In order to solve the support problem of thick coal seams under structural stress,this paper combines the geological conditions of the 2307 working face of Xiahuo Coal Mine,and takes the tunnels excavated along the roof and floor of thick coal seams as the main research objects.The numerical simulation method is used to study the surrounding rock stability of two types of tunnels in the structural stress field,from the results,it can be seen that the deformation and damage of the roadway along the top during excavation are mainly caused by bottom bulges and sheet walls,which can effectively maintain the integrity of the roof.However,the deformation and damage of the roadway along the bottom are mainly caused by roof caving and sheet walls,which can effectively maintain the integrity of the bot-tom plate and coal wall.Under the same coal pillar width,the mining impact on the bottom excavation roadway is relatively small,while under the same burial depth,the mining impact on the top excavation roadway is relatively small,providing theoretical and technical support for the reasonable selection of tunnel excavation layers and support in such engineering scenarios.
tectonic stressexcavation layernumerical simulationsurrounding rock control
万方数据
维普
