Study and Application of Stress Three-Dimensional Theory to Prevention and Control of Mine Pressure Bumping

Based on the Euler deflection theory, a roof and floor pressurized bar stabilization model was established .After the seam pressure released, the critical | oad of the roof and floor would be increased and the possibility of the mine strata pressure bumping to be occurred would be increased.Therefore, a stress three dimen sion theory was provided to control the mine pressure bumping.Taking No. 163B00 coal mining face in Jisan Mine as an example, the seam pressure releasing, the floor broken with blasting and other danger releasing measures were taken to the mine pressure bumping danger area.With the bore fiberscope to inspect the floor broken ef fect with blasting and to observe the deformation, breaking and broken of the borehole, it could be verified that the pressure of the hard floor was released and the gate way surrounding rocks were in the stress three dimension status.The engineering practices showed that the stress three dimension theory applied to release the danger of the mine pressure bumping danger gateway could be effectively to prevent and control the mine pressure bumping.