Abstract:

 In order to determine reasonable stope parameters and mining sequence which purpose is to increase the safety of mining the panel isolated pillar of deep well，and in view of the defects of the traditional methods do not consider the interaction between evaluation factors and do static analysis only，based on λ fuzzy measure and Choquet integral，a new idea of dynamic comprehensive evaluation method was put forward to select mining scheme.According to the engineering practice of 52# isolated pillar in Dongguashan copper deposit，four kinds of mining schemes was put forward，and five evaluation factors which influencing the mining scheme selection were determined，that is the maximum main stress of sidewall，the maximum main stress of end wall，the maximum horizontal displacement of lateral wall，the maximum vertical displacement of roof and the plastic zone size，and the initial datas of evaluation were obtained by means of coupling modeling between MIDAS/GTS and FLAC^3D，and the integrated superior degree of each scheme was calculated when interactivity degree is -0.99，-0.5，0，1 and 10 respectively.Finally，by comparing the integrated superior degree the optimal extraction scheme was determined，which is stoping from thick to thin，the length of each extraction unit from G₁ to G₇  is 36，34，34，52，70，70，70 m，side wall and end wall reserve 2～4 m thick pillar，alternating backfill after mining.

Key words: panel isolated pillar, mining sequence, &lambda, fuzzy measure, dynamic comprehensive evaluation