Method of making steep trench

FIELD: mining.

SUBSTANCE: method comprises making a steep trench using a wheel loader and motor transport, capable to climb steep slopes. Making the trench is carried out in several stages, dividing the steep trench to steeply inclined-horizontal layers with height calculated by taking into account the motion trajectory of the loader bucket, which are mined successively downward. When mining each successive layer the rock mass is preliminary loosened, the loader carries out its withdrawal, delivery and unloading to the motor transport placed at horizontal areas as close as possible to the forehead.

EFFECT: improving efficiency of mining.

2 dwg

 

The invention relates to mining and can be used at the opening of the deep horizons career.

There is a method of forming an inclined transport of the trench on the blasted rock mass mechanical shovel with bottom loading into dump trucks (B. C. Khokhryakov. Open development of mineral deposits. - M.: Nedra, 1991, S. 37).

The disadvantage of this method is the inability to use excavators with sinking steep trenches as technical characteristics for shovel crawler excavators made during excavation of the slope of the working platform should not exceed 3°, and the longitudinal slope steeply congresses ranges from 12° to 15° .

There is also known a method of conducting a steep trench exposing the horizon with limited space for trucks, can overcome the steep slope (Patent 2376471 of the Russian Federation, IPC E21C 41/26 Way for steep trench // Appl. 30.04.2008, publ. 20.12.2009, bull. No. 35).

The method includes holding a temporary trench at an angle of 5-6° to reveal horizon overlying horizon on the loosened rock mass. At the end of this trench to form a horizontal platform, which extend, actuating the rock mass initially under part of the Foundation of the temporary trench, and forming part of the Foundation trenches on steep width. This mountain mA is su transported through the remainder of the Foundation of the temporary trench. Then fire the rock mass under the remaining part of the Foundation of the temporary trench and forming another part of the base of the steep trench along its width, transporting the rock mass already formed part of the base of the steep trench.

However, this method cannot be used when conducting a steep trench exposing the horizon with limited space for trucks, capable of overcoming the bias of 12-15°, as required when performing steep trenches complete large volumes of work and open spaces associated with pre-construction and placement of the temporary trench with a slope of 3°, and the increased distance transportation of rock mass in the course of time and then a steep trench. The application of this method is limited by the width of the bottom of the quarry, at least 100-120 m

The known method of forming a steeply Congress (Patent 2425220 of the Russian Federation, IPC E21C 41/26 Method of forming a steeply Congress / Appl. 10.02.2010, publ. 27.07.2011, bull. No. 21).

The method involves the blasting of the rock, the driving time of the inclined trench width with a horizontal platform at its base, the testing of blasted rock wedge-shaped benches, starting from the bottom, with the use of an excavator, in one half of the inclined trench from worked-out areas is. In the second half of the trench perform transportation of rock mass on the surface of the upper section work with a bulldozer, transported the rock mass at the bottom of the lower zagadki, form the plot of a steeply Congress. Work similarly to the second half of the inclined trench, transporting the rock mass on an already formed stretch of steeply Congress, reduce the width of the sections of the Congress to project and form the lower part of the slope steeply Congress on project marks.

The disadvantage of this method is that it is in widespread height of the ledge 15 m may only be used when the length of the horizon of not less than 200-250 m

The aim of the invention is to increase the efficiency of field development due to a steep trench exposing the horizon with limited space, with a minimum amount of work for dump trucks, can overcome the steep slope, with a full excavation of minerals in the career without additional spacing flanges and haulage from the trench to the surface.

The objective is achieved in that the holding steep trenches for vehicles that are able to overcome steep gradients, carried out using a wheel loader in several stages, dividing the steep trench on crotonylene-horizon is further layers, height is determined based on the trajectory of the bucket loader, which work sequentially from top to bottom, when developing each layer of the rock mass pre loosen, the truck makes its recess, delivery and unloading in road transport, set to as close as possible to the bottom horizontal platforms.

This set of essential features of the proposed method will reduce the amount of work and time to conduct steep trenches, to reduce the number of employed equipment, to reduce the distance of transportation of rock excavated when conducting a steep trench, to reduce the size of the bottom and to increase the depth of the quarry without additional spacing of the boards.

The method is illustrated graphically, where Fig.1 depicts the launch of the steep trench, which consists in working out the loosened rock mass steeply inclined part of the upper crotonylene-horizontal layer with the use of wheel loader with overload in automobile transport means located on the nearest horizontal surface formed outside the trench. In Fig.2 shows the position when the truck was shipped volumes steeply inclined part of the upper layer and moved along the horizontal part at a distance, providing the possibility is of aesd road transport for loading directly on the horizontal area of the upper horizontal layer.

The method is as follows.

Conducting a steep trench is performed using a wheel loader 1 and road transport 2 (Fig.1). For this steep trench 3 is divided into crotonylene-horizontal layers 4, at the entrance having a steeply inclined sections 5, which are the surface formed by the steep trench. The height of the layer is taken with regard to the trajectory of the bucket loader. Development of the layers is made from the top down with the preliminary loosening of the next working layer. In early testing of each layer, when the loader runs on the slope road transport have on the nearest horizontal surface 6 outside formed a steep trench. After working steeply inclined portion of the layer when the loader to work its horizontal part, created a horizontal platform 7, sufficient to accommodate road transport (Fig.2), the last one to put the history of this site. Similarly, work out all other layers. When developing a steeply plots crotonylene-horizontal layers of road transport pose a loading outside formed a steep trench, when in the next working layer of the horizontal section of sufficient length road transport cast on is Rusko closer to the truck. The rock mass from the trench is removed to the surface.

The use of the proposed method to form a steep trench exposing the horizon with limited space for trucks, can overcome the steep slope, for example, with articulated, full excavation of minerals in the career without additional spacing flanges and haulage from the trench to the surface.

Sources of information

1. RF patent №2376471.

2. RF patent №2425220.

3. Khokhryakov B. C. Open development of mineral deposits. - M.: Nedra, 1991, S. 37 (prototype).

Way cool trench for motor vehicles, is able to overcome steep gradients, characterized in that the trench is performed using a wheel loader in several stages, dividing the steep trench on crotonylene-horizontal layers with a height that is determined based on the trajectory of the bucket loader, which work sequentially from top to bottom, when developing each layer of the rock mass pre loosen, the truck makes its recess, delivery and unloading in road transport, set to as close as possible to the bottom horizontal platforms.



 

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EFFECT: higher efficiency.

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FIELD: mining industry.

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EFFECT: higher efficiency, higher productiveness.

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FIELD: mining industry.

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EFFECT: higher efficiency.

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EFFECT: higher efficiency.

2 dwg

FIELD: mining industry, applicable for slanting of high benches at development of magmatic deposits of mineral resources by open pit.

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FIELD: mining industry.

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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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