In order to study the influence of multi-face mining on surface subsidence in fully mechanized coal seam, the surface subsidence caused by the mining of three working faces of No.2 coal seam in Yangdong Mine was studied by means of theoretical analysis and numerical simulation. The results showed that the maximum surface subsidence value was 2.58 m and the maximum horizontal displacement value was 0.65 m. Through numerical simulation, it was concluded that there were obvious ' three zones ' distribution in the mining process. The stress of overlying strata above the goaf was relieved, and the stress concentration occurred in the coal pillar. After the mining of No.8268 Face and No.8476 Face, the caving condition of overlying strata was independently distributed. After the disturbance of No.8468 Face, the overlying strata above No.8268 Face and No.8476 Face collapsed at the same time. The maximum surface subsidence value of No.8268 Face and No.8476 Face was 0.58 m, and the maximum horizontal displacement value was 0.12 m. When mining No.8468 Face, the maximum surface subsidence value was 2.95 m, and the maximum horizontal displacement value was 0.35 m. The research results could provide theoretical guidance for the disturbance of subsequent mining to the surface.
管韦韦. 综采煤层多工作面开采地表沉降研究[J]. 煤炭与化工, 2025, 48(6): 40-44.
Guan Weiwei. Study on surface subsidence of multi working face mining in fully mechanized coal seam. CCI, 2025, 48(6): 40-44.
