摘要
采用自主研发的"散碎煤岩体瓦斯运移特性试验装置",分别对纯煤试样、含单层夹矸试样、含双层夹矸试样开展不同条件下的瓦斯流动特性试验,并进行了理论分析.结果表明:煤与夹矸之间存在挤压变形作用,挤压变形速率先减小后增大;透气性夹矸层对煤层渗透率的促进效果随夹矸孔隙率的降低和夹矸层数的增加而减弱;夹矸层物性特征的变化并不会改变煤层渗透率与瓦斯压力的二次函数关系;夹矸层数的增加会减弱其对滑脱效应的阻碍作用.
The influence of porosity,layer number and other physical properties of gas breathable gangue on the permeability characteristics of coal seam were studied using a self-developed gas migration characteristic test device.In the experiment,the gas flow characteristics of pure coal sample,single-layer gangue sample and double-layer gangue sample were tested under different conditions,and the theoretical analysis was carried out.The results show that there is extrusion deformation between coal and gangue,and the deformation speed decreases at first and then increases.The permeability of coal seams decreases with the decreasing of the gangue porosity and the increasing of the gangue number.The change of gangue physical characteristics will not change the quadratic function relationship between the permeability of coal seam and the gas pressure.The increasing of gangue layer will weaken its hindrance to the slippage effect.
作者
赵洪宝
王涛
张欢
李金松
李金雨
ZHAO Hongbao;WANG Tao;ZHANG Huan;LI Jinsong;LI Jinyu(School of Resources and Safety Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;.State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Henan Polytechnic University,Jiaozuo,Henan 454001,China)
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2019年第1期29-35,共7页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(51474220)
河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地开放基金项目(WS2017A06)
深井瓦斯抽采与围岩控制技术国家地方联合工程实验室开放基金项目(G201603)
关键词
透气性夹矸
夹矸层数
孔隙率
渗透率
滑脱效应
penetration gangue
gangue layers
porosity
permeability
slippage effect
