Study Of Precursory Rules With Multi-Parameters Monitoring For Coal Mass Instability Destruction

In deep mining, coal and rock mass dynamic instability destruction showed abnormal violent, suddenly, and nearly no macroscopic precursor sometimes. So it had an important means to achieve accurate information of instability destruction precursor of coal and mine. In this paper, taking use of the self-designed multi-parameter experimental monitoring system which include acoustic emission, dielectric constant, the strain field and the surface temperature field, studying the acoustic emission, dielectric constant and temperature precursors information under uniaxial compression base on time-space evolution of uniform medium deformation localization zone. According to the results of microseismic and electromagnetic radiation in the process of rock bust in deep mining, to analyze precursors generating mechanism with the conclusions of experimental. Taking the small fault as research background, which existence ahead of fully mechanized coal face, the roadway stability were synchronous monitored by the means of multi-parameter methods. Monitoring equipments include support load, temperature, humidity, wind speed, electromagnetic radiation and so on which distributed in the two roadways. In order to summary and analyse the data which achieved in site multi-parameter monitoring, using multivariate statistical methods. The numerical simulation of three-dimensional reconstruction model based on the CT scan images, which analyse the time-space evolution characteristics of stress field and plastic zone at each time period under the dynamic load. Meanwhile, the evolution rule of energy which produced in numerical simulation was also studied. According to above research, it had more deeply understand precursor characteristics of coal and mine dynamic instability destruction.