Peak loads on feeders in gravity reclaim stockpiles of broken rocks

Kramadzhyan, A. A.; Русин, Е. П.; Stazhevsky, S. B.; Хан, Г. Н.

doi:10.1134/s1062739116041309

Cited by 1 publication

(1 citation statement)

References 5 publications

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“…During tunnelling in the carbonaceous phyllite stratum, there was serious large deformation of the soft rock under high geo-stress, the primary support concrete cracked, the steel arch frame was seriously distorted and even broke o , the surrounding rock around the tunnel face lost its stability, and di erent degrees of collapse occurred, as shown in Figure 2. surrounding rock tunnel [24][25][26][27][28]. According to eld investigation, the tunnel surrounding rock is mainly carbonaceous phyllite with the characteristics of broken structure, poor mechanical properties, and a morphology that is close to granular body.…”

Section: Engineering Backgroundmentioning

confidence: 99%

Study on Instability Mechanism and Support Scheme of the Tunnel Face in Carbonaceous Phyllite Stratum under High Geo‐Stress

Song

et al. 2022

Advances in Civil Engineering

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The tunnel face collapses easily during tunnel construction in weak surrounding rock under high geo-stress. Identifying the instability mechanism of the face and proposing targeted control measures are of great importance to prevent the collapse of the face. Using the setting of the carbonaceous phyllite stratum of the Baima tunnel, a FLAC3D-PFC3D coupled model is used to analyze the influential factors on the stability of the face and optimize the original support scheme. The results show that the instability of the face is rooted in the collapse of the rock above the face, and the bench method with short cycle footage is more conducive to the stability of the face. Compared with single support mode of advanced small pipes, the combined support scheme of long bolts and small pipes can better control the displacement of the surrounding rock and prevent the collapse of the tunnel face. The numerical simulation and field surrounding rock monitoring results verify the rationality of the excavation method, the cycle footage, and the support system. This finding will be of great significance to guide design and construction in weak surrounding rock.

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Section: Engineering Backgroundmentioning

confidence: 99%

Study on Instability Mechanism and Support Scheme of the Tunnel Face in Carbonaceous Phyllite Stratum under High Geo‐Stress

Song

et al. 2022

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

Peak loads on feeders in gravity reclaim stockpiles of broken rocks

Cited by 1 publication

References 5 publications

Study on Instability Mechanism and Support Scheme of the Tunnel Face in Carbonaceous Phyllite Stratum under High Geo‐Stress

Study on Instability Mechanism and Support Scheme of the Tunnel Face in Carbonaceous Phyllite Stratum under High Geo‐Stress

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