Theory and Practices on Stress Control of Mine Pressure Bumping

Based on the study and site practices on the mine pressure bumping theory,with the stress control as the center and the unit stress gradient as the mine pressure bumping stress control and prevention theory was put forward,the similar simulation and the numerical simulation were applied to analyze the in-situ rock stres s,structure stress and mining stress to the induced mechanism of the mine pressure bumping occurred.From the view of the stress control,site practices were conducte d on the mine pressure bumping prevention and control.The study results showed that the structure stress of the fault would be the major causes to make the mine pres sure bumping occurred.Affected by the residual stress from the neighbor mining blocks, the mining stress of the coal also would cause mine pressure bumping in the mi ne roadway.In the mine pressure bumping prevention practices with the advance roof pre-fracturing blasting with deep borehole and the dynamic stress control when th e open-off cut was cut-through,the effectiveness of the stress control theory was proved.