A Constitutive Model to Reveal the Anchorage Mechanism of Fully Bonded Bolts

Chen, Jianhang; Liu, Lei; Zeng, Banquan; Tao, Kangming; Zhang, Cun; Zhao, Hongbao; Li, Danqi; Zhang, Junwen

doi:10.1007/s00603-022-03160-8

Cited by 41 publications

(14 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…that seasonal rainfall and natural watercourses formed by valleys are the main factors of water inrush disasters in the mining process of shallow coal seams. To solve the problem of roadway water inrush and water conservation mining caused by the development of fracture zones (Zhang and López, 2019;Xie et al, 2021;Chen et al, 2022), Xie obtained five development stages of the waterconducting fracture zones. Besides, previous studies have shown that different mining methods (Du and Gao, 2017;Zhou and Yu, 2022), mining parameters (Wang et al, 2020;Qi et al, 2022) and repeated mining of coal seams (Tian et al, 2019;Cheng et al, 2020) also affect the development height of water-conducting fracture zones.…”

Section: Introductionmentioning

confidence: 99%

Study on prevention and control mechanism of runoff water hazard in thick coal seam mining in valley terrain

Zhang

Qian²,

Wang³

et al. 2023

Front. Earth Sci.

View full text Add to dashboard Cite

During the mining of thick coal seams under the gully slope, the mining-induced fractures are prone to connect with the gully runoff, which may induce potential water hazards and affect underground production. Based on the occurrence characteristics of coal seams and the landform in the gully-developed mining area, the coal seam mining under the slope of Na’er Coal Mine and Baoshan Coal Mine was taken as the engineering background, the seasonal runoff of gullies was considered as the influencing factors of the safe mining, and the spatial relationship between the working face and the gully slope was analyzed when the mining-induced fractures were connected with the gully surface and caused the gully runoff water disaster. The research results show that the occurrence structure of the gully slope has a greater impact on the strata movement of the slope. When the key layer is incomplete, the horizontal sliding and local block overturning of the slope rock strata are strong; when the key layer is complete, the horizontal sliding and local block overturning of the slope rock strata are weakened. According to the safety distance of the working face and the generalized model of safety coal pillar setting, the method of setting the safety coal pillar was used to prevent the connection of slipping cracks of the rock strata at the slope bottom and the gully surface during the slope mining, thus preventing the occurrence of runoff hazards during the thick coal seams mining in the valley terrain. The results can provide a theoretical basis and technical support for the prevention and control of seasonal runoff hazards, as well as a reference for the prevention and control of mining-induced landslides, water conservation mining, and ecological environment protection.

show abstract

Section: Introductionmentioning

confidence: 99%

Study on prevention and control mechanism of runoff water hazard in thick coal seam mining in valley terrain

Zhang

Qian²,

Wang³

et al. 2023

Front. Earth Sci.

View full text Add to dashboard Cite

show abstract

“…The reason is that in the in situ environment, there are many uncertainties. The previous research indicates that these uncertainties can lead to the complexity of mining engineering cases and difficulty in solving the mining engineering issues [26,27]. Because of these uncertainties, when this study is applied to an engineering case, the findings may be adjusted to fit new cases.…”

Section: Discussionmentioning

confidence: 99%

Investigating the Influence of Embedment Length on the Anchorage Force of Rock Bolts with Modified Pile Elements

et al. 2022

View full text Add to dashboard Cite

The embedment length (EL) of full-grouting rock bolts is a core factor in rock bolt reinforcement. Therefore, understanding the influence of EL on the reinforcement performance of rock bolts benefits the rock reinforcement quality. To realise this purpose, this paper adopted the numerical modelling method. In this numerical modelling method, the structural elements of modified piles were used. The elastic debonding law was incorporated into the modified pile elements to model the debonding behaviour of the surface between rock bolts and grout. The results showed that the sliding of modified pile elements had a marginal influence on the reinforcement performance of rock bolts. Moreover, the EL has a paramount influence on the reinforcement performance of rock bolts. Before the rock bolts reached the largest anchorage force, there was a linear relation between the largest anchorage force and the EL. It was effective to use the linear regression analysis method to predict the critical EL of rock bolts. This finding was also applicable to fibre-reinforced polymer (FRP) rock bolts. Additionally, the rock bolt type had a paramount influence on the reinforcement performance of rock bolts. Before the rock bolts reached the largest anchorage force, metal rock bolts showed much larger initial stiffness than FRP rock bolts.

show abstract

“…Grouting is a widely used, effective tool that can reinforce and modify soil-rock mixtures with ease of construction, swift results, and minimal environmental impact [4]. Xia [5], Yang [6], and Hong Zou and other researchers [7] investigated the influence of sand-layer particle size, the grout water-cement ratio, grouting pressure, and other factors on injectivity.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Injectability of Infiltration Grouting in Surface Moraine of Pulang Copper Mine

Liu,

Sun,

Feng

et al. 2024

Water

View full text Add to dashboard Cite

In order to effectively reduce the risk of underground debris flow, surface moraine is solidified and modified by using grouting technology to realize the change in fine-grained moraine from “powder” to “block” to change the source conditions of underground debris flow and to reduce the risk of moraine from the root. In this paper, the effects of grouting pressure, porosity, and pore diameter on the spillability of moraine are investigated experimentally. The results show that the grouting depth increases linearly with increasing sample porosity. For the same sample density, the grouting pressure is proportional to the grouting depth. As the pore diameter of the sample increases, the longitudinal grouting depth of the sample increases, but the transverse diffusion distance decreases. The chemical grout in the moraine is mainly split-infiltration grouting mode. The present research results can provide effective support for the prevention and control of underground debris flow in Pulang Copper Mine.

show abstract

A Constitutive Model to Reveal the Anchorage Mechanism of Fully Bonded Bolts

Cited by 41 publications

References 42 publications

Study on prevention and control mechanism of runoff water hazard in thick coal seam mining in valley terrain

Study on prevention and control mechanism of runoff water hazard in thick coal seam mining in valley terrain

Investigating the Influence of Embedment Length on the Anchorage Force of Rock Bolts with Modified Pile Elements

Experimental Study of the Injectability of Infiltration Grouting in Surface Moraine of Pulang Copper Mine

Contact Info

Product

Resources

About