MOE Engineering and Research Center of Mine Disaster Prevention and Rescue, Henan Polytechnic University
School of Safety Engineering, China University of Mining and Technology

水力化措施在煤矿开采中广泛应用,为了研究注水对煤层瓦斯解吸的影响,采用高压吸附-注水-解吸测试装置对不同吸附平衡压力和水分条件下煤对瓦斯的置换解吸量、卸压解吸量及总瓦斯解吸量进行了测试计算。结果表明:注水过程中及注水一段时间内煤样罐瓦斯压力呈现出继续增高的趋势,说明注入的水置换出了煤体吸附的瓦斯,且水分越高,置换解吸量越大,测试的最大置换量可达11.88 mL/g;卸压后,注水煤样的瓦斯解吸量减小,且水分越大,瓦斯解吸量降幅越大,降幅最大值可达68.29%;注水后煤的总解吸量增大,说明注水对试验煤样的瓦斯解吸起促进作用。

Hydraulic measures were widely applied to the mining operation in the coal mine. In order to study a water injection affected to the seam gas desorption, a high pressure adsorption-water injection-desorption measuring and test device was applied to the measuring and test calculation on the coal to gas replacement deso rption value, pressure released desorption value and total gas desorption value under the condition of different adsorption balanced pressure and water content. The re sults showed that in the water injection process and within a period of time of the water injection, the gas pressure in the coal sample cylinder was in a continuously inc reasing tendency which could explain the injected water replaced the coal adsorbed gas. The higher water content was and the higher replaced desorption value would be.The max replaced value measured would be 11. 88 mL /g. After the pressure released, the gas desorption value of the water injected coal sample would be reduced. The higher water content was and the higher gas desorption value would highly reduced. The max reduction could be 68. 29%. After the water injection conducted, the t otal desorption value of the coal would be increased and thus the water injection could play a promotion role of the coal gas desorption.

国家自然科学基金资助项目(51074160,51174081,51204065)；河南省科技攻关资助项目(122102310564)；中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室开放基金资助项目(GFCKF201106)；