Risk analysis and prevention technology of mine pressure bump occurred in coal mining face forward to mining goaf

In order to effectively prevent the mine pressure bump occurred when No. 7110 coal mining face was advanced forward to the goaf at the isolated coal pillar with a width of 60 m,a theoretical analysis and microseismic monitoring and measuring method was applied to the analysis on the danger of the mine pressure bump and th e relevant prevention and control measures were provided. The theoretical analysis could understand the stress condition and triggering condition of the mine pressure bu mp occurred in the bump potential seam and the triggering factors would be the buried depth, overburden strata space structure and turbulences. The analysis on the actual condition showed that the coal mass sidewalls of the railway gateway and the connection gateway in No. 7110 coal mining face could meet the stress condition and the trig gering condition of the mine pressure bump occurred and the mine pressure bump danger was high. The microseismic mentoring and measuring results showed that the bo rehole pressure releasing measures conducted in the seam of the danger zone could realize the stress transfer and could effectively prevent the mine pressure bump occur red.