Numerical Simulation Research On Inoculation Mechanism Of Rock Burst In1111Working Face Of Zhuji East Mine

The rock burst is a coal and rock dynamic disaster, which usually occurs on condition that the strength reaches its ultimate strength in coal and rock mechanics system. The accumulated elastic energy in coal and rock will be released in the form of a sudden, sharp and fierce. As a result, it will cause significant casualties and economic losses. With our country’s mining turns to deep location, it is particularly urgent to study inoculation mechanism of rock burst and predict, control rock burst.This paper bases on the basic understanding that the micro failure is the rock burst, etc. mine dynamic disaster precursor characteristic. Start from the essence that the mining disturbance induces mine dynamic disaster. By means of RFPA numerical simulation, summarizing and analyzing inoculation mechanism of the rock burst and etc. mine dynamic disaster, revealing inherent motivation and precursor characteristic of rock burst. Studying the inoculation mechanism of the rock burst on condition that loaded, unloaded and the mining disturbance, in order to deeply reveal the influence factors of rock burst under the action of disturbance of coal seam. Seeking for the relationship between impact tendency and microseismic, which lays theoretical basis for the real-time forecast of rock burst. This article’ s main research contents are as follows:(1) Starting from the inhomogeneity of coal and rock, to discuss what is at the root of the rock burst and to search for precursor characteristic and inherent motivation of rock burst.(2) Discussing the inoculation mechanism of the rock burst on condition that loaded and unloaded. By using numerical simulation method, we can simulate respectively on uniaxial loading, multi-axis unloading which in different stress conditions. Then, discusses that the model of rock burst under uniaxial loading and multi-axis unloading conditions and the risk of rock burst under different stress conditions.(3) Study on the inoculation mechanism of rock burst, which is induced under the condition that excavation unloading of coal seam. To simulate respectively on three aspects, such as ordinary coal seam excavation, containing gas coal seam excavation, including faults coal seam excavation. According to the variation of abutment pressure, we can look for the distribution characteristics of stress field about mining of coal-rock, analyze the destruction of the coal seam mining process, to analyse the inoculation mechanism of rock burst.(4) Using the numerical simulation method of the RFPA2D, to research the seismic activity characteristics in the process of coal and rock burst and to discuss respectively the coupling relationship between impact tendency and microseismic under different coal quality. By looking for a series of laws, in order to provide certain theoretical feasibly guidance on predicting the rock burst.