Tailing dry type recovery method of valley type tailing pond based on underground water drainage

Abstract

The invention discloses a tailing dry type recovery method of a valley type tailing pond based on underground water drainage. The method specifically comprises the following steps that recovering thewhole tailing pond is completed through investigation and geological survey of the tailing pond, division of a recovery area and determination of parameters, laying of a transportation road, adoptinga reverse excavation mode and setting of a drainage open ditch. According to the method, the drainage open ditch is excavated for drainage, the ditch is excavated by a wetland excavator, a drainage platform is ahead of a recovery platform by two layers, the drainage safety and the timeliness can be guaranteed, the engineering quantity can be directly used as the extraction quantity, the drainage and the recovery work are closely connected, the investment facility equipment is simple, the road in the tailing pond is directly paved with tailings, the time is saved, the convenience is realized, and the entry and the secondary dumping of different materials are avoided; and therefore, the recovery speed of the tailing pond is accelerated, the mining period is shortened, and the problem that the effective working time of traditional dry type recovery is short is solved. The lifting speed of the bearing capacity of the tailing pond foundation is accelerated, so that the tailing recovery workof the tailing pond is completed quickly and efficiently on a large scale.

Description

technical field [0001] The invention belongs to the technical field of tailings mining, and in particular relates to a tailings dry mining method based on groundwater drainage in a valley-shaped tailings pond. Background technique [0002] With the rapid development of economy and technology in our country, the development of mineral resources has increased, accompanied by the production of a large number of tailings ponds, which contain considerable resources, and the construction and maintenance of tailings dams are very expensive, which has brought environmental problems to the development of the mining industry. , Safety and economic impacts and problems, mining tailings is of great significance to make full use of non-renewable resources. [0003] At present, in the tailings mining of tailings ponds in my country, there are mainly three methods of tailings mining: water mining, ship mining and dry mining. [0004] Water mining is pressurized by means of a water pump, a...

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Problems solved by technology

[0005] Vessel mining uses dredgers or sand dredgers to mine in accordance with the specified mining zone. Before mining, the mining sequence, width of the mining zone and excavation depth must be preset. When using ship mining, a certain water level must be maintained in the tailings pond. The mining thickness is generally about 1.0m, which is characterized by large production capacity, high labor production efficiency, centralized production and easy management; the disadvantage is that the use conditions are relatively strict, and it is greatly affected by the terrain, lithology and temperature of the reservoir area

[0006] Dry mining is mechanical mining. Excavation equipment such as bulldozers and excavators is used to excavate the tailings, and then the tailings are directly loaded into the transportation tool through the loading equipment. It is characterized by simple and flexible production process, relatively easy management, and relative applicability However, due to the impact of foundation bearing capacity requirements, dry mining often needs to wait until the consolidation strength of the tailings beach meets the minimum requirements for mechanical equipment to enter the site before mining; for example, "Tailings The article "Safe Mining Engineering Practice" focuses on the tailings mining scheme. This mining scheme adopts the open-pit mining method of "excavator mining + belt transportation + vehicle transportation". Firstly, drainage is carried out in the tailings pond to consolidate the tailings. , so that the equipment is mined and transported in the state of tailings dehydration, directly loaded and transported, or reloaded, and then loaded and transported to the temporary storage yard, which only solves the problem of waterproofing and drainage for atmospheric precipitation, ignoring the discharge of tailings The tailings dry mining problem caused by the groundwater in the catchment area and the dry beach area formed by the collection of tailings water

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