Rock burst prevention and control technology of mine driving gateway passing through mining terminal line in contiguous seams

In order to prevent and control the rock burst of the driving gateway,the paper firstly determined the main natural influence factors,including the seam power ful bumping tendency,horizontal ground stress and hard and thick roof. According to the location of the site rock burst occurred,a numerical simulation was applied to analy ze stress distribution of the driving face passing through mining terminal line area of the driving face in the top seam and to determine that a multi mining stress superpositi on was the power source factor of the rock burst occurred. According to the site micro-seismic monitoring and measured results,the paper held that energy released from th e high level hard roof failure would further seriously make stress concentrated in the seam and was the induced factor of the rock burst occurred.The paper divided late dri ving area into powerful rock burst danger area and normal rock burst danger area. The danger releasing measures to enhance the support and large diameter borehole Co mbined seam standing blasting were provided to the powerful rock burst danger area and the advance strata pressure releasing with a seam water injection conducted in th e normal rock burst danger area. The site electromagnet radiation detection results showed that a electromagnet radiation intensity and pulse of the powerful rock burst da nger area would be obviously higher than the normal rock burst danger area and also showed that the effect of the measures to release the rock burst danger was obvious to ensure the safety of the late driving operation.