Author: CUI Feng, LIU Zhenbo | Time: 2020-11-11 | Counts: |
doi:10.16186/j.cnki.1673-9787.2020.6.5
Received:2020/01/19
Revised:2020/03/26
Published:2020/11/15
Feasibility study of repeated mining with fully-mechanized top-coal caving in district sublevel pillar of ultra-thick seam in Gengcun coal mine
CUI Feng, LIU Zhenbo
Henan Dayou Energy Co. , Ltd. , Sanmenxia 472431 ,Henan, China
Abstract:In order to extend the service life of coal mine, to improve the recovery rate of coal resource and to relieve the shortage of replacement in the coal face, district sublevel pillar in ultra-thick seam of Gengcun coal mine is taken as the sample, and the fully mechanized caving mining technology for recovering district sublevel pillar with ultra-thick seam was put forward. The overburden fracture model of the coal face was established, and it was determined that gateway safety could be guaranteed safe when the coal face was arranged in alternate of coal and gob at a distance of 30 m from the district sublevel pillar. According to judging the rock burst grade of the coal face, the technical scheme for preventing and controlling the disasters was put forward, such as rock burst, gateway support, gas overrun and spontaneous combustion. The results showed that it was safe and feasible to repeated mining district sublevel pillar, which could extend the service life of the mine, improve the recovery rate and relieve the tension of coal face replacement. Meanwhile, the research results can provide reference for other mines with the similar conditions.
Key words:Gengcun coal mine;ultra-thick coal seam;repeated mining with fully-mechanized top-coal caving;
耿村煤矿巨厚煤层区段煤柱综放复采可行性研究_崔峰.pdf