为降低高瓦斯掘进工作面掘进期间的突出危险性,增大煤层透气性,余吾煤业公司引进了CO2气相压裂增透消突技术,主要通过在工作面施工的压裂钻孔进行爆破增透。在原先单孔预裂的基础上,通过施工控制孔进行了控制预裂试验。试验证明,控制预裂对煤层的防突指标、瓦斯涌出均匀性及钻孔瓦斯抽采量都产生了良好的效果。 In order to reduce the outstanding danger during the tunneling of high-gas heading face and increase the gas permeability of the coal seam, Yuwu Coal Company introduced CO2 gas-phase fracturing to enhance penetration and elimination of fractures, mainly through the fracturing of the borehole through. On the basis of the original single-hole pre-cracking, the control pre-cracking test was conducted through the construction control hole. Experiments show that the control of pre-cracking of the coal outburst indicators, gas emission uniformity and borehole gas drainage have produced good results.