Method of open development of steep deposits of area form

FIELD: mining.

SUBSTANCE: method comprises formation of the working area, the technology of mining of overburden benches and ensuring of load-transport communication of working horizons with the surface, mining of the overburden benches of the working area is carried out with excavators with elongated work equipment, taking the height of the benches equal to a sesquialteral height of digging of the excavators. At that, to prevent the collapse of deflectors and hangers on the bench slope above the height of the excavator digging the pre-splitting of its upper part is made by a) contour blasting or b) preliminary slit-formation, formation of the working area is carried out with the use of a cascade scheme of mining of overburden benches, at that the scope of work of each bench is divided to the passive with minimal working areas with a width that provides two-way movement of technology vehicles and its manoeuvring, and an active, working platforms of which include minimum working platforms, and volumes of overburden rocks ready for extraction, the relative length of active edge of each overburden bench is determined by the mathematical formula. Blasting of volumes of overburden rocks ready for extraction of the bench is carried out from the calculation for the entire blasted amount can not be completely placed on the working platform of this bench and on the minimal working platform of the underlying bench adjacent to it, opening the working benches is carried out by steep sliding ramps with longitudinal slope to 12-15° with the condition of use of vehicles that can overcome such slope, and the width providing location of collapse of blasted rock mass during their expansion and simultaneously through pass of process of technology vehicles, the expansion of steep ramps is carried out using track and wheel loaders by dividing the collapse of the blasted rock mass to the horizontal and inclined layers with height determined by taking into account the path of movement of the loader bucket.

EFFECT: reduction of current stripping ratio in the initial period of development of the deposit.

2 dwg

 

The invention relates to an open development steeply dipping deposits of minerals areal form.

There is a method of increasing the angles of the slopes of work boards based on incremental development, fields [1]. The essence of the method consists in the temporary preservation of the individual ledges, in which the Board is temporarily off. Conservation is at an angle close to the angle of repayment limit pit. Upon reaching temporarily outside the Board estimated height, start spacing the upper horizons, but continues to raise the height temporarily outside of the bottom side due to ongoing uglubki career. Thus, the site is temporarily non-working Board "glides" along the contour of the stage. Similarly produce mining areas temporarily outside of the bead formed on the circuit of the subsequent development phases. The economic efficiency of the method is achieved by reducing the current ratio due to the increase in the result of the slope of the working Board. The effectiveness increases with increasing angle of temporarily non-working boards. Large quarries volumes conserved overburden can reach several tens of millions of cubic meters of term conservation 10 years or more.

However, this method increases the Glov slopes of working boards has a significant drawback, consisting in the fact that the spacing of the upper horizons temporarily outside the Board accompanied by the ejection of rock during blasting. As a result, when a sufficiently steep angle of repose temporarily outside side the whole it may be completely covered blasted rock mass. This eliminates the possibility of accommodation in areas temporarily outside of the side revealing the workings and does not provide conditions for safe mining operations when casting in temporarily off downstream business horizons. Such phenomena are avoiding the fact that temporarily outside Board form, with a fairly wide berms, allowing to place the ejection blasted rock one-two horizons. But this leads to the plateau of the result of the slope of the working pit and to increase the current ratio in the initial period of operation of the quarry.

Known methods of open development of mineral deposits, including the formation of the working area of the quarry ledges temporarily non-working side, the spacing of the upper horizons temporarily outside Board simultaneously with its formation by bringing in temporarily off downstream business horizons, is a method, characterized in that the temporal horizons the outside side occiput defensive ramparts against rockfall intervals in height, equal to the height plots temporarily non-working side, and in permanent or temporarily outside Board career horizons shelter plantations shafts arrange transport berms, which are conventions for lower working levels within the interval depth equal to the height of the plot is temporarily inoperative Board[2], [3].

The disadvantage of this method is the necessity of gaining temporarily non-working Board for device transport berms and sites, sites with defensive ramparts and freight transportation interruption of communication between the sites temporarily outside of the bead when it is assembled, and the device protecting the shafts does not guarantee the security operations when the removal of pillars and works on production levels due to scattering of stones. Interrupt freight transportation links between areas in depth with the reactivation of the Board leads to the need for construction of additional conventions on the desktop Board and its plateau. The solution of the problem of opening due to the removal opening faces in a neighboring part of the working zone with the normal working sites and the construction of the connecting transport sites leads to an increase in current coefficients overburden and additional costs for development of the field.

The purpose of the present invention is the reduction of the current Stripping ratio in the initial period of development of steep deposits areal shape by increasing the result of the slope of the working Board. This goal is achieved by Stripping the ledges working accept the increased height (25-30 m), on the basis of their testing with the use of excavators with extended working equipment, as the technological scheme of the formation of the working area take the cascade scheme, characterized by the minimal size of the work sites, and for opening business horizons used moving congresses with an increased slope to 12-15° from the conditions of use of vehicles that are able to overcome such biases.

