Study on the law and control technology of strata behaviors during the fully mechanized mining face passing through coal pillar in goaf
In view of the problem that the rock pressure was violent and the support crushing phenome-non of the working face was serious when the 31201 fully mechanized mining face of Shigetai Coal Mine passes through the concentrated coal pillar area of the overlying goaf,the characteristics of the rock pressure before and after the concentrated coal pillar in the working face were studied and an-alyzed by means of on-site observation,and the key prevention and control areas of the dynamic load rock pressure in the working face were determined from the perspective of microseismic events and en-ergy,and the concentrated coal pillar blasting technology was proposed.The practice shows that by directional blasting of concentrated coal pillar in goaf,the rock pressure control effect is remarkable.This technology can effectively improve the prevention and control effect of mine dynamic load rock pressure disaster,reduce the number and energy of microseismic events,and avoid the occurrence of pressure frame phenomenon.
万方数据
维普
