In situ investigation of mine backfill distribution system wear rates in Canadian mines

Creber, Kelvin J.; Kermani, Mehrdad; McGuinness, Maureen; Hassani, Ferri

doi:10.1080/17480930.2017.1339169

Cited by 8 publications

(2 citation statements)

References 3 publications

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“…Sharp and irregular particles cause four times more wear on pipelines than spherical particles. Creber et al [14] found that the erosion rate increases with particle size. Qiao et al [15] used Fluent software (version 2.1) to investigate the effect of roughness on pipeline erosion rate under mortar action.…”

Section: Introductionmentioning

confidence: 99%

New Model and Finite Element Analysis of the Anti-Extrusion Strength of Backfill Drilling Pipelines

Li,

Wang,

Liu

2024

Minerals

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Currently, in some domestic and foreign mines, the backfill drilling pipeline experiences a rupture phenomenon even when the wear degree is low. This results in a delay in production due to the filling becoming ‘sick’. This paper presents, for the first time, the damage mechanism from a mechanical perspective and re-derives the anti-extrusion strength model of the backfill drilling pipeline. We investigate the influence of the law on the anti-extrusion strength of pipelines from the perspective of strata and cement rings. We then verify the theoretical and simulation results through engineering examples. The results demonstrate that the Mises stress criterion is a suitable modification principle for the anti-extrusion strength model of the backfill drilling pipeline. The anti-extrusion strength of the pipeline is related to the elastic modulus and Poisson’s ratio of the stratum, and the thickness of the cement ring. It is negatively affected by the depth of the stratum. For hard strata, a cement ring with a smaller elastic modulus is suitable, while for soft stratum, a cement ring with a larger elastic modulus is recommended. When the missing angle of the cement ring is less than 60°, the stress concentration factor increases up to 2.2. The stress unloading capacity of the cement ring ranges from 32.7% to 37.8%, and optimal performance of the cement ring is achieved when it has high strength and low rigidity. The backfill filling pipeline of a copper mine abroad was destroyed due to external extrusion force exceeding its anti-extrusion strength value. The modified pipeline anti-extrusion strength model is 18.2% higher than the pipeline API strength value. This finding can inform the design of the backfill filling pipeline for China’s kilometer-deep wells in the future.

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Section: Introductionmentioning

confidence: 99%

New Model and Finite Element Analysis of the Anti-Extrusion Strength of Backfill Drilling Pipelines

Li,

Wang,

Liu

2024

Minerals

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“…These studies focus on the characteristics and key technical issues of backfill technology. These research results promote the development of backfill technology worldwide [10][11][12]. For the large-scale filling of goaf, the research and application of filling technology in George Fisher Mine (Mount Isa, Australia) in north central Australia is representative.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Lead-Smelting Slag as Paste Filling Cementing Material

2022

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Under the current pressure of mineral product price and market competition, as well as the tightening of ecological and environmental protection policies, energy saving, emission reduction and cost reduction, and efficiency increase have become inevitable trends. Lead-smelting slag of smelter, as an industrial byproduct, is harmful solid waste to be eliminated. In this research, a series of experiments on substitute for cement were done for filling cost reduction under premise of guaranteeing the filling strength, using PC32.5 cement as reference cementing material. Meanwhile, with Portland cement clinker, water quenching slag of BF ironmaking, and lead-smelting slag of smelter in different ratios, four cementing materials were made and named as cementing material I, cementing material II, cementing material III, and cementing material IV. Then, the above five cementing materials including PC32.5 cement were mixed, respectively, with tailing and water to prepare paste backfill slurry with different binder-tailing ratio and concentration. Backfill block was made and cured at 20°C; their uniaxial compressive strengths in different curing ages were measured. The result shows the strength of backfill test block using cementing material I (cement clinker and water quenching slag) without lead-smelting slag is far higher than that of test block using PC32.5 cement as cementing material. The strength of block with 16% lead-smelting slag increased dramatically, which was higher than the strength of block using PC32.5 as cementing material. However, the strength of test block decreased when the content of lead-smelting slag reached 32% and 40%. The more lead-smelting slag was added, the worse influence on strength of backfill would be. Because of large specific gravity of lead-smelting slag and low content of CaO, the hydration activity of lead-smelting slag is far lower than that of water quenching slag. Therefore, using moderate lead-smelting slag as substitute for cement will lead to increase of backfill strength and decrease filling cost.

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Corrosion Law of Q345 Steel Pipe when Transporting Tailings Paste Slurry

Wang

et al. 2022

J. of Materi Eng and Perform

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In situ investigation of mine backfill distribution system wear rates in Canadian mines

Cited by 8 publications

References 3 publications

New Model and Finite Element Analysis of the Anti-Extrusion Strength of Backfill Drilling Pipelines

New Model and Finite Element Analysis of the Anti-Extrusion Strength of Backfill Drilling Pipelines

Experimental Study on Lead-Smelting Slag as Paste Filling Cementing Material

Corrosion Law of Q345 Steel Pipe when Transporting Tailings Paste Slurry

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