Study On Prevention And Control Technology Of Rock Burst Of Deep Complex Thick Seam

The rock burst has been a major hazard of safety production in current coal mine. The coal seam,roof and floor constitute a balance system. Based on the existing results of research, by main use of elastic-plastic mechanics, damage mechanics , rock mechanics, and other relevant theories, this paper does specific analysis and research on prevention and control technology of rock burst of deep complex thick seam, and focuses on prevention and control of comprehensive caving rock burst of deep complex thick seam as well as its deformation and damage to the roadway depending on the derivation of mechanics theory and analysis of mechanical model and by means of field measurements. Through the the derivation of mechanics formula, the roof and the limits of the region after the end-floor has lost balance of the destruction of stress, the specific damage variable and support pressure viscoelastic injury analytical formula of complex deep seam are determined. Through the danger analysis of regional tectonic stress and the mountain of coal pillar, three basic assumptions are identified and the height of limited equilibrium district stress and the height of gob edge are calculated. Furthermore,according to the transformation relationship of energy, the mechanical conditions criterion of pillar damage instability is obtained. Numerical simulations to on different locations of the stress highly concentrated coal-lane are relieved by means of two simulation softwares,which are RFPA and FLAC, to determine the reasonable position of relieving lane and show the correctness of the tendency of coal-bearing pressure distribution. Combined with the application of control technology and the monitor of roadway deformation, the dangerous region is determined under the static and dynamic state of the coal pillar, and specific measures to resolve danger are proposed. The practical application results show that the theoretical research results and the scene have so good consistency that it plays a important role in guiding the practice of on-site work and thus the prevention and control theory and method of comprehensive caving rock burst of deep complex thick seam is improved.