Classification of Rockburst in Underground Projects: Comparison of Ten Supervised Learning Methods

Zhou, Jian; Li, Xibing; Mitri, Hani S.

doi:10.1061/(asce)cp.1943-5487.0000553

Cited by 319 publications

(101 citation statements)

References 64 publications

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“…What is more, backfill technology is generally utilized in pipeline transportation, therefore transportability is also a key factor that affects the choice of mixing ratio [17]. There is a series of technical problems in deep mining, with the problem of backfill pipeline transportation being a significant one [18]. For this mine, the common fluidity experiments in the laboratory, such as slump tests, diffusivity and the looping pipe experiment, however, cannot fully reflect the flow state and the pipeline resistance.…”

Section: Physicochemical Propertiesmentioning

confidence: 99%

Feasibility of Recycling Ultrafine Leaching Residue by Backfill: Experimental and CFD Approaches

et al. 2017

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Large amounts of leaching residue are released into tailings dams from mines, and their acid content can cause environmental pollution. The aim of this study was to research the feasibility and value of a leaching residue backfill recycling method. The combination of property detection, laboratory tests (the neutralization method, strength test and diffusivity test) and numerical simulation methods (3D computational fluid dynamics (CFD) simulations of pipeline transportation properties) were used to assess the performance of the leaching residue backfill. The results show that backfill body with the cement:sand mass ratio of 1:3, the leaching residue:classified tailings ratio of 1:6, and slurry mass concentration of 71 wt % can meet the strength and pipeline self-flowing transportation requirements of mine backfill. The leaching residue is a good backfill aggregate, and its recovery ratio can reach 19.5 wt %. In addition, the recycling of leaching residue effectively alleviates the problem of mine waste emissions and protects the ecological environment surrounding the mining area. This study serves as a guide for the recycling of fine tailings and the environmental governance of the mining area.

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Section: Physicochemical Propertiesmentioning

confidence: 99%

Feasibility of Recycling Ultrafine Leaching Residue by Backfill: Experimental and CFD Approaches

et al. 2017

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“…As the main material of mining and civil engineering, rock deformation and failure may cause interruption in mining and building activities, or even significant safety hazards [1][2][3]. With the growing demands for resources and the substantial increase in underground activities, rock mechanical behavior is of major importance in civil projects, mining engineering, and mineral exploration related operations [4].…”

Section: Introductionmentioning

confidence: 99%

Study on Fracture Initiation and Propagation in a Brazilian Disc with a Preexisting Crack by Digital Image Correlation Method

Luo

Qiu

et al. 2017

Advances in Materials Science and Engineering

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The effect of a preexisting crack with different inclination angles and lengths on mechanical properties, fracture initiation, and propagation in a Brazilian disc was investigated in this paper. In the experiment, digital image correlation (DIC) method was employed to record the deformation in the specimen. Different failure patterns, depending on inclination angles and lengths of the preexisting crack, were observed. The fracture initiation position deviates from the tips of the preexisting crack with the inclination angle increasing from 0 ∘ to 72 ∘ at an interval of 18 ∘ per increment. Secondary cracks are more likely to occur in the Brazilian disc with a more inclined and longer preexisting crack. A finite-discrete element combined method ELFEN was used in the numerical investigation to simulate the failure process. This investigation shows that there are good correlations between the experimental and numerical results. Digital image correlation is a good method to obtain the quantitive full-field strain distribution and to observe the strain evolution process in a jointed rock.

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“…After many years of continuous exploration and practice, paste backfill technology has been accepted and applied in numerous countries throughout the world by virtue of its advantages in terms of environmental protection, emission reduction, safety, and other aspects [6][7][8]. Backfill pipeline systems have been established in many mines as transportation systems to transport backfill material from the surface to the goaf [9].…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of Pipeline Transport Properties of Mine Tailings Three-Phase Foam Slurry Backfill

et al. 2017

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A three-dimensional backfill pipeline transport model is developed using the computational fluid dynamics (CFD) technique, which is applied to study the pipeline transport properties of three-phase foam slurry backfill (TFSB). Based on rheological property tests and CFD simulations, the foam phase, pressure, and velocity in the pipeline system are investigated using the CFD mixture method for different bubble volume fractions and bubble diameters. The simulation results indicate that TFSB can maintain a steady state during pipeline transport, experience a markedly reduced pipeline transport resistance, and exhibit better liquidity than conventional cement slurry. Furthermore, as the bubble volume fraction increases, the resistance of the pipeline decreases and the fluidity improves. By contrast, the bubble diameter has little effect on the transport properties of TFSB. The combined results of CFD simulations, slump tests, and strength tests indicate that, when the bubble volume fraction is 15-20 vol %, TFSB can satisfy the necessary strength requirements and exhibit self-flowing transport. The CFD technique provides an intuitive and accurate basis for pipeline transport research and has the potential for wider application in studies of mine backfill.

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Classification of Rockburst in Underground Projects: Comparison of Ten Supervised Learning Methods

Cited by 319 publications

References 64 publications

Feasibility of Recycling Ultrafine Leaching Residue by Backfill: Experimental and CFD Approaches

Feasibility of Recycling Ultrafine Leaching Residue by Backfill: Experimental and CFD Approaches

Study on Fracture Initiation and Propagation in a Brazilian Disc with a Preexisting Crack by Digital Image Correlation Method

CFD Simulation of Pipeline Transport Properties of Mine Tailings Three-Phase Foam Slurry Backfill

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