Salt pan isolation dam and construction method thereof

Abstract

The invention discloses a construction method for a salt pan isolation dam. The method comprises the following steps that the ground surface of an area where the salt pan isolation dam is to be constructed is tamped, and brine is sprayed to form a ground surface layer; a first mixture is laid on the ground surface layer to a first set height to form a base layer; a second mixture is laid on the base layer to a second set height to form a surface hardening layer, and the ground surface layer, the base layer and the surface hardening layer form a main body; and magnesium chloride crystals are laid on the side slope of the main body from top to bottom, tamping is conducted after the brine is sprayed, a magnesium chloride layer is formed, and the salt pan isolation dam is obtained. According to the provided salt pan isolation dam, the base layer is laid through the first mixture formed by mixing saline soil and waste salt, so that local materials are used, and the transportation period isshortened; the surface hardening layer is laid through the second mixture of waste salt and magnesium chloride, so that enough strength can be provided, and the surface hardening layer is not prone toweathering or brine scouring; and the magnesium chloride layer is used for protecting the main body from being washed away by brine in the salt pan and preventing the isolation dam from being damagedand the salt pan brine turbidity from increasing.

Description

technical field [0001] The invention relates to the technical field of mining production, in particular to a saltfield isolation dam and a construction method thereof. Background technique [0002] Northwest my country has a vast territory, and there are vast salt lakes. Among them, the Chaerhan Salt Lake in the Qaidam Basin is dry all year round and has little rain and snow. The total area of ​​the salt lake reaches 5,856 square kilometers. It is the largest soluble potassium and magnesium salt lake in China. In the production of potassium chloride, in order to facilitate the exploitation of potassium resources in the salt lake, the salt lake is often separated into several small salt fields by isolation dams, and the isolation dams are also used as transportation roads for the salt field production system. [0003] Due to geographical constraints, the entire Chaerhan Salt Lake is surrounded by saline soil layers. Although it is easy to mine and excavate, the isolation dam ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a salt field isolation dam and its construction method to solve the problems in the prior art that the strength of the salt-soil dam construction is low and it is easy to fall off to affect the turbidity of brine, and the long transportation period of sand and gravel dam construction is easy to affect the construction progress.

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