钻孔风排钻屑法测试煤层瓦斯含量

摘要

For the traditional method of underground direct determining seam gas content, due to the limit of coring technology, the ex- posure time of samples is longer and affecting the accuracy of determination. The test of the method of determining coal seam gas con- tent by drilling bits shows that this method can reduce the exposure time of samples and increase the accuracy of determining results.%基于传统井下煤层瓦斯含量直接测定法实际应用中受取芯操作工艺制约,样品暴露时间较长,影响测试结果的准确性,提出了钻孔风排钻屑煤层瓦斯含量测试方法,在不同地区的对比试验结果显示,风排法显著缩短煤样暴露时间,减少了损失气量计算误差,为研究煤层瓦斯含量井下直接测试方法进行了有意的探索。