SU1479645A1 - Method of strip mining of mineral depostits - Google Patents

Abstract

This invention relates to the mining industry and can be used in open pit mining. The goal is to increase the intensity of the development of the field, reducing the cost of carrying out the opening workings and transportation of the rock mass. The deposit is opened by underground workings. Along the final contour of the pit, the mine passes through the pit angle. Combined ore passes with an underground excavation. The development of the ledges from the ore passes in the direction of the development of mining operations. When working out the second and subsequent lower ledges, the ore pass is opened into a rudoscate. Rudoskat on each horizon equip unloading platforms. The rock of the shoulders being processed at the same time is delivered to the ore scour and unloaded. Simultaneously with the development of ledges are deepening ore passes to the underlying revealing underground workings.

Description

This invention relates to the mining industry and can be used in open pit mining.

Lel invention - increasing the intensity of the development of the field, reducing the cost of carrying out opening workings and transportation of rock mass

The method of opencast mining is carried out as follows.

The quarry chosen for mining or its section is opened in the plan and in height by underground workings, for example, a railway tunnel for the movement of trunk transport, a trunk equipped with a conveyor lift 9, etc. at a given depth beneath the quarry, the underground production goes into the horizontal one, where a station is constructed to load the rock mass onto the mainline Ransport. Then, at the same time, both from the surface and from the horizontal portion of the opening 45

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i.e. two faces, an oblique ore passage takes place. At the same time, the longitudinal axis of the ore-landing is combined with the boundary of the marginal contour of the quarry.

At the end of the penetration of the ore pass, they start working out the upper ledge of the group of openings, open-ended

system of opening workings. Mining leads from ore passes to the development of mining in the contour of the quarry.

In the initial stage of mining, directly at the mouth of the mine, the array is filled with boreholes (boreholes) of reduced diameter with their appropriate dispersion, ensuring a sufficient degree of crushing to prevent the formation of oversized pieces of blasted rock mass discharged by the explosion directly into the mine. The rock mass, not dumped by an explosion into the ore-release, is dumped from the near zone with the help of bulldozers, and, with a more distant one, with auto-loaders or an excavator. As a result, the ore passes on this ledge are opened into a rudoscate, the bed of which forms the remaining lying intact part of the ore pass, passed beyond the boundary of the open-pit margin:

In the upper part, the mines on both sides of the transport horizon are equipped with unloading platforms that ensure the safe operation of the intracavity assembly vehicles (for example, dump trucks), which deliver rock mass from the working faces of the ledge to the minescale. The horn mass through the ore scour enters the unopened lower part of the ore pass, from which it is loaded through specially equipped hatches to the main transport (for example, trains, conveyor, etc.).

As mining operations develop on the ledge intersected by the ore scour, at the base of the latter, above the mouth of the landing gear, unloading platforms are also equipped to receive rock mass

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from the intra-career assembly transport, which is introduced with a sufficient distance of the faces from the ore pass. Further development of mining operations at this ledge is carried out using conventional technology for the introduction of drilling and blasting and mining operations.

With sufficient opening of the roof of the underlying bench, it is tested according to the technology described above.

Thus, all the ledges opened by the proposed system of opening workings are put into operation. As a result, the ore pass is opened into a rudder over its entire depth. At the same time, the underground loading complex is redeemed and on this horizon they equip an open-type transshipment point.

Simultaneously with the development of a group of ledges, to the height of which the ore passes are passed, the underground excavation workings are dredged and the new ore passes are driven to the height of the lower group of ledges, which are then worked out according to the technology described above.

Claims (1)

Invention Formula A method of open-pit mining of mineral deposits, including opening by underground workings, conducting ore passes for gravitational delivery of rock mass, quarrying with ledges in project contours, characterized in that, in order to increase the intensity of mining, reduce the costs of opening workings and transport the mountain the masses, the ore passes, pass along the marginal contour of the quarry, the development of ledges is carried out from the ore scour in the direction of the development of mining operations, consistently with from top to bottom, open the ore dredging into the ore scour as the subsequent ledges are put into development, form an unloading site on each ledge, move the mountain mass of the ledges to be mined along the ore dredge;