SU756009A1 - Method of open-pit mining - Google Patents

Description

The invention relates to the mining industry and can be used in the open development of mineral deposits.

There is a method of opencast mining of minerals, including a trench and installation in the specified trench conveyor lift [1].

There is also known a method of open-cast mining of mineral deposits, including multi-row blasting of paired ledges on a temporary non-working board of a quarry, leaving reduced working sites and installing a conveyor lift on them with subsequent dismantling of the lift and working off a temporary non-working side [2].

However, both of these methods are characterized by insufficient intensity of working off the temporary non-working side.

The aim of the invention is to eliminate this drawback.

The goal is achieved by the fact that they produce rock blasting to the entire height of the temporarily non-working side, the lift is installed on the blasted rock mass and after de2

installation of the lift every at least two ledges along the entire height of the temporarily non-working side cascadely increase the working sites, excavating the rock mass from the overlying ledge to the underlying,

₅ and work out the last inclined congresses.

FIG. 1 shows a diagram of the sequential formation of a non-working side; in fig. 2 is a diagram of a temporarily formed non-working side with a fan conveyor installed; in fig. 3 is a diagram of the formation of working platforms of normal width on a temporary non-working board; in fig. 4 - the same plan view; in fig. 5 is a diagram of working the working ledge; in fig. 6 -

same plan view.

The method consists in the following.

Starting from the upper horizon, the paired high ledges 1 are blown up along the entire height of the temporarily non-working side and they are partially worked out, leaving a temporary non-working 20 side from the ledges 2 with a blasted rock mass and reduced working platforms 3. On the temporary non-working board are a trench 4, the base of which is blown mountain mass and in a trench

3

756009

install the conveyor lift 5. After a certain period of work, the conveyor lift is dismantled and transferred, and the temporary non-working board is worked out. In this case, the rock mass is excavated cascade from overlying horizons to the temporarily non-operating side below the entire height, for which excavators 6 are installed on reduced work sites every two ledges, cascading up the reduced work sites, sites of 7 rock masses. For the sake of working sites, the excavator works out the run in 8 blocks 9. Then, the increased work sites from the blasted rock mass are worked out by inclined congresses 10, setting the excavators 6 apart from each other by the length of the exit. ¹⁵

This method will allow to intensify the processing of a temporarily non-working board.

Claims (1)

Claims ²⁰ The method of open development of mineral deposits, including multi-row blasting of twin ledges on a temporary non-working board of a pit, leaving reduced working sites and installing a conveyor lift on them with subsequent dismantling of the lift and working off a temporary non-working side, characterized in that, in order to intensify the development of a temporary non-working side, the rocks are blown to the full height of the last , the lift is installed on the blasted rock mass and after dismantling the lift every at least two ledges along the entire height of the temporarily outboard Kas Kadno increase work sites, excavating the mountain mass from the overlying ledge to the underlying, and work out the last inclined congresses.