Mining Method Optimization of Gently Inclined and Soft Broken Complex Ore Body Based on AHP and TOPSIS: Taking Miao-Ling Gold Mine of China as an Example

Abstract

The gently inclined thin to medium thickness ore body under a weak rock stratum is one of the typical difficult bodies to mine. In order to solve the fuzziness, randomness, and uncertainty in the process of mining method optimization for such ore bodies, a multi-level, multi-factor, multi-objective, and multi-index comprehensive evaluation system involving technology, economy, construction, and safety was constructed by combining the analytic hierarchy process (AHP) and technique for order preference by similarity to ideal solution (TOPSIS). Taking the Miao-ling gold mine in China as an example, the AHP-TOPSIS comprehensive decision model of mining method optimization is established, the comprehensive superiority degrees of the four mining schemes are 67.57%, 45.07%, 56.07%, and 31.63%, and the upward horizontal drift backfill mining method is determined as the optimal scheme. The method is verified in the actual production of the mine, which not only ensures the safe production of the mine, but also achieves better technical and economic effects. The research results provide a reference for the optimization of mining methods for gently inclined and soft broken complex ore bodies at home and abroad.

Application of AHP-TOPSIS method in the preferred optimization of mining method

“…Referring to similar domestic and international mine mining experience with the safe, efficient and economic principles, suitable iron ore mining filling mining methods for ShengDa are mainly Subsection Relay Retreat mining and Filling mining method (scheme 1), Subsection Concrete column Filling method (scheme 2), Middle deep hole Extrusion Caving Following filling Mining method (scheme 3), Upward direction Filling mining method(scheme 4) and Hexagonal approach Downward filling mining method (scheme 5) [5,6] .…”

The Recent Progress China Has Made in Green Mine Construction, Part I: Mining Groundwater Pollution and Sustainable Mining

“…In addition, in 2012, Deng, D. et al [78] mainly applied ultra-high-water materials into the backfill mining method of a gold mine and explored the strength of backfill. Meanwhile, Li, S. et al [79][80][81] studied the application of the Bayer processed red mud (BRM) to fill the goaf.…”

Stability Evaluation and Structural Parameters Optimization of Stope Based on Area Bearing Theory

“…It reveals the internal causes of pillar instability and failure (as shown in Figures 1 and 2). Its equilibrium equation is as follows Equation (1).…”

“…The strip mine pillar and circular mine pillar are mainly arranged in Bainiuchang Mine. The calculation Equations ( 2) and (3) for the axial compressive stress of the two types of ore pillars can be derived from Equation (1).…”

“…The inclination angle of this type of ore body is mostly 5~30 • , which is not conducive to the normal operation of trackless mining equipment such as intelligent scrapers, nor to ore-drawing under gravity of blasted ore in the stope. It is internationally recognized as the most difficult type of ore body to mine [1][2][3]. Open stoping is commonly used in the world to mine gently inclined medium-thick ore bodies [4], and its mining structural parameters are the most important indicators for balancing safe, economic and efficient recovery.…”