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首先概括了我国地勘瓦斯含量测定方法的发展历程和应用效果,继而详述了地勘钻孔瓦斯解吸法的技术原理及存在的问题。指出地勘解吸法含量测值普遍偏低的主要原因在于目前使用的取芯过程中煤样损失量补偿方法不尽合理,并基于此提出了推广绳索取芯、保压取芯、完善取样过程煤芯损失瓦斯量推算方法和补偿游离瓦斯量等减少含量测值误差的技术对策。
First of all, the development history and application effect of the method for determining the gas content in the geological prospecting in China are summarized. Then the technical principle and existing problems of the methane desorption method in the geological exploration and drilling are described in detail. It is pointed out that the main reason why the measured value of geospatial desorption method is generally low is that the compensation method of coal sample loss during the current coring process is not reasonable. Based on this, it is proposed to promote rope coring, Technical Measures for Estimating the Losses of Content Measured by Calculating the Amount of Losses Caused by Coal Core Loss and Compensating the Amount of Free.