Optimization of Surrounding Rock Support Technology for Deep Soft Rock Roadways in Linhuan Coal Mine

Kai WANG , Qi-hao ZHANG , Zhou-zhou LU , Si-yang GUO , Peng-yu CHEN , Jia-hui REN

Science Technology and Engineering ›› 2026, Vol. 26 ›› Issue (2) : 534 -543.

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Science Technology and Engineering ›› 2026, Vol. 26 ›› Issue (2) : 534-543 DOI: 10.12404/j.issn.1671-1815.2501124
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Optimization of Surrounding Rock Support Technology for Deep Soft Rock Roadways in Linhuan Coal Mine
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Abstract

In view of the low strength, loose structure and easy breakage of the surrounding rock of deep soft rock tunnels, in order to solve the surrounding rock control problem of such tunnels, the transportation uphill in the eighth mining area of Linhuan Coal Mine was taken as the research object. The deformation and failure characteristics and influencing factors of the tunnel surrounding rock were analyzed by comprehensive use of field observation, borehole peeping, numerical simulation and field industrial test. Three support schemes were proposed. The displacement and plastic zone of the tunnel surrounding rock under the three support schemes and the unsupported state were compared and analyzed using FLAC3D numerical simulation software, and the best support scheme was tested in the field. The results show that the tunnel surrounding rock is mainly characterized by the development of joints and fissures, looseness and fragmentation, and a large range of loosening circle. The main factors of deformation and failure are low strength of surrounding rock, high ground stress and unreasonable support method. Through numerical simulation, it is concluded that the “anchor mesh cable spraying+grouting” combined support scheme has the best surrounding rock control effect, and the support scheme is verified by field industrial test. The verification results show that the support scheme significantly improves the stability of the tunnel surrounding rock.

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Keywords

deep soft rock roadways / deformation and failure / surrounding rock control / support technology

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Kai WANG, Qi-hao ZHANG, Zhou-zhou LU, Si-yang GUO, Peng-yu CHEN, Jia-hui REN. Optimization of Surrounding Rock Support Technology for Deep Soft Rock Roadways in Linhuan Coal Mine. Science Technology and Engineering, 2026, 26(2): 534-543 DOI:10.12404/j.issn.1671-1815.2501124

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