Mechanics and safety issues in tailing-based backfill: A review

Voids (referred to as “stopes”) are generally created during underground mining activities and can lead to both local and regional geotechnical instabilities. To assist in managing the stability of mining-related voids and improving the recovery of orebodies, tailing-based backfill technology has been widely used around the world. In the design of tailing-based backfill strategy, the specific function and engineering requirements of the filling are intimately dependent on the stress distribution within the backfilled stope. In this paper, the main mechanics involved in tailing-based backfill in underground mines, which include arching, consolidation, hydration process, and movement of surrounding rocks, are reviewed. Research on the safety of a barricade and stability of an exposed fill face are also presented. In conclusion, the back-filling process should be performed on the basis of a better understanding of the complicated interactions of the mechanisms of filling, consolidation, and hydration process (when cement is added).

[1]  Michel Aubertin,et al.  Numerical investigation of the geomechanical response of adjacent backfilled stopes , 2015 .

[2]  Joseph T. Kammerer.  A DESIGN PROCEDURE FOR DETERMINING THE CONTRIBUTION OF DECKHOUSES TO THE LONGITUDINAL STRENGTH OF SHIPS , 1966 .

[3]  Othman Nasir,et al.  Coupling binder hydration, temperature and compressive strength development of underground cemented paste backfill at early ages , 2010 .

[4]  R. J. Mitchell,et al.  Model studies on cemented tailings used in mine backfill , 1982 .

[5]  Sina Ghazi.  Modeling of an Underground Mine Backfill Barricade , 2011 .

[6]  Liang Cui,et al.  Multiphysics modeling of arching effects in fill mass , 2017 .

[7]  V. E. Price,et al.  A Numerical Method for Solving the Equations of Stability of General Slip Surfaces , 1967, Comput. J..

[8]  Andy Fourie,et al.  Cemented paste backfill for mineral tailings management: Review and future perspectives , 2019 .

[9]  R. E. Gibson.  The progress of consolidation in a clay layer increasing in thickness with time , 1958 .

[10]  Mw Grabinsky,et al.  In situ measurements of cemented paste backfill at the Cayeli Mine , 2012 .

[11]  A. Wu,et al.  Cementitious property of NaAlO2-activated Ge slag as cement supplement , 2019, International Journal of Minerals, Metallurgy and Materials.

[12]  Othman Nasir,et al.  Mechanical Behaviour of the Interface Between Cemented Tailings Backfill and Retaining Structures Under Shear Loads , 2010 .

[13]  W. F. Bawden,et al.  In-situ measurements of cemented paste backfill in long-hole stopes , 2009 .

[14]  A. A. Smith,et al.  Concrete, timber, and metals: The nature and behaviour of structural materials , 1979 .

[15]  Li Li,et al.  Interaction Between Backfill and Rock Mass in Narrow Stopes Interacción Entre el Relleno y la Masa de Roca en Excavaciones Escalonadas Estrechas , 2003 .

[16]  Andy Fourie,et al.  Numerical Modeling of Cemented Mine Backfill Deposition , 2007 .

[17]  Tikou Belem,et al.  Effects of settlement and drainage on strength development within mine paste backfill , 2002 .

[18]  N. R. Morgenstern,et al.  Extensions to the generalized method of slices for stability analysis , 1983 .

[19]  Matthew Helinski,et al.  Mechanics of mine backfill , 2007 .

[20]  Chong-chong Qi.  Big data management in the mining industry , 2020, International Journal of Minerals, Metallurgy and Materials.

[21]  Andy Fourie,et al.  Some aspects of the mechanics of arching in backfilled stopes , 2009 .

[22]  Michel Aubertin,et al.  Numerical Investigation of the Stress State in Inclined Backfilled Stopes , 2009 .

[23]  Andy Fourie,et al.  Using effective stress theory to characterize the behaviour of backfill , 2007 .

[24]  G. L. England,et al.  The Theory of One-Dimensional Consolidation of Saturated Clays , 1967 .

[25]  Sankha Widisinghe,et al.  Stress developments within a backfilled mine stope and the lateral loading on the barricade , 2014 .

[26]  M. Walske.  An experimental study of cementing paste backfill , 2014 .

[27]  Michel Aubertin,et al.  Numerical investigation of earth pressure coefficient along central line of backfilled stopes , 2017 .

[28]  Liang Cui,et al.  Modeling of pressure on retaining structures for underground fill mass , 2017 .

[29]  Andy Fourie,et al.  Coupled two-dimensional finite element modelling of mine backfilling with cemented tailings , 2010 .

[30]  K. Terzaghi.  Theoretical Soil Mechanics , 1943 .

[31]  Steve Zou,et al.  Optimizing backfill design for ground support and cost saving , 2006 .

[32]  E. De Souza,et al.  Engineering Design of Backfill Systems in Adjacent Pillar Mining , 2008 .

[33]  A Marston,et al.  THE THEORY OF EXTERNAL LOADS ON CLOSED CONDUITS IN THE LIGHT OF THE LATEST EXPERIMENTS , 1930 .

[34]  Liang Cui,et al.  A coupled thermo-hydro-mechanical-chemical model for underground cemented tailings backfill , 2015 .

[35]  Andy Fourie,et al.  Development of Specimen Curing Procedures that Account for the Influence of Effective Stress During Curing on the Strength of Cemented Mine Backfill , 2011 .

[36]  Robert L. Schiffman,et al.  The theory of one-dimensional consolidation of saturated clays. II. Finite nonlinear consolidation of thick homogeneous layers , 1981 .

