一种取煤样方法的可行性验证  

Verification on Feasibility of an Experimental Coal Sampling

作　　者：邓光平 谢策[2] 

机构地区：[1]平煤股份十三矿,河南平顶山467000 [2]河南理工大学,河南焦作454000

出　　处：《中州煤炭》2015年第5期7-9,84,共4页Zhongzhou Coal

基　　金：国家自然科学基金(51274090)

摘　　要：针对井下实际测定煤层瓦斯含量的取样过程中瓦斯损失量过多致使测量结果不准确的问题,提出低温(0℃以下)取煤样方法,这种方法能够减少损失量,使煤层瓦斯含量的测定尽可能准确。实验结果表明:随着温度降低,煤对瓦斯的吸附性增强;低温下瓦斯更难从煤体中解吸出来,相同取样时间内瓦斯损失量减少,当温度恢复到原来温度之后,吸附量相差最大为0.088 9 cm3/g,从而证明了低温取煤样方法的可行性。According to the problem that the coal seam gas content determination is often inaccurate due to the excessive loss of the un- derground sampling,freezing coal sampling was proposed to reduce losses of the adsorbed methane and ensure the accuracy of the gas content of the determination value. The experiment results show that,at low temperature（0 ℃ below） ,the coal gas adsorption capacity increases,gas desorbing from the coal becomes harder at low temperature than that at room temperature,reducing the loss of gas during the same sampling time;when the temperature returns to its original temperature, the maximum adsorption amount between it is 0. 088 9 cm^3/g,thus proving the feasibility of coal sampling in low temperature.

关 键 词：低温取煤样 吸附量 解吸 煤层瓦斯含量 

分 类 号：TD712[矿业工程—矿井通风与安全]