负压定点取样煤层瓦斯含量测定损失量推算方法

发布时间：2018-04-14 03:02

本文选题：定点取样 + 负压解吸　；参考：《中国矿业大学学报》2017年04期

【摘要】：为确定负压排渣定点取样过程的瓦斯损失量,采用自主研发的颗粒煤瓦斯负压-负压转常压解吸实验系统,选取义马矿区新安煤矿煤样,开展了不同吸附平衡压力、不同解吸负压及解吸时间的颗粒煤瓦斯负压-负压转常压解吸规律实验研究.结果表明:负压解吸段瓦斯累积解吸量随着解吸负压(绝对值)的升高及负压解吸时间的延长而增大,转为常压解吸后对应的瓦斯累积解吸量减小;实验煤样负压解吸初期(0~2min)瓦斯解吸规律及转为常压解吸后的常压解吸初期规律(0~10min)均可采用巴雷尔模型描述;基于提出的负压取样瓦斯损失量推算方法所得的推算值与实际损失量值最大误差为4.83%.
[Abstract]:In order to determine the amount of gas loss in the process of sampling at the fixed point of negative pressure slag discharge, the experimental system of particle coal gas negative pressure and negative pressure conversion to normal pressure desorption was developed, and different adsorption equilibrium pressures were carried out in Xinan coal mine of Yima mining area.Experimental study on the desorption law of granular coal gas from negative pressure to negative pressure to normal pressure with different desorption pressure and desorption time.The results show that the cumulative desorption amount of gas in the negative pressure desorption section increases with the increase of the desorption pressure (absolute value) and the prolongation of the desorption time of the negative pressure, and the corresponding cumulative desorption volume decreases after conversion to normal pressure desorption.Barrell model can be used to describe the law of gas desorption in the early stage of experimental coal desorption under negative pressure and the initial law of desorption under normal pressure after conversion to normal pressure desorption for 10 min.The maximum error between the calculated value and the actual loss value is 4.83 based on the proposed method for calculating the amount of gas loss from negative pressure sampling.
【作者单位】：河南理工大学河南省瓦斯地质与瓦斯治理省部共建国家重点实验室培育基地安全科学与工程学院河南省煤炭安全生产协同创新中心;
【基金】：国家自然科学基金项目(51404100,51574112) 教育部创新团队项目(IRT_16R22) 河南省科技创新杰出青年基金项目(164100510013)
【分类号】：TD712.3

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