摘要
为研究承压水条件下煤体浸湿变形的特征,采用自制承压水浸湿变形监测系统,开展不同水压条件下煤体浸湿变形实验,得到承压水浸湿诱导煤体变形特征规律。结果表明:0 MPa水压下煤体横向与纵向均呈现拉伸变形,煤体体应变为拉伸状态,而承压后煤体横向变形呈现先压缩后拉伸的趋势,纵向则均为压缩变形,煤体体应变为压缩状态;随着水压的增大,煤体纵向的压缩变形量及煤体体应变均呈现逐渐减小的趋势;卸压后煤体的残余变形量随水压的增大而减小。
In order to study the characteristics of wetting deformation for coal body under the conditions of confined water,the experiments on wetting deformation of coal body under different water pressures were carried out by using the self-made monitoring system of confined water wetting deformation,and the deformation characteristics of coal body induced by confined water wetting were obtained.The results showed that when the water pressure was 0 MPa,the tensile deformation presented both in the transverse and longitudinal directions of coal body,and the body strain of coal body was in the tensile state.While under the confined pressure,the transverse deformation of coal body presented the trend of first compressing and then stretching,the longitudinal deformation was the compressive deformation,and the body strain of coal body was in the compressive state.Both the longitudinal deformation amount and body strain of coal body presented the trend of decreasing gradually with the increase of water pressure.The residual deformation amount of coal body after the pressure relief decreased with the increase of water pressure.
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2017年第12期33-37,共5页
Journal of Safety Science and Technology
基金
国家自然科学基金项目(51404009
51604010)
安徽理工大学校青年基金项目(QN201629)
关键词
煤体变形
承压水
浸湿
体应变
coal body deformation
confined water
wetting
body strain
