含水煤体钻屑瓦斯解吸指标K_1值的临界值研究  

Study on Critical Value of Gas Desorption Index K_1 of Drilling Cuttings in Water-contained Coal

作　　者：孙锐 SUN Rui(State Key Laboratory of The Gas Disaster Detecting, Preventing and Emergency Controlling, Chongqing 400037,China;China Coal Technology and Engineering Group Chongqing Research institute, Chongqing 400037, China)

机构地区：[1]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [2]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《沈阳理工大学学报》2018年第2期73-77,共5页Journal of Shenyang Ligong University

基　　金：国家科技重大项目(2016ZX05067004-001);国家自然科学基金资助项目(51304237)

摘　　要：研究采取水力压裂措施后含水煤体钻屑瓦斯解吸指标K_1值随水分的变化规律,得出不同水分下K_1值的临界值。在实验室采用模拟测试的方法对新景矿3号煤层不同水分煤样的瓦斯解吸规律和K_1-p关系进行实验测试。试验结果表明,水能够抑制煤样瓦斯的解吸,钻屑瓦斯解吸指标K_1值随瓦斯压力增大呈幂函数关系增大,随煤样水分增大呈负指数函数关系减小。研究表明,采用实验模拟得出临界压力下K_1值与水分的关系函数,可对采取水力化措施后煤层钻屑瓦斯解吸指标K_1值的临界值进行修正。In order to study the change lawof gas desorption index K1 of drilling cuttings with moisture after taking hydraulic fracturing measures,the critical value of index K1 under different moisture was obtained. Experiment and test using simulation tests was done to gas desorption lawand relation of K1-p under the condition of different moistures for No 3 seam in Xinjing Mine in laboratory. The result shows that water has a restrain effect on gas desorption of coal,gas desorption index K1 of drilling cuttings increases with the increase of gas pressure in a power function relationship,as the moistures of the coal sample increases,the negative exponential function decreases. According to the condition of this research,through the experimental simulation,the relationship between index K1 and the moisture under critical pressure can be used to correct the critical value of index K1 of drill cuttings after the adoption of hydraulic measures.

关 键 词：含水煤体 K1-p关系 钻屑瓦斯解吸指标K1值 临界值 

分 类 号：TD712[矿业工程—矿井通风与安全]