Study on Mine Rock Disaster Based on Acoustic Emission Technology

Abstract

Study the effect of water on the acoustic emission quiet period before the destruction of rock based on the uniaxial loading experiment of acoustic emission of drying, natural and saturated basalt. The results show that the drying, natural and saturated basalt have AE quiet period before rupture. The load level of AE quiet period quiet period increase and shorter duration, and quiet period recognition is more difficult.AE quiet period, the AE event rate maintain per 10, but AE energy rate is not calm and characterized by accelerated release, and the release rate decreases with the increasing of water content. Due to full water characteristics of the actual mining basalt and the complexity of its fracture, the dominant frequency the AE rate of mutational characteristics and the AE event rate calm characteristic can be combined used to obtain information. The rate of mutation phenomenon before AE quiet period can be used as early warning information of saturated basalt rupture, and AE quiet period can be used as precursory information of saturated basalt rupture.