Experimental study on phased propagation law#br#
of longitudinal wave velocity of coal and rock mass#br#
under different moisture content
Guan Zhengwei1, Zhao Zihao2, He Jun2, Wang Anhu3
1.Jiulishan Mine, Henan Coking Coal Energy Co., Ltd., Jiaozuo 454000, China; 2. Safety Science and Engineering College, Henan Polytechnic University, Jiaozuo 454000, China; 3. Metal smelting major accident prevention and control technology support base, Beijing Science and Technology University, Beijing 100083, China
In order to study the continuous influence of moisture content on the longitudinal wave velocity of coal and rock mass, and further improve the accuracy of microseism monitoring in mining area, the coal and rock mass of Jiulishan Mine in Jiaozuo mining area was taken as the sample, and the DS5 full information acoustic emission signal analyzer was used to test the non-load wave velocity of different moisture content gradient samples. The three-stage propagation law of wave velocity of coal and rock mass with moisture content was revealed. The results showed that the longitudinal wave velocity of coal rock increased significantly with the increase of water content. According to the saturation, it could be divided into three stages : rapid growth, slow growth and stabilization. The filling of pore cracks was the main reason for the increase of wave velocity. The pore development degree of coal was high, the sensitivity to water was stronger, and the increase of wave velocity was much higher than that of rock sample. This study provided an experimental basis for microseism monitoring calibration and mine disaster prevention and control in mining areas.
关政伟1，赵子豪2，何 俊2，王安虎3. 不同含水率下煤岩体纵波波速分阶段传播规律试验研究[J]. 煤炭与化工, 2026, 49(8): 80-85，90.
Guan Zhengwei1, Zhao Zihao2, He Jun2, Wang Anhu3. Experimental study on phased propagation law#br#
of longitudinal wave velocity of coal and rock mass#br#
under different moisture content. CCI, 2026, 49(8): 80-85，90.
