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 com-pressive state .Both the longitudinal deformation amount and body strain of coal body presented the trend of decreasing gradu -ally with the increase of water pressure .The residual deformation amount of coal body after the pressure relief decreased with the increase of water pressure .%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.
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