Disturbance response instability theory of rockburst in coal mine

To make it a complete system of the mechanism,prediction and control of rockburst,disturbance response instability theory is deeply studied in this paper. Control quantity,disturbance quantity and response quantity of coal rock deformation system is proposed. Rockburst is concluded as a instability phenomenon of coal rock deformed system which happens when disturbance response approaches to infinite and disturbance response instability conditions of rockburst are given,if the coal and rock deformation system is in an unsteady equilibrium state,characteristic displace- ment of plastic softening deformation area will increase infinitely no matter how small the disturbance increment is. The analytical solution of rockburst happens in circular roadway is derived strictly observe disturbance response instability theory,and it indicates that there are critical indexes for disturbance quantity and response quantity,the critical inde- xes are determined by control quantity. Monitor and control of rockburst are narrated from the angle of control quanti- ty,disturbance quantity and response quantity. Monitoring methods such as mining stress monitoring are aimed at dis- turbance quantity,while monitoring methods such as drilling cuttings methods and microseismic methods are aimed at response quantity. Prevent methods such as rational mining layout,mining protective layer,rational coal pillar reten- tion,break roof are aimed at disturbance quantity,while prevent methods such as coal seam drilling,coal seam water injection,coal seam blasting,strengthening support are aimed at disturbance quantity.