Patent ID: 9581023
Date: 2017-02-28
CPC Classifications: B65G,C02F,E04H,E21F

Claim:
1. An underground water reservoir of opencast coal mine, characterized in that it comprises an impermeable layer and, provided below the impermeable layer, a water storage space and a purification layer, wherein the water storage space comprises a first water storage space and a second water storage space; the purification layer comprises a first purification layer and a second purification layer, the first purification layer is horizontally provided in the water storage space and divides the water storage space into the first water storage space and the second water storage space, the first water storage space is provided below the impermeable layer and between the impermeable layer and the first purification layer, the second water storage space is provided below the first water storage space and bottom part of the second water storage space is positioned at the bottom of the opencast coal mine underground water reservoir, and the second purification layer is vertically provided within the second water storage space, and the second water storage space is vertically provided with a plurality of the second purification layers, the first purification layer has a filtering thickness which is a physical thickness in vertical direction of the first purification layer, and the second purification layer has a filtering thickness which is a physical thickness in horizontal direction of the second purification layer.