Stability Evaluation of Old Goaf Treated with Grouting Under Building Load

Wang, Changxiang; Lu, Yao; Cui, Boqiang; Guo, Heng; Zhang, Xin

doi:10.1007/s10706-018-0482-2

Cited by 19 publications

(9 citation statements)

References 9 publications

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“…When the new building is located on the surface above the old goaf, under the effect of the building load, it will produce additional stress to the foundation soil and transfer it down according to certain rules, changing the stress state of the fractured rock above the old goaf, making the overlying rock of the goaf produce new deformation and failure [38]. e stability of the ground surface will be strengthened if the strip mining or backfill mining method is adopted by the work plane [39][40][41].…”

Section: Long-term Stability Of New Buildings Above Old Goafmentioning

confidence: 99%

Surface and New Building Deformation Analysis of Deep Well Strip Mining

Luan

Dong

et al. 2020

Advances in Materials Science and Engineering

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Aiming at the problem of surface movement and long-term stability of a work plane of deep well strip mining in Shandong Province, an observation station is set up on the surface of strip mining, and the surface deformation value during strip mining is measured with advanced measuring instruments; on the stable surface of the old mining area, the surface deformation monitoring work is also carried out for new buildings. In addition, the FLAC3D simulation method is used to determine the subsidence factor of different mining depth, mining width, mining length, and mining thickness, and the mathematical model between the subsidence factor and mining depth, mining width, mining length, and mining thickness is established. After the surface of the old goaf is basically stable after strip mining, the high-rise buildings are built. By changing the size of the new buildings and the amount of the load imposed on the surface, the surface deformation is simulated and calculated, and the relationship between the different load positions, load sizes, loading building sizes, and the surface activated deformation is obtained. The measured value of the surface deformation confirms that the load of the new buildings can induce the activation of the old goaf and make the surface generate secondary deformation, but the activated deformation makes the new building within the range of 1, so the new building is safe.

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Section: Long-term Stability Of New Buildings Above Old Goafmentioning

confidence: 99%

Surface and New Building Deformation Analysis of Deep Well Strip Mining

Luan

Dong

et al. 2020

Advances in Materials Science and Engineering

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“…Once the slurry is hardened, it increases the strength of the reinforced soil or reduces its permeability and improves the physical and mechanical properties of the reinforced soil. e grouting method is extensively used in the treatment of goafs, and it has a unique effect on the protection of surface buildings and the ecological protection of mining areas [15]. erefore, the grouting method is used to reinforce the existing goaf of Zhongxing no.…”

Section: Research On Integrated Treatmentmentioning

confidence: 99%

Integrated Treatment Technology of Storage‐Mining Inclined Goaf under Expressway

Wei-xing

Wang

et al. 2020

Advances in Civil Engineering

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An inclined goaf caused by storage mining is a serious risk to subgrades and pavements. In this paper, effective investigation and detection methods of goafs were discussed considering the project of the Urumqi East Ring Expressway crossing the existing goaf of Zhongxing no. 2 mine. Moreover, by theoretical analysis and a series of field comparative tests, reasonable grouting parameters and the treatment plan were obtained. By comparing the test results of the field and laboratory, the influence of groundwater on the effect of grouting was revealed to reduce the compressive strength of the consolidating objects of the slurry. The high-density resistivity method presented strong anti-interference ability and high accuracy in a depth range of less than 150 m in the investigation of the goaf. The results of the treatment showed that it is necessary to conduct research and analysis from multiple aspects to obtain the best treatment plan of a goaf and ensure the safety of a project.

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“…China's topography is complex, and the area of the goaf accounts for about 26% of the national mine area (Wang et al, 2019a). The over-exploitation of mineral resources has led to frequent occurrence of geological disasters such as landslides, and there is a trend of aggravation year by year, posing a great threat to people's lives and property safety (Wang et al, 2018). Therefore, the application of modern spatial geodesy means to achieve effective monitoring of surface deformation (Zhou N. et al, 2021), analysis of the stability of the interior of the goaf to establish a geological disaster monitoring and early warning system, can prevent the occurrence of geological disasters at the same time a good ecological restoration, reduce people's disaster losses (Zhang and Wang, 2021).…”

Section: Introductionmentioning

confidence: 99%

Research on monitoring and stability evaluation of ground subsidence in gypsum mine goaf

Wang

Zhu

et al. 2023

Front. Environ. Sci.

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The geological disasters caused by the ground deformation of the goaf have brought huge security risks to the ecological environment and society. Therefore, it is imminent to realize the effective monitoring and stability analysis of the ground deformation of the goaf. In this paper, taking the goaf of the gypsum mine in Diaodao District, Jingmen City as an example, through the investigation of the overall structure and distribution characteristics of the gypsum goaf, combined with the mechanical parameters of the rock mass selected from the site, the InSAR and GNSS technology are used to analyze the ground of the goaf of the gypsum mine. Deformation monitoring is carried out to give full play to the advantages of InSAR monitoring with high vertical accuracy and GNSS monitoring with high horizontal accuracy. Analyzed the thickness conditions of the mined-out area of pillar, roof and overlying rock, established the numerical model of the goaf, and used FLAC (3D) to carry out numerical simulation on this basis to evaluate the stability of the goaf. The research shows that two subsidence areas and three deformation areas were deciphered by DInSAR and time series InSAR, respectively, and the deep buried areas in the goaf were monitored by GNSS. The surface deformation is dominated by horizontal displacement, and the direction of horizontal displacement is the whole points to the goaf. Finally, based on the conclusion that the gob is in different degrees of deformation, the stability of the gob is analyzed, and the area of surface subsidence is obtained by FLAC (3D) simulation.

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Stability Evaluation of Old Goaf Treated with Grouting Under Building Load

Cited by 19 publications

References 9 publications

Surface and New Building Deformation Analysis of Deep Well Strip Mining

Surface and New Building Deformation Analysis of Deep Well Strip Mining

Integrated Treatment Technology of Storage‐Mining Inclined Goaf under Expressway

Research on monitoring and stability evaluation of ground subsidence in gypsum mine goaf

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