Study on bearing capacity characteristics of steel structure support in soft rock roadway

Wu, Yabin; Hu, Jianhua; Zhang, Xuyang; Qin, Yaguang; Zhang, Zhibo; Zhao, Xing-chang

doi:10.1002/ese3.996

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…No matter which method is used to excavate the roadway, it is indispensable to support the roadway. Common support methods include timber support, metal support, reinforced concrete support, anchor spray support, etc [23]. The purpose of support is to ensure the stability and safety of roadway and prevent roadway collapse or other accidents.…”

Section: Roadway Bending Forming Processmentioning

confidence: 99%

Curve forming prediction of coal mine roadway based on RBF interpolation

2023

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Underground roadway excavation is a complex process, especially roadway curved excavation. In addition, the rationality of the design of coal mine roadway excavation scheme directly affects the speed of roadway excavation. The more reasonable the scheme design, the more conducive to rapid excavation. In order to avoid the influence of invalid construction on the efficiency of roadway excavation, this paper studies the forming of roadway bend. Based on the analysis of the tunneling process of the roadway curve, the mathematical model of the roadway curve is established. Taking the turning radius of the roadway curve as the evaluation index, the influence of various factors on the roadway curve excavation is analyzed. The research shows that the radius of the roadway curve increases with the increase of the feed rate, the working space position of the roadheader and the required width of the roadway, and decreases with the increase of the working space angle. Then, combined with the advantages of KNN algorithm, an interpolation model for calculating the radius of the curve is established based on RBF algorithm, and the radius of the tunnel curve is reconstructed and predicted. It provides a basis for the rational design of the construction process of the roadway bend and a reliable numerical algorithm for the design of the radius of the roadway bend. It also provides a theoretical basis for improving the efficiency of high roadway excavation in coal mines.

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Section: Roadway Bending Forming Processmentioning

confidence: 99%

Curve forming prediction of coal mine roadway based on RBF interpolation

2023

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“…This leads to higher requirements for the control of deep roadway surrounding rock; that is, single support cannot control large deformation of deep roadway surrounding rock [6][7][8][9]. According to the different action mechanism of the support in the control process, there are mainly reinforcement method, pressure relief method, combined support method, and so on [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Study on Mechanism and Control Technology of Asymmetric Floor Heave in a Deep Soft Rock Main Roadway

Zhai

et al. 2022

Geofluids

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Considering the serious asymmetric deformation and failure of the floor of 1# main roadway in Wanglou Coal Mine, the mechanism of roadway asymmetric floor heave was studied through on-site investigation, theoretical analysis, numerical simulation, and on-site test. The following conclusions were drawn: (1) the floor heave of 1# main roadway is mainly caused by high original rock stress, surrounding rock stress, water physical effect, support strength, etc. (2) A mechanical model of asymmetric floor heave is built and analyzed. Roadway floor stability is relevant to the stress concentration coefficient of the roadway sides, the burial depth of the roadway, and the cohesion and internal angle of friction of the floor rock. The relationship between the upward resultant force of the floor and the stress concentration coefficient of the roadway sides is established. Affected by mining, the upward force of roadway floor reaches 17.0 MPa, and serious floor heave is easy to occur when the floor is opened. (3) The floor heave curve of the position of 1# main roadway corresponding to working face is obviously asymmetric, the maximum value of floor heave being 948 mm. The floor heave curve of other positions of 1# main roadway is basically symmetric, the maximum floor heave value being merely 497 mm. A new “differentiated” combined support is proposed and field tested. It has been 13 months since the completion of main roadway repair in this section, no obvious deformation occurred, and the long-term stability of soft rock roadway support in deep mines is realized.

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Study on bearing capacity characteristics of steel structure support in soft rock roadway

Cited by 2 publications

References 9 publications

Curve forming prediction of coal mine roadway based on RBF interpolation

Curve forming prediction of coal mine roadway based on RBF interpolation

Study on Mechanism and Control Technology of Asymmetric Floor Heave in a Deep Soft Rock Main Roadway

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