钻屑瓦斯解吸指标临界值实验研究  

Experimental Study of Gas Desorption Index Critical Value of Drilling Cuttings

作　　者：贾东旭[1,2] 

机构地区：[1]煤炭科学研究总院矿山安全技术研究分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室,北京100013

出　　处：《煤矿安全》2013年第8期4-7,共4页Safety in Coal Mines

基　　金：国家科技重大专项资助项目(2011ZX05040-001;2011ZX05063-009);国家重点基础研究发展计划(973计划)资助项目(2011CB201206)

摘　　要：针对钻屑瓦斯解吸指标临界值选取不合理、现场又难以考察的问题,在实验室测试了不同压力下钻屑瓦斯解吸指标K1,测试结果表明:钻屑瓦斯解吸指标随瓦斯压力的改变呈现出幂函数式变化,最小突出瓦斯压力下,煤的坚固性系数越小,钻屑瓦斯解吸指标越大;钻屑瓦斯解吸指标临界域为[0.62,0.76]。采用"三率"法对0.6 mL/(g.min1/2)作为3#煤层瓦斯解吸指标临界值进行了验证,结果表明0.6 mL/(g.min1/2)作为3#煤层瓦斯解吸指标临界值是合理的。Aiming at the problems of unreasonable selection of gas desorption index critical value of drilling cuttings and its difficult confirmation in the field,the gas desorption indexes of drilling cuttings were tested under different gas adsorption pressure in the lab.The test results show that the gas desorption indexes of drilling cuttings present variation of power function type with the changes of gas pressure.Under the minimum outburst gas pressure,the lower the firmness coefficient of coal is,the higher the gas desorption index of drilling cuttings is.And,the gas desorption index critical region of drilling cuttings is [0.62,0.76].With three rate method,the gas desorption index critical value of drilling cuttings of No.3 coal seam was tested and verified.The results indicate that it is reasonable that the gas desorption index critical value of drilling cuttings is 0.6 mL/（g·min1/2）.

关 键 词：突出危险性预测 钻屑瓦斯解吸指标 三率法 临界值 始突瓦斯压力 

分 类 号：TD712.6[矿业工程—矿井通风与安全]