Study on layout of roadway in sublevel fully mechanized caving mining of near-vertical and extremely-thick coal seam

doi:10.16265/j.cnki.issn 1003-3033.2020.10.014

Abstract

Abstract: In order to optimize layout of roadways in sublevel fully mechanized caving mining of near-vertical and extremely-thick coal seam, with mining project of near-vertical coal seams in Wudong coal mine as engineering background, theoretical analysis, numerical simulation and other methods were adopted to study distribution law of surrounding rock stress and displacement as well as stability of whole-coal and semi-coal roadways. Stress concentration of surrounding rock for roof side roadway was significantly higher than that for floor side one. In case of whole-coal roadway, its deformation was greater while stress concentration was relatively lower, and deformation of surrounding rock made a leading factor that affects its stability. However, for semi-coal roadway, stress of surrounding rock became a major factor as deformation of roadway was smaller while stress concentration is relatively higher. The results show that with deformation, stress concentration and stability control of surrounding rocks taken into consideration, a whole-coal roadway without retained coal skin would be a better option for near-vertical and extremely-thick coal seams.

Key words: near-vertical coal seam, roadway layout, whole-coal roadway, semi-coal roadway, thickness of retained coal, width of rock roadway

CLC Number:

X936

ZHONG Taoping, LI Zhenlei, LIU Xudong, SONG Dazhao, FENG Panfei, LI Donghui. Study on layout of roadway in sublevel fully mechanized caving mining of near-vertical and extremely-thick coal seam[J]. China Safety Science Journal, 2020, 30(10): 96-104.

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