Model test study on overburden settlement law in coal seam backfill mining based on fiber Bragg grating technology

Piao, Chunde; Wang, Dong; Kang, Hui Z.; He, Hu; Zhao, Chaoqi; Liu, Wenyuan

doi:10.1007/s12517-019-4564-0

Cited by 22 publications

(5 citation statements)

References 11 publications

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“…Therefore, the goaf filling treatment is one of the effective means to ensure mining safety, control the movement deformation of rock mass, and avoid surface collapse [20]. However, most of the rock strata movement deformation and surface subsidence of mine filling and mining are studied by theoretical formulas, similar materials, and numerical simulation combined with traditional monitoring methods [7,[21][22][23]. However, the rock strata movement, deformation, and surface subsidence are affected by various factors, resulting in different degrees and locations of influence in each period.…”

Section: Introductionmentioning

confidence: 99%

Study on Rock Strata Movement Deformation and Surface Subsidence in Mining Area Based on PS-InSAR Technology

Huang¹,

Li²,

Li³

et al. 2023

Preprint

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The rock strata movement deformation generated by the mining process of the mine will inevitably lead to surface subsidence and a series of environmental hazards, so it is particularly important to monitor the rock strata movement deformation and surface subsidence in the goaf area. With the development of surface subsidence monitoring technology, InSAR technology has been widely used in the research of surface subsidence in mining areas with the advantages of high precision and wide monitoring. In this paper, by obtaining the image data of 59 Sentinel-1A scenes in the mining area, the obtained PS points were analyzed and processed by ArcGIS difference analysis by PS-InSAR technology, and the surface deformation cloud map and settlement curve of the mining area in various periods were obtained, and the rock strata movement deformation and surface subsidence law of the goaf before treatment and after different treatment methods were studied by influencing factors such as stope layout and mining depth. The results show that the rock strata movement deformation and surface subsidence degree of the goaf under different treatment methods are different due to different influencing factors, and their positions also change dynamically with time. Applying InSAR technology to study rock strata movement deformation and surface subsidence can provide an important basis for mine safety mining, goaf treatment, rock strata movement deformation and surface subsidence monitoring.

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Section: Introductionmentioning

confidence: 99%

Study on Rock Strata Movement Deformation and Surface Subsidence in Mining Area Based on PS-InSAR Technology

Huang¹,

Li²,

Li³

et al. 2023

Preprint

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“…e high-rate thickening of the tailing slurry is the key part of the full tailing filling technology [11,12]. e underflow concentration is a key technical parameter for the thickening performance of tailings [13,14]. It is found that the final underflow concentration greatly varies in the flocculation settlement tests of tailings from different mines.…”

Section: Introductionmentioning

confidence: 99%

Study on the Relation between Tailing Particle Size and Tailing Slurry Underflow Concentration

Zou¹,

Liu

2022

Advances in Civil Engineering

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In order to study the effect of the physical properties of tailings on the concentration of tailing slurry underflow, the median particle size, control particle size, and density of the tailings of 9 typical mines were measured. Besides, static settlement test and dynamic thickening test of the tailing slurry of these 9 mines were separately conducted. The test results show that the underflow concentration of the tailing slurry is unrelated to the tailing density but is related to the tailing particle size. The finer the tailing particle size, the lower the underflow concentration. Through the nondimensional regression analysis, 3 relation equations were obtained: number 1 relation equation between the median particle size of tailings and the underflow concentration in the static settlement test, number 2 relation equation between the control particle size of tailings and the change in concentration in the static settlement test, number 3 relation equation between the underflow concentration in the static settlement test and the underflow concentration in the dynamic thickening test under different overflow water solid content conditions. Comparing the calculation results with the test results, it is found that the relative error between the predicted value and the test value does not exceed 6.1%, which has proved that the relation equations derived are convenient and feasible. The underflow concentration of the deep cone thickener can be predicted by merely measuring the particle size of the tailings, which means that the relation equations are highly recommended for wider use and application.

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“…e slope stability of open-pit mine has extremely important influence on mining and surrounding environment [12][13][14][15][16][17][18]. e study on slope stability of open-pit mine mainly includes the stability of working side slope and dump slope [19,20]. At present, many research studies have been carried out on slope stability of open-pit mine [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Deformation Law of Inner Waste Dump Slope in an Open‐Pit Coal Mine: A Case Study in Southeast Inner Mongolia of China

Cao

Wang

Song

et al. 2021

Advances in Civil Engineering

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The settlement and deformation of an open-pit mine waste dump were investigated by using field monitoring and numerical methods. The creep parameters of fine soil sand in the dump fill were inverted using the steady Burgers creep model, and FLAC3D software was used to simulate the dumping soil construction and development program. The results show that the settlement displacement of the dump increases with the time of dumping soil and tends to be stable after 4 years. In the creep attenuation stage of the creep process, there is a big difference between the numerical calculation and the field monitoring results in the inversion process of fine-grained soil sand parameters. In the steady-state creep stage, the numerical calculation is consistent with the field monitoring value. The height of the fill has an influence on the settlement of the fill body of the dump and the time to reach the stability. The higher the filling height is, the greater the postconstruction settlement will be, and the longer it will take to reach stability. The pushing position of the fill body has a great influence on the settlement displacement of the dump. The time and efficiency of soil discharge can be shortened by optimizing the safe distance between the filling body and the river. Based on the numerical calculation results and the empirical settlement function, an analytical method for river channel location selection of internal dump is proposed.

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Model test study on overburden settlement law in coal seam backfill mining based on fiber Bragg grating technology

Cited by 22 publications

References 11 publications

Study on Rock Strata Movement Deformation and Surface Subsidence in Mining Area Based on PS-InSAR Technology

Study on Rock Strata Movement Deformation and Surface Subsidence in Mining Area Based on PS-InSAR Technology

Study on the Relation between Tailing Particle Size and Tailing Slurry Underflow Concentration

Investigation on the Deformation Law of Inner Waste Dump Slope in an Open‐Pit Coal Mine: A Case Study in Southeast Inner Mongolia of China

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