Numerical simulation of rock burst processes treated as problems of dynamic instability

Zubelewicz, Aleksander; Mróz, Z.

doi:10.1007/bf01042360

Cited by 113 publications

(27 citation statements)

References 5 publications

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“…800-K0C-WIS0-00400-000-00A V-70 December 2003 The BPM is an example of a direct modeling approach in which particles and bonds are related to similar objects observed microscopically in rock [23][24][25][26][27][28][29][30]. Alternative rock models in which the material is represented as a continuum include those in [31,32], where a network of weak planes is superimposed on an otherwise homogeneous elastic continuum, and those in [33,34], where the stiffness and strength of elements in a continuum with initial heterogeneous strength are allowed to degrade based on a strength failure criterion in the form of an elastic-brittle-plastic constitutive relation.…”

Section: Introductionmentioning

confidence: 99%

Subsurface Geotechnical Parameters Report

Rigby¹,

Mrugala²,

Shideler³

et al. 2003

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Section: Introductionmentioning

confidence: 99%

Subsurface Geotechnical Parameters Report

Rigby¹,

Mrugala²,

Shideler³

et al. 2003

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“…This often results in coal mine catastrophic dynamic events, such as wind blasting, causing serious damage to mining equipment, significant mining delays, and sometimes casualties [4][5][6][7]. The hard roof is one of the main causes of a coal mine burst at the longwall face [8,9]. It is of great importance to note that in China, coal reserves under hard roofs account for about one-third of total reserves; moreover, nearly 40% of fully mechanized coal mining panels have hard roofs, and more than 50% of mining areas suffer from problems associated with hard roofs [10,11].…”

Section: Introductionmentioning

confidence: 99%

Deformation Behavior of Hard Roofs in Solid Backfill Coal Mining Using Physical Models

et al. 2017

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Solid backfill coal mining technology has been widely applied in coal seams that are at risk of hard roof. Using actual measured strain-stress curves of the backfill body and the similarity theory, this study designed and employed four experimental models for physical simulation, corresponding to roof-controlled backfilling ratios of 0%, 40%, 82.5% and 97% using the geological conditions of Face No. 6304 in the Jining No. 3 coal mine-a solid backfill coal mining face under a hard roof. A non-contact strain measurement system and pressure sensors were used to monitor the deformation of the overlying strata and changes in abutment stress ahead of the face during mining of the models for varying roof-controlled backfilling ratios. The results indicated that the solid backfill body was able to support the roof. As the roof-controlled backfilling ratio was increased, the maximum subsidence of the roof and the maximum height of the cracks decreased. When the roof-controlled backfilling ratio was 82.5% or higher, the working face did not display any obvious initial fractures or periodic fractures, and both the value and the impact range of the abutment stress ahead of the face decreased.

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“…A sudden collapse of this roof when the area of hanging roof reaches a certain value would be disastrous and could result in a shock wave or hurricane, for example [5][6][7]. Following this, mining equipment would be seriously damaged, the normal mining activities would be terminated, and casualties would occur [8,9]. Therefore, the existence of a HMR is one of the main problems affecting the safety of coal mining [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A Case Study of Presplitting Blasting Parameters of Hard and Massive Roof Based on the Interaction between Support and Overlying Strata

Zhang

Chen

2018

Energies

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Due to the existence of a hard and massive roof (HMR), severe ground pressure behaviors have been observed at the working face, resulting in safety issues and the degradation of production effectiveness. Based on the HMR conditions of the Datong Mining Area, the fracture-related instability of the HMR and its effects on the support selection were investigated by analyzing the interaction between support and overlying strata. Advancefixed-distance presplitting blasting (AFPB) technology was proposed to control the caving interval of HMR, and the influence of the controlled interval on the working load of supports was also analyzed. The working load of the support and the caving interval of the HMR were determined based on the controlled HMR fracture technology, and these were verified by field application tests. The working resistance of the support and the step distance were determined based on controlled roof fracture and were verified by on-site application experiments. The results revealed that cracks emerged after the presplitting blasting, resulting in significantly reduced strata behaviors. Furthermore, the support exhibited good adaptability.

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Numerical simulation of rock burst processes treated as problems of dynamic instability

Cited by 113 publications

References 5 publications

Subsurface Geotechnical Parameters Report

Subsurface Geotechnical Parameters Report

Deformation Behavior of Hard Roofs in Solid Backfill Coal Mining Using Physical Models

A Case Study of Presplitting Blasting Parameters of Hard and Massive Roof Based on the Interaction between Support and Overlying Strata

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