SU968402A1 - Method of working sloping deposits when mining deep levels of an open mine - Google Patents

Description

The invention relates to the mining industry, namely to the open-cast mining.

There is a method of open mining, {mining of minerals with internal dumping, which includes mining the quarry floor with split trenches with erection of transport bridges in the places of bending of the mining front 1.

The disadvantage of the method is that it is designed to solve the problem of shortening the transportation distance of the rock mass from the opposite sides of the quarry to one delivery point.

The closest to the invention to the technical essence is the method of development of steeply dipping deposits during the mining of deep horizons of the open-pit mine, which includes external evaporation and placement. . rock formations on a horizontal platform inside the pit 2.

However, although the method provides for the placement of rocks: on the site inside the pit on the contact of clay and rock, it does not answer the question of further transport of the depopulated overburden.

The purpose of the invention is to reduce the laboriousness of the overburden operations and reduce the area for external dumping due to the many; 6 times the transshipment of the overburden inside the quarry.

This goal is achieved by placing a horizontal platform on

10 of the pit and is divided along its length into three equal zones - preparatory, dumping, and mining operations; in this case, as the pit deepens, they alternate between

15 zones.

FIG. Figure 1 shows the state and mode of mining at the deep horizons of the quarry at some fixed moment of time; in fig. 2 20 change of operation modes in zones after some time, when the mining zone has already been worked up to o) the maximum depth; on fit. 3 g the following change in the modes of operation in the quarry zones with 25 further lowering of mining operations.

Claims (2)

In zone 1 of the preparatory work, stripping work is carried out to prepare the ore for mining. In the mining zone 2, ore is mined and continuous stripping works are carried out. At the same time, part of the mine from the mining and preparation areas is moved to the zone of 3 dump works, where it is maintained. internal dumping. As the quarry deepens, after mining the mining zone to a certain depth, it moves to the dumping area, at the same time, the preparatory works move to the mining zone, and the dumping area moves to the preparation area. With further lowering of mining operations (when mining the mining zone to a certain depth), the change in the modes of mountain workings in the selected zones occurs in a similar way. Thus, as the quarry is mined, multiple transshipment of the overburden within the pit is carried out. When working the quarry according to the proposed method, the distance and transit time of the overburden rocks are significantly reduced, transport and maintenance personnel are released, and the conditions for the transportation of overburden rocks are improved, although the volume of transported rock overburden increases. All this makes it possible to significantly reduce material and labor costs for rock transportation. when developing deep horizons of the quarry and .initify mining operations, and at the same time reduce the area for the external holes This is due to the placement of a part of stripping inside the quarry. The economic effect from the introduction of the proposed method on open-cast mines during the development of deep horizons will be about 1.6 million rubles. one career each. The invention of the Method of developing steeply dipping deposits during the mining of deep horizons of a quarry, including out-of-depth dumping, placement of rocks on a horizontal platform inside the open-pit mine, which is also distinguished by the fact that, in order to reduce the labor intensity of the overburden works and reduce the area for external dumping due to multiple transshipment overburden inside the pit, a horizontal platform, is placed at the bottom of the pit and is divided along its length into three equal areas - preparatory, dumping and mining, etc. and this, as the quarry deepened. The alternating change of the indicated zones was carried out. Sources of information / taken into account during the examination 1. Author's certificate of the USSR No. 723139, jOi. E 21 C 41/02, 1980. 2. USSR author's certificate No. 622977, cl. E 21 C 41/02, 1978 (prototype). th K "5Y5 5 K IL" 5 55 "" ". //////// §: J «« j j «is J S fWi S / g F (/ r.5