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After analyzing series monitoring data of micro-seismic and powered support pressure in Xinjiang,rock-burst mechanism was obtained. Thick and hard roof is main pressure source of rock-burst. Bad and delayed supporting make roof pressure transferred on coal-wall ahead of mining face. Thus, elastic energy and stress concentration formed, and fast mining speed aggravates energy and stress concentration degree. In this instance, rock-burst is inevitable because of strong burst liability of coal-seam. Based on this, rock-burst prevention principle was established that avoiding transferring hard and thick roof pressure to coal-wall. The prevention methods included broken blasting of hard roof, pressure-relief blasting of coal-body and increasing setting load of powered supports. The practice shows that prevention methods are effective. [ABSTRACT FROM AUTHOR]

Pointed out that the mining of region-wide has a close relation with the form of concentrated static load, needed by locally rock burst to occur. An regional preparedness idea of rock burst was brought forward, which based on the concept of dredging method of wide concentrated static load. Analysed the feasibility of adjust and effect law of high concentration stress of rock burst coal bed, by theoretical analysis and numerical simulation. It is indicated that the system of regional preparedness of rock burst, which based on the burst seam identification, stress testing, mining method selection, roadway location identification, protection layer mining and the orderly mining of the same coal bed, can avoid or reduce the high stress concentration. The study results give a guidance for design stage of the new mine, new mining area or new level design phase of producing coal mining to prevent rock burst. [ABSTRACT FROM AUTHOR]