Application of double-yield model in numerical simulation of stability of mining filling body

Yan, Bingqian; Che, Saijie; Tannant, Dwayne D.; Ren, Fenhua; Wang, Peitao

doi:10.1007/s12517-019-4679-3

Cited by 7 publications

(5 citation statements)

References 30 publications

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“…Based on the double-yield model (Yan et al, 2019), the collapsed and backfilled rock showed strain-hardening characteristics and was able to bear pressure again. The simulated plasticity diagram of the upper coal seam after collapse and recompaction is shown in Figure 2, and the results confirm the existence of intact rock in the #9 coal roof.…”

Section: Verification Of Failure Characteristics By Numerical Simulationmentioning

confidence: 99%

Research on the coupled support technology of a composite rock beam-retained roadway roof under close coal seams

Li,

Yang,

Zhu

et al. 2023

Front. Ecol. Evol.

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IntroductionThe technology of gob-side entry retaining without coal pillars in close (distance) coal seams is still immature, and the roof control and support technology in this case is not perfect.MethodsIn this paper, the coupled support technology of a composite rock beam roof under close coal seams is systematically studied by using theoretical analysis, numerical simulation and field test.ResultsBoth the floor slip calculation results and numerical simulations indicate that the vertical failure depth in the plastic zone of the #8 coal seam has not penetrated the roof of the #9 coal seam after mining, which is consistent with the field electronic imaging results. A theoretical formula for a composite rock beam model anchored by high-prestressed anchor cables was derived, and a formula for the optimal spacing of anchor cables under noncompressive shear failure of the roof was obtained. Identification of the internal stress hazard region of the rock beam provides a basis for determining the locations of vertical support. Through numerical simulation of different support schemes, including roof cutting, arrangement of high-prestressed anchor cables, and setting up of vertical supports, roof cutting was found to effectively reduce the stress of supporting structure and roof pressure. Setting up of vertical supports can reduce the roof convergence by 25.2%, and coupling with anchor cables can reduce the convergence by more than 49.1%. The feasibility of this support scheme was verified through field tests, with a maximum convergence of 99 mm between the roof and floor.DiscussionThis two-way verification approach, in which the damage degree of the roof of a close coal seam is analyzed through multiple means, targeted support plans are proposed, the support mechanisms are explored, and feedback is conducted through field tests, plays a certain guiding role in solving roof control of the gob-side entry retaining under similar geological conditions.

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Section: Verification Of Failure Characteristics By Numerical Simulationmentioning

confidence: 99%

Research on the coupled support technology of a composite rock beam-retained roadway roof under close coal seams

Li,

Yang,

Zhu

et al. 2023

Front. Ecol. Evol.

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“…e numerical simulation experiment of geotechnical engineering is a means to simulate the mechanical behavior of rock mass and engineering structure in the process of geotechnical engineering activities and natural environment changes [16][17][18][19]. Yan et al [20] studied the criteria, yield function, and softening parameters of the double yield model. According to the mechanical parameters of the filling body in Xincheng Gold Mine, the simulation parameters of the double yield model are obtained.…”

Section: Instructionmentioning

confidence: 99%

Influence of Mechanical Properties of Filling Paste on Overlying Strata Movement and Surface Settlement

Liu

Zhu

et al. 2022

Shock and Vibration

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In order to study the relationship between coal seam buried depth and surface subsidence and select appropriate filling materials, taking Donggou coal mine as the engineering geological prototype, through mechanical test and theoretical analysis, this paper studies the distribution characteristics of in-situ stress and the selection of paste filling materials and their proportion test. The influence of different filling strengths on the overburden movement law and surface settlement law of the working face is analyzed. Based on the experimental research and measured research results, the appropriate filling material is selected. The numerical results show that the material ratio scheme 4 can meet the actual needs of surface subsidence in the process of filling mining. At the same time, the surface subsidence value decreases with the increase of coal seam buried depth.

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“…Previous researches have obtained some achievements on backfill mining technology by developing new-type backfill material and improving mechanized level. However, some critical issues, such as high cost, low stability, and adverse ventilation, still restrict the large-scale application of downward route backfill method 10 , 11 . Thus, the present study focuses on the stability of surrounding rock in downward mining route supported by slab-wall backfill structure.…”

Section: Introductionmentioning

confidence: 99%

Stability assessment of surrounding rock in downward mining route supported by slab-wall backfill structure

Yin,

Yang,

et al. 2024

Sci Rep

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Characteristic of ground pressure in surrounding rock is generally considered as the theoretical basis of parameter optimization for stope structure and technology. To explore the feasibility of efficient method for the second-step downward route backfill stopes in Shanjin gold mine, various numerical simulation methods were used to investigate the effect of slab-wall backfill structure on stability of surrounding rock in downward route mining system. The maximum principal stress, artificial false roof stress, and displacement were analyzed to evaluate the level of ground pressure in different mining areas. These results indicate the optimized structural parameters for backfill stopes, which may also provide a low-cost way to achieve a high safety for downward route mining system.

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Application of double-yield model in numerical simulation of stability of mining filling body

Cited by 7 publications

References 30 publications

Research on the coupled support technology of a composite rock beam-retained roadway roof under close coal seams

Research on the coupled support technology of a composite rock beam-retained roadway roof under close coal seams

Influence of Mechanical Properties of Filling Paste on Overlying Strata Movement and Surface Settlement

Stability assessment of surrounding rock in downward mining route supported by slab-wall backfill structure

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