant gas prevention and control pressure in the roadway excavation.Based on the on-site situation of the 1206 belt gateway,in order to prevent gas exceeding the limit and other gas accidents during the excavation of the belt gateway in the coal thickness change zone,a comprehensive prevention and control of gas was carried out by adopting multiple measures such as regional prediction,deep hole extraction,continuous area verification,and shallow hole extraction,ensuring the safe construction of the excavation face.After on-site application,the 1206 belt gateway maintained safe and efficient excavation of the roadway,without any signs of abnormal gas emission or gas outburst,achieving good gas prevention and control effects.
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万方数据
维普
