煤与瓦斯突出煤层CO_2相变致裂增透技术试验研究  

Experimental Study on Permeability Increasing Technique with CO_2 Phase Transition Fracturing in Coal and Gas Outburst Coal Seam

作　　者：邹永洺 ZOU Yongming(1. China Coal Technology and Engineering Group Shenyang Research Institute, Fushun 113122, China;2.State Key Laboratory of Coo] Safety Technology, Fushun 113122, Chin)

机构地区：[1]煤科集团沈阳研究院有限公司,辽宁抚顺113122 [2]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《煤矿安全》2018年第3期5-8,共4页Safety in Coal Mines

基　　金：中国煤炭科工集团有限公司科技创新基金资助项目(2014QN006);"十三五"国家科技重大专项资助项目(2016ZX05067004-003)

摘　　要：针对车集煤矿煤层瓦斯压力较高、透气性差、瓦斯预抽难度大等问题,提出了在二_2煤层进行CO_2相变致裂增透技术试验。进行了CO_2相变致裂技术原理和CO_2致裂装置研究,设计了CO_2相变致裂增透影响半径试验方案和CO_2相变致裂增透瓦斯抽采效果试验方案。现场试验结果表明,本次CO_2相变致裂增透试验的影响半径为4 m;在观测的15 d内,致裂组的平均瓦斯抽采流量为普通抽采组平均瓦斯抽采流量的1.7倍。According to the problems of the high gas pressure, the low permeability, the difficult gas pre-drainage at Cheji Coal Mine, the permeability increasing technique tests by CO_2 phase transition fracturing were carried out in the Ⅱ_2 coal seam. The technical principle of CO_2 phase transition fracturing and CO_2 phase transition fracturing device were studied, the influence radius testing programs and the gas extraction effect testing programs of CO_2 phase transition fracturing technique were designed. The field tests showed that, the radius of influence of CO_2 phase transition fracturing test was 4 m, and the average gas extraction flow of the fracturing group was 1.7 times that of the normal extraction group in 15 d.

关 键 词：CO2相变致裂 煤层增透 影响半径 抽采效果 瓦斯抽采 

分 类 号：TD713[矿业工程—矿井通风与安全]