SU1758226A1 - Method of excavating steep trench - Google Patents

Abstract

The invention can be used when conducting a trench on board the quarry. The purpose of the invention is to reduce the volume of rock produced during the construction of a trench by reducing its base by eliminating the strip for assembly and transport work from the base while reducing mineral loss under the trench. The trench contour is determined on the final side of the pit, a niche is formed on each horizon, a rock of the ledge in the trench contours in the niches is triggered, mounds are planned to coincide with the trench profile and transport communications are formed on them. 1 hp f-ly, 6 ill.

Description

The invention relates to the mining industry, in particular to methods for constructing transport galleries on rocky sides of deep quarries.

There is a known method of building a transport gallery on a rocky side of a quarry, which includes the formation of a stepped half-trench and the excavation of excavations on the final side of the quarry, the actuation of steps and the dumping of rock mass in the corresponding below horizon with its subsequent planning and the formation of assembly-transport communication.

Such a set of operations provides the possibility of building a transport gallery on a rocky board of deep quarries, but at the same time there is a need to leave embankments of rocks for assembly and transport communications on the basis of the steep half-carriage, in particular, in the recesses of the niches covered at the end

board of the quarry, for which a significant amount of overburden is required.

There is another method of carrying out a steep trench, including determining the contour of a trench on the final side of the quarry, forming niches on each horizon, triggering rock rocks in the contours of the trench in the niches, planning embankments to coincide with the profile of the trench and forming transport communications,

The formation of transport communications on the highway, formed on the trench rocks planned in the niches, makes it possible to build a transport gallery on the basis of the trench, however, in this case, the volumes of the rocks produced during the construction of the trench will be very large, since the width of its base taking into account the installation strip -transport work will be unnecessarily large, which would entail the loss of mineral under the trench.

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The aim of the invention is to reduce the volume of rocks produced during the construction of a trench by reducing its base by eliminating the strip from the base for installation and transport work while reducing the loss of mineral under the trench.

This goal is achieved by the method of making a steep trench, including determining the trench contour on the final side of the quarry, forming niches on each horizon, triggering rocks in the trench contours in niches, planning embankments to match the profile of the trench, forming transport communications, pouring embankments rocks on each horizon, these embankments adjoin the trench contour, niches are formed in these embankments, and after planning the rocks of the specified embankments from them, munikatsy, wherein in order to reduce losses of minerals under the trench after forming the transport communications triggered rock embankment.

The use of the invention for the construction of transport galleries, in particular with steeply inclined conveyor lifts on quenched rock walls of quarries, provides a reduction in the volume of overburden operations and a reduction in mineral loss under the trench, since its base will be much smaller in width compared to traditional construction methods,

Fig, 1 shows the half-step level on the final side of the pit; in fig. 2 - formation of niches; in fig. 3 - dumping of rock mass in a niche, its planning and the formation of assembly and transport communication; in fig. 4 - construction of a transport gallery; in fig. 5 - operation of temporary embankments; in fig. 6 - transport galleries to the steep half-trench on the final rocky board of the quarry.

The method includes the following operations: the formation on the final rocky board 1 of the pit of the stepped half-trench 2; the formation from the working side 3 of the pit to the stepped half-trench 2 of the blasted rock mass of the corresponding overlying horizons along the ledges of the final rocky board 1 of the quarry of temporary embankments 4, leaving at each horizon between the steps of the half-trench 2 and mounds 4 unfilled niches 5; the operation by the excavator of 6 steps of the half-trench 2 and the dumping of rock mass 7 in the niche 5 of the corresponding underlying horizon; planning by the bulldozer 8 of rock mass 7 in niches 5 with the formation of assembly and transport communication 9 on it; construction with assembly and transport

communication 9 in the half-past 2 transport gallery 10; the operation of temporary embankments 4 together with the assembly and transport communication 9 simultaneously with the redemption of the working board 3 of the pit.

0 The method is as follows.

As the working / ix ledges on the final rocky zrta of the open-pit mine are formed, they form a stepped half trench 2; from the working side of the 3 quarry along the stepwise half-torn 5 neck 2, on the blasted rock mass of the corresponding overlying horizons, along the ledges of the final rock face 1 of the quarry, temporary mounds 4 are formed leaving at each horizon between

0 steps half of the trenches 2 and mounds 4 empty niches 5; with the excavator 6, the half-tier 2 stages work and pour the mass 7 into the niches 5 of the corresponding underlying horizon; Bulldoze 5, plan for mountain mass 7 in niches 5 with the formation of an assembly and transport communication 9 on it; from the assembly and transport communication 9 to the half-past 2, they are constructing a transport gallery 10; after the planning of the rock mass 7, poured into niche 5, and the completion of the construction of the gallery 10 temporary mounds 4 together with the montage transport trucks I communication 9

5 work simultaneously with the redemption of the working board 3 career.

The formation of niches by dumping temporary mounds from the blasted rock mass corresponding to the overlying

0 horizons avoids the extraction of additional overburden volume from the niche penetration in the ledges of the pit end wall. The operation of temporary embankments together with the assembly and transport communication after the planning of rock mass in a niche, and the completion of the construction of the gallery reduces the width of the base of the half trench on the final rock wall of the quarry by about the width of the assembly and transport communication about three times. In this case, under the half-trench with the transport gallery, there is practically no need for additional separation of the pit end and, accordingly, excavation of the additional overburden volume with the same mineral production volume. This reduces the development and dumping costs of the overburden. The reduced overburden volume and the cost of its development and dumping are significantly

exceed the volume of temporary mounds from the exploded rock mass and the costs of their creation and operation.

Claims (2)

Claim 1. Method for carrying out a steep trench, including defining the trench contour on the final side of the quarry, forming niches on each horizon, triggering rocks in the trench contours in the niches, planning the embankments to match the profile of the trench, forming transport links, characterized in that in order to reduce the volume of rocks produced during the construction of the trench five by reducing its base by eliminating the strip from the base for installation and transport operations while reducing mineral losses under the trench, pouring mounds of rocks on each horizon is poured, the said embankments adjoin the trench contour, niches are formed in these mounds. These embankments from them are the formation of transport 2. The method according to claim 1, characterized in that, in order to reduce the loss of minerals under the trench, after the formation of transport communications, a rock mass is activated. 7 / 2 Fig. / g i -J ate -co with N5 about / U 2 9 if FIG. five 1 Yu 2 / Phage. 6 M $ SCHSH UN Y1 H /