Open-pit coal mine underground reservoir including core rockfill dam structure

Abstract

The invention provides an open-pit coal mine underground reservoir including a core rockfill dam structure. The open-pit coal mine underground reservoir comprises an open-pit coal mine pit used as a water storage space, core dams disposed in the open-pit coal mine pit, rockfill arranged in front of and behind the core dams and used as a water storage body, and soil on the rockfill pumped by an internal dumping operation, wherein the core dams include a plurality of core dams which are successively constructed according to the direction of the internal dumping operation; the plurality of core dams divide the open-pit coal mine pit into a plurality of underground water storage spaces; each of the core dams is constructed in multiple phases based on the internal dumping operation; a water pipe network is arranged between the plurality of underground water storage spaces to ensure water transfer and water intake between different reservoirs; and the bottom of the rockfill is provided withan anti-seepage layer made of a solid waste. The open-pit coal mine underground reservoir including the core rockfill dam structure combines the internal dumping operation in the open-pit coal mine with the groundwater reservoir construction, and achieves the safe and efficient construction of the open-pit coal mine underground reservoir.

Description

technical field [0001] The invention belongs to the cross-technical field of mining engineering and water conservancy engineering, and in particular relates to an open-pit coal mine underground reservoir comprising a core wall rockfill retaining dam structure. Background technique [0002] The large-scale coal power bases in the eastern grasslands are ecologically fragile, and open-pit coal mining can easily cause land desertification, and at the same time cause pollution and damage to the groundwater operating system. Therefore, the construction of underground reservoirs in open-pit coal mines plays an important role in water resource protection for the ecological restoration of large-scale coal power bases in the eastern grasslands. [0003] Open-pit coal mining needs to strip the surface rock and soil layer to extract the coal body, and then backfill the mined-out area with the surface rock-soil layer stripped. This mined-out area is called the internal dump, and the inte...

AI Technical Summary

Problems solved by technology

[0002] Large-scale coal power bases in the eastern grasslands are ecologically fragile, and open-pit coal mining can easily cause land desertification, and at the same time cause pollution and damage to the groundwater operating system

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