Optimization of Stope Structure Parameters Based on Modified Mathews Stability Diagram Method and FLAC3D
The increase of mining depth makes the mine face more uncertain factors in the production process.Reasonable stope structure parameters will effectively reduce the stope roof fall accidents rate.In order to determine reasonable and unified range of stope structure parameters,modified Mathews stability diagram method and numerical simulation were used to study the deep stope structure parameters of Gaofeng Mine,and the limit exposure area,stress cloud map,displacement cloud map and plastic zone distribution cloud map of stope under different stope structure parameters were analyzed.The results show that when the stope width is 8 m,the limit exposure area is 400 m2.When the mining method is simultaneous mining,and the height of the layer are 4 m and 12 m,it is recommended that the stope width should be less than or equal to 8 m.When advanced mining is adopted,the maximum principal stress of stope exceeds the safety warning line.Therefore,in order to ensure the safety of the mining process,it is recommended that the stope structure parameters are:the stope width is 7-8 m,the stope length is the thickness of the ore body,about 40 m,the stratification height is 4-12 m,and the mining method is simultaneous mining.
万方数据
维普
