Modeling and Simulation of Deformation Mechanism of Soft Rock Roadway considering the Mine Water

Chen, Yanlong; Li, Qiang; Pu, Hai; Wu, Peng; Chen, Liang; Qian, Deyu; Shi, Xuyang; Zhang, Kai; Mao, Xianbiao

doi:10.1155/2020/8812470

Cited by 2 publications

(2 citation statements)

References 35 publications

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“…Wen (Wen et al, 2021) investigated the support method for large section soft rock roadway and obtained the displacement, plastic zone, and stress field distribution law of the surrounding rock by numerical simulation. By using the numerical simulation inversion, Chen (Chen et al, 2020) reported that as the moisture content increases, the failure zone further extends to the deep surrounding rock, leading to increased stress relaxation around the roadway, especially in the roof. Wei (Zhu et al, 2022b) proposed a new concept of internal and external self-bearing structures for the surrounding rock and determined the shape of the internal and external bearing structures based on the results of field monitoring.…”

Section: Introductionmentioning

confidence: 99%

Instability and failure characteristics of surrounding rock of water drenching roadway in thick coal seam

Jia

Fan

et al. 2022

Front. Earth Sci.

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Aiming at the water drenching problem in the roof of transport roadway 2,606 of the Zhangcun coal mine, the instability and failure law of the drenching roadway was studied by borehole peephole, soaking water softening test and numerical simulation in this study. It is found that the relation between compressive strength, elastic modulus, tensile strength and moisture content is a negative exponential function. Subsequently, the Fish language was used to embed the functional relationship between mechanical parameters of surrounding rock in the roadway and moisture content into Flac3D software to simulate the failure law of surrounding rock under different moisture contents. The influence of moisture content on the surrounding rock is ordered as roof > two sides > floor. Through the comparison between borehole peeping and plastic zone, the roof water content is obtained by inversion. The results provide a reference basis for the selection of the surrounding rock support method for drenching roadway in thick coal seam.

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Section: Introductionmentioning

confidence: 99%

Instability and failure characteristics of surrounding rock of water drenching roadway in thick coal seam

Jia

Fan

et al. 2022

Front. Earth Sci.

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“…Mining disturbance also contributes to a dramatic deformation of the roadway [21,22]. Water-based erosion in a water-rich roadway reduces its strength and serviceability [23,24]. Bottom dilation is a common feature for the deformation of soft rock roadways [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Large Deformation Characteristics of Surrounding Rock and Support Technology of Shallow-Buried Soft Rock Roadway: A Case Study

Zhu

Yao

et al. 2022

Applied Sciences

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The coal resources in the coal-rich area of western China are mostly located in the late diagenetic Cretaceous and Jurassic strata. In this paper, a study on the support of soft rock roadways was carried out in the background of the soft rock track roadway in the Jiebangou coal mine. The field investigation showed that the surrounding rocks of the roadway were weak, soft, and broken, and the surrounding rocks were cemented, with the roadway local deformation exceeding 1 m. The borehole television results showed that the surrounding rocks were mainly weak sandy mudstone and yellow mudstone. The average uniaxial compressive strength of the surrounding rock was 15.49 MPa. The roadway is a shallow buried soft rock roadway; site investigation revealed that the original U-shaped steel shed had an extremely low resistance to slip, the filling body behind the U-shaped steel shed fell off, the interaction between the U-shaped steel shed and the surrounding rock was poor, the U-shaped steel shed could not provide sufficient timely support resistance, and the bearing capacity of the U-shaped steel shed was far from consideration. The floor was not effectively supported. The floor had different degrees of the bottom drum, and frequent undercover caused new stress disturbances, which loosened the bottom corners of both rock types and made the shed legs move continuously inward, reducing the bearing capacity and actual support resistance of the bracket. Numerical calculations were performed to study the deformation characteristics of the surrounding rock of the tunnel and the yielding damage characteristics of the brace. The results showed that the current U-shack support strength was insufficient, the two sides were deformed by 950 mm, the bottom of the roadway bulged by 540 mm, and the surrounding rock was mainly shear damaged. The fall of the filler behind the shed caused damage to the U-shaped steel shed spire. Through site investigation results and numerical calculations, the deformation and damage characteristics of the soft rock roadway and its damage causes were analyzed, and the support technology system of ‘strengthening support for weak structural parts’ was proposed. This improved the mechanical properties of the weak structural support body, the stress state of the local surrounding rock, and the bearing capacity of the support structure, and effectively controlled the deformation, damage, and instability of the surrounding rock of the roadway, and deformation, damage, and destabilization of the roadway, thereby achieving overall stability for the surrounding rock of the roadway.

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Modeling and Simulation of Deformation Mechanism of Soft Rock Roadway considering the Mine Water

Cited by 2 publications

References 35 publications

Instability and failure characteristics of surrounding rock of water drenching roadway in thick coal seam

Instability and failure characteristics of surrounding rock of water drenching roadway in thick coal seam

Large Deformation Characteristics of Surrounding Rock and Support Technology of Shallow-Buried Soft Rock Roadway: A Case Study

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