Effect of combined mining with steeply dipping seam on stability of surrounding rock of inclined shaft in weakly cemented stratum

Song, Zhaoyang; Wen, Wei; Tan, Jie

doi:10.1088/1755-1315/237/3/032108

Cited by 2 publications

(1 citation statement)

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“…Zhou et al (2011) revealed that the total number of mining-induced cracks increases with the increasing of advanced lengths of mining face and the number of mining-induced cracks increases gradually before breaking of the main key stratum. Song et al (2019) studied the fractal characteristics of mining fracture distribution in rock mass and the influence of underground combined mining disturbance has little effect on the arching stage strata of the main inclined shaft. Feng et al (2017) used UDEC numerical simulation software to analyze that the upper overburden strata are mainly bed-separated fissures.…”

Section: Introductionmentioning

confidence: 99%

Evolution law of mining-induced overburden stratum stress and fracture fields in inclined coal seam

Fan

Luo

Gao

et al. 2023

WJE

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Purpose This study aims to clarify the evolution law of stress field and fracture field during the mining process of inclined coal seam, to prevent the occurrence of roof burst water and impact ground pressure accident during the advancing process of working face. Design/methodology/approach The evolution law of stress-fracture field under different mining conditions of inclined coal seam was studied by using discrete element method and similar material simulation method. Findings The overburden stress at the lower end of the coal seam was mainly transmitted to the deep rock mass on the left side, and the overburden stress at the upper end was mainly transmitted to the floor direction. With the increase of the inclined length of the mining coal seam, the development of the fracture zone gradually evolves from the “irregular arch” form to the “transversely developed trapezoid” form. The development range of the fracture zone was always in the internal area of the stress concentration shell. Originality/value An original element of this paper is based on the condition that the dip angle of coal seam is 35°, and the evolution law of overburden stress-fracture field during the excavation of coal seam with different lengths was analyzed by UDEC numerical simulation software. The coupling relationship between stress shell and fracture field was proposed, and the development range of fracture zone was determined by stress. The value of this paper is to provide technical support and practical basis for the safety production of a mine working face.

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Section: Introductionmentioning

confidence: 99%

Evolution law of mining-induced overburden stratum stress and fracture fields in inclined coal seam

Fan

Luo

Gao

et al. 2023

WJE

View full text Add to dashboard Cite

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Numerical Simulation of Deformation and Failure Mechanism of Main Inclined Shaft in Yuxi Coal Mine, China

Qin

et al. 2022

Applied Sciences

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Disturbance stresses can cause deformation and damage to a tunnel’s rock, potentially threatening the mine’s safety. This paper investigates the effects of disturbance damage on the main inclined shaft due to the excavation of an electromechanical chamber in a deep inclined shaft at Yuxi Mine. Specifically, a numerical model was constructed using Midas GTX NX and Fast Lagrangian Analysis of Continua in Three Dimensions (FLAC3D) to match the actual engineering conditions, and to reveal the stresses and deformations in the surrounding rock of the main inclined shaft before and after the excavation of the main inclined shaft, the electromechanical chamber and the head chamber. The results revealed that the surrounding rock stress around the main inclined shaft is significantly influenced by excavation disturbance. The bottom bulge occurred due to the unstable vertical and shear stresses in the bottom coal bed moving into free space. After the excavation of the electromechanical chamber, the maximum displacement of the floor can be increased from 0.35468 m to 0.64301 m, nearly doubled, and a large area of surrounding rock deformation occurs in the inclined shaft falling roadway. Affected by excavation disturbance, the maximum deformation of floor can reach 1.06 m, with a wide fluctuation range. The main area of damage to the surrounding rock was identified, except for the main inclined shaft, which occurred near the intersection of the inclined shaft and the drop level location. This area is mainly affected by superimposed tensile stress damage, prone to large area floor heave and spalling. The research content is expected to provide certain theoretical support in taking measures to deal with the deformation and failure of the surrounding rock in a main inclined shaft.

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Effect of combined mining with steeply dipping seam on stability of surrounding rock of inclined shaft in weakly cemented stratum

Cited by 2 publications

References 0 publications

Evolution law of mining-induced overburden stratum stress and fracture fields in inclined coal seam

Evolution law of mining-induced overburden stratum stress and fracture fields in inclined coal seam

Numerical Simulation of Deformation and Failure Mechanism of Main Inclined Shaft in Yuxi Coal Mine, China

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