Abstract:

In order to achieve the goal of increasing production of an underground phosphate rock，the

EWM-GRA comprehensive evaluation model was constructed by combining the EWM entropy weight meth⁃

od and the GRA grey correlation method under the comprehensive consideration of mining safety，technical

and economic factors. Based on the evaluation model，nine groups of different stope structure parameter

schemes were analyzed. The results show that the scheme with the route width of 3.5 m and the route height

of 3 m is the best. From the field practice，the mining volume per meter of the 3.5 m × 3 m stope structure

parameter scheme is 27.37 % higher than that of the original design scheme，which can achieve the goal of

increasing production. Compared with the original scheme，the economic benefit of each approach has in⁃

creased by 28.33 thousand yuan，which is greater than the increased mining cost，indicating that the opti⁃

mized stope structure parameter scheme is reasonable and feasible. The research results can provide refer⁃

ence for the design of structural parameters of phosphate mine stope.

Key words:

stope structure parameters, EWM entropy weight method, EWM-GRA comprehensive

evaluation model