Research on Stress Distribution Characteristics for Uniquely Shaped Roadway with Hard Roof in Steeply Inclined Coal Seam and Support Technology of Reducing Vibration Impact

Zhang, Junhui; Hui, Chen; Shi, Xiuzhi; Guan, Weiming; Sun, Xiuting

doi:10.1155/2021/2785479

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…The pre-crack of advance blasting was ~70 m away from the working face. The W steel strip made the roof connection structure an interrelated whole, which played a better bearing role [33]. As an effective blasting method, pressure relief blasting is widely used.…”

Section: Engineering Application and Effect Analysismentioning

confidence: 99%

A Safe and Efficient Mining Method with Reasonable Stress Release and Surface Ecological Protection

Zhang

Chen

et al. 2022

Sustainability

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Coal is an important basic energy source, widely distributed throughout the world, but resource abundance is uneven. Despite the need to develop and form new energy sources, coal energy maintains its dominant position. However, due to the uneven distribution and non-renewable nature of coal resources, the relationship between the supply and demand of coal resources is tight. The rational exploitation of coal and reducing resource mining wastes are particularly important at the present stage. The original mining method of the Zhangjiamao coal mine resulted in a large waste of coal resources. After replacing the “110 construction method”, the original advanced end-support was canceled, which saved a lot of process time and engineering costs and greatly improved the mine production efficiency. With an average mining depth of +300 m, the working face is in a safe and stable state, and the 110-mining process has little impact on surface subsidence. Its successful application provides a reference experience for other mines to promote resource-saving and efficient mining.

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Section: Engineering Application and Effect Analysismentioning

confidence: 99%

A Safe and Efficient Mining Method with Reasonable Stress Release and Surface Ecological Protection

Zhang

Chen

et al. 2022

Sustainability

Self Cite

View full text Add to dashboard Cite

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Analysis of Stress and Deformation on Surrounding Rock Mass of a Trapezoidal Roadway in a Large Inclination Coal Seam and Novel High Yielding Prop Support: A Case Study

Yang

Liu

et al. 2023

Mathematics

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Trapezoidal roadways in large inclination coal seams show asymmetrical tectonic characteristics, while there is still a lack of theoretical results on stress, deformation, and efficient and effective supporting methods on high walls. In this paper, based on the geological characteristics of a large, inclined coal seam roadway, a mechanical model for stress–deformation analysis of trapezoidal section roadway was established. Complex analysis and a comfort map were employed to investigate the stress and deformation distribution on the roadway surface, and a novel yielding prop with high load capacity and constant working resistance was employed to support a high wall side based on analytical results. The results are as follows: (1) The deformation of the high wall is larger than that of the low wall, and the deformation of the roof is larger than that of the floor. The overall deformation of the surrounding rock shows that the rib closure is larger than the roof-to-floor closure. (2) The stress of the surrounding rock shows that both horizontal and vertical stresses are highest in the upper corner, indicating that the broken zone is most likely to occur at this location. (3) A new support employed with a high-yielding prop and a high-strength cable in a large, inclined angle roadway is proposed. On-site experiments were conducted in a large 5-1081 roadway of a coal mine in Shanxi, China. Under the influence of mining disturbance, the deformations at the top corner decreased by 40% compared with before. The test results show that the new support scheme can effectively control the development of roadway deformation and damage during the mining process. The new support also shows friendly environmental support and fast installation.

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Research on Stress Distribution Characteristics for Uniquely Shaped Roadway with Hard Roof in Steeply Inclined Coal Seam and Support Technology of Reducing Vibration Impact

Cited by 2 publications

References 11 publications

A Safe and Efficient Mining Method with Reasonable Stress Release and Surface Ecological Protection

A Safe and Efficient Mining Method with Reasonable Stress Release and Surface Ecological Protection

Analysis of Stress and Deformation on Surrounding Rock Mass of a Trapezoidal Roadway in a Large Inclination Coal Seam and Novel High Yielding Prop Support: A Case Study

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