Failure mechanism and control technology of deep soft-rock roadways: Numerical simulation and field study
Large deformations such as roof subsidence, floor heave, and two-sided deformations occur frequently in deep soft-rock roadways. The deformation becomes more severe under the combined effect of high in-situ and mining-induced stresses, which detrimentally affect the safe mining of coal. Based on the...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2023-10-01
|
| Series: | Underground Space |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2467967423000442 |
| _version_ | 1797690241901920256 |
|---|---|
| author | Ningkang Meng Jianbiao Bai Chungsik Yoo |
| author_facet | Ningkang Meng Jianbiao Bai Chungsik Yoo |
| author_sort | Ningkang Meng |
| collection | DOAJ |
| description | Large deformations such as roof subsidence, floor heave, and two-sided deformations occur frequently in deep soft-rock roadways. The deformation becomes more severe under the combined effect of high in-situ and mining-induced stresses, which detrimentally affect the safe mining of coal. Based on the geological conditions and roadway failure characteristics of the Nanyaotou coal mine in Shanxi province, China, we used comprehensive numerical simulations and field observations to study roadway deformation and failure. The deformation mechanism of deep soft-rock roadways under dynamic pressures is described, and the corresponding control measures are proposed. The deformation and fracture development characteristics of roadways surrounding rocks were explored with a primary support scheme, and its effects were evaluated. The radius of the plastic zone and the displacement deformation of the roadway were studied by using theoretical analysis, and a combined-support design of “anchor bolt + anchor cable + shotcrete + deep and shallow borehole grouting + inverted arch” was proposed to limit deformations and relieve the stress in the surrounding rocks. Numerical simulations and field monitoring showed that the combined support scheme can effectively mitigate the large deformations of ventilation roadways and provide guidance for the stable control of deep soft-rock roadways. |
| first_indexed | 2024-03-12T01:56:44Z |
| format | Article |
| id | doaj.art-f8643ea084f64f43bb99ec3eaa71c7c4 |
| institution | Directory Open Access Journal |
| issn | 2467-9674 |
| language | English |
| last_indexed | 2024-03-12T01:56:44Z |
| publishDate | 2023-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj.art-f8643ea084f64f43bb99ec3eaa71c7c42023-09-08T04:33:44ZengKeAi Communications Co., Ltd.Underground Space2467-96742023-10-0112117Failure mechanism and control technology of deep soft-rock roadways: Numerical simulation and field studyNingkang Meng0Jianbiao Bai1Chungsik Yoo2School of Mines, China University of Mining and Technology, Xuzhou 221116, China; State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Civil, Architectural Engineering & Landscape Architecture, Sungkyunkwan University, Suwon 16419, South Korea; Corresponding author.Large deformations such as roof subsidence, floor heave, and two-sided deformations occur frequently in deep soft-rock roadways. The deformation becomes more severe under the combined effect of high in-situ and mining-induced stresses, which detrimentally affect the safe mining of coal. Based on the geological conditions and roadway failure characteristics of the Nanyaotou coal mine in Shanxi province, China, we used comprehensive numerical simulations and field observations to study roadway deformation and failure. The deformation mechanism of deep soft-rock roadways under dynamic pressures is described, and the corresponding control measures are proposed. The deformation and fracture development characteristics of roadways surrounding rocks were explored with a primary support scheme, and its effects were evaluated. The radius of the plastic zone and the displacement deformation of the roadway were studied by using theoretical analysis, and a combined-support design of “anchor bolt + anchor cable + shotcrete + deep and shallow borehole grouting + inverted arch” was proposed to limit deformations and relieve the stress in the surrounding rocks. Numerical simulations and field monitoring showed that the combined support scheme can effectively mitigate the large deformations of ventilation roadways and provide guidance for the stable control of deep soft-rock roadways.http://www.sciencedirect.com/science/article/pii/S2467967423000442Deep soft-rock roadwaysLarge deformationFailure mechanismUniversal distinct element code (UDEC)Combined support |
| spellingShingle | Ningkang Meng Jianbiao Bai Chungsik Yoo Failure mechanism and control technology of deep soft-rock roadways: Numerical simulation and field study Underground Space Deep soft-rock roadways Large deformation Failure mechanism Universal distinct element code (UDEC) Combined support |
| title | Failure mechanism and control technology of deep soft-rock roadways: Numerical simulation and field study |
| title_full | Failure mechanism and control technology of deep soft-rock roadways: Numerical simulation and field study |
| title_fullStr | Failure mechanism and control technology of deep soft-rock roadways: Numerical simulation and field study |
| title_full_unstemmed | Failure mechanism and control technology of deep soft-rock roadways: Numerical simulation and field study |
| title_short | Failure mechanism and control technology of deep soft-rock roadways: Numerical simulation and field study |
| title_sort | failure mechanism and control technology of deep soft rock roadways numerical simulation and field study |
| topic | Deep soft-rock roadways Large deformation Failure mechanism Universal distinct element code (UDEC) Combined support |
| url | http://www.sciencedirect.com/science/article/pii/S2467967423000442 |
| work_keys_str_mv | AT ningkangmeng failuremechanismandcontroltechnologyofdeepsoftrockroadwaysnumericalsimulationandfieldstudy AT jianbiaobai failuremechanismandcontroltechnologyofdeepsoftrockroadwaysnumericalsimulationandfieldstudy AT chungsikyoo failuremechanismandcontroltechnologyofdeepsoftrockroadwaysnumericalsimulationandfieldstudy |