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Gold Science and Technology ›› 2019, Vol. 27 ›› Issue (6): 844-850.doi: 10.11872/j.issn.1005-2518.2019.06.844

• Mining Technology and Mine Management • Previous Articles     Next Articles

Optimization of Gently Inclined Thin Vein Mining Method Based on Variable Weight Theory and TOPSIS

Qinli ZHANG(),Yufei ZHAO,Shuai RONG,Qian KANG   

  1. School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China
  • Received:2019-02-17 Revised:2019-06-01 Online:2019-12-31 Published:2019-12-24

Abstract:

The mining of gently inclined thin veins always has the problem of low production capacity and difficulty in mining.It is still inconclusive as to which mining method is more suitable for the mining of such ore bodies.The choice of mining methods is closely related to the economic benefits,production scale,safety recovery and resource recovery rate of the mine.Therefore,the preferred research of mining methods is particularly important.In order to solve the problem of optimizing mining methods for high-quality gently inclined thin veins,a comprehensive evaluation standard system combining variable weight analysis and TOPSIS was proposed to comprehensively evaluate various mining methods.Firstly,a comprehensive evaluation index system was established,taking factors such as mining cost,ore recovery rate,ore depletion rate,difficulty in controlling ground pressure,stability of stope,mining ratio of thousand tons,suitability of the project,difficulty in construction,field production capacity as considerations.Considering the constant power determined by conventional methods such as AHP,there may be a phenomenon of “state imbalance” when evaluating each candidate scheme,introducing a variable weight theory and appropriately adjusting its weight to ensure the balance of various factors.Then the superiority of each scheme was obtained by using TOPSIS method to approach the ranking method of ideal solution.Finally,taking the optimum selection of mining methods in a mine in Inner Mongolia as an example,four schemes were put forward,which were the two-step strip and close filling mining method (Scheme Ⅰ),the upward horizontal layered filling mining method for scraper mining (Scheme Ⅱ),the upward horizontal layered filling mining method for electric picking (Scheme Ⅲ) and the room and pillar mining method (Scheme Ⅳ).The results show that the superiority of each scheme is 82.5%,32.8%,55.3% and 53.8%,respectively.Obviously the first scheme is the best one.The results are consistent with the engineering practice,which shows that the research idea has reference value for the optimization of mining methods,and provides a scientific and effective analysis method for the optimization of mining methods in future engineering.

Key words: mining method, variable weight theory, TOPSIS, comprehensive evaluation index, scheme decision-making, comprehensive superiority

CLC Number: 

  • TD853

Fig.1

Comprehensive evaluation index system of mining method"

Table 1

Comprehensive evaluation index system and its value"

指标方案Ⅰ方案Ⅱ方案Ⅲ方案Ⅳ
采矿成本(X1100110105116
矿石回采率(X290959364
矿石贫化率(X330202044
地压控制难度(X44666
采场稳定性(X56662
千吨采切比(X611.138.922.214.5
方案适应性(X76686
施工难易度(X88444
生产能力(X9260110105116
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