Arching within hydraulic fill stopes

Pirapakaran, Kandiah; Sivakugan, Nagaratnam

doi:10.1007/s10706-006-0003-6

Cited by 82 publications

(34 citation statements)

References 10 publications

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“…3 shows the vertical stress distribution within the stope and the surrounding rock. Our results showing a non-uniform stress distribution across the stope width are similar to Li and Aubertin [15] and Pirapakaran and Sivakugan [10]. Fig.…”

Section: Numerical Results and Validationsupporting

confidence: 88%

“…Numerical simulation of the stress distribution within the backfill material and the surrounding rocks is the first essential step in backfill design [10]. In this paper, we develop a numerical model of a typical stope, and analyze the impact of geometrical and mechanical parameters on the stress distribution.…”

Section: Introductionmentioning

confidence: 99%

“…The arching effects in narrow stope backfills have been studied using FLAC and PHASES2 numerical simulators [14,[27][28]. Pirapakaran and Sivakugan [10] compared numerical models of arching effects in a stope backfill in narrow and circular stopes and compared their results with available analytical solutions. More field tests and numerical modeling results on stress distribution and arching effects are found in the literature [29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of Stress Distributions in Stope Backfills

Chen

Dai

et al. 2018

Period. Polytech. Civil Eng.

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Section: Numerical Results and Validationsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of Stress Distributions in Stope Backfills

Chen

Dai

et al. 2018

Period. Polytech. Civil Eng.

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“…Near the center of a vertical backfilled mine stope, the K value has sometimes been associated with the at-rest earth pressure coefficient K 0 [23][24][25][26][27], whereas others have stated that the Rankine's active earth pressure coefficient K a is more representative [21,22,[28][29][30]. Recently, Yang [31] performed numerical simulations to help clarify this debated issue.…”

Section: Introductionmentioning

confidence: 99%

Stress Ratios in Entire Mine Stopes with Cohesionless Backfill: A Numerical Study

Yang

Aubertin

2017

Minerals

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Evaluation of stress states in backfilled mine stopes (or similar openings), using arching theory, can be largely impacted by the value selected for the earth pressure coefficient, K = σ h /σ v . Recently, the current study's authors addressed the debate about the value of K near the opening center, based on Rankine's active coefficient (K a ) and at-rest coefficient (K 0 ). Here, stress ratios in vertical backfilled stopes are numerically assessed (in two dimension, 2D), considering both the independent and related backfill internal friction angle (ϕ ) and Poisson's ratio (ν). Emphasis is placed on the backfill state near stope walls, where local rotation of stresses occurs, so the coefficient (K) and principal stress ratio, K ps (= σ 3 /σ 1 ), should be distinguished. Parametric analyses indicate that values of K and K ps depend on the position and the relationship between ϕ and ν. Near the opening center, K (= K ps ) is close to K a when ν or ϕ is below a critical value; otherwise the value approaches K 0 , defined from ν. Near both walls, K ps is always close to K a , while K is near K 0 for related ν − ϕ cases and depends on their respective values for independent ν and ϕ . Additional simulations conducted with interface elements indicate that the stress ratios near the opening center line are insensitive to interface roughness and are almost identical to values obtained without interfaces, but the stress ratios near walls may change for less rough or smooth interfaces.

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“…These include numerical modelling of arching effects [15,16,23] and analytical solution developments that take into account the third dimension [17][18][19]35], wall inclination [26,[36][37][38][39], pore water pressure [21,22], and non-uniform stress distribution [20,24]. Although these analytical and numerical solutions constitute useful tools in the design of civil infrastructure and mining backfill, their validity by experimental tests becomes a critical concern.…”

Section: Introductionmentioning

confidence: 99%

Stress Distribution in a Cohesionless Backfill Poured in a Silo

Li¹,

Aubertin

Dubé³

2014

TOCIEJ

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Abstract:The field of infrastructure rehabilitation and development requires a better understanding of soil-structure interactions. The interaction behaviour between soil and structures has mostly been investigated through theoretical and/or numerical analysis. This paper presents a series of experiments performed on an intermediate-scale physical model made of an instrumented silo. In contrast to most reported laboratory tests, both the horizontal and vertical stresses were monitored during backfilling operations realised by wild pouring. Drop tests were performed to investigate the density variation with respect to the drop (or falling) height of the soil, which were introduced in the pressure interpretation. The results showed that horizontal stress in the direction parallel to the pouring plane is larger than that perpendicular to the pouring plane. Apparently, the vertical stress is well-described using the arching solution by considering the backfill in an active state, whereas the horizontal stress perpendicular to the pouring plane is better described with the arching solution by considering the backfill in an at-rest state. An estimate of the earth pressure coefficients based on the measured vertical and horizontal stresses indicates, however, that the backfill was closer to an at-rest state in the direction perpendicular to the pouring plane, whereas in the direction parallel to the pouring plane, it was in a state between at-rest and passive. These results indicate that it is important to measure both the horizontal and vertical stresses to obtain a whole picture of the state of the backfill. The results showed also that the horizontal stresses can be larger than those calculated by the overburden solution, probably due to dynamic loading by drop mass during the filling operation and stress lock.

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Arching within hydraulic fill stopes

Cited by 82 publications

References 10 publications

Numerical Investigation of Stress Distributions in Stope Backfills

Numerical Investigation of Stress Distributions in Stope Backfills

Stress Ratios in Entire Mine Stopes with Cohesionless Backfill: A Numerical Study

Stress Distribution in a Cohesionless Backfill Poured in a Silo

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