US 11,911,813 B2
Ecological reconstructed sponge structure of strip mine dump and application of the same
Yinli Bi, Beijing (CN); and Suping Peng, Beijing (CN)
Assigned to CHINA UNIVERSITY OF MINING AND TECHNOLOGY (BEIJING), Beijing (CN)
Filed by China University of Mining and Technology (Beijing), Beijing (CN)
Filed on Jan. 27, 2022, as Appl. No. 17/585,923.
Claims priority of application No. 202110178118.3 (CN), filed on Feb. 9, 2021.
Prior Publication US 2022/0251954 A1, Aug. 11, 2022
Int. Cl. B09B 1/00 (2006.01); E21C 41/32 (2006.01)
CPC B09B 1/004 (2013.01) [E21C 41/32 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An ecological reconstructed sponge structure of a strip mine dump, which is a three-layered sponge ecological structure arranged on a groundmass layer of the dump;
the three-layered sponge ecological structure comprises, from bottom to top,
a water-resisting layer,
a water-containing layer, and
a topsoil ecological layer;
wherein
a thickness of the water-resisting layer is 100-200 cm,
a thickness of the water-containing layer is 150-250 cm,
the water-containing layer comprises a mixture of sand, soil, and fly ash that has been subjected to a degree of compaction,
the degree of compaction is 800-900 kPa, and
a permeability coefficient of the water-containing layer is 10-20 m/d.
 
6. A method of land reclamation and vegetation reconstruction in the strip mine dump, comprising:
combining an ecological reconstructed sponge structure with a ground penetrating radar to monitor thicknesses and moisture content of soil layers;
wherein, the ecological reconstructed sponge structure of a strip mine dump is a three-layered sponge ecological structure arranged on a groundmass layer of the dump, and the three-layered sponge ecological structure comprises, from bottom to top, a water-resisting layer, a water-containing layer, and a topsoil ecological layer;
wherein
a thickness of the water-resisting layer is 100-200 cm,
a thickness of the water-containing layer is 150-250 cm,
the water-containing layer comprises a mixture of sand, soil, and fly ash that has been subjected to a degree of compaction,
the degree of compaction is 800-900 kPa, and
a permeability coefficient of the water-containing layer is 10-20 m/d.
 
11. A method of land reclamation and vegetation reconstruction in the strip mine dump, comprising:
constructing an ecological reconstructed sponge structure;
wherein, the ecological reconstructed sponge structure of a strip mine dump is a three-layered sponge ecological structure arranged on a groundmass layer of the dump, and the three-layered sponge ecological structure consisting of, from bottom to top,
a water-resisting layer having an initial thickness of 100-200 cm,
a water-containing layer having an initial thickness of 150-250 cm, having a permeability coefficient of 10-20 m/d, and consisting of a mixture of sand, soil, and fly ash that has been subjected to a degree of compaction of between 800 and 900 kPa,
and a topsoil ecological layer having an initial thickness; and
periodically using ground penetrating radar to evaluate the thickness and moisture content of the topsoil ecological layer and the water-containing layer.