Method for worked-out pit reclamation

FIELD: mining and processing industry, particularly to reclaim soil in agriculture and building and power engineering industries.

SUBSTANCE: method involves performing selective mining, conveying and stacking ground layer and overburden in separate strip dumps; developing pit field; filling exhausted space with building waste in several layers along with rolling of each building waste layer; leveling thereof with overburden and laying ground layer. Pit is filled with building waste up to mid-height pit level, but not under ground water level. After that building waste is rolled and covered with overburden for total pit filling. Then overburden layer is leveled. To prevent ground settlement wells are formed along filled pit surface, wherein the wells are formed up to design depth and are filled with building waste with each building waste portion compaction. Overburden layer, building waste layer, reinforced structure level formed of geo-synthetic sleeves filled with building waste milled to obtain particle dimensions of not more than 150 mm are serially laid on filled pit.

EFFECT: decreased labor inputs and costs.

1 dwg

 

The invention relates to the mining and processing industry and can be used to restore disturbed lands in agriculture, construction and energy industries.

There is a method of recovery of disturbed soils [1] in surface mining, including mining, moving and storage in separate tape stockpiles of topsoil and overburden, mining career fields, moving, and packing overburden and topsoil. However, restoration of disturbed lands in this method occurs over a very long period, and the soil exposed to wind and water erosion.

The closest technical solution, selected as a prototype, is the way of restoration of disturbed lands in open field development [2], which includes a separate recess, moving and storage in separate tape stockpiles of topsoil and overburden, mining career fields, mined-out space construction waste, similar in composition to natural materials, layers with compaction of each layer with the further alignment of the overburden and the subsequent confinement of the soil layer. The disadvantage of this method is the extraction of large volumes of soil to create vodorodnogo layer, which in turn leads to the formation of large areas of disturbed land, rising labor costs and a significant increase in the cost of the rehabilitation works.

The proposed solution provides cost reduction and cost recovery operations.

This is achieved in that in the method of restoring the depleted quarries for construction of structures including separate recess, moving and storage in separate tape stockpiles of topsoil and overburden, the development of career fields, mined-out space construction waste layers with compaction of each layer, then align the overburden and laying soil soil layer, according to the invention backfilling of quarry with debris produce up to level half the height of career, happen even earlier, and then occiput the overburden to fill out space quarries, followed by alignment, in addition, on the surface of the filled pits to eliminate subsidence of the soil is rolled well up the calculated depths and portions hammer their construction waste seal each portion. Then on the entire surface of the thus treated quarries stack layers: a layer of overburden, the layer construction waste and the layer of armocondtrol is, made of geosynthetic material in the form of sleeves, filled with construction waste, shredded to a particle size fractions not exceeding 150 mm In the quality of construction waste use accidents, burnt brick, concrete, reinforced concrete, ceramic tile. Thus, a system of "basic Foundation" for further construction of any structures. The use of bored piles in conjunction with layer-by-layer stacking of layers of overburden, construction waste and armconstruction made of geosynthetic material in the form of sleeves filled with crushed construction waste of a particular size fractions reduces the volume of work involved and the cost for further recovery and use of land disturbed by surface mining fields.

Implementation of the present invention reduces the cost of rehabilitation services, through the use of construction waste that is constantly forming as a result of reconstruction, demolition and repair of buildings and structures, as well as eliminating the need for extraction of large volumes of soil to create a fertile layer. Given the fact that is constantly generated construction waste taken to landfills for household and industrial waste, the implementation of the present invention allows the it to improve the environmental situation.

The drawing shows the circuit implementation of this method.

The method is as follows.

First PA disturbed area perform planning work. The mean absolute stamp set with the feasibility study. The layout of the site comply with planned giving the surface a slight bias towards the General lowering of the earth's surface. Then make a preliminary backfilling of the open pit (1) construction waste layers (2, 3, 4) with different particle size fractions up to half of its height (h), but not below the groundwater level. Each layer is compacted by the method of compacting sealing machines and mechanisms. Then occiput quarry (1) until filling is complete in the overburden (5) and align the square. Then on the surface of the filled pits to eliminate subsidence of soils by unrolling device is rolled well (6) to the estimated depth and portions hammer their construction waste (7) seal each portion using the unrolling device by transferring axial forces to 10 ATM. The seal portions produce until "failure" is a conventional limit equilibrium that occurs when the resistance from the soil to the unrolling device equal to 10 ATM. Eliminate sagging properties of overburden with additional relief wells is happening is due to:

- draining soil in kalokairinou space and the formation of a compacted zone (8);

- overlay of compacted zones of near-wellbore adjacent piles;

- create a clip of the printed relief wells, which reduces the possibility of lateral expansion of the transformed array overburden.

Then over the entire surface areas thus treated quarries layer stack of alternating layers: a layer of overburden (9), the layer of debris (10) and the layer of armconstruction (11)made of geosynthetic material in the form of sleeves of specified diameter and length, filled with construction waste, shredded to a particle size fractions not exceeding 150 mm.

Sources of information

1. USSR author's certificate No. 1062392, CL IS 41/00, 1983

2. Patent of Russia №2274749, CL IS 41/32, BI No. 11, 2006

The way of restoration of worked-out quarries, including separate recess, moving and storage in separate tape stockpiles of topsoil and overburden, the development of career fields, mined-out space construction waste layers with compaction of each layer, then align the overburden and laying soil soil layer, characterized in that the filling of quarries and construction waste to produce Polo the ins height of career, but not below the groundwater level, happen even earlier, and then occiput the overburden to fill out space quarries, followed by alignment, in addition, on the surface of the filled pits, to correct subsidence of soil, roll well before the estimated depth and portions hammer their construction waste seal each portion, then the whole surface of the thus treated quarries stack layers: a layer of overburden, the layer construction waste and the layer of armconstruction made of geosynthetic material in the form of sleeves, filled with construction waste, shredded to a particle size fractions not exceeding 150 mm



 

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EFFECT: decreased labor inputs and reclamation work costs.

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