Numerical simulation of abutment pressure redistribution during face advance

Klishin, S. V.; Лавриков, С. В.; Ревуженко, А. Ф.

doi:10.1063/1.5013767

Cited by 6 publications

(4 citation statements)

References 11 publications

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“…Метод дискретных элементов (МДЭ) эффективно описывает поведение гранулированных сред, состоящих из частиц произвольного размера и формы. В настоящее время данный метод получил широкое распространение при исследованиях процессов деформирования как горных пород, так и сыпучих сред [20,21]. Суть МДЭ состоит в том, что реальная среда заменяется набором дискретных частиц, между которыми постулируются определенные законы взаимодействия.…”

Section: численное моделирование процесса гравитационного движения ра...unclassified

Desining Mechanized Support Complexes With Coal Release for Underground Development of Thick Coal Seams

Клишин

Khudyntsev

2022

Vestn. Kuzbasskogo gos. teh. univ.

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Section: численное моделирование процесса гравитационного движения ра...unclassified

Desining Mechanized Support Complexes With Coal Release for Underground Development of Thick Coal Seams

Клишин

Khudyntsev

2022

Vestn. Kuzbasskogo gos. teh. univ.

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“…After mining along the longwall face, the distribution of the lateral abutment pressure affects the layout of the roadway for the adjacent working face [22][23][24][25]. The distribution of the abutment pressure before the basic roof above the roadway breaks is shown in figure 7.…”

Section: The Application Of Bctementioning

confidence: 99%

Archives of Mining Sciences

Yang,

Liu,

Bian

et al. 2021

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ApplicAtion cumulAtive tensile explosions for roof cutting in chinese underground coAl minesCumulative blasts are an important controlled blasting method used to control the propagation of cracks in the predetermined direction. however, traditional cumulative blasts are associated with long processing times and poor blasting effects. A simple blasting technology called bilateral cumulative tensile explosion (BCTE) is proposed in this paper. There are two application types where BCTE is used. The first application is used to control the stability of high-stress roadways in both Wangzhuang mine 6208 tailgate and hongqinghe mine 3-1103 tailgate. The second application is used to replace the backfill body in gob--side entry retaining (gER) in Chengjiao mine 21404 panel, Jinfeng mine 011810 panel and Zhongxing mine 1200 panel. The first application type reveals that BCTE can significantly reduce the deformation of the surrounding rock and reduce the associated maintenance cost of the roadways. Whereas the second application type, the roadway deformations are smaller, the process is simpler, and the production costs are lower, which further promotes gER and is of significance towards conserving resources.

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“…Based on the mention above, out in‐depth and detailed numerical studies on the distribution and variation in abutment stress around a stope by incorporating field monitoring, numerical simulation, and theoretical analysis have been carried . For instance, based on the analysis of anchor cable stress monitoring, support resistance monitoring, borehole stress gauge measurement, and microseismic monitoring results, the evolution law of front abutment stress in a working face was studied and summarized . By establishing a two‐dimensional nonlinear numerical model with nonuniform characteristics, a distribution law of front abutment stress was simulated and analyzed .…”

Section: Introductionmentioning

confidence: 99%

“…[15][16][17][18][19] For instance, based on the analysis of anchor cable stress monitoring, support resistance monitoring, borehole stress gauge measurement, and microseismic monitoring results, the evolution law of front abutment stress in a working face was studied and summarized. [20][21][22][23] By establishing a two-dimensional nonlinear numerical model with nonuniform characteristics, a distribution law of front abutment stress was simulated and analyzed. 24 The front abutment stress was deemed to be composed of in situ stress and mining concentrated stress, and the former is a constant pressure, while the latter is caused by a periodic failure of the main roof, which is related to the main roof failure.…”

Section: Introductionmentioning

confidence: 99%

A new theoretical method for calculating front abutment stress during coal mining

Liu

Wang

Liu

et al. 2019

Energy Science & Engineering

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The calculation of abutment stress has always been the most important topic in safe underground mining and design. In this paper, based on the formation mechanism of abutment stress, combined with the mechanical properties of actual strata and the theory of elastic foundation beams, a structure model of overlying strata with an elastic foundation is established, and a new theoretical calculation method of abutment stress is proposed. The new calculation method takes into account the interaction of the overlying key strata and the effect on the transmission of the front abutment stress and then analyzes the stress patterns of multilayered key strata under the combined action of the bending moment, shear force, and nonuniform load and its transmission to the underlying strata. In addition, based on field observations of panel 10 305 in the Xinglongzhuang coalmine, the influence range, peak position, and variation trend of the front abutment stress before and after breaking of the overlying key strata are studied and verified. The results show that the influence range of the abutment stress remains unchanged after KS1 breaks (eg, from 0 to 180 m), and its peak position shifts forward from 8 to 19 m, while the influence range (0‐180 m) and its peak position (6‐8 m in front of coal wall) remain unchanged after KS2 breaks; the abutment stress decreases, and the maximum decrease is 3.9 MPa in the range of 0‐22 m ahead of the coal wall after KS1 breaks, while the maximum decrease in the abutment stress is 2.1 MPa in the range of 0‐71 m ahead of the coal wall after KS2 breaks. The results of the new calculation method are basically consistent with the field observations and the existing theoretical results, showing that the method has good adaptability and reliability and can provide a new theoretical basis for on‐site design and construction practices.

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Numerical simulation of abutment pressure redistribution during face advance

Cited by 6 publications

References 11 publications

Desining Mechanized Support Complexes With Coal Release for Underground Development of Thick Coal Seams

Desining Mechanized Support Complexes With Coal Release for Underground Development of Thick Coal Seams

Archives of Mining Sciences

A new theoretical method for calculating front abutment stress during coal mining

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