Abstract:

For improving the recovery efficiency of mining and increasing its productive capacity，the realization of the optimization of stope structure parameters requires following steps.Firstly，ANSYS software is adopted to carry out the numerical simulation analysis for the stope structural parameters of the twelve different mining programs，and then the relative targeted values are figured out，such as the maximum main stress of a stope，roof subsidence，sides displacement and maximum tension stress.After the careful analysis and selections，the following nine various feasible programs are finally selected out and each stope with the height of less than 14 m and the width of less than 15 m.Secondly，the orthogonal test range method （R Method） is carried out to take the significance analysis and calculation for the targeted values，which are obtained through the demonstrations of above programs，and finally we affirm that the optimal combination of the width and the height of the stope structure is respectively 9 m and 14 m.By applying the optimal stope structure into the field experiment，and taking the actual measurement for the roof subsidence of the stope，we come to obtain the maximum value with 19.91 mm，which makes the relative error of 7.48% comparing with the simulated results.Thus it shows and verifies the high accuracy of the simulated result.The finished stope experiment shows that if the optimal structural parameters by using the ANSYS-R method is carried out，which can not only ensures security and stability of the stope，but also can greatly improve the recovery efficiency and productive capacity of the stope.This method is also proved to be reasonable and reliable through the above experiment，and so that it can provide a decision-making basis for optimization of stope structure parameters design.

Key words: numerical simulation, stope structure, the range analysis