ULTRASONIC CHARACTERISTICS OF THE DISTURBED COAL MASS

来源期刊：中南大学学报(英文版)1997年第1期

论文作者：Lu Shaolin He Jishan

文章页码：42 - 45

Key words：ultrasonic characteristics; disturbed coal mass; coal and gas outbursts

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 disturbedcoal 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 resultal of measurements conducted in 60 min areas revealed quite different ultrasonic characteristics indifferent types of coal mass textures. Measuring the disturbed coal is a new way for predicting the outbursts.