The method is illustrated by drawings, where Fig.1 shows a plan of the mining steeply dipping deposits areal forms in the present method at the time of the approach of the working Board 5 career to the limiting circuit on the surface 9 to the position ready for extraction volumes of overburden and revealing the workings, providing freight transportation communication business horizons to the surface in the process of development of mining operations; Fig.2 a cross-section of the field, reflecting the position ready for extraction volumes of overburden in the working area career and technology of their notches.

The inventive method is as follows. When forming the working area mine area of the form to perform the Stripping activity is used excavators with increased work equipment is receiving upgrades "Y" and "Y with". The height of overburden benches is equal to half the height decreased excavators. To prevent collapse from the upper side slopes of terraces navica" and "peaks" and security operations under the terms of the rockfall upper part of the slopes of the scarp above the height of the stock of used excavators sadasivam by applying contour blasting and pre-saloobrazovanie. The formation of the working zone is produced with the use of the cascade scheme of mining overburden benches, while the front of each bench is divided into an active part 1 ready for extraction volumes of overburden 2 and the passive part 3, not having ready for extraction volumes. In the passive part of the front leave the minimum operating platform 4 wide, providing two-way traffic and maneuvering. In the active part of the width of the working platforms 5 are equal to the sum of the minimum width of the working platform and the width of the excavation of zagadki 6 ready for extraction volumes of overburden.

The relative length of the active edge of each Stripping ledge Dadetermined by the formula

,

where hwith- speed reduction of mining operations, m/year; hy- the height of a work bench, m; A is the width of the excavation of zagadki containing ready for extraction of Yemi overburden, m; t is the standard security ready for extraction volumes of overburden, year; α - angle of repose of the working bench, hail.

Blasting ready for extraction volumes of overburden bench is produced from the calculation, so that the whole blasted the volume can be fully placed on the working platform of this ledge and minimum working space adjacent the underlying ledge. Accordingly, the scheduling of mining operations produce so that the ledges are ready for extraction volumes were ledges with a minimum working sites. Excavation and loading work on these ledges produce separate excavators. For transportation of overburden on the surface of the used vehicle, able to overcome the steep slopes of up to 12-15°. Opening business horizons provide sliding congresses 7 wide, ensuring the location of the collapse of the shattered rock mass movement and at the same time a through passage technological transport. The longitudinal slope of congresses accept on the basis of technical capacity and bezopasnyh working conditions of vehicles. The construction and the movement of the sliding congresses in the new position is produced with the use of tracked and wheeled loaders by dividing the amount of transported congresses on the horizontal and the slope of the s layers height, determined based on the trajectory of the bucket loader.

The inventive method provides compared to the prototype of increasing the angle of inclination of the working pit at 5-8° and a significant reduction of the current coefficients of Stripping during the initial period of mining steeply dipping deposits areal form.

Sources of information

1. Khokhryakov B. C. Open field development stages. WPI. higher education institutions. Mining magazine, No. 10, 1965.

2. Patent RU 2064582 C1 IPC IS 41/26.

3. Linev B. N., Rubinstein, S. B. ensuring the safety of mining operations using temporarily inoperative boards. Mining journal, 2001, No. 5, S. 20-23.

Method of surface mining steeply dipping deposits areal forms, including the formation of the working area, the technology of mining overburden benches and providing freight transportation communication business horizons with the surface, wherein the testing of the overburden benches of the working area are excavators with extended work equipment, taking the height of the ledges equal to half the height of bailing excavator, thus to prevent the formation of peaks and Nafisa on the slope of the ledge above the height of the stock of excavator produce sodoku its upper part by a) contour blasting or (b) of the provisional saloobrazovanie, the formation of the working zone is produced with the application is receiving the cascade scheme of mining overburden benches, this scope of work of each ledge is divided into passive with a minimum working sites wide, providing two-way movement of industrial vehicles and maneuvering, and active, working platforms which include minimum operating platform and ready for extraction volumes of overburden, the relative length of the active edge of each Stripping ledge Dadetermined by the formula
,
where hwith- speed reduction of mining operations, m/year; hy- the height of a work bench, m; And - the width of the excavation of zagadki containing ready for extraction volumes of overburden, m; t is the standard security ready for extraction volumes of overburden, year; α - angle of repose of the working bench, grad.,
blasting ready for extraction volumes of overburden bench is produced from the calculation, so that the whole blasted the volume can be fully placed on the working platform of this ledge and minimum working space adjacent the underlying ledge, opening working ledges carry steep sliding congresses with longitudinal slopes up to 12-15° from the conditions of use of vehicles that are able to overcome this bias, and width to allow the collapse of blasted rock in their expansion, and at the same time end-to-end travel process transport expansion steep congresses produced with the use of tracked and wheeled loaders by dividing the collapse of the shattered rock mass on the horizontal and inclined layers height, determined based on the trajectory of the bucket loader.



 

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EFFECT: higher efficiency, higher productiveness.

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EFFECT: higher efficiency.

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

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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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