Study on coal pillar width of roadway along gob in extra-thick coal seam
Wang Zhigen1, Su Xiangbin1, Li Yue2, Hao Hongru1, Jia Jincai1, Chen Yun1
1. Shanxi Shuozhou Shanyin Jinhaiyang Nanyangpo Coal Industry Co., Ltd., Shuozhou 036999, China；2. School of Energy and Mining Engineering，China University of Mining and Technology (Beijing)，Beijing 100083, China
Abstract： Aiming at the problem of width setting of protective coal pillar of mining roadway in fully-mechanized mining face of extra-thick coal seam, the vertical stress and distribution law of plastic zone under different widths of coal pillar were studied by numerical simulation with the return airway of No. 6104 Face in Nanyangpo Mine as the engineering background. The results showed that there was no elastic core area when the width of coal pillar was 5 ~ 15 m, and the elastic core area appeared when the width was 20 m, with an average of 7 m. The overall deformation of coal pillar was not large and was in a stable state. When the width of coal pillar was greater than 20 m, the width of elastic core area gradually increased. When the width of coal pillar was 20 ~ 30 m, the vertical stress appeared double peaks, and the peak decreased with the increase of coal pillar size. Considering comprehensively, the optimal width of coal pillar ws 20 m.
王志根1，苏相宾1，李 玥2，郝鸿儒1，贾晋才1，陈 云1. 特厚煤层沿空巷道煤柱留设宽度研究[J]. 煤炭与化工, 2023, 46(1): 18-20，24..
Wang Zhigen1, Su Xiangbin1, Li Yue2, Hao Hongru1, Jia Jincai1, Chen Yun1. Study on coal pillar width of roadway along gob in extra-thick coal seam. CCI, 2023, 46(1): 18-20，24..
