瓦斯损失量补偿模型推算准确度的试验研究

发布时间：2018-07-05 18:19

本文选题：瓦斯损失量 + 补偿模型　；参考：《矿业安全与环保》2017年02期

【摘要】：针对直接解吸法测定煤层瓦斯含量过程中难以精准推算瓦斯损失量的难题,采用气体吸附测定仪与解吸仪相结合的方法,试验测定了煤样暴露过程中的瓦斯损失量,对比分析了地勘补偿模型和孙重旭补偿模型的推算精度。研究发现:对于同一煤样,瓦斯损失量与煤样暴露时间及块度有关,煤样块度越大,瓦斯损失量越小,当块度大到一定程度后,瓦斯损失量增加幅度不再明显;与实测的煤层瓦斯损失量相比,孙重旭补偿模型对瓦斯损失量的补偿效果要优于地勘补偿模型,煤样暴露时间越短,瓦斯损失量的推算精度越高。当煤样块度小于等于20 mm时,其暴露时间应小于20 min;当煤样块度大于20 mm时,其暴露时间应小于30 min。
[Abstract]:In order to solve the problem that it is difficult to accurately calculate the amount of gas loss in the determination of coal seam gas content by direct desorption method, the gas loss amount in the process of coal sample exposure is measured by the method of gas adsorption and desorption instrument. The calculation accuracy of geological prospecting compensation model and Sun Chongxu compensation model is compared and analyzed. It is found that: for the same coal sample, the amount of gas loss is related to the exposure time and block size of the coal sample. The larger the coal sample size is, the smaller the gas loss amount is, and when the coal sample size reaches a certain degree, the increase of gas loss is no longer obvious. Compared with the measured coal seam gas loss, the compensation effect of Sun Chongxu compensation model is better than that of geological prospecting compensation model. The shorter the exposure time of coal sample is, the higher the accuracy of calculating gas loss is. When the size of coal sample is less than or equal to 20 mm, the exposure time should be less than 20 min, and when the size of coal sample is larger than 20 mm, the exposure time should be less than 30 min.
【作者单位】：重庆工程职业技术学院;瓦斯灾害监控与应急技术国家重点实验室;中煤科工集团重庆研究院有限公司;
【分类号】：TD712

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