Study on mining effect laws on tunnel of floor affected by the deep thick coal seam mining pressure

摘要

It's an important engineering application that research on laws of mining effect laws on floor under deep thick coal seam mining for reasonable mining terminal line.Based on 1282(3) face of Dingji Mine, advanced abutment pressure was segmented simplified and then the expression of distribution of floor stress was obtained.Stress concentration increment coefficient were calculated by the observation data and advanced mining effect distance was 110 m.Considering that the roadway's itself mining effect and long-term creep, at last the reasonable mining terminal line was identified as 177 m by considering geological condition, reference can be provided for roadways maintenance and coal pillar reserved.