摘要
为探讨低渗煤层瓦斯流动的非达西特征,基于GSI煤体分类体系与砂岩启动压力梯度测试方法,进行了不同煤体结构煤样的启动压力梯度测试,建立了启动压力梯度与煤体结构的回归关系,实现了煤层瓦斯流动状态的快速判识。研究表明:在煤矿井下采集煤样或直接观测煤壁,获取其煤体结构,并与GSI煤体分类体系进行比对,确定煤样GSI值后,通过启动压力梯度测试并建立其与GSI的关系,即可实现不同煤体结构煤层启动压力梯度的快速获取与瓦斯流动状态的快速判识。
In order to discuss non-Darcy characteristics of gas flow in low-permeability coal seam,based on coal body classification system and test method of starting pressure gradient in sandstone,starting pressure gradient in coal seam which have different coal structure was measured,the regression relationship between starting pressure gradient and coal structure was acquired,fast recognition of gas flow state in coal seam was realized.Research results show that coal structure can be acquired according to sampling or wall observation in coal mine firstly,GSI value of coal samples will be obtained by use of coal body classification system based on GSI,secondly starting pressure gradient can be tested in laboratory and the relationship between it and GSI will be acquired,then fast acquisition of starting pressure gradient and fast recognition of gas flow state in coal seam which have different coal structure will be realized.
出处
《中国矿业》
北大核心
2016年第6期104-108,117,共6页
China Mining Magazine
基金
国家自然科学基金项目资助(编号:51404093)
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资助(编号:WS2012A09)
国家安全生产监督管理总局安全生产重大事故防治关键技术科技项目资助(编号:henan-0025-2015AQ
henan-0007-2015AQ)
河南省教育厅科学技术研究重点项目资助(编号:14A440012)
焦作市科技计划项目资助(编号:2014400013)
河南理工大学博士基金项目资助(编号:B2008-15
B2012-093)
关键词
启动压力梯度
煤层瓦斯
流动状态
快速判识
地质强度指标
低速非线性渗流
starting pressure gradient
coal seam gas
flow state
fast recognition
geological strength index
low velocity nonlinear percolation
作者简介
韩颖（1980-），男，山东济南人，博士，副教授，主要从事矿井瓦斯防治与瓦斯地质领域的教学与科研工作。
