Research on Floor Heave Mechanisms and Control Technology for Deep Dynamic Pressure Roadways

Zhu, Lei; Liu, Chengyong; Gu, Wenzhe; Yuan, Chaofeng; Wu, Yongbo; Liu, Zhicheng; Song, Tianqi; Sheng, Fengtian

doi:10.3390/pr11020467

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…Zhu L et al studied the influence of various factors on the deformation of the floor. It is considered that the influencing factors of the floor uplift are large buried depth, long duration of dynamic pressure, unique characteristics of the surrounding rock, and insufficient support strength [6,7]. Zhai Xinxian et al proposed the concept of the payload coefficient to summarize the quantitative relationship between the deformation of the perimeter rock of the bottom roadway and the payload coefficient during the cross-mining period [8].…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Mining Stress on the Sustainable Utilization of Floor Roadway in Qinan Coal Mine

Chen,

Liu,

Liu

et al. 2024

Sustainability

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Aiming at the problem of large deformations and difficult maintenance of cross-mining floor roadways, taking the track transportation roadway of the cross-mining east wing floor in Qinan Coal Mine as the engineering background, the stress field distribution of mining stress in floor strata and surrounding rock of floor roadway during the cross-mining process of the working face is studied by combining theoretical analysis with numerical simulation. The results show that the influence of mining stress on the vertical stress of floor strata is reflected in the stress-increasing area in front of the coal wall and the stress-decreasing area in the rear of the coal wall. With the increase in the depth of the floor strata, the peak value of the vertical stress gradually decreases, and the distance from the peak value of the vertical stress to the coal wall and the influence range of the vertical stress gradually increases. When the width of the coal pillar is greater than the influence range of advance abutment pressure of the working face, the development speed of the plastic zone is slow. When the roadway is located in the influence range of advance abutment pressure, the plastic zone of the roadway’s surrounding rock develops rapidly. When the working face crosses the floor roadway more than 10 m, the depth of the plastic zone of the surrounding rock of the roadway is no longer increased; the siltstone above the roadway is the key layer of fracturing, and the deformation of the roadway has been effectively improved after hydraulic fracturing. Through the analysis of numerical simulation results, the fracturing scheme has a significant effect on the stability control of the surrounding rock of the cross-mining floor roadway. This study has certain guiding significance for the maintenance and sustainable utilization of floor roadways in the cross-mining process, which is conducive to ensuring the sustainable mining of underground coal and the safety of personnel and equipment and is of great significance to the sustainable development of the coal mining industry.

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Section: Introductionmentioning

confidence: 99%

Study on the Influence of Mining Stress on the Sustainable Utilization of Floor Roadway in Qinan Coal Mine

Chen,

Liu,

Liu

et al. 2024

Sustainability

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“…Wang et al [16] studied the stress field in a side coal roadway of a goaf under the influence of mining, and they suggested a support scheme that combines "anchor cable + grouting + single pillar". Zhu et al [17] developed a mechanical model to analyze the behavior of rock beams on roadways' floors subjected to dynamic pressure, quantified the displacement when each load acted independently, and proposed a control method of "bottom crane + bottom corner anchor + floor anchor" to control roadways under dynamic pressure. Sun et al [18] studied the deformation and failure mechanism of roadways under dynamic pressure in the entire process from excavation to working face mining, and they proposed a method of combining high pre-stress constant resistance support and roof-cutting technology (HPCR-RC).…”

Section: Introductionmentioning

confidence: 99%

Research on the Failure Mechanism of Surrounding Rock in a Dynamic Pressure Roadway and Active and Passive Coordinated Support Technology

Shan,

Wei,

Wang

et al. 2024

Applied Sciences

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To study the phenomenon of large deformation and the failure of roadways under dynamic pressure, this paper takes the 10607 gas drainage roadway as the research object and presents the results of a theoretical derivation of equations for the boundary of the plastic zone of a dynamic pressure roadway with and without supporting force. The impacts of the mining influence coefficient and supporting force on the plastic zone boundary were explored for various lateral pressure coefficients. As the supporting force was increased, it was observed that there was a slight reduction in the radius of the plastic zone of the dynamic pressure roadway, while its scope and shape barely changed. Based on the failure mechanism of the dynamic pressure roadway, active and passive support technology was proposed, and the support effect was analyzed using FLAC3D 5.0 numerical simulation software for the case of the 10607 gas drainage roadway.

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“…Zhu et al [32] proposed the control method of "bottom lifting + bottom angle bolt + floor bolt" based on the results of a numerical simulation. Wang et al [33] proposed an asymmetric floor heave control scheme of "floor leveling + anchor cable support + concrete hardening" on the basis of the control principle of "roof + two sides + floor".…”

Section: Introductionmentioning

confidence: 99%

Floor Heave Control in Gob-Side Entry Retaining by Pillarless Coal Mining with Anti-Shear Pile Technology

Sakhno,

Skrzypkowski

et al. 2024

Applied Sciences

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The severe floor heave in gob-side entry retaining is the major restriction factor of the wide application of pillarless mining thin coal seams. Reinforcement and stress-relief floor heave control methods are the most promising. However, in practice, floor restoration is widely used. Therefore, floor heave control technology in gob-side entry retaining needs to be improved. This study proposes anti-shear pile technology to control floor heave in gob-side entry retaining. The research was mainly carried out by numerical simulation. It was found that the transformation of high vertical stresses in the entry floor underneath the filling wall and coal seam body into horizontal stresses starts the floor heave process. The vertical dilatancy of rocks under the roadway span and their subsequent unloading lead to the delamination of the floor strata and uplift of the entry contour. In this paper, the best pile installation scheme was found. It is a 2pile 5+2 scheme with the installation of two piles, each 2 m long. After that, it was shown that filling piles are more than 3.3 times cheaper than comparable analogs, and pile installation is less labor-intensive. The implementation of the proposed floor heave control method leads to a reduction in heaving by 2.47 times.

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Research on Floor Heave Mechanisms and Control Technology for Deep Dynamic Pressure Roadways

Cited by 6 publications

References 7 publications

Study on the Influence of Mining Stress on the Sustainable Utilization of Floor Roadway in Qinan Coal Mine

Study on the Influence of Mining Stress on the Sustainable Utilization of Floor Roadway in Qinan Coal Mine

Research on the Failure Mechanism of Surrounding Rock in a Dynamic Pressure Roadway and Active and Passive Coordinated Support Technology

Floor Heave Control in Gob-Side Entry Retaining by Pillarless Coal Mining with Anti-Shear Pile Technology

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