Calculation model of overburden subsidence in mined-out area based on Brillouin optical time-domain reflectometer technology

Meng, Fanfei; Piao, Chunde; Shi, Bin; Sasaoka, Takashi; Shimada, Hideki

doi:10.1016/j.ijrmms.2021.104620

Cited by 19 publications

(6 citation statements)

References 39 publications

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“…Land subsidence's spatial extent and value are primarily determined by the depth of exploitation, seam thickness, panel dimensions, overlying rock mass geomechanical conditions, geological defects, surface topography, production methods and post-mining void reclamation method [30,52,53]. Many research papers have been presented in recent years documenting the land subsidence phenomenon caused by mining [47,49,[54][55][56][57][58][59][60][61][62][63]. As a result, one can be stated that the spatial extent of the phenomenon can range from several km 2 [49] to tens of km 2 [15], while its values can range from a few mm/year [64] to several cm/day [65].…”

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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“…DOFS has been subjected to rapid development in the past decades. This well-developed rock deformation monitoring technique has already been employed in various different applications, including infrastructural health monitoring, deformation and damage level assessment of overlying rocks, borehole pressure relief evaluation, tunnel deformation measurement, slope stability assessment, and ground subsidence monitoring 27,28 . As the mining operation proceeds forward in the working face, the overlying strata will start to deform, which causes the optical cable sensor (containing the optical fiber) to stretch along the axial direction in the borehole.…”

Section: Monitoring Methods and Instrumentsmentioning

confidence: 99%

The field monitoring experiment of the high-level key stratum movement in coal mining based on collaborative DOFS and MPBX

Wang

Xie

Zhu

et al. 2022

Sci Rep

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The deformation and movement characteristics of high-level key stratums in overlying strata are important for estimating ground subsidence and understanding failure characteristics of ultrathick strata during mining. In this study, a distributed optical fiber sensor (DOFS) and multipoint borehole extensometers (MPBXs) were collaboratively employed to monitor the deformation of high-level key stratums in situ during the mining process at working face 130,604 of the Maiduoshan Coal Mine. DOFS monitoring results showed that the distance from advance influence of mining on the ground surface is 219.2 m. The deformation of the shallow stratums were greater and was affected earlier than that of the deep stratums. The deformation in the strata did not occur continuously and the boundary curve of the impact from advance mining was not a straight line with the advancement of the working face. By the MPBX technology, we measured the strata movement and obtained four-stage characteristics of high-level key stratum movement. The subsidence of the primary key stratum and the sub key stratum were monitored to reach 1389 and 1437 mm; their final relative displacement differed by 48 mm. No bed separation was observed in between the strata, and the key stratums tended to sink as a whole with the advancement of the working face. This research guides the analysis the movement of thick high-level key stratums.

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“…In China, the probability integration model created by Liu and Liao is the most frequently applied prediction method in mining-induced subsidence (Liu and Liao, 1965;Liu and Dai, 2016;Hu et al, 2022). The empirical method mostly combines actual monitoring data with suitable mathematical functions, such as varied profile function methods and typical curve methods (Diez and Alvarez, 2000;Xu and Li, 2005;Chen et al, 2016;Meng et al, 2021). Numerical models also played an important role in studying ground subsidence induced by mining (Xie et al, 1999;Sheorey et al, 2000;Park et al, 2005;Svartsjaern et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

A preliminary analysis of the mining-induced rock movement characteristics in the Xinli deposit of the Sanshandao gold mine

Liu

Ma²,

Guo³

et al. 2023

Front. Earth Sci.

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Commensurate with economic globalization, the demand for mineral resources is increasing. With increased mining activity, problems related to ground subsidence and rock movement are becoming increasingly prominent, even affecting mining production activities. However, the physical mechanisms behind the ground subsidence phenomenon have been poorly studied, especially for metal mines with a steep dip. This paper applies the Interferometric Synthetic Aperture Radar (InSAR) technique and the numerical simulation method to deduce the characteristics of rock movement in the Xinli deposit of the steeply inclined Sanshandao gold mine. The InSAR results indicate that more subsidence has occurred in the southern part of the Xinli Village coastline area than in the northern part. This is also supported by the numerical simulation results obtained by the fast Lagrangian analysis of continua in three dimensions (FLAC3D). Notably, the range of ground subsidence obtained by numerical simulation shows an obvious asymmetry. The monitoring data of the No. 55 prospecting profile offer a plausible explanation for this, as the surrounding rock of the fault’s hanging wall has a wider range of rock movements. Furthermore, the sublevels of the No. 55 prospecting profile at different depths show different rock movement characteristics, and a logistic function can be well applied to the right part of the settlement curve; the parameter “a” in the function formula is very close to the maximum subsidence value for each sublevel. We defined the ratio “r” to measure the difference between the maximum subsidence value and the corresponding parameter “a” and found this value to be positively correlated with the fractal dimension value of deeper sublevels (−320 m, −400 m, −480 m, and −600 m) and negatively correlated with the fractal dimension value of lower sublevels (−200 m and −240 m).

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Calculation model of overburden subsidence in mined-out area based on Brillouin optical time-domain reflectometer technology

Cited by 19 publications

References 39 publications

Land Subsidence Estimation for Aquifer Drainage Induced by Underground Mining

Land Subsidence Estimation for Aquifer Drainage Induced by Underground Mining

The field monitoring experiment of the high-level key stratum movement in coal mining based on collaborative DOFS and MPBX

A preliminary analysis of the mining-induced rock movement characteristics in the Xinli deposit of the Sanshandao gold mine

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