Catastrophic mass flows resulting from tailings impoundment failures

Rana, Nahyan M.; Ghahramani, Negar; Evans, Stephen G.; McDougall, Scott; Small, Andy; Take, W. Andy

doi:10.1016/j.enggeo.2021.106262

Cited by 55 publications

(12 citation statements)

References 43 publications

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“…Compiled databases (Golder Associates Ltd 2015;ICOLD 2001;Rana et al 2021) show that mine waste deposits pose a significant instability risk globally. Major failures of colliery tips and tailing dams are reported on a regular basis (Bishop 1973;Santamarina et al 2017), some of most notable ones are listed in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Coal mining wastes valorization as raw geomaterials in construction: A review with new perspectives

Nash

Galdo

et al. 2022

Journal of Cleaner Production

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Section: Introductionmentioning

confidence: 99%

Coal mining wastes valorization as raw geomaterials in construction: A review with new perspectives

Nash

Galdo

et al. 2022

Journal of Cleaner Production

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“…Mining activities and ore processing are closely linked by the generation of considerable volumes of underground voids and mine tailings, respectively (Benzaazoua et al, 2004;Hajkowicz et al, 2011). If not managed properly, these voids and tailings can bring about severe and long-term operational (e.g., ground or strata instability) (Jafari et al, 2021), environmental (e.g., heavy metal pollution) (Koohestani et al, 2018) and geotechnical risks (e.g., tailings dam failure and subsidence) (Rana et al, 2021). In recent years, technological progresses coupled with environmental regulation changes, including cemented paste backfill (CPB) system, have also triggered the development in tailings and voids management (Benzaazoua et al, 1999;Fall et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Strength Analysis and Optimization of Alkali Activated Slag Backfills Through Response Surface Methodology

Dai

Ren

et al. 2022

Front. Mater.

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The significant difference in water-to-binder ratio, activator type and concentration between alkali-activated slag (AAS) paste/mortar/concrete and AAS-based cemented paste backfill (AAS-CPB) means that previous results related to the properties and mix optimization of AAS materials cannot be directly translated to AAS-CPB. This study statistically identifies the effect of key influential variables such as silicate modulus, slag fineness and activator concentration on 3- and 28 day unconfined compressive strength (UCS) of AAS-CPB by central composite design (CCD) established in response surface methodology (RSM). In this study, the prominence of independent variables and their relations are investigated by using ANOVA (analysis of variance) having a significant level of 0.05. ANOVA results certify that there is a strong link between the level of variable contribution on UCS performance of AAS-CPB and curing age. Obviously, silicate modulus and activator concentration are the most major variables influencing UCS at 3 and 28 days, respectively. Increased fineness of slag and higher pH of pore solution enhance 3 day UCS, but restrain the further hydration of unreacted slag and subsequent the gain in strength at advanced curing ages. The combination of independent variables of silicate modulus (0.295), slag fineness (12630.2), activator concentration (0.45) gives the optimum responses.

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Section: Introductionmentioning

confidence: 99%

“…Tailings storage facility is an important integrated structure for storing tailings [1] and a major source of danger with high potential energy [2]. Due to a large number of unsaturated tailings with loose structures [2,3], it is easy to cause dam failures under continuous rainfall [4,5]. erefore, studying rainfall in ltration law of unsaturated tailings soil and establishing an accurate prediction model is of great theoretical signi cance and practical value for improving the safe and stable operation of the tailings pond under the condition of rainfall [6] and tailings pond accident prediction [3,7,8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Influencing Parameters of the Improved Model for Rainfall Infiltration in Unsaturated Tailings Soil

Yang

Hao

Cheng

et al. 2022

Advances in Civil Engineering

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The rainfall infiltration analysis method is an important method for slope stability forecast and prevention. Slope angle and unsaturated soil layers are not shown in the conventional Green-Ampt (GA) infiltration model. In this paper, based on the GA model of rainfall infiltration in tailings slopes, two aspects of slope angle and the proportion of the transition layer of the wet layer are modified. The rainfall infiltration test of unsaturated tailing soil was conducted using a self-developed large-size tailing slope model test device. The results of GA model, improved GA model, and Richards’ equation calculation model are compared. The results show that the difference between the three models is small in the free infiltration stage, but the infiltration rate is lower than that of the GA model. With the gradual increase of rainfall time into the ponding infiltration stage, the expansion depth and infiltration rate of the wetting front of the improved GA model and Richards’ equation are greater than those of the GA model. The difference between the GA model and the improved GA model and Richards’ equation for the extended depth of wetting front increases with the increase of rainfall duration, while the difference of infiltration rate changes in the opposite trend. The results of the improved GA model and Richards’ equation to calculate the expansion depth and infiltration rate of wetting fronts are consistent, and the difference basically tends to stabilize with the increase of rainfall ephemeris. The results of the improved GA model are closer to the measured data, which can provide a reference for analyzing the rainfall infiltration pattern of open pit tailing dams and slope stability research. On the basis of the improved GA model, the influence of slope angle, rain intensity, initial water content, and saturation infiltration coefficient on rainfall infiltration was analyzed, and the analysis of parameter sensitivity indexes showed that slope inclination and initial water content had a greater influence on the model.

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Catastrophic mass flows resulting from tailings impoundment failures

Cited by 55 publications

References 43 publications

Coal mining wastes valorization as raw geomaterials in construction: A review with new perspectives

Coal mining wastes valorization as raw geomaterials in construction: A review with new perspectives

Strength Analysis and Optimization of Alkali Activated Slag Backfills Through Response Surface Methodology

Analysis of Influencing Parameters of the Improved Model for Rainfall Infiltration in Unsaturated Tailings Soil

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