Research on the relationship between coal burst tendency and rockburst risk of coal seam

Abstract

ABSTRACT The burst tendency and the risk of rock burst are of great significance in the research of coal mine, which is the basis for the prediction and prevention of rock burst. In order to avoid the confusion of two basic concepts, their essential properties and differences are discussed in detail. In this paper, a prediction model of rock burst in circular roadway based on disturbance response instability theory is proposed, and the critical stress formula of burst is derived to obtain the relationship between the burst tendency and the rockburst risk. The results show that the burst tendency is a necessary condition and an important index to evaluate the strength of the rockburst risk. The risk of rock burst is the possibility and harm degree of rock burst in coal seam with burst tendency. A new identification index of burst tendency and a new evaluation index of rock burst risk are put forward, which provides a new method for the risk evaluation and provides theoretical guidance for prevention and control.