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Experimental Study on Inhibitory Effect of Gas Desorption by Injecting Water into Coal-sample

机译:将水注入煤样气体解吸抑制作用的实验研究

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In order to further study inhibitory effect of gas desorption in coal seam water infusion, the laboratory test method is used in this paper, which experiments on coal sample that is fully adsorbed methane before being injected water into. By the experiments, gas desorption isotherms, gas desorption rate and residual gas content after water injection are obtained. And also, the following test results are got: the first, with water being injected, coal gas desorption isotherms moves upward, that is, gas content in coal sample increases under a certain balance pressure; the second, with water being injected, it can lower both the initial desorption rate and the attenuation speed of gas adsorption in coal sample, that is, coal gas desorption rate curve becomes more smooth; the third, with water being injected, it increases residual gas content in coal, and residual gas content increases with injection pressure and water content. Through these experiments, the following conclusions can be drawn: with high pressure water being injected into pores of coal, residual water in coal has inhibitory effect to adsorption methane, ultimately, reducing gas desorption rate and desorption volume; so that, water injection is benefit for gas outburst, and the inhibitory effect is an important role in mechanism of water injection to prevent coal and gas outburst.
机译:为了进一步研究气体解吸在煤层水输注中的抑制作用,本文使用了实验室试验方法,该试验在注入水进入之前在煤样上完全吸附的甲烷。通过实验,获得水注射后的气体解吸等温,气体解吸速率和残留气体含量。此外,以下测试结果得到:首先,用水注入水,煤气解吸等温线向上移动,即煤样中的气体含量在一定的平衡压力下增加;第二种,用水注射,它可以降低初始解吸速率和煤样中气体吸附的衰减速度,即煤气解吸速率曲线变得更加光滑;第三,用水注入水,它增加了煤中的残留气体含量,并且残留的气体含量随注射压力和含水量增加。通过这些实验,可以绘制以下结论:用高压水注入煤的孔中,煤中的残留水对吸附甲烷具有抑制作用,最终降低了气体解吸速率和解吸体积;因此,注水是瓦斯爆发的益处,抑制作用是注水机制中的重要作用,以防止煤气爆发。

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