Multi-objective Optimization and Practice of Stope Structural Parameters Under Complex Geological Conditions
Under complex geological conditions,the stope structure parameters need to meet the multi-objective requirements of safety,technology and economy of mine production at the same time.However,because of the differences in the requirements of each objective on the stope structure parameters,it is generally difficult to determine the stope structure parameter scheme that meets the multi-objective requirements.Taking a gold mine as the background,the rough set and response surface methodology were combined to optimize the stope structure parameters of shallow hole shrinkage method and analyze the trend.Using rough sets to determine the optimal combination of mining structure parameters for a mining room length of 60 meters,a mining room width of 4 meters,a top pillar width of 5 meters,a bottom pillar width of 4 meters,and a spacing pillar width of 6 me ters.The following results can be obtained by the response surface methodology.Firstly,the width of the mining room and the interaction factor between the width of the mining room and the width of the top pillar were the stope structure parameters that has the greatest influence on the stability of the stope.Secondly,the length of the stope is the stope structure parameter that has the greatest influence on the production capacity of the stope.Thirdly,the width of the bottom pillar and the interaction factor between the width of the bottom pillar and the width of the pillar are the structural parameters of the stope that has the greatest influence on the production cost of the stope.After adopting the above stope structure parameters,the annual safety production accidents of the gold mine are reduced by 68％,the average production capacity of the stope is increased by 27％,and the mining production cost is reduced by 19％.The safe,efficient and economical production of the mine is realized,which provides a new idea for the optimization design of the stope structure parameters under other similar conditions.
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