Roadway layout of combined mining of close distance coal seam and parameters optimization of bolt support
Yao Guofang1, Zhang Jichang1, Zhang Zhuopeng1, Yue Wei2
1. Shanxi Lanhua Coking Coal Ltd., Jincheng 048000, China；2. Mining Engineering Institute, China University of Mining & Technology, Xuzhou 221116, China
No. 2 and No. 3 coal seam in combined mining of Lanhua Mine, aiming at the slow speed of roadway mining, stressed mining and the serious roadway deformation, support difficulty and other the key technical problems, the roadway layout and mining roadway support, mine pressure observation and other aspects were studied, FLAC3D software was adopted to conduct numerical simulation for stress distribution and displacement of the roadway support plan, with engineering test on the site. Optimizing roadway layout and support, improving support strength and roadway surrounding rock control reduced production cost.
