Pit bottom reservoir stage construction method based on internal drainage strip mine middle bridge

Abstract

The invention discloses a pit bottom reservoir stage construction method based on an internal drainage strip mine middle bridge. First-stage reservoirs are constructed through the following steps of S1, refuse dump construction; S2, base construction; S3, pumping equipment arrangement; S4, bridge body construction; S5, cutoff wall supplementary building; S6, in-site bridge building; S7, reservoirbed abandonment; S8, capping; S9, drainage equipment arrangement; and S10, reservoir sealing. Later-stage reservoirs are constructed through the steps that after the first-stage reservoirs are built,a reservoir sealing cutoff wall is used as a refuse dump cutoff wall of a next stage, multiple stages of reservoirs are built step by step in the propelling direction of a strip mine, and a continuousreservoir group is formed. According to water resource storage, water resources are injected into the pit bottom reservoirs through drainage pipelines. The method has the beneficial effects that strip mine stope middle bridging and building of the pit bottom reservoirs are combined, strip mine pit bottom space resources are fully utilized, and the construction cost of the pit bottom reservoirs islow.

Description

technical field [0001] The invention specifically relates to a phased construction method of a pit bottom reservoir based on an intermediate bridge in an inner row open-pit mine, and belongs to the field of mining and mining area environmental control. Background technique [0002] Open-pit mining is a process of removing the covering on the ore body and extracting useful minerals from the open-surface mining field. Internal drainage open-pit mining refers to the process of directly discharging the stripped materials to the goaf during the open-pit mining process. An operation method in which an internal dump is formed in the area, and the internal dump and the coal mining steps of the open-pit mine are advanced synchronously. For open-pit mines with near-horizontal occurrence, in order to shorten the internal transportation distance of the stripped material, it is often transported through an intermediate bridge that connects the stope and the internal dump. The middle bri...

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Problems solved by technology

[0004] In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a phased construction method for pit bottom reservoirs based on the intermediate bridge in the open-pit mine in the north, so as to solve the problem of large water resource storage requirements, high difficulty, and waste of intermediate bridge space in the northern open-pit mining area. problems, and at the same time improve the storage capacity of water resources and realize the space utilization of the intermediate bridge

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