Method of mining operations in fan-mining method

FIELD: mining.

SUBSTANCE: invention relates to the mining industry and can be used in development of large deposits of commercial minerals of hollow and tilting occurrence with use of the technique of continuous action with the open-pit mining. The method comprises permanent and initial trenching, mounting of transportation lines, excavation of commercial minerals by mining with wedged stopes. The mining with wedged stopes is carried out from the maximum width of excavation stope to the stope width BTi, which enables movement of transportation lines to the next wedged stope in accordance with the condition: B T i = ( B M A X e t g [ ( i + 1 ) a ] ) t g ( i a ) , where BMAX is the maximum width of the excavation stope; e is the distance from the forehead to the transportation lines; a is the angle of rotation of the front of mining operations; i is the serial number of the wedged stope. The subsequent wedged stopes are mined also from the maximum width of the excavation stope, while capturing the unmined part of the previous stope.

EFFECT: increase in productivity of excavation and loading complex in mining of deposits of commercial minerals by fan-mining method.

3 dwg

 

The invention relates to the mining industry and can be used to develop powerful mineral deposits hollow and inclined bedding using the techniques of continuous operation in an open way.

There is a method of open pit mining of minerals for the development of difficult structural fields with steep or sloping fall layers of different strength. Goal - improving the efficiency of the averaging of the rocks in the mine due to the possibility of quality control when blasting blasting rock bottom. To do this, hold the split trench and Orient it along the contact of rocks with pin inside the contour of the trench, which work out wedge-shaped benches. The width of zagadki set smaller than the width of a cutting trench. The top of the wedge is oriented in an array of rocks and placed on the contact rocks or the projection of the contact on the horizontal plane. The angle of the vertex of the wedge take around 80-90 degrees. Square Zachodni drilling of wells series, parallel, forming a wedge-zagadki. The wells are then charged and produce blasting rows of wells alternately from each side, forming a wedge-shaped section, and start blasting with hard rock. At the moment of explosion occurs layer-by-layer overlaying rocks one strength to another breed firmly the tee. When excavation of blasted rock additionally, the operation of mixing different breeds strength [patent RU No. 1652553, publ. 30.05.1991, IPC IS 41/00].

This method of development is characterized by low efficiency associated with complex organization in working one part of the career fields with the use of a longitudinal system, and the other fan and periodic dredging "wedges" at the beginning of each zagadki.

The closest in technical essence is a way of open development of mineral deposits horizontal and hollow occurrence using the techniques of continuous action, the development of overburden produce wedge-shaped benches with full notch wedge (RF patent No. 2394157, IPC IS 41/26. The method of open pit mining of mineral deposits / Fedorov A. C., Shorokhov B. N., and others).

This method of development is characterized by low efficiency, excavation and loading complex in the wedge section.

The present invention is expressed in increasing productivity, excavation and loading of complex development of mineral deposits in a fan system development.

The technical result is achieved in that in the method of mining at fan system design, including the sinking of capital and split t is Ansei, installation of transport and communications, the excavation of minerals by mining wedge-shaped benches, testing, wedge-shaped benches carried out with a maximum width of excavation zagadki to the width of zagadki BTithat provides shifting of the transport communications to the next wedge the section in accordance with condition:

BTi=(BMAX-etg[(i+1)a])tg(ia)

where Bmax- maximum width of excavation Zachodni; e is the distance from the bottom to transport communications; and - the angle of rotation of the excavation front; i is the number of wedge-zagadki,

subsequent wedge Zachodni also work with a maximum width of excavation zagadki, while capturing the uncovered part of the previous zagadki.

The invention is illustrated graphically.

In figures 1-3 are depicted in terms of the movement of the front work on three stages worked wedge-shaped benches, where: 1 - the boundary of a mining allotment is; 2 - capital trench; 3 - split the trench; 4 - main pipeline; 5 - AFC; 6 - wedge section; 7 - excavation and loading complex; 8 - the uncovered part of the previous zagadki.

