SU1532703A1 - Method of strip mining of salt deposits - Google Patents

Abstract

The invention relates to the mining industry and makes it possible to increase the efficiency of mining of salt deposits by reducing the leaching of the pit sides and the dump from precipitation while reducing the cost of mining. After drying the quarry floor with a drainage trench and water-reducing wells, the mineral deposit is treated in the project contour of the quarry in two sections. At the same time, during mining of overburden and mining ledges, working sites are given a bias towards the development of the mining front. After the formation of an open space within the pit contour along the working side, a ridge of waterproof rocks (GNP) is formed. Then, dumping of the internal salt dump with the ridge to the non-working board is performed with laying of the layer of GNP between the layers. As the overburden is filled with salt-bearing rocks, its surface is insulated by coating with a GNP layer. At the boundary of each river with the slope of the non-working pit bend side, a temporary sump is formed, where precipitates come along the GNP layer, and then are pumped to the storage tanks beyond the pit. 1 il.

Description

The invention relates to the mining industry and can be used with readily soluble minerals in a humid climate.

The purpose of the invention is to increase the efficiency of mining of salt; births by reducing leaching of the pit walls and dumping of precipitation while reducing field development costs.

The drawing shows a section of a pit, worked out according to the proposed method. The drawing shows: mineral 1, rocky overburden 2, lower ledge 3 of the ledge, (ridge 4 of waterproof rocks, non-working board 5, eng 6, layer 7

borehole trench

waterproof rocks, slope 8 of the non-working ledge, temporary sump 9, pump 10.

The method is carried out as follows.

After draining a career floor and water lowering

minerals work in the project contour of the pit in two sections.

The overburden from site I is transported to an external dump. After the completion of section I for a length sufficient to accommodate the volume of overburden, taking into account the coefficient of loosening from section II, the overburden from section II is placed in

20

the secret space of site I. When excavating mineral 1 and rock overburden 2, the working platforms of the ledges are biased towards the development of the mining front. To capture precipitation on ra-Chg mobile platforms at the lower edge 3, each upstream ledge forms temporary sump. Brines, stacks over work sites, accumulate in temporary sump, from where they are pumped into storage tanks located outside of the pit.

The dumping of overburden rocks into the internal dump begins with the formation on the project contour of the lower rus a ridge of waterproof rocks k with a height equal to the height of the rus. Further dumping of rocks on the internal dump is made in the direction of the non-working side of the 5th pit. As far as filling

thirty

35

invention formula

A method of open-cast development of salt fields, including drainage of the quarry floor by drainage trenches and water-lowering wells, mining of overburden and mining ledges, dumping of an external salt dump with polluted rocks, isolation of the salt dump with waterproof rocks and water trapping on benches and Rus, characterized by the fact that to increase the efficiency of mining of salt deposits by reducing the leaching of the pit sides and the heap from precipitation while reducing the cost of developing the deposits, after the open space inside the pit contour along the working side forms a ridge of waterproof rocks, and the internal salt dump dumps 6 overburden 2 salt-bearing rocks with 40 bits from the ridge to the non-working board with laying between the layers of waterproof rocks, and the working platforms the overburden and mining ledges and the surface of the blade shaft are formed with a bias towards the development of the mining front.

They make its surface insulated by covering it with a layer of waterproof rocks 7, for example, rocks of a gypsum-clay slab. The height of the gypsum-clay rock layer provides reliable waterproofing. the saltwater dump is in range

five

0

g

0

five

lakh 0.5–0.8 m. In order to catch precipitation at the inner saltwater surface of the river, the slope is inclined towards the non-working side of the 5th pit. At the boundary of each river with a slope L of the non-working side of the pit, a temporary sump 9 is formed. Atmospheric precipitation along the layer of waterproof rocks 7 enters a temporary sump 9, from where pumps 10 are pumped to storage tanks. After dumping the bottom rus in the same sequence, i.e. beginning with the city of the rubble of waterproof rocks, proceed to the dumping of the next Rus.

invention formula

A method of open-cast development of salt deposits, including drainage of the quarry floor by drainage trenches and water-lowering wells, mining of overburden and mining ledges, dumping of an external salt dump by means of pristine rocks, isolation of the salt dump by waterproof rocks and water trapping on the ledges and rus, characterized by the fact that increasing the efficiency of mining of salt deposits by reducing the leaching of the pit sides and the dump from precipitation while reducing the cost of developing the deposits, after Calling out the excavated space within the pit contour along the working side forms a ridge of waterproof rocks, and dumping of the internal salt dump is carried out with crests from the ridge to the non-working board with laying of dusts of waterproof breeds between the channels, and the working platforms of the overburden and mining ledges and the surface of the scum bed form with a bias towards the development of a mining front.

X

Claims (1)

Claim A method for open-pit mining of salt deposits, including drainage of the quarry field with drainage trenches and water-reducing wells, overburden and production ledge mining, tiering of the external soil dump, waterproofing of the salt dump and water storage on ledges and tiers, in order to increase the efficiency of mining deposits by reducing the leaching of the sides of the quarry and dump from atmospheric precipitation while reducing the cost of developing deposits, after formed The worked-out space within the quarry contour along the working board forms a ridge of waterproof rocks, and the dumping of the internal salt dump is carried out in tiers from the ridge to the non-working board with a layer of waterproof rocks laid between the tiers, and the working platforms of overburden and mining ledges and the surface of the dump tier are formed with a slope towards the direction of development of the mining front.