Corrigendum to: Numerical modeling for longwall pillar design: a case study from a typical longwall panel in China

Zhang, Guangchao; Liang, Saijiang; Tan, Yunliang; Xie, Fuxing; Chen, Shaojie; Jia, Hong-guo

doi:10.1093/jge/gxz042

Cited by 3 publications

(1 citation statement)

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“…erefore, the Salamon-Munro strength formula was adopted in this study to verify the pillar numerical model. A commonly used iterative method is adopted [21,26]. e parameters of the strain-softening model are determined by matching the strength of the pillar acquired by numerical simulation with that determined by the Salamon-Munro formula.…”

Section: E Constitutive Model Of Protective Pillarsmentioning

confidence: 99%

Numerical Analysis of the Width Design of a Protective Pillar in High-Stress Roadway: A Case Study

et al. 2021

Advances in Civil Engineering

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The width design of protective pillars is an important factor affecting the stability of high-stress roadways. In this study, a novel numerical modeling approach was developed to investigate the relationship between protective pillar width and roadway stability. With the 20 m protective pillar width adopted in the field test, large deformation of roadways and serious damage to surrounding rocks occurred. According to the case study at the Wangzhuang coal mine in China, the stress changes and energy density distribution characteristics in protective pillars with various widths were analysed by numerical simulation. The modeling results indicate that, with a 20 m wide protective pillar, the peak vertical stress and energy density in the pillar are 18.5 MPa and 563.7 kJ/m3, respectively. The phenomena of stress concentration and energy accumulation were clearly observed in the simulation results, and the roadway is in a state of high stress. Under the condition of a 10 m wide protective pillar, the peak vertical stress and energy density are shifted from the pillar to roadway virgin coal region, with peak values of 9.5 MPa and 208.3 kJ/m3, respectively. The decrease in vertical stress and energy density improves the stability of the protective pillar, resulting in the roadway being in a state of low stress. Field monitoring suggested that the proposed 10 m protective pillar width can effectively control the large deformation of the surrounding rock and reduce coal bump risk. The novel numerical modeling approach and design principle of protective pillars presented in this paper can provide useful references for application in similar coal mines.

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Section: E Constitutive Model Of Protective Pillarsmentioning

confidence: 99%

Numerical Analysis of the Width Design of a Protective Pillar in High-Stress Roadway: A Case Study

et al. 2021

Advances in Civil Engineering

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Numerical investigation of failure evolution for the surrounding rock of a super‐large section chamber group in a deep coal mine

Tan

Fan

Liu

et al. 2019

Energy Science & Engineering

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The stability control of surrounding rock for a large or super‐large section chamber group is a difficult technical problem in deep mining conditions, and this stability control has become one of the most important factors restricting the safety of a large‐scale coal mine. Based on the in‐site geological conditions of a super‐large section chamber group that functions for a coal gangues separation system in the Longgu Coal Mine, we first researched the stress, deformation, and failure characteristics of the in‐site chamber group surrounding rocks by using the FLAC3D software. Simulation results showed that the maximum vertical stress, deformation, and failure range of the surrounding rock for a super‐large section chamber group are larger than those of an ordinary section chamber. In addition, the roof subsidence and the plastic zone radius at the intersection are obviously larger than that of other parts, which increase by approximately 50.8% and 44.4%, respectively. Therefore, the chamber group intersection should be taken as the key area for surrounding rock control. Then, the influences of two key parameters of the chamber group, spacing and angle, were researched in detail to help in the design of the chamber group. Results show that when the chamber spacing is 80 m, the interaction begins to occur. When the angle is 70°, the stress of the surrounding rock and roof subsidence reach the minimum. Thus, the optimum chamber group parameters are determined to be a spacing of 80 m and an angle of 70°. Finally, from the perspective of chamber group stability, the optimal chamber group parameters can better meet the normal use for the super‐large section chamber group. This research provides a reference for the design of a super‐large section chamber group under the same or similar conditions and provides a strategy for controlling the surrounding rock.

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Creep Damage Evolution Law and Stability Analysis of Remnant Coal Pillars in Longwall Goafs

Guo,

Ma,

Zong

2024

Int. J. Geomech.

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Corrigendum to: Numerical modeling for longwall pillar design: a case study from a typical longwall panel in China

Cited by 3 publications

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Numerical Analysis of the Width Design of a Protective Pillar in High-Stress Roadway: A Case Study

Numerical Analysis of the Width Design of a Protective Pillar in High-Stress Roadway: A Case Study

Numerical investigation of failure evolution for the surrounding rock of a super‐large section chamber group in a deep coal mine

Creep Damage Evolution Law and Stability Analysis of Remnant Coal Pillars in Longwall Goafs

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