新型煤层瓦斯含量准确测定方法研究

Newly Deveolped Method for Exact Measurement of Gas Content

为了更准确的测定煤层瓦斯含量,提出了新型煤层瓦斯含量测定原理,根据煤芯瓦斯总量守恒,从理论上对取芯前的煤芯瓦斯漏失量进行分析,采用新型煤层瓦斯含量准确测定取芯仪器进行取芯实验,并测定瓦斯含量.结果表明,取芯前的煤芯瓦斯漏失量约占煤芯瓦斯含量的10%;取芯仪器既能取到比较完整的煤芯,也能实现密闭液对煤芯的包裹;与传统的工作面钻屑解吸法相比,新型煤层瓦斯含量准确测定法既能确保所取煤芯完全来自于钻孔前方,又能有效降低损失瓦斯量.因此,新方法的可靠性更高.

In order to exactly test the gas content,we propose the principle for the new method of testing coal gas.Then,the quantity of gas leakage before core drilling is theoretically analyzed based on the law of gas gross conservation in the coal core;Finally,by using the the core drilling equipment which is a part of the new type measurement instrument of coal gas content,we measure the gas content.The results show that the quantity of gas leakage accounts for about 10% of coal core gas content;the core drilling ...