摘要
为深入了解Uniaxial strain情况下渗透率的变化规律以及垂直应变的变化情况,在实验室环境下模拟Uniaxial Strain的应力、应变环境,分析煤样随着孔隙内气体压力的降低渗透率以及垂直应变的变化。结果表明,随着孔隙内气体压力降低,煤样的渗透率增长,并且增长率逐渐增大;煤样的垂直应变始终是在一个很小的范围内波动,证实了体积不变理论的合理性。该成果对于深入了解渗透率的变化规律以及地下应力环境的变化的研究具有重要意义。
In order to obtain a better insight into the variations of coal permeability and vertical strain under uniaxial strain condition,a laboratory investigation was carried out to measure both the coal permeability and the vertical strain.The coal permeability increases as the pore pressure decrease while the increase rate is higher in the low pore pressure range.The vertical strain varies in a small range during the variation of pore pressure,which demonstrates the constant volume theory proposed by Massarroto.This study is of great significance for understanding the coal permeability variation and in situ underground stress.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2010年第6期1016-1019,共4页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金支持资助项目(51074008)
关键词
渗透率
垂直应变
体积应变
permeability
vertical strain
volume strain
