Research on integrated regional prediction method of dynamic disaster of coal and gas in deep coal roadway

Aiming at the existing regional prediction methods of outburst danger and shock hazard can not meet the needs of precise control of coal and gas dynamic disasters in deep coal roadway excavation working face, using weight comprehensive index method, 13 factors reflecting the outburst and rock burst are considered, such as gas pressure, content and impact energy index, the buried depth of coal seam and gas pressure are taken as the key indexes, and the integrated regional prediction of dynamic risk in deep coal roadway strip is realized; The dividing index of the dynamic risk state grade in the roadway strip is determined, which is divided into four grades: no dynamic risk, weak dynamic risk, general dynamic risk and serious dynamic risk, and the corresponding countermeasures are worked out. The application results show that the integrated regional prediction method realizes the safe and rapid excavation of in Ding Ji mine 1222(1) coal roadway and Xie Yi mine 5131(5) coal roadway which the grade are general dynamic risk, it has important reference significance for similar conditions of mine. (paper)