Research of Mining Method for Difficult-to-Mine Ore Bodies in Deep Mine

Abstract:

There are many problems such as depth, high in-situ stress, high ground temperature and rockburst proneness etc. in deep mining. And it is an acknowledged and urgent mining technical puzzle about mining method of gently inclined and medium-thick ore bodies. For such an ore body in West wing of Dongguashan copper mine, if we use traditional mining method, it is hard to conquer such difficulties as high in-situ stress, large open area in roof, removal of mined ore by gravity etc. The theory of “large panel and lower sublevel height” will be easy to solve such problems. This paper use numerical technology to analyze and compare the technical and economical effectiveness for different selected mining method and its structure. The sublevel (at a height of 12 m) open stoping with back-filling by extraction in two steps is quite suitable for ensuring safety, increasing efficiency, productivity and reclaiming resource. The selected method is feasible and well worth spread.

• Periodical: Advanced Materials Research (Volumes 962-965)
• Pages: 1041-1046
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.962-965.1041
• Online since: June 2014
• Authors: Qi Fa Ge, Xue Sen Sun, Wei Gen Zhu, Qing Gang Chen
• Keywords: Deep-Mining, Gently Inclined and Medium-Thick Ore Bodies, High In Situ Stress, Large Panel and Lower Sublevel Height, Stoping Stability, Sublevel Open Stoping with Back-Filling

References

[1] Pathak J, Udd J E. Hardrock underground mining in 21st century[A]. (1993).

[2] Scott A. Shuey. Remote Mining Technology [J]. Engineering and Mining Journal, 2002, (1): 24 ~ 27.

[3] Yu Runcang. Mining Engineer's Handbook [M]. Metallurgical Industry Press, 2009. (in Chinese).

[4] China ENFI Engineering Corporation. The feasibility study report of mining project on Dongguashan West Wing Orebody[R], 2010. (in Chinese).

[5] Ren Jianping, Yang Yuping DengLiang. Present Minining Situation of Inclined Medium Thickness Ore Body at Home and Abroad and Development Trend[J] (in Chinese). MORDEN MINING, June 2009: 1~4. (in Chinese).

[6] Li Dongqing, Wang Liguan. The theory and technology of large scale hard rock mining in deep mine[M]. Metallurgical Industry Press, 2009. (in Chinese).

[7] Guo Ran, Pan Changliang, Yu Runcang. The theory and technology of hard rock mining with rockburst tendency[M]. Metallurgical Industry Press, 2003. (in Chinese).

[8] Itasca Consulting Group Inc. FLAC-Fast Lagrangian Analysis of Continua[M]. Version 3, 1992: 1~70. (in Chinese).

[9] Meng Wenquan. Selection and optimization of bottom texture for open and delayed filling stoping at donguashan copper mine[J]. MINING&METALLURGY. December 2004 , 13(4): 4~7. (in Chinese).