RU2598609C1 - Method for open development of mineral deposits using excavator-crane line - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention relates to mining industry. Method involves development of protrusions with cuts, characterised by that, on bench slope a sub-protrusion is made with further provision of transport strip for transportation of rock, wherein dimensions of sub-protrusion are determined from following conditions: length of sub-protrusion: L_p ≥ 2δ+ b_ts, where δ is safe distance berm; b_ts is width of vehicle; height of sub-protrusion: H_p ≥ H_ts, where H_ts is height of vehicle.

EFFECT: cutting working cycle by time of turning bucket to place of its unloading, which improves efficiency.

1 cl, 1 dwg

Description

This invention relates to the mining industry and can be used mainly in the field of mining in the development of mineral deposits by open cast mining.

A known method of developing mineral deposits in a quarry, including mining a field with a normal ledge height until the maximum development of mining, in which the current stripping ratio is equal to the boundary (RU 2490463 C1, E21C 41/26 from 02/06/2012, publ. 08/20/2013) .

The disadvantage of this method is the difficulty of switching to a highly affordable technology in connection with the necessary replacement of mining and loading equipment.

The closest in technical essence and the achieved result is a method of open-pit mining of mineral deposits, including drilling and blasting rocks with ledges, mining them with drill holes, turning vehicles in the face, forming a protective shaft on the working site along the edge of the ledge along the border with the transport lane (SU 1794191 A3 , E21C 41/26 from 06/27/1990, publ. 02/07/1993).

The disadvantage of this method is the long duration of excavation and loading operations.

The main task is to increase the productivity of the excavator by irrevocably unloading the rock in vehicles installed on the sub-mast in the crane area of the crane line.

This is achieved by the fact that in the method of open-pit mining of mineral deposits using a crane excavator, including the mining of ledges by sunset, on the slope of the mining ledge a pre-approach is preliminarily carried out with further provision of a transport lane for transporting rocks, and the dimensions of the approach are determined from the conditions:

podustupa length: L _{n are} ≥2δ + b,

where δ is the berm of a safe distance; b _tf is the width of the vehicle;

approach height: H _p ≥N _tf ,

where H _tf is the height of the vehicle.

Creating a sub-access to accommodate the means of transporting the rock provides the ability to unload the rock with an excavator without turning the platform, which improves the productivity of the excavator. And the use of craneline allows you to work out high ledges, which reduces the cost of transporting rock from the quarry.

The method is illustrated graphically, which presents a crane excavator 1, vehicle 2, access 3, ledge 4.

The method is as follows.

The mining of the mining ledge 4 is carried out using an excavator-craneline 1. Using the craneline allows you to work out high ledges and load the rock mass into the means of transportation. However, the loading time is 70% of the working time of the total cycle time. To eliminate the time of turning the platform for unloading, a pre-step 3 is preliminarily taken. The height of the sub-step must be no more than the height of the vehicle 2. Transport is automobile, since the road on the sub-step is unsteady, and considerable costs are required for the re-routing of railway lines or conveyor vehicles. The vehicle traffic pattern is used through to reduce its width, with the provision of the necessary exits and exits. After filling the bucket, the driveway of the vehicle is carried out in the shooting area for unloading.

The advantage of this method of open pit mining of mineral deposits is that the working cycle is reduced by the time the bucket turns to the place of unloading, which leads to an increase in productivity. The visibility of the excavator driver for unloading the bucket is also improved.

Claims (1)

A method for open-pit mining of mineral deposits using a crane excavator, including mining of ledges by sunset, characterized in that on the slope of the mining ledge a pre-approach is preliminarily carried out with further provision of a transport lane for transporting rocks, and the dimensions of the approach are determined from the conditions:
podustupa length: L _{n are} ≥2δ + b,
where δ is the berm of a safe distance; b _tf is the width of the vehicle;
podustupa height: H _{n are} ≥N,
where N _tf is the height of the vehicle.

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