Study on Crack Evolution Mechanism of Roadside Backfill Body in Gob-Side Entry Retaining Based on UDEC Trigon Model

Wu, Bowen; Wang, Xiangyu; Bai, Jianbiao; Wu, Weili; Zhu, Xiangxiang; Li, Guodong

doi:10.1007/s00603-019-01789-6

Cited by 45 publications

(23 citation statements)

References 15 publications

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“…[42][43][44] In addition, a high-strength concrete spray layer can seal the shallow surrounding rock to effectively limit the arbitrary expansion of the surrounding rock fracture zone, thereby maintaining the integrity of the surrounding rock. [45][46][47][48][49][50][51][52][53][54][55][56][57] It can be seen that the coupled actions of the high-strength pretensioned anchor bolts and anchor cables with surface protecting components such as the plate and steel mesh, along with the high-strength concrete spray layer, constitute the high-strength "anchorage-mesh-shotcrete" support system for the goaf roof, as shown in Figure 5…”

Section: Resultsmentioning

confidence: 99%

“…However, the combined support of the high‐strength pretensioned anchor bolts and anchor cables can place the surrounding rock in a compression state and effectively control the deformation and failure of the surrounding rock in deep and shallow anchorage zones 42‐44 . In addition, a high‐strength concrete spray layer can seal the shallow surrounding rock to effectively limit the arbitrary expansion of the surrounding rock fracture zone, thereby maintaining the integrity of the surrounding rock 45‐57 . It can be seen that the coupled actions of the high‐strength pretensioned anchor bolts and anchor cables with surface protecting components such as the plate and steel mesh, along with the high‐strength concrete spray layer, constitute the high‐strength “anchorage‐mesh‐shotcrete” support system for the goaf roof, as shown in Figure 5.…”

Section: Resultsmentioning

confidence: 99%

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Combined support technology for main roadway passing through goaf: A case study

Chen

Zhang

Xie

et al. 2020

Energy Science & Engineering

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Combined support technology for main roadway passing through goaf: A case study

Chen

Zhang

Xie

et al. 2020

Energy Science & Engineering

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“…However, limited research has been conducted on studying the energy dissipation in the failure process of the anchorage body via the numerical simulation method. Previous studies found that the fracture development was the internal reason leading to the instability of the anchorage body [28,29]. However, the pretension force was the primary external influencing parameter in affecting the stability of the anchorage body [12].…”

Section: Introductionmentioning

confidence: 99%

A Study of the Anchorage Body Fracture Evolution and the Energy Dissipation Rule: Comparison between Tensioned Rock Bolts and Torqued Rock Bolts

Wang

Bai

et al. 2021

Advances in Civil Engineering

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Rock bolt support is an effective technique for controlling surrounding rock of deep roadway. The stability of the anchorage body composed of rock bolts and surrounding rock mass is the core in keeping the stability of roadways. In this paper, the UDEC Trigon model was used in simulating uniaxial compressive test on the anchorage body under different pretension loads. The energy equilibrium criterion of the anchorage body under the uniaxial compressive state was proposed. Furthermore, the fracture evolution and the energy dissipation during the failure process of the anchorage body were analyzed. Results showed that before the peak strength, the external work was stored in the anchorage body in the form of the elastic strain energy (Ue). After the peak, energy dissipated through three ways, including the fracture developing friction (Wf), plastic deformation (Wp), and acoustic emission (Ur). Based on the simulation results, the high pretensioned rock bolts can eliminate the continuous tensile fractures in the anchorage body, decreasing the damaging extent of the anchorage body and the energy that was consumed by the following two main approaches: fracture developing friction (Wf) and plastic deformation (Wp). Moreover, the surplus of the elastic strain energy (Ue) and the strength of the anchorage body can be improved. The pretension load had a positive relationship with elastic strain energy and a negative relationship with the anchorage body damage degree. Based on the above research, the transport roadway of the working face 6208 in the Wangzhuang Coal Mine selected tensile rock bolts to establish the high-performance anchorage body. The monitoring data showed that this reinforcement method effectively managed the serious deformation issue of the roadway surrounding the rock masses.

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“…Many scholars and experts have studied road-in support, roadside backfill body (RBB) construction, backfill materials, and GER surrounding rock stability for GER. Therefore, it has been found that bolt and anchor cable support and rigid U steel support are commonly used as road-in support for GER [17][18][19][20][21][22][23]. Huang [17] developed the concrete-filled steel tubular support for a 1000 m-deep roadway.…”

Section: Introductionmentioning

confidence: 99%

Gob-Side Entry Retained with Soft Roof, Floor, and Seam in Thin Coal Seams: A Case Study

et al. 2020

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Gob-side entry retained technology is of great significance to develop coal mining industry sustainably, which can improve the coal recovery rate by mining without the coal pillar. However, scholars and researchers pay little attention to the gob-side entry retained with soft roof, floor, and seam in thin coal seams. In this study, the difficulties and key points of surrounding rock control for gob-side entry retained with soft roof, floor, and seam in thin coal seams were firstly proposed. Secondly, the mechanical model of the interaction between the roadside backfill body and the roof for gob-side entry retained with soft roof, floor, and seam in thin coal seams was established, and the relevant parameters were designed. Finally, the above results were verified by the engineering practice of gob-side entry retained technology and the monitoring of mine pressure on the 1103 working face of the Heilong Coal Mine. Moreover, the effect factors of surrounding rock stability for gob-side entry retained with soft roof, floor, and seam in thin coal seams were discussed using the discrete element method. The results could provide guidance for gob-side entry retained with soft roof, floor, and seam in thin coal seams under similar geological conditions.

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Study on Crack Evolution Mechanism of Roadside Backfill Body in Gob-Side Entry Retaining Based on UDEC Trigon Model

Cited by 45 publications

References 15 publications

Combined support technology for main roadway passing through goaf: A case study

Combined support technology for main roadway passing through goaf: A case study

A Study of the Anchorage Body Fracture Evolution and the Energy Dissipation Rule: Comparison between Tensioned Rock Bolts and Torqued Rock Bolts

Gob-Side Entry Retained with Soft Roof, Floor, and Seam in Thin Coal Seams: A Case Study

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