煤样暴露时间对瓦斯含量测定的影响分析  

Analysis of the Influence of Coal Sample Exposure Time on Gas Content Testing

作　　者：王靖飞 Wang Jingfei(Zhangcun Colliery,Shanxi Lu'an Group,Changzhi,Shanxi 046000)

机构地区：[1]潞安集团漳村煤矿,山西长治046000

出　　处：《江西煤炭科技》2020年第3期169-171,共3页Jiangxi Coal Science & Technology

摘　　要：本文分析探讨煤层瓦斯含量测定方法的优缺点;对煤矿瓦斯含量的准确测定十分重要,其中煤样暴露时间是影响测试结果准确性的关键因素;以直接测定法中的井下钻孔瓦斯解吸法,探讨不同暴露时间对测试结果的影响;试验结果表明:(1)暴露时间越长,煤样累计解吸量越少,初始解析速率越小,瓦斯损失量越大;(2)随暴露时间的增加,损失量误差先减小后增大,且暴露时间为2 min时误差最小;推算瓦斯损失量的修正公式,为煤矿瓦斯含量测定提供一定参考。The article analyzes and discusses the advantages and disadvantages of the method for measuring the gas content of coal seams,which is very important to accurately measure the gas content of coal mines,and the exposure time of coal samples is a key factor affecting the accuracy of the test results.The gas desorption method of downhole drilling in the direct measurement method is used to explore the influence of different exposure times on the test results,test results show that:(1)The longer the exposure time,the less the cumulative desorption amount of coal samples,and the lower the initial resolution rate,the greater the amount of gas loss;(2)With the increase of exposure time,the loss error first decreases and then increases,and the error is the smallest when the exposure time is 2 min,the correction formula for estimating gas loss provides a certain reference for the measurement of gas content in coal mines.

关 键 词：瓦斯含量测定 直接测试法 瓦斯损失量 相对误差 

分 类 号：TD712.2[矿业工程—矿井通风与安全]