2022
DOI: 10.1016/j.engfailanal.2021.105905
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Disaster mechanism of tunnel face with large section in sandy dolomite stratum

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Cited by 22 publications
(4 citation statements)
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“…According to the empirical formula of the oxidation rate of bulk pyrite, the concentration of Fe 3+ produced during 2 Geofluids the oxidation and acid erosion process of black sandy dolomite differs by four orders of magnitude from the Fe 3+ concentration in the immersion solution. This difference has a weak impact on the test process and can be ignored [22][23][24].…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…According to the empirical formula of the oxidation rate of bulk pyrite, the concentration of Fe 3+ produced during 2 Geofluids the oxidation and acid erosion process of black sandy dolomite differs by four orders of magnitude from the Fe 3+ concentration in the immersion solution. This difference has a weak impact on the test process and can be ignored [22][23][24].…”
Section: Methodsmentioning
confidence: 99%
“…Sandy dolomite, a sedimentary rock primarily composed of dolomite (a calcium magnesium carbonate mineral) and sand-sized particles [1], is known for its abundant presence of pores and fissures, making it susceptible to erosion and dissolution by groundwater [2,3]. This rock type is frequently utilized in geology as a significant layer for underground water storage and transportation purposes [4].…”
Section: Introductionmentioning
confidence: 99%
“…Their results showed that the highpressure splitting method should be adopted for curtain grouting in solid sanding-dolomite layer of silty fine sand, with the final grouting pressure being recommended to set between 3-5 MPa. Moreover, Ping et al [36] analyzed the mineral composition of dolomite due to the great challenges and risks from tunnel engineering, discussed the sanding mechanism of dolomite at the macro-, meso-and micro levels, and obtained the parameters of sanding dolomite under different sanding conditions. In addition, water and sand gushings had also occurred in the dolomite sanding section of Yingpanshan tunnel of the Dali-Ruili railway.…”
Section: Introductionmentioning
confidence: 99%
“…Wang et al [31], based on the sanding phenomenon of dolomite developed from Triassic and Cambrian in five tunnels of Guizhouto, analyzed both the sanding patterns and characteristics of dolomite, proposing the reinforcement methods and solutions under the specific condition of argillaceous dolomite sanding. Based on the double-track centralized tunnel project of the Chengdu-Kunming railway, Jiang et al [35] revealed that the necessary conditions for dolomite to become sand gushings were being sandy in water environment; Zhou et al [36] investigated the Emeishan-Miyi section tunnel of the Chengdu Kunming railway extension project crossing the sandy dolomite stratum from September 2017 to November 2020, with four water and sand gushing accidents at different levels occurring at different positions of the tunnel surface. Moreover, the reconstructed Jiermu (Jixin) tunnel [37] of the Chengdu-Kunming Railway in Sichuan Province also passed through the sanding dolomite stratum of Dengying Formation of Sinian System, with "water and sand gushing" also occurring frequently in the water-rich section.…”
Section: Introductionmentioning
confidence: 99%