2009•Coal science and technologyRequires access
Gas Comprehensive Control Technology of Coal Mining in Protected Seam
Jin Xia
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Abstract
According to the serious status of gas outburst danger in No.4 mine of Pingdingshan Coal Mining Group,a large power,large flow and large diameter pipeline gas drainage in No.4 Mine of Pingdingshan Coal Mining Group,U+L ventilation mode,tail gateway pipeline buried gas drainage technology,gas drainage technology with borehole in roof in strike,face to face inclined cross borehole drilling technology and other gas comprehensive technologies were applied to gas prevention and control.The results showed that when above measures applied,the gas pressure would be first increased and decreased with the mining distance and the pressure measured time.The gas quantity in protected seam would be increased for the safety rapid heading.