The method consists in the following. Using well-known ways and means passed 2 capital and built split 3 of the trench, where the trunk 4 and hole 5 conveyors. The development of overburden and excavation of minerals produce wedge-shaped benches 6 through excavation and loading of complex 7. Initially, the development of the first wedge-zagadki starts with a maximum width of zagadki Bmaxand ends reaching the width of zagadki BTi[Fig.1]:

in accordance with condition:

BTi=(BMAX-etg[(i+1)a])tg(ia)

where Bmax- maximum width of excavation Zachodni; e is the distance from the bottom to transport communications; and - the angle of rotation of the excavation front; i is the number of the wedge is prominent zagadki.

The following wedge section being tested also with width Bmaxand passed to the width Bticalculated by the formula (1)given the uncovered part of the previous Zachodni 8. Upon reaching the width of zagadki equal Intiis driving, excavation and loading complex on the new section, and then is relaying transport communications at a distance e [Fig.2].

Subsequent wedge section being tested to the width Btiwhile capturing already uncovered parts of the previous benches. AFC is located at an angle at a safe distance from bottom e at the end of works on improvement of the previous zachodnie etc. as developing new wedge-shaped benches in the boundaries of the mining allotment 1 [Fig.3].

The invention will improve the efficiency of excavation and loading complex when using a fan system development of mineral deposits due to the exclusion of the work of excavation equipment in the narrow parts of the wedge-zagadki due to gradual its return.

The method of mining at fan system design, including the sinking of capital and cutting trench, installation of transport and communications, the excavation of minerals by mining wedge-shaped benches, characterized in that the testing of CL is nevidnih benches carried out with a maximum width of excavation zagadki to the width of zagadki B Tithat provides shifting of the transport communications to the next wedge the section in accordance with condition:
BTi=(BMAX-etg[(i+1)a])tg(ia)
where Bmax- maximum width of excavation Zachodni; e is the distance from the bottom to transport communications; and - the angle of rotation of the excavation front; i is the number of wedge-zagadki,
subsequent wedge Zachodni also work with a maximum width of excavation zagadki, while capturing the uncovered part of the previous zagadki.



 

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FIELD: mining.

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EFFECT: higher efficiency, higher productiveness.

2 cl, 6 dwg, 1 ex

FIELD: mining industry.

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EFFECT: higher efficiency.

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FIELD: mining industry.

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EFFECT: higher efficiency.

2 dwg

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EFFECT: enhanced stability of high benches on the outline of the open pit.

2 cl, 3 dwg, 1 ex

FIELD: mining industry.

SUBSTANCE: method includes opening deposit at distance 150 meters from river and forming of natural filtering wall between river and trench, pumping of water from trench into river, extraction of mineral resource, revegetation of dumps, filling of trench with water, accomplishment of formed water body. Mineral resource is extracted from two serially opened trenches - auxiliary, revegetated as water body, and main, positioned at opposite side of river, and soil from opening of which is used for revegetation of auxiliary trench, while in main trench along whole board on the side of river right beyond mining operations inner dump is formed with width not less than 250 meters and with height at same level with earth surface, water from trenches is fed into river, and then into water body through intermediate collectors, while after forming of water body currents of soil waters between trenches and river are made balanced, balance level is estimated on basis of water levels in auxiliary trench and river.

EFFECT: higher efficiency.

1 dwg, 1 ex

FIELD: mining industry.

SUBSTANCE: method includes extraction of quarry to planned depth in stages with construction f boards with parameters, allowed from stability condition, shutting boards, finishing mineral resource massif. Building and shutting of temporary boards during extraction of steep layers of next level after change of order of extraction of opening and ore zones is started after construction and spacing in center of cut of well-like mine with vertical shelves, with parameters, which are provided for by minimal radiuses of rounded edges enough for movement of rock via spiral chutes to surface to outer dumps, with narrowing space towards bottom at level of opened level of deep portion of deposit with lesser total coefficient of opening of stage and finally board is constructed by steep vertical shelves in deep zone.

EFFECT: higher efficiency.

1 ex, 10 dwg

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