Experimental Investigation on Chemical Grouting in a Permeated Fracture Replica with Different Roughness

Jin, Lichuang; Sui, Wanghua; Xiong, Jialu

doi:10.3390/app9132762

Cited by 23 publications

(15 citation statements)

References 17 publications

(23 reference statements)

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“…Different approaches have been used, including experimental investigations, theoretical models, and numerical simulations. Papers [1][2][3][4][5] are related to concrete material, from papers [6][7][8][9][10][11][12] to rocks. Other contributions investigate the fracture behavior of functionally graded materials [13], glass [14], laminate composites [15], refractories [16], and soft matter [17].…”

Section: Fracturementioning

confidence: 99%

Special Issue on Fatigue and Fracture of Non-Metallic Materials and Structures

Spagnoli

2020

Applied Sciences

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This Special Issue covers the broad topic of structural integrity of non-metallic materials, and it is concerned with the modelling, assessment and reliability of structural elements of any scale. In particular, the articles being contained in this issue concentrate on the mechanics of fracture and fatigue in relation to applications to a variety of non-metallic materials, including concrete and cementitious composites, rocks, glass, ceramics, bituminous mixtures, composites, polymers, rubber and soft matters, bones and biological materials, advanced and multifunctional materials.

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Section: Fracturementioning

confidence: 99%

Special Issue on Fatigue and Fracture of Non-Metallic Materials and Structures

Spagnoli

2020

Applied Sciences

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“…e optimization of the ratio of grouting filling materials can not only improve the filling quality but also reduce the filling cost and bring great economic benefits to the coal mine. However, there are few studies on the ratio of separation grouting filling materials in coal mines in China, and the design of the ratio of separation grouting filling materials is relatively random, lacking certain scientific basis [26]. Orthogonal experiment is a scientific method to study and deal with multiple factors, and it has the advantages of "uniform dispersion and homogeneous comparison" and can obtain better results with fewer test times [27].…”

Section: Optimization Test Of Separation Groutingmentioning

confidence: 99%

A Pocket Assay Grouting Technology for Rock Burst Control under Huge-Thick Conglomerate

Shi

Meng

et al. 2020

Shock and Vibration

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As the carrier of force and energy, large-scale breaking or bending of huge-thick conglomerate tends to induce impact ground pressure in stope and tunnel. The stratum movement under huge-thick conglomerate was studied in this paper, which is mainly based on the key stratum theory for ground control. Based on this theory, the huge-thick conglomerate can be regarded as the main key stratum, and stratum movement or the development of grassroots state under huge-thick conglomerate will affect the structure itself, which may induce rock burst in stope and tunnel. The grouting technology is proved to effectively limit the bending settlement of conglomerate, control stress concentration of conglomerate, and improve the structure of the source of rock burst, which is an effective method for the control of huge-thick conglomerate. In this paper, the optimization of grouting filling material ratio is studied by the orthogonal experiments and the results show that the optimization of material ratio is cement: fly ash: gangue 1 : 2.22 : 4.44, concentration 75%. Under such conditions, pumpability and intensity reach the best. Meanwhile, a new technology, called pocket assay grouting technology, is put forward in this paper. It can prevent slurry leakage, protect the environment, and improve the efficiency of slip casting. The application of this technology in Huafeng mine shows that it not only realizes the safe, efficient, and green of coal mine but also provides technical support to control occurrence of rock burst induced by the movement of the huge-thick conglomerate in deep mining.

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“…On the one hand, cracks in the coal seam can serve as slurry flow channels to reduce slurry diffusion resistance. On the other hand, because of the weakening effect of cracks on the strength of coal, the coal is more likely to split under grouting pressure, which is conducive to slurry diffusion (Gothall and Stille 2009;Jin et al 2019;Jiang et al 2018;Deng et al 2018;Xiao et al 2017). Therefore, cracks in the coal seam and their distribution characteristics have an important influence on the grouting effect.…”

Section: Introductionmentioning

confidence: 99%

Macro and micro grouting process and the influence mechanism of cracks in soft coal seam

Hao

Jia

Liu

et al. 2021

Int J Coal Sci Technol

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Grouting is an important method to reinforce soft coal roadway, and the presence of primary cracks in the coal body has an important influence on the grouting effect. With the discrete element simulation method, the grouting process of the soft coal seam was simulated. The mechanism of primary cracks on grouting was revealed, while the influence of fracture characteristics and grouting pressure on the grouting effect was analyzed. The results demonstrated that grouting in the soft coal seam involves the stages of seepage, rapid splitting, slow splitting, and stability. Due to the presence of primary cracks, the grouting diffusion radius increased significantly. Under the slurry pressure, the tensile stress concentration was formed at the crack tip, and the slurry split the coal once the splitting pressure was reached. In addition, the distribution characteristics of fractures are found to have a great influence on the grouting effect. It is observed that smaller fracture spacing is associated with a larger slurry diffusion radius and thus easier penetration of the primary crack tips. The fracture angle affects the direction of fracture propagation. The secondary fracture formed by splitting is a tensile fracture, which is more likely to extend along the direction parallel to the maximum principal stress. Overall, these simulation results have guiding significance for the setting of reasonable spacing of grouting holes in the practice of grouting engineering.

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Experimental Investigation on Chemical Grouting in a Permeated Fracture Replica with Different Roughness

Cited by 23 publications

References 17 publications

Special Issue on Fatigue and Fracture of Non-Metallic Materials and Structures

Special Issue on Fatigue and Fracture of Non-Metallic Materials and Structures

A Pocket Assay Grouting Technology for Rock Burst Control under Huge-Thick Conglomerate

Macro and micro grouting process and the influence mechanism of cracks in soft coal seam

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