Field Measurement and Numerical Modelling Study on Mining‐Induced Subsidence in a Typical Underground Mining Area of Northwestern China

Zhang, Kai; Bai, Lu; Wang, Pengfei; Zhu, Zhuang

doi:10.1155/2021/5599925

Cited by 5 publications

(5 citation statements)

References 22 publications

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“…Therefore, the monitoring of ground surface displacements is used to model the land subsidence associated with rock mass drainage. Many geomechanical [104][105][106][107][108][109], stochastic [110][111][112][113][114][115][116][117][118], GIS-based analysis [119][120][121][122][123][124][125][126][127][128][129] and, more recently, AI (Artificial Intelligence)based models [130][131][132][133] can accurately predict mining-induced ground movements. The influence function method is, however, most widely used [112].…”

Section: Introductionmentioning

confidence: 99%

Land Subsidence Estimation for Aquifer Drainage Induced by Underground Mining

Guzy

Witkowski

2021

Energies

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Land subsidence caused by groundwater withdrawal induced by mining is a relatively unknown phenomenon. This is primarily due to the small scale of such movements compared to the land subsidence caused by deposit extraction. Nonetheless, the environmental impact of drainage-related land subsidence remains underestimated. The research was carried out in the “Bogdanka” coal mine in Poland. First, the historical impact of mining on land subsidence and groundwater head changes was investigated. The outcomes of these studies were used to construct the influence method model. With field data, our model was successfully calibrated and validated. Finally, it was used for land subsidence estimation for 2030. As per the findings, the field of mining exploitation has the greatest land subsidence. In 2014, the maximum value of the phenomenon was 0.313 cm. However, this value will reach 0.364 m by 2030. The spatial extent of land subsidence caused by mining-induced drainage extends up to 20 km beyond the mining area’s boundaries. The presented model provided land subsidence patterns without the need for a complex numerical subsidence model. As a result, the method presented can be effectively used for land subsidence regulation plans considering the impact of mining on the aquifer system.

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Section: Introductionmentioning

confidence: 99%

Land Subsidence Estimation for Aquifer Drainage Induced by Underground Mining

Guzy

Witkowski

2021

Energies

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“…In the future, field monitoring is planned to confirm and verify the obtained results. Modern methods of the surface monitoring allow making large areas observation quickly [3,36]. This significantly save time and human resources for field measurement.…”

Section: Resultsmentioning

confidence: 99%

“…Zhang et al [3] presented a study of field measurement and numerical simulation on mininginduced subsidence in an area of Northwestern China. The panels with dimensions 241 m wide and over 3000 m long were extracted.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the surface subsidence evolution caused by the flooding of the longwall goaf during excavation of thin coal seams

Sakhno,

Petrenko

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Underground mining has a significant influence on ground movement, which induces serious environmental disturbances on land. Movements of the rock strata can be the cause of changes in the hydrogeological regimes of groundwater. As a result, the risk of flooding of the longwalls goaf increases. The specific phenomenon of the Ukrainian Donbas is the flooding of the underground roadway system at the result of the closure of the mines. Water saturation of rocks leads to a decrease in its strength. The result is repeated subsidence. The activation of the ground movement processes over the longwall goaf due to their flooding has not been studied enough. In this paper, for the geological conditions of thin coal seams typical for the Ukrainian Donbas, ground movement evolution caused by flooding of longwalls goaf was studied. Ansys code was used to analyze the evolution of surface displacement in different hydrogeological conditions. As a result of numerical simulation, it was found that full flooding of the longwall goaf leads to an increase in surface subsidence by 22.4%, while the length of the trough increase by 1.3%. Maximal inclination increases by 34.4%, and maximal curvature – by 74%. This contributes to a significant increase in hazards for surface infrastructure located on the edges of the subsidence trough. The control of the negative impact on surface infrastructure objects, water and agro-industrial objects can be ensured by a timely prediction of ground movement and the implementation of surface controlling methods to prevent critical surface deformations.

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“…The damage effect of casing and the effect of lithological parameters were analyzed (Whittles, Lowndes et al 2006). France utilized an experimental method to study the failure characteristics of the surrounding rock, pointing out that the principal stress on the well wall has an important effect on the well stability (Chi, Zhang et al 2019, Ju, Wang et al 2019, Zhang, Bai et al 2021. The quantitative relationship between the geological well failure characteristics and the geostress, initially obtaining the relationship among different geostress and deformations of the ground drills (Fu, Sun et al 2020, Luan, Dong et al 2020, Sun, Xu et al 2022.…”

Section: Introductionmentioning

confidence: 99%

Key technology and application of surface well drainage of coalbed methane in mining area of high gas mine

Fu,

Wen,

Zhang

et al. 2024

Preprint

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The coalbed methane drainage with surface well, under the mining effects in a high gas coal mine has become increasingly important, especially for a complex region for the coalbed methane drainage. In contrast, due to the effects of coal mining, the surface wells are prone to deformation and damage. In this paper, a displacement and deformation model for the overlying strata was established. Three forms of deformation and failure of the surface well casing were proposed, such as shearing, stretching and uneven extrusion. Moreover, the mathematical model functions of “S” - type shear deformation, delamination tensile deformation and non-uniform extrusion for the surface well were established. In the ShanXi Coal Group YueCheng Mine, on the mining affected area surface well the coalbed methane drainage practice was conducted, producing a good coalbed methane drainage effect. YCCD-04 well without local protective device was deformed and damaged, and the dynamic deformation and failure process of surface well was detected by well imager; YCCD-02 well with local protective device has experienced mining and gas drainage effect is good, which verifies the effectiveness of local protective device. The YCCD-02 well coalbed methane drainage was 35 months in duration and the cumulative extraction of coalbed methane drainage volume was 1.3×107 m3. Simultaneously, the problem of gas control in the working face was solved, to ensure the safety of coal mining, achieving good social and economic effects.

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Field Measurement and Numerical Modelling Study on Mining‐Induced Subsidence in a Typical Underground Mining Area of Northwestern China

Cited by 5 publications

References 22 publications

Land Subsidence Estimation for Aquifer Drainage Induced by Underground Mining

Land Subsidence Estimation for Aquifer Drainage Induced by Underground Mining

Numerical simulation of the surface subsidence evolution caused by the flooding of the longwall goaf during excavation of thin coal seams

Key technology and application of surface well drainage of coalbed methane in mining area of high gas mine

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