Using a Pressurized Shield to Increase Face Stability of Circular Tunnels in Purely Cohesive Soil

Ding, Wenqi; Li, Shucai; Liu, Keqi; Zhu, Jian; Li, Mingjiang; Shi, Peihe

doi:10.1061/(asce)gm.1943-5622.0001208

Cited by 17 publications

(2 citation statements)

References 18 publications

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“…The overburden bearing structure during the filling stage could be analyzed applying the pressure arch theory (Han et al 2019;Wang et al 2019b;Ding et al 2018;Zha and Xu 2019). When coal seam mining follows a nearly horizontal direction, the correspondent pressure arch will be symmetrical and horizontal.…”

Section: Overburden Bearing Mechanical Modelmentioning

confidence: 99%

Conversion mechanism of a continuous pressure arch structure in strip filling mining

Shao

Wang

Li³

et al. 2021

Arab J Geosci

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Strip mining is the key technology to solve the problem of coal mining under water, so mastering the law of overburden load transfer in strip mining is the key to safe production in working face. We studied it in the context of the shallow seam No. 3 in the Shanghe Coal Mine (northern Shaanxi Province, China) through similarity simulation and field measurement analysis. A theoretical analysis, based on the concept of pressure arch, allowed the establishment of a continuous arch theoretical model for the strip coal pillars (or filling bodies) of the mine. A similar simulation study on strip filling and staged mining has previously shown that, in a first stage, the overlying strata load is mainly transferred to the remaining strip coal pillars; in a second stage, this load is mainly sustained by the odd-numbered strip coal pillars; finally, in a third stage, this load is mainly sustained by the first-stage strip filling body, while the third-stage filling body is not loaded. Our theoretical analysis showed that, during the first stage, the overlying rock load outside the arch was mainly sustained by the arch structure, while that inside of the arch was sustained by the filling body; in the second stage, the arch structure lost stability during the recovery of the even-numbered coal pillars and the arch axis developed upward, leading to the formation of a new arch with an odd number of coal pillars as the arch foot; in the third stage, after the recovery of the odd-numbered coal pillars, a new arch was formed. The arch foot of the new supporting structure was represented by the first-stage filling body; moreover, the load was mainly borne by the second-stage filling body, ensuring the stability of the overburden rock after mining. The theoretical analysis revealed that the pillar or filling body only bears part of the overburden load in strip filling mining. The pillar (filling body) load in correspondence of working face 3216 during each stage of filling was measured and analyzed, proving a continuous arch structure transformation between the pillar and the filling body. Finally, we verified the reliability of the proposed theoretical model.

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Section: Overburden Bearing Mechanical Modelmentioning

confidence: 99%

Conversion mechanism of a continuous pressure arch structure in strip filling mining

Shao

Wang

Li³

et al. 2021

Arab J Geosci

View full text Add to dashboard Cite

show abstract

“…https://doi.org/10.1061/(ASCE) GM.1943-5622.0001208 This discussion is based on the original paper by Ding et al (2018) (hereafter the authors or the original paper). The authors employed the kinematic approach of upper bound limit analysis and the slipline theory to study the undrained face stability of plane strain tunnel heading in homogeneous clays.…”

mentioning

confidence: 99%

Discussion of “Using a Pressurized Shield to Increase Face Stability of Circular Tunnels in Purely Cohesive Soil” by Wantao Ding, Shucai Li, Keqi Liu, Jian Zhu, Mingjiang Li, and Peihe Shi

Ukritchon

Keawsawasvong

2020

Int. J. Geomech.

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Feasibility Analysis of Mega Tunnel in Himalayan Region

Deshpande,

Hedaoo

2024

Lecture Notes in Civil Engineering

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Using a Pressurized Shield to Increase Face Stability of Circular Tunnels in Purely Cohesive Soil

Cited by 17 publications

References 18 publications

Conversion mechanism of a continuous pressure arch structure in strip filling mining

Conversion mechanism of a continuous pressure arch structure in strip filling mining

Discussion of “Using a Pressurized Shield to Increase Face Stability of Circular Tunnels in Purely Cohesive Soil” by Wantao Ding, Shucai Li, Keqi Liu, Jian Zhu, Mingjiang Li, and Peihe Shi

Feasibility Analysis of Mega Tunnel in Himalayan Region

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