超高压水力割缝和CO_(2)相变致裂联合增透技术研究与应用  

Combined permeability-enhancing technology of ultra-high pressure hydraulic cutting and CO_(2) phase change cracking

作　　者：秦江涛[1] 陈婧[1] 谢文波 张从国 QIN Jiang-tao;CHEN Jing;XIE Wen-bo;ZHANG Cong-guo(Chongqing Vocational Institute of Engineering,Chongqing 402260,China;Sichuan South Sichuan Coal Industry Co.,Ltd.,Junlian 615251,China)

机构地区：[1]重庆工程职业技术学院,重庆402260 [2]四川省川南煤业有限责任公司,四川筠连615251

出　　处：《煤炭工程》2021年第9期61-65,共5页Coal Engineering

基　　金：国家自然科学基金项目(51204217);重庆市教委科学技术研究项目(KJQN201803405);重庆工程职业技术学院院级课题(KJB201908)。

摘　　要：针对鲁班山北矿14采区8^(#)煤层地质构造复杂、瓦斯抽采难的问题,提出了超高压水力割缝和CO_(2)相变致裂联合增透技术,并分析其泄压增透原理,同时进行了不同增透方案条件下的现场抽采效果对比试验。结果表明,该联合增透方案的平均单孔瓦斯体积分数分别是普通抽采和超高水力割缝的1.79倍和1.20倍;单孔瓦斯抽采平均纯量分别是普通抽采和超高压水力割缝的3.2倍和1.9倍,90d抽采时间瓦斯抽采影响半径分别是普通抽采和超高压水力割缝的4.58倍和1.38倍,在同等条件下施工钻孔时间分别比普通抽采和超高压水力割缝缩短50.5%和40.6%,瓦斯达标抽采时间分别比普通抽采和超高压水力割缝缩短了66.7%和50%。相较于常规治理技术方案,超高压水力割缝和CO_(2)相变致裂联合增透技术对瓦斯灾害治理的应用效果更为理想。Aiming at the complex geological structure of No.8 coal seam in No.14 mining area of north Lubanshan Coal Mine and the problems of poor gas permeability, the combined permeability-enhancing technology of ultra-high pressure hydraulic cutting and CO_(2) phase change cracking is proposed. And its pressure relief and permeability-enhancing principle is analyzed, the extraction effects under different permeability-enhancing schemes are compared. The results show that, the average volume fraction of single-hole gas in the scheme is 1.79 times and 1.20 times of conventional technologies(ordinary extraction and ultra-high hydraulic cutting),respectively. And the average pure volume of single-hole gas extraction is 3.2 times and 1.9 times, the influence radius of gas extraction is 4.58 times and 1.38 times of that in conventional technologies. Under the same conditions, the drilling time is 50.5% and 40.6% shorter, and the gas extraction time is 66.7% and 50% shorter than that of conventional technologies. Compared to conventional technologies, the combined permeability-enhancing technology of ultra-high pressure hydraulic cutting and CO_(2) phase change cracking is better for gas control.

关 键 词：超高压水力割缝 CO_(2)相变致裂 联合增透技术 瓦斯灾害 

分 类 号：TD712.6[矿业工程—矿井通风与安全]