Experimental investigation on dynamic deformation characteristics of the overlying strata in backfilling strip mining at different time scales.

Autor: Zha F; Anhui Province Engineering Laboratory for Mine Ecological Remediation, Anhui University, Hefei, 230601, China., Zhu X; Anhui Province Engineering Laboratory for Mine Ecological Remediation, Anhui University, Hefei, 230601, China. zhuxiaojunahu@126.com.; School of Environment Science and Spatial Information, China University of Mining and Technology, Xuzhou, 221008, China. zhuxiaojunahu@126.com., Guo G; School of Environment Science and Spatial Information, China University of Mining and Technology, Xuzhou, 221008, China., Liu H; Anhui Province Engineering Laboratory for Mine Ecological Remediation, Anhui University, Hefei, 230601, China., Zhang P; Anhui Province Engineering Laboratory for Mine Ecological Remediation, Anhui University, Hefei, 230601, China., Yang X; Department of Engineering Management, Hefei College of Finance and Economics, Hefei, 230601, China.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2024 May; Vol. 31 (25), pp. 37283-37297. Date of Electronic Publication: 2024 May 21.
DOI: 10.1007/s11356-024-33715-x
Abstrakt: The dynamic subsidence disaster caused by underground mining of coal resources is a complex spatiotemporal process, which is a common disaster in mining areas. The backfilling strip mining technology is a green and sustainable coal mining method, which has been commonly used to reduce the subsidence disaster of the overlying strata and protect surface buildings. The transient deformation is the main reason of surface buildings damage; therefore, in this study, the similar material model was used to research dynamic deformation characteristics of the overlying strata in backfilling strip mining at different time scales, and the optical image method was employed to monitor and obtain the movement data of the overlying strata automatically. The data analysis shows that there is a time-scale effect in mining subsidence. The deformation of the overlying strata increases instantaneously at a certain time under the monitoring of small time scale, and this phenomenon gradually disappears as time scales increase. According to the subsidence velocity of small time scale, the subsidence state of the overlying strata can be further divided into the abrupt subsidence state and the gentle subsidence state. This is really significant for promoting the development of the backfilling strip mining technology and preventing the damage of surface buildings.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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