Large-scale field tunnel model experience and time-dependent floor heave induced by humidification

Chang, Zhou; Yan, Changgen; Xie, Wanye; Lu, Zhifang; Lan, Hengxing; Mei, Haopeng

doi:10.1016/j.tust.2024.105615

Cited by 4 publications

(1 citation statement)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moisture content has a significant influence on the floor uplift when the clay-rich materials are in the rock structure [16,17]. The swelling mechanism of floor heave may appear at high moisture content [18,19]. Moisture content can also be an additional complicating factor.…”

Section: Introductionmentioning

confidence: 99%

Numerical studies of floor heave control by the rock bolts reinforcement technology in retained gob-side gateroad

Sakhno,

Kamenets

et al. 2024

E3S Web Conf.

View full text Add to dashboard Cite

The effectiveness of modified rock bolts reinforcement technology for floor heave control in gob-side entry retaining was studied in this paper. A finite-element numerical simulation was used to analyse stress-strain state of surrounding rocks before and after immediate floor reinforcement with six floor support schemes. It was found that after immediate floor reinforcement with rock bolts with diameter 32 mm and 96 mm, floor heave in retained gob-side gateroad reduces by 2.94 – 3.6 times respectively. The modification of rock bolt reinforcement scheme by the additional installation of piles in the entry corners was proposed. Piles installation significantly reduces the zone of horizontal and vertical post-peak strains in the gateroad floor. The best variant among compared ones is a floor support scheme with two corner piles, 1 m and 2 m long. With this scheme, floor heave decreases by 3.05 times. The comparison of the materials costs of the floor support schemes were performed. As a result, the most effective floor support scheme was proposed and prospects for the further progress of floor reinforcing technologies were outlined.

show abstract