Sand pump bed development
Posted by Wangkiky Wangkiky over 6 months ago
In the foundation pit, the foundation pit is excavated for about 40 ~ 50m and 10m wide. Depending on the thickness of the ore body, the foundation pit can be excavated to the floor of the deposit at one time or in segments, and the depth of the pulp pool in the pit is generally about 1.5m.
The trench trench method is used to dig trenches, and ore trench channels are set up in the trench to transport the placer by gravity. If it crosses the concave ground, it can cooperate with the self flowing inverted siphon, without power, and is economic and reliable.
Adit hole development method is used to dig adit and chute to ore body. A slip pipe is installed in the shaft, and the adit is flush with a mining ditch. This method is applicable to low-pit dispersed ore blocks in Karst hillside areas. In order to save power, self-flow transportation should be adopted as far as possible to avoid sand pump lifting. The length of adit used at present is 2.6Km. The chute is divided into two types: vertical and inclined. The well is supported by dense pillars. The diameter of the slip pipe is usually 350mm, and the slurry is sent through the pipe to the trench in the adit. There are two ways to arrange the gully: one is to build on the floor of the adit, which is suitable for mines with short service life; the other is to excavate under the floor of the adit. Buffer tanks are installed at the connection between the pipeline and the flushing ditch to reduce the impact force and prevent the slurry from splashing when it flows out of the pipe. A sieve should be provided at the upper entrance of the pipeline to prevent blockage of pipes by large lumps and mud masses.
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