Study on Deformation and Supporting Measures of Mining Roadway with Compound Roof

Dong, Hongjuan; Zhang, Jinshan; Zhang, Feng

doi:10.1007/s10706-021-01974-x

Cited by 4 publications

(2 citation statements)

References 30 publications

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“…Kang 10 and other scholars believe that the roof of the top coal roadway belongs to the composite roof. Dong 11 obtained the support form and support parameters of the composite roof by using RFPA 2D software simulation. Hong 12 used FLAC 3D numerical simulation software to analyze the influence of bolt preload and spacing on the anchoring strength of surrounding rock.…”

Section: Introductionmentioning

confidence: 99%

Supporting optimization of thick seam roadway with top coal based on orthogonal matrix analysis

Jia

Fan

et al. 2023

Sci Rep

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Aiming at the problem of large deformation and difficulty in surrounding rock control of the top coal roadway in thick seam, theoretical analysis, theoretical analysis, numerical simulation, orthogonal matrix analysis and other methods were used to study the roof deformation and support parameter optimization of the top coal roadway in thick seam. Firstly, the structural model and roof mechanical model of the top coal roadway in thick seam were established, and the deformation coefficient TK was defined based on the relationship between curvature radius and bending moment, maximum bending moment and ultimate tensile strength of beam. According to the ratio of deformation rate between TK and beam to determine the roof deformation mode of top coal roadway, the discriminant conditions of roadway roof stability under two deformation conditions are obtained. Due to the characteristics of serious coal-rock fragmentation, large roof deformation, and integration of top coal and side coal. Therefore, the combined support method of “high prestressed long and short anchor cables” is proposed by double arch bearing structure control technology. Finally, based on the orthogonal matrix analysis method of supporting parameters optimization of the top coal roadway in thick seam, the analysis amount of supporting scheme is significantly reduced, the comprehensive evaluation of multi-factor and multi-supporting effect of roadway support is realized, and the optimal supporting scheme is obtained. Compared with the surrounding rock of the roadway without support, the deformation of the roof is reduced by 27.27%, the deformation of the two sides is reduced by 45.24%, and the tensile failure volume is reduced by 54.66%. The top coal roadway in thick seam has been effectively controlled, which provides guarantee for high yield and high efficiency of the mine.

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Section: Introductionmentioning

confidence: 99%

Supporting optimization of thick seam roadway with top coal based on orthogonal matrix analysis

Jia

Fan

et al. 2023

Sci Rep

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“…Jiang et al [20] studied the roofcaving failure mechanism in the water-rich rock surrounding roadways based on plastic mechanics by analysing the law of effects of the various mechanical parameters on roof failure. Dong et al [21] studied the distribution characteristics of the surrounding rock fracture zone in mining roadways with composite roofs and constrained the large deformations in the rock surrounding roadways through the combined "bolt + anchor cable + metal mesh" support technique. Kang et al [22] built a mechanical model of sliding floor heave and determined the relation between the critical damage depth of roadway floors and the minimum support depths.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Pressure Manifestation Mechanism and Control Techniques for Roadways with Large Mining Heights and Intense Mining: A Case Study

Gao

2023

Geofluids

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Responding to severe surrounding rock deformation failures and other problems in roadways in western China with large mining heights and intense mining, the work presented in this paper studied the mechanism of surrounding rock deformation failures in roadways with dynamic pressure through field investigations, theoretical analysis, and numerical simulation. According to the research findings, mining roadway deformation failures are affected by roadway layout orientation, working face mining intensity, and dynamic load disturbances from roof breakage. Coal pillars, as bridges connecting the roof and floor, constitute the energy transfer path near roadways surrounding rock, and an unreasonable coal pillar size and lateral overhanging roof structure may aggravate static load energy accumulation in the roadway surrounding rock. Roadway protection with small or large coal pillars may increase elastic energy loss in the energy transfer path; a reasonable size of small and large coal pillars is 15 m and 35 m, respectively. Using roof cutting for pressure relief may reduce the elastic energy of roadway surrounding rock by 14.35-26.33% during primary mining and 21.57-29.31% during secondary mining, thereby reducing the static load elastic energy in the surrounding rock and improving the stability of roadway surrounding rock.

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Composite roof stability control in a short-distance coal seam under goaf: a case study

Yao

et al. 2022

Arab J Geosci

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Study on Deformation and Supporting Measures of Mining Roadway with Compound Roof

Cited by 4 publications

References 30 publications

Supporting optimization of thick seam roadway with top coal based on orthogonal matrix analysis

Supporting optimization of thick seam roadway with top coal based on orthogonal matrix analysis

Dynamic Pressure Manifestation Mechanism and Control Techniques for Roadways with Large Mining Heights and Intense Mining: A Case Study

Composite roof stability control in a short-distance coal seam under goaf: a case study

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