摘要
Abstract
In view of the difficult problem that working face rock burst is easy to occur during the stoping of steeply inclined coal seam fully mechanized caving face,taking the north coal mining seam of Wudong Coal Mine as the research object,means of field experiments,theoretical analysis,numerical simulation and others are used to study the overlying rock mass structure and migration law in different stopes,revealing the disaster-causing mechanism of rock burst.The special geological occurrence conditions and relatively strong impact tendency of coal and rock,the superposition action of static crustal stress and mining disturbance stress of horizontal segmented fully mechanized caving face,and the dynamic instability of"cantilever beam"structure induced large-scale sliding of overlying rock in goaf are the main reasons for causing rock burst of steeply inclined coal seam.Propose comprehensive measures such as water injection weakening as the main approach,roof pressure relief as the supplement approach and so on to control rock burst of steeply inclined coal seam fully mechanized caving face.After water injection weakening,the effect of roof rupture is very significant.As the apparent resistivity of drilling and blasting increases by 10-15 Ω,the range of roof rupture is further expanded,the degree of roof stress concentration is reduced,and a relatively good preventive effect is achieved.关键词
急倾斜/综放/冲击地压Key words
steeply inclined/fully mechanized/rock burst分类
矿山工程
