Abstract:

To solve the open pit to underground mining best lotion-synchronized mode selection mining technical problems，the influence of open-synchronous dynamic underground mining model，static，quantitative， non-quantitative indicator were considered.Then we propose a theory based on Variable Weight Theory （VWT） and technique for order pleference by similarity to ideal soltion （TOPSIS） of the complehensive evaluation index sysem for four kinds of candidate open-underground mining model synchronization comprehensive evaluation preferable.Judging optimization process，AHP could lead to“state imbalances” phenomenon.According to the theory of variable weights，to ensure that the balance of the various factors，we appropriately adjust their weights based on different theories and variable weights of each factor on the configuration.And then to determine the degree of excellence of each mining model，we use the theory to calculate the overall TOPSIS superior degree of each program.The results of this paper apply to Shirengou iron ore open-underground mining synchronous mode selection，the calculated overall superiority of the four kinds of options were 0.087，0.767，0.898，0.723，and the third mining model comes to the first place.The results obtained in actual are basically consistent with the project，and achieve good economic，environmental and social benefits in the production process.

Key words: open pit to underground, mining mode, comprehensive evaluation, variable weights theory, TOPSIS