[37]  Andy Fourie,et al.  Numerical Investigation of the Stress Distribution in Backfilled Stopes Considering Creep Behaviour of Rock Mass , 2019, Rock Mechanics and Rock Engineering.

[38]  Michel Aubertin,et al.  A modified solution to assess the required strength of exposed backfill in mine stopes , 2012 .

[39]  Mamadou Fall,et al.  Shear behaviour of cemented pastefill-rock interfaces , 2008 .

[40]  Joseph E. Bowles,et al.  Foundation analysis and design , 1968 .

[41]  L. Cui,et al.  Yield stress of cemented paste backfill in sub-zero environments: Experimental results , 2016 .

[42]  Liang Cui,et al.  Modeling of self‐desiccation in a cemented backfill structure , 2018 .

[43]  Li Li,et al.  Formulation of a three dimensional analytical solution to evaluate stresses in backfilled vertical narrow openings , 2005 .

[44]  D. Elmo,et al.  Experimental study on dynamic mechanical property of cemented tailings backfill under SHPB impact loading , 2019, International Journal of Minerals, Metallurgy, and Materials.

[45]  T. Belem,et al.  Study of physico-chemical and mechanical characteristics of consolidated and unconsolidated cemented paste backfills , 2013 .

[46]  Di Wu,et al.  Numerical modelling of thermally and hydraulically coupled processes in hydrating cemented tailings backfill columns , 2014 .

[47]  Andy Fourie,et al.  Neural network and particle swarm optimization for predicting the unconfined compressive strength of cemented paste backfill , 2018 .

[48]  Erol Yilmaz,et al.  Stope depth effect on field behaviour and performance of cemented paste backfills , 2018 .

[49]  T. L. Brownyard,et al.  Studies of the Physical Properties of Hardened Portland Cement Paste , 1946 .

[50]  E. Yilmaz.  Macun dolgu dayanÝmÝnÝ ve duraylÝlÝÛÝnÝ etkileyen faktšrler The factors affecting strength and stability of paste backfill , 2003 .

[51]  Leslie G. Bromwell,et al.  Design Capacity of Slurried Mineral Waste Ponds , 1983 .

[52]  M. Fall,et al.  Shear Behavior of the Interface Between Rock and Cemented Backfill: Effect of Curing Stress, Drainage Condition and Backfilling Rate , 2019, Rock Mechanics and Rock Engineering.

[53]  Robert J. Mitchell,et al.  Model studies on cemented tailings used in mine backfill , 1982 .

[54]  R. Veenstra.  A Design Procedure for Determining the In Situ Stresses of Early Age Cemented Paste Backfill , 2013 .

[55]  Nagaratnam Sivakugan,et al.  Permeability of Hydraulic Fills and Barricade Bricks , 2006 .

[56]  Xu Zhao,et al.  An analytical solution for evaluating the safety of an exposed face in a paste backfill stope incorporating the arching phenomenon , 2019, International Journal of Minerals, Metallurgy, and Materials.

[57]  James Doherty,et al.  In situ measurements of cemented paste backfilling in an operating stope at Lanfranchi Mine , 2014 .

[58]  T. Belem,et al.  Curing time effect on consolidation behaviour of cemented paste backfill containing different cement types and contents , 2015 .

[59]  Michel Aubertin,et al.  Horizontal pressure on barricades for backfilled stopes. Part I: Fully drained conditions , 2009 .

[60]  Nagaratnam Sivakugan,et al.  A laboratory model to study arching within a hydraulic fill stope , 2007 .

[61]  T. Belem,et al.  Gravity-driven 1-D consolidation of cemented paste backfill in 3-m-high columns , 2016, Innovative Infrastructure Solutions.

[62]  M. Aubertin,et al.  Horizontal pressure on barricades for backfilled stopes. Part II: Submerged conditions , 2009 .

[63]  Mostafa Benzaazoua,et al.  Design and Application of Underground Mine Paste Backfill Technology , 2008 .

[64]  Patrice Rivard,et al.  Direct shear tests on cemented paste backfill–rock wall and cemented paste backfill–backfill interfaces , 2016 .

[65]  Majidreza Nazem,et al.  The effect of rock mass gradual deterioration on the mechanism of post-mining subsidence over shallow abandoned coal mines , 2017 .

[66]  A. Fourie,et al.  Handbook on Mine FIll , 2005 .

[67]  Andy Fourie,et al.  Behavior of Cemented Paste Backfill in Two Mine Stopes: Measurements and Modeling , 2011 .

[68]  J Li,et al.  Transition from discontinuous to continuous paste filling at Cannington Mine , 2014 .

[69]  H. Janssen.  Versuche uber Getreidedruck in Silozellen , 1895 .

[70]  Dirige.  The effect of stope inclination and wall rock roughness on backfill free face stability , 2009 .

[71]  김기범.  나의 Concrete 연구실 , 2011 .

[72]  Nagaratnam Sivakugan,et al.  Geotechnical considerations in mine backfilling in Australia , 2006 .

[73]  Michel Aubertin,et al.  Influence of Water Pressure on the Stress State in Stopes with Cohesionless Backfill , 2009 .

[74]  Nagaratnam Sivakugan,et al.  Average Vertical Stresses in Underground Mine Stopes Filled with Granular Backfills , 2016, Geotechnical and Geological Engineering.

[75]  Andy Fourie,et al.  Assessment of the self-desiccation process in cemented mine backfills , 2007 .

[76]  M. Fall,et al.  Modeling the heat development in hydrating CPB structures , 2009 .