A new prestressed anchor-grouting reinforcement method for underground broken rock: a case study

Li, Yang; Zhang, Jinpeng; Liu, Limin

doi:10.1007/s12517-022-09831-8

Cited by 2 publications

(1 citation statement)

References 32 publications

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“…Yang et al [17] presented a flexible bolt-grouting technology of working face support aiming at the issue of collapse control of longwall working face in thick coal mining area, which has been applied in Chenmanzhuang Mine and shown that this technology can improve the stability of working face and reduce the investment cost. Yang et al [18] proposed a prestressed bolt-grouting reinforcement method for underground broken rock controlled by anchor mesh in Daxing mine rail transportation roadway, aiming at the problem that the anchor mesh could not be controlled. Wang et al [19] designed a series of bolt-grouting support contrast tests to solve the issue of roadway rock mass control in three soft coal seam in Longkou mining area, and carried out field application and implementation to verify the bolt-grouting control effect of soft rock mass in the field.…”

Section: Introductionmentioning

confidence: 99%

Failure Analysis of a Soft Broken Roadway and a New Bolt-Grouting Support Technology

Zhang,

Wang,

Guo

et al. 2023

Advances in Frontier Research on Engineering Structures

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In this paper, taking a typical roadway in broken and soft rock strata in No. 10 Mine of Pingdingshan coal field as an example, the deformation and failure mechanism of rock mass was deeply analyzed based on field testing. Then the technology of high-strength prestressed bolt-grouting support, such as the new combined high-strength grouting bolt, high-strength hollow grouting anchor cable, were developed. Based on this, a repair support scheme using the new technology was designed for on-site roadway, and was successfully implemented in the field. The monitoring results after the repair of field roadway show that the maximum of roadway surface convergence deformation is 56 mm. The maximum force of the grouting bolt is 122 kN, the grouting anchor cable is 256 kN. The new technology can fill the cracks of rock mass and the borehole interstice at the free part by using grouting materials. It can effectively enhance the self-bearing performance of soft broken rock mass on the premise of ensuring the diffusion of prestressed active supporting effect in rock mass, and then suppress the deformation and failure of roadway. The research works can provide references for the stable control and support design for roadways in soft and broken rock strata.

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Section: Introductionmentioning

confidence: 99%