Design and numerical simulation analysis of guide support scheme for underground roadway

FANG Juejing; YANG Ke; LYU Xin

Safety in Coal Mines > 2022 > 53(11): 219-228.

FANG Juejing, YANG Ke, LYU Xin. Design and numerical simulation analysis of guide support scheme for underground roadway[J]. Safety in Coal Mines, 2022, 53(11): 219-228.

Citation:

FANG Juejing, YANG Ke, LYU Xin. Design and numerical simulation analysis of guide support scheme for underground roadway[J]. Safety in Coal Mines, 2022, 53(11): 219-228.

Citation:

FANG Juejing, YANG Ke, LYU Xin. Design and numerical simulation analysis of guide support scheme for underground roadway[J]. Safety in Coal Mines, 2022, 53(11): 219-228.

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Design and numerical simulation analysis of guide support scheme for underground roadway

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Published Date: November 19, 2022

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Abstract

Abstract

In order to effectively control the deformation and instability of roadway strike, a partial guide inclined long bolt support scheme is proposed. Through the theoretical analysis of the stress transfer process in the direction of roadway, the mechanical model of partial guide support was established, and the optimized partial guide support scheme was designed and compared with the FLAC3D numerical simulation method. The results show that the partial guide long bolt can effectively control the overall deformation of roadway, and the optimized partial guide support can reduce the local stress concentration of surrounding rock caused by the original support in roadway. At the same time, most of the damage in the roof of the roadway with inclined long anchor is relatively single, which has advantages in the secondary reinforcement and maintenance of the roadway. Through the optimization of partial guide support scheme, the use amount of steel shed is reduced by 45.45 % and support cost is reduced by 23.56 %, which verifies the feasibility of partial guide support to a certain extent.
- stress transfer,
- partial guide support,
- numerical simulation,
- strike support,
- surrounding rock deformation

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