Environmental implications of mitigating overburden failure and subsidences using paste-like backfill mining: a case study

Sui, Wanghua; Zhang, Dingyang; Cui, Zengdi; Wu, Zhaoyang; Zhao, Qihua

doi:10.1080/17480930.2014.969049

Cited by 40 publications

(16 citation statements)

References 7 publications

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“…Zhang et al [23] and Guo et al [24] proposed analytical models for predicting surface subsidence in solid backfill mining based on the equivalent mining height theory. Sui et al [25] evaluated the subsidence of Taiping Coal mine based on numerical simulation and a scale model and noted that subsidence could be mitigated by the backfilling method so as to prevent sand and water inrushes. Application of CPB in metal mine has also been investigated by a few researchers.…”

Section: Introductionmentioning

confidence: 99%

Use of Cemented Super-Fine Unclassified Tailings Backfill for Control of Subsidence

et al. 2017

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Known for its advantages in preventing geological and environmental hazards, cemented paste backfill (CPB) has become a topic of interest for scientists and mining engineers in recent decades. This paper presents the results of a study on the use of cemented super-fine tailings backfill (CSUTB) in an underground mine for control of surface subsidence. An analytical solution is developed based on the available model to calculate the required strength of backfill when in contact with non-cemented tailings (NCT). The effect of solid contents on the rheological properties of CSUTB is investigated. A reasonable mix proportion (RMP) of CSUTB is determined for Zhongguan Iron Mine (ZGIM) based on laboratory experiments. The validity of RMP in surface subsidence control is verified by a 3D numerical model. The obtained results show that CSUTB requires higher strength when in contact with NCT than when in contact with orebody. Rheological characteristics, e.g., slump, fluidity, and bleeding rate of fresh CSUTB, decrease with higher solids content, of which values with a certain solids content can be determined by quadratic polynomial regression equations. RMP with a cement to tailings (c/t) ratio of 1:10 and a solids content of 70% is recommended for ZGIM, as it shows favorable mechanical and rheological abilities. The deformation parameters (curvature, inclination, and horizontal deformation rate) obtained from numerical modeling are acceptable and lower than critical values, meaning CSUTB can feasibly be used with RMP in subsidence control.

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Section: Introductionmentioning

confidence: 99%

Use of Cemented Super-Fine Unclassified Tailings Backfill for Control of Subsidence

et al. 2017

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“…Numerous studies have attempted to address this problem [1][2][3][4][5][6] and to estimate the influence 7 with different methods. However, abandoning these underground resources also places economic pressure on the planning and development of coal enterprises.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a better technique is urgently needed to effectively control mining-induced surface subsidence and ensure sustainable development of coal resources. Numerous studies have attempted to address this problem [1][2][3][4][5][6] and to estimate the influence 7 with different methods. 8 Backfilling mining technology is a well-known technique for controlling surface deformation widely used in China and other Asian countries, 9 Poland, 10,11 and Australia [12][13][14][15] ; it solves the problem of gangue accumulation, 16,17 improves the resource recovery rate, 18,19 controls surface subsidence, 2,20 and protects buildings from collapse damage.…”

Section: Introductionmentioning

confidence: 99%

A novel short‐wall caving zone backfilling technique for controlling mining subsidence

Liu

Zhu

et al. 2019

Energy Science & Engineering

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Mining‐induced voids are the main circulation pathways for underground fluids such as water and coalbed methane. The collapse of these voids transmits to the ground surface, resulting in subsidence and building collapse. Accordingly, effective and feasible solutions are needed to control surface subsidence. In this study, a novel technique of void filling in the short‐wall caving zone was proposed to better control surface subsidence in thin coal seam mining. The width of the working face plays a key role in the proposed technique. A maximum surface subsidence value was predicted using numerical simulation and physical simulation experiments with different working face widths. The results indicate that the appropriate working face width should be less than 50 m for the studied coal mine. In this example, the surface subsidence coefficient was less than the standard value for initial damage to rural structures. Both advancing speed and productivity of the working face were achieved using the proposed technique because the filling and mining processes were conducted simultaneously on different faces. The results suggest that surface subsidence during thin coal seam mining could be controlled using the proposed technique. This technique can also help mitigate mining‐induced water inrush and gas leakage disasters by filling voids.

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“…According to Sui et al (2015b), the range of the vertical displacement values in the numerical simulation is approximately equal to the mined heights. Combining this with where the tensile failure that occurs in the plastic zone, and this is the approximate height of the caving zone.…”

Section: Numerical Simulationmentioning

confidence: 99%

Overburden Failure Associated with Mining Coal Seams in Close Proximity in Ascending and Descending Sequences Under a Large Water Body

2017

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Environmental implications of mitigating overburden failure and subsidences using paste-like backfill mining: a case study

Cited by 40 publications

References 7 publications

Use of Cemented Super-Fine Unclassified Tailings Backfill for Control of Subsidence

Use of Cemented Super-Fine Unclassified Tailings Backfill for Control of Subsidence

A novel short‐wall caving zone backfilling technique for controlling mining subsidence

Overburden Failure Associated with Mining Coal Seams in Close Proximity in Ascending and Descending Sequences Under a Large Water Body

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