Stope Parameters Optimization of Non-pillar Longhole Retreat Caving

doi:10.12068/j.issn.1005-3026.2016.04.026

Abstract

Abstract: In order to realize safe and efficient mining of non-pillar longhole retreat caving in a lead-zinc mine， stope parameters optimization was conducted. Field measurement of in-situ stress was carried out on-650m level， and a numerical model was constructed by Surpac-FLAC^3D modeling technique. On these grounds， in-situ stress field was inversed by multiple regression method. The change relation of roof stability with stope parameters was obtained by using the small thin elastic mechanics theory， and the primary stope parameters schemes were put forward by combining with actual mining condition. Based on the inversion of ground stress field， the mining numerical analysis of primary schemes was conducted to get mechanical response indexes of different schemes. The safety and economy indexes were comprehensively considered， and the multi-objective TOPSIS decision method was introduced， the superior order of parameter schemes was determined by calculating the vector similarity of evaluation indexes set to ideal solution. Optimal stope parameters of non-pillar longhole retreat caving were finally determined， i.e.， chamber width 10m， pillar width 8m.

Key words: in-situ stress field, stope parameter, elastic mechanics, numerical analysis, TOPSIS decision

CLC Number:

TD853

WANG Wei， LUO Zhou-quan， QIN Ya-guang， SUN Yang. Stope Parameters Optimization of Non-pillar Longhole Retreat Caving[J]. Journal of Northeastern University Natural Science, 2016, 37(4): 578-582.

References

[1]Henry B，Jung S J，Lim H W.Room and pillar stope design in highly fractured area［J］.International Journal of Rock Mechanics and Mining Sciences，1997，34(3):674-678.
[2]Zhao X D，Li L C，Tang C A，et al.Stability of boundary pillars in transition from open pit to underground mining［J］.Journal of Central South University，2012，19(11):3256-3265.
[3]罗周全，管佳林，冯富康，等.盘区隔离矿柱采场结构参数数值优化［J］.采矿与安全工程学报，2012，29(2):261-264.(Luo Zhou-quan，Guan Jia-lin，Feng Fu-kang，et al.Stope structural parameters of panel isolation pillar numerical optimization［J］.Journal of Mining & Safety Engineering，2012，29(2):261-264.)
[4]吴爱祥，武力聪，刘晓辉，等.无底柱分段崩落法结构参数研究［J］.中南大学学报(自然科学版)，2012，43(5):1845-1850.(Wu Ai-xiang，Wu Li-cong，Liu Xiao-hui，et al.Study on structural parameters of sublevel caving［J］.Journal of Central South University(Science and Technology)，2012，43(5):1845-1850.)
[5]Luo Y Z，Wu A X，Liu X P，et al.Stability and reliability of pit slopes in surface mining combined with underground mining in Tonglushan mine［J］.Journal of Central South University，2004，11 (4):434-439.
[6]Chen F，Xu G，Ma C D，et al.Thermal residual stress of polycrystalline diamond compacts［J］.Transactions of Nonferrous Metals Society of China，2010，20(2):227-232.
[7]Luo Z Q，Xie C Y，Jia N，et al.Safe roof thickness and span of stope under complex filling body［J］.Journal of Central South University，2013，20(12):3641-3647.
[8]Li K，Wang Y Y，Huang X C.DDM regression analysis of the in-situ stress field in a non-linear fault zone［J］.International Journal of Minerals，Metallurgy and Materials，2012，19(7):567-573.
[9]Jiang Y，Wang Z L，Chu J X，et al.Study on the application of the fundamental statistic methods of SPSS in efficiency analysis of quercetin and resveratrol mixture［J］.Advances in Information Sciences and Service Sciences，2012，17(4):380-387.
[10]Grasselli G.3D Behavior of bolted rock joints:experimental and numerical study［J］.International Journal of Rock Mechanics & Mining Sciences，2005，42(1):13-24.
[11]Zheng T S，Hasebe N.Calculation of equilibrium position and dynamic coefficients of a journal bearing using free boundary theory［J］.ASME Journal of Tribology，2000，122(3):616-621.
[12]Torkamani M A M.Elastic-plastic analysis for cyclic loading and Tresca yield condition［J］.Computational Mechanics，1989，12(5):407-422.
[13]Lin M C，Wang C C，Chen M S，et al.Using AHP and TOPSIS approaches in customer-driven product design process［J］.Computers in Industry，2008，59(1):17-31.