DOI: 10.11799/ce201705013
Stability of roadway surrounding rock under multiple mining influence of fully mechanized top-coal caving face in extra thick coal seam
LIU Zhan-bin
MA Zhan-guo
YANG Dang-wei
Abstract：According to the technical problem of mining influence in extra thick coal seam during top coal caving in Buliangou Coal Mine,structural mechanics theory was used to build a mechanics model of the overburden strata structure and analyze the surrounding rock stability under mining influence.The post-breaking analytical formula was obtained for key block subsidence in overlying rock.A 3D numerical model was established to study the displacement and plastic zone distribution of surrounding rock,obtaining the deformation and failure law of surrounding rock under mining influence.Field measurements showed that,F6103 face rear 15～20m roadway was affected by the first mining,and the mining disturbance had little influence on the stability of surrounding rock;while F6104 face rear 12.5～30m roadway is affected by the second mining,the rock pressure of the surrounding rock was severe,and the deformation was obviously increased.
Keywords：extremely thick coal seamfully mechanized top coal cavingmining influencesurrounding rock stabilitystructure of overlying strata
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 40-43 )