煤层透气性系数测定方法的优化研究  

Optimization Research of the Methods for Determining the Gas Permeability Coefficient of Coal Seam

作　　者：王建伟 WANG Jianwei(China Coal Technology and Engineering Group Chongqing Research Institude,Chongqing 400037;State Key Laboratory of Gas Disaster Monitoring and Emergency Technology,Chongqing 400037)

机构地区：[1]中煤科工集团重庆研究院有限公司 [2]瓦斯灾害监控与应急技术国家重点实验室

出　　处：《河南科技》2019年第17期87-89,共3页Henan Science and Technology

摘　　要：煤层透气性系数与钻孔瓦斯流量衰减系数都是反映煤层瓦斯抽采难易程度的重要指标,通过对两者通用的测算方法进行分析,发现两者在反映煤层瓦斯抽采难易程度上存在不一致的问题。针对该问题,本文在原测算方法的基础上提出了一种优化处理煤层透气性系数的方法。采用该方法,能准确反映原始煤层真实的透气性,避免了原测算方法因采用基础数据不同带来的结果差异,在现场实践运用中合理、可靠,能为评判煤层抽采难易程度提供准确的依据。Gas permeability coefficient of coal seam and damping factor of gas flowrate per hole are important indica?tors reflecting the difficulty of coal seam gas drainage.Through the analysis of the current common measurement methods,it is found that there are inconsistencies in the degree of gas drainage in the coal seam.For this problem,this paper first proposed an optimized treatment of coal seam based on the original calculation method.The method of gas permeability coefficient can accurately reflect the true gas permeability of the original coal seam,avoiding the dif?ference in the results of the original measurement method due to the use of different data.It is reasonable and reliable in field practice,and can be used to judge coal seams.The level of difficulty provides an accurate basis.

关 键 词：煤层透气性系数 钻孔瓦斯流量衰减系数 优化 

分 类 号：TD712[矿业工程—矿井通风与安全]