Abstract
Coal and gas outbursts are a mechanical dislocation process of a gas-logged and porous medium. The existence of the disturbed coal is a precondition of the outbursts. The study showed that the disturbed coal and normal coal are greatly different in mechanical and physical properties which decided the speeds of ultrasonic wave travelling in them. This paper presents a set of experimental measuring system and method. The results of measurements conducted in 60 min areas revealed quite different ultrasonic characteristics in different types of coal mass textures. Measuring the disturbed coal is a new way for predicting the outbursts.
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References
Peng Lishi, Yuan Chongfu, Zhang Zixu, et al. Gas geology (in Chinese). Beijing: Coal Industry Press, 1991. 320–325
Yang Luwu. Mechanical properties of coal mass texture (in Chinese):[dissertation]. Jiaozuo: Jiaozuo Institute of Technology, 1993
Lu Shaolin, Liu Mingju, Cao Jianping. Ultrasonic characteristics of coal mass and its application. In: The treatise of gas geology (in Chinese). Beijing: Coal Industry Press, 1995. 256–259
Lu Shaolin. Theorical basis of probing coal mass structure by ultrasonic wave. Journal of Jiaozuo Institute of Technolgy (in Chinese), 1995(1):76–79
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Project supported by the National Natural Science Foundation of China
Synopsis of the first author Lu Shaolin, associate professor, born in Nov. 1960. Major research fields: theory and methods of coal and gas outbursts prediction and gas geology, received 5 Scientific and Technological Achievement Prizes of Province and Department, published more than 20 scientific papers.
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Lu, S., He, J. Ultrasonic characteristics of the disturbed coal mass. J Cent. South Univ. Technol. 4, 42–45 (1997). https://doi.org/10.1007/s11771-997-0028-x
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DOI: https://doi.org/10.1007/s11771-997-0028-x