The Complex Function Method Roadway Section Design of the Soft Coal Seam

Tu, Shihao; Li, Zhaoxin; Ye, Zhiwei; Zhang, Cun; Zhang, Lei

doi:10.1155/2016/9291412

Cited by 4 publications

(2 citation statements)

References 16 publications

(17 reference statements)

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“…It is confirmed that the lithology of the surrounding rock and the size of the roadway section are important factors affecting the fracture range of the surrounding rock [25]. The mechanism and influencing factors of four types of kick drums, including squeeze-fluid kick drum, flexurally folded kick drum, shear dislocation kick drum and water-expandable kick drum, were analyzed [26]. On the basis of theoretical analysis, a support design scheme was proposed [27], and an integral closed support was constructed with active supports such as bolts, anchor cables and grouting as the main body [12,13,28,29].…”

Section: Introductionmentioning

confidence: 92%

Asymmetrical Deformation Mechanisms in Layered Inclined Surrounding Rock of Roadways

Tan,

Zhan,

Zhen

et al. 2023

GSI

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In the context of layered inclined surrounding rock in roadways, this study presents a comprehensive analysis focusing on the asymmetrical deformation characteristics inherent to such geological structures. The intersection of layered surrounding rock with roadways forms the basis for constructing a deformation partition model, encompassing distinct sub-regions around the roadway. This model facilitates a detailed mechanical analysis, wherein the stress exerted on rock formations within each sub-region is meticulously examined. Consequently, specific mechanical formulas correlating to the stress in different sub-regions are established. This approach yields insights into the failure modes of the layered surrounding rock across various sub-regions. Notably, the roadway's high side predominantly exhibits tensile failure, whereas the low side is characterized by shear failure. The application of the Goodman model enables a simulation of interlayer slip occurring between the surrounding rock of the roadway, distributed across different partitions. This study delineates the deformation of the layered inclined surrounding rock road-way as a process with pronounced temporal characteristics. The progression of deformation and failure in the surrounding rock typically initiates at the tangent point between the roadway roof and the rock layer, extending to the roadway floor, the high-top bottom angle, and subsequently the low-top bottom angle. This sequence culminates in the development toward the high-top shoulder angle. The research further establishes a direct correlation between the onset of asymmetrical deformation and the angle of shear stress on the roadway surface relative to the inclination of the rock formation; a smaller angle precipitates an earlier onset of this deformation.

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Section: Introductionmentioning

confidence: 92%

Asymmetrical Deformation Mechanisms in Layered Inclined Surrounding Rock of Roadways

Tan,

Zhan,

Zhen

et al. 2023

GSI

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show abstract

“…Using a complex function, a stress distribution function was established, and the distribution characteristics of the surrounding rock stress field were determined, which could be instrumental in improving tunnel design and construction practices. Tu, S et al [10] explored the design of a flat-top U-shaped section for mining roadways in three-soft coal seams based on the complex function method, presenting the geometric parameters of such design. This work helps in addressing the challenges faced in roadway support in such coal seams, making a contribution toward safer and more efficient mining operations.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Application of Complex Function Theory in Underground Mine Design: A Case Study

Tan,

Peng,

et al. 2023

Applied Sciences

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This study, with the engineering background of the design of a stope involving a sublevel mining method in a certain underground metal mine, explored the application of stress-solving methods based on the complex variable function theory in actual engineering. Three mathematical calculation models based on the functions of a complex variable were established. Through triangle interpolation, mapping functions of a plane with a roadway section and a plane with the stope section were determined. An improved Schwarz alternating method was adopted to study the stability of the roadway and the influence of an adjacent roadway from the perspective of the stress field. In addition, in light of the distribution characteristics of a gangue in the stope, the design parameters of a pillar were optimized, with the pillar’s optimal dimensions determined. The results showed that when the magnitudes of two far-field principal stresses in the rock mass are relatively close, the distribution of the surrounding rock stress around the roadway is more uniform, and tensile stress is less likely to occur. The excavation of a neighboring roadway exacerbates to some extent the side stress of the other roadway, especially the compressive stress concentration on the side closer to the neighboring roadway. However, when the distance between the two roadways is significantly larger than the roadway size, this effect is not pronounced. In the engineering case studied in this research, the thickness of the pillar is approximately linearly positively correlated with the safety factor of the pillar approximately linearly negatively correlated with the recovery rate. Overall, this research explored the application of the complex variable function theory in an underground mine design, demonstrating its accuracy and practicality.

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Arch Height Effect and Optimal Section Selection of Strata Behavior of Straight Wall Arch Roadway Under Mining Condition

et al. 2022

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The Complex Function Method Roadway Section Design of the Soft Coal Seam

Cited by 4 publications

References 16 publications

Asymmetrical Deformation Mechanisms in Layered Inclined Surrounding Rock of Roadways

Asymmetrical Deformation Mechanisms in Layered Inclined Surrounding Rock of Roadways

Investigation of the Application of Complex Function Theory in Underground Mine Design: A Case Study

Arch Height Effect and Optimal Section Selection of Strata Behavior of Straight Wall Arch Roadway Under Mining Condition

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