Study On Prediction And Prevention Of Burst In High Stress Area Of Deep Mining

With the increase of coal mining depth and scope of the expansion of mining, stope high stress caused by burst growing threat to production. Deep caving mining in complex and dynamic pressure under the conditions of high energy, high-stress region is difficult to predict the impact of risk and control, mining technology is difficult. In this paper, it used theoretical analysis of the causes of the phenomenon of dynamic pressure and the influencing factors. Depth of 900m under the rock deformation energy accumulated in large thick roof and floor rock, high strength, after mining the accumulation of large elastic energy roof, the fault area is easy to create high-stress area, the phenomenon has occurred in the conditions of dynamic pressure. It used RFPA Software to simulate the conditions of two different depths on the mining area along the face dip and strike. Obtained with the increase of mining depth, face the phenomenon of dynamic pressure will become increasingly clear that the exploitation of coal seams greater risk factor.Face tunneling and mining in two stages to enhance prediction and control of dynamic pressure, cuttings Kong and France are the main monitoring and early warning, monitoring of secondary electromagnetic radiation. Drivingφ42-44mm coal face by drill class to play 15-20m deep drilling to advance exploration, coal mining surface trough to help single-row layout spacing 6m,15m deep hole drilling the monitoring, drilling direction is parallel to the seam, Vertical Drift. Electromagnetic radiation detector using KBD5 head office on the driving range and the trough 50m 200m ahead of the scope of use of sentinel surveillance. At the same time do a good job getting rid of danger effects danger zone detection. First, the overall control burst open layout is reasonable, appropriate mining methods to avoid high stress concentration and energy accumulation by changing the physical and mechanical properties of coal seam, blasting off the top, to force roof and Blasting and other advanced approach to thick hard roof, remove a large area to burst pressure and threats. Mainly localized control blasting and drilling relief relief in two ways. Face advance support should be flexible, able to absorb energy and impact of the hinged roof beams and wood back and hydraulic prop to support so as to ensure the safety of the production face. Stope in deep areas of high stress dangerous phenomenon of dynamic pressure prediction and prevention techniques, but to ensure the normal driving surface mining face advance and the security of the production of great significance.