摘要
通过CO_2预裂爆破使钻孔壁产生径向环形的破裂圈,这在增加了煤层透气性的同时,煤层中CO_2置换解吸CH_4,还促进了瓦斯抽采效果,依据寺家庄矿的实际突出特点,在寺家庄矿掘进工作面进行CO_2预裂爆破强化抽采技术试验。结果表明,爆破后钻孔瓦斯抽采量增加了65.5%,瓦斯抽采浓度也提高8%,经过强化抽采后,钻孔控制范围内的煤层瓦斯含量大幅度降低,掘进效率极大提高。
CO2 pre-split blasting borehole wall so that radial annular ring rupture, which increases the permeability of coal, while coal displacement desorption of CO2 CH4, also contributed to the effect of gas drainage. Based on the actual outstanding feature of Temple Village ore mine in the village temple be heading face Presplitting Blasting CO2 extraction technology trials. The results showed that after blasting gas drainage drilling increased by 65.5%, the concentration of gas extraction also increased by 8%. Hardened after extraction, coal seam gas content within the control of a significant reduction in drilling, tunneling efficiency greatly improved.
出处
《科技与创新》
2014年第1期6-8,共3页
Science and Technology & Innovation
关键词
CO2
预裂爆破
透气性
强化抽采
CO2
pre-split blasting
permeability
enhanced extraction
