官地矿22613工作面CO_2预裂增透瓦斯抽采技术研究

Study on CO_2 pre-cracking and anti-reflection technology of 22613 working face of Guandi Mine

针对官地矿中六采区22613工作面高瓦斯低渗透、瓦斯抽采困难的情况,提出了利用CO_2预裂增透技术提高瓦斯抽采效率。通过现场的实践表明,CO_2预裂孔布置间距为8 m时抽采效果最好,CO_2预裂措施使得煤层平均单孔瓦斯抽采体积分数增加了1.2倍,在抽采后期也有较高的瓦斯抽采量,取得了良好的抽采效果,值得进一步推广。

In view of the high gas and low permeability and difficult gas drainage in the 22613 working face of No.6 mining areas in Guandi Mine,the CO2 pre-cracking and anti-reflection technology was proposed to improve the gas drainage efficiency.The field practice showed that the CO2 pre-cracking hole arrangement was 8 m,the best extraction effect was achieved.The CO2 pre-cracking measures increased the average single-hole gas drainage volume fraction of the coal seam by 1.2 times,with higher gas drainage in the later stage of the extraction.The mining volume achieved good drainage results and deserved further promotion.