摘要
With the continuous growth of the population and the continuous reduction of cultivated land,China’s food security is greatly threatened.In addition,China’s coal mining has been mainly underground mining,causing land subsidence and damaging existing cultivated land.This efect intensifes the contradiction between the growth of the risk population and the reduction of cultivated land.The reclamation of mining subsidence land with Yellow River sediment is often used as an efective way to improve the recovery rate of cultivated land.Shortening the reclamation time and realizing continuous flling are signifcant issues.The work presented in this paper studied the sediment settlement rate and consolidation time by combining theory,feld flling and reclamation tests and numerical simulations.A feld flling test study was carried out in the lowlands of Jibeiwang Village,Qihe County,Shandong Province,China.By calculating the drainage consolidation time,the consolidation factor of 0.015656 m^(2)/d,and the time factor for sediment consolidation of 0.575 were determined.The sediment consolidation time for this test was 9.18 days.The calculation of sediment deposition rate and consolidation time is of great practical signifcance to guide the Yellow River sediment flling,realize continuous flling,and save reclamation time and cost.
基金
This research was funded by Jiangxi Provincial Social Science Foundation“the 14th Five-Year Plan”(2021)regional projects(21DQ44)
National Natural Science Foundation of China(41771542)
Institutional Research Centers of Jiangxi Provincial of Ecological Civilization Construction(JXST2103)
Research Center of Geological Resource Economics and Management(20GL02)
Science and Technology Research Project of Jiangxi Provincial Department of Education(GJJ210723)
the Doctoral Research Initiation fund of East China University of Technology(DHBK2019184).
