Then the mining combine 1 develops the next layer of rocks in successive parallel
successive passages. At the same time, he, with his system of conveyors, performs a
direct load of the rocks he has removed from them into a dump truck 2, which transports
the loaded breed by combine 1 to its destination. The surface harvester 1 carries out the
milling of the rocks in successive stripes, parallel to the upper crest of the ledge 4, not
crossing the prism boundaries of a possible breakdown of the ledge. In accordance with
the above-mentioned technological scheme of conducting the development of the
ledge, the principle of the sequence of layer milling of the rocks of the working
platform to the full working out of the ledge at its full height is repeated. Moreover,
according to the presented technological scheme, in a coordinated operation, mill
combiners perform a simultaneous layered exploration of the rock mass independently
of each other.
Figure. 3. The section of the B-B technological scheme depicted in Fig. 1,
on which is practicing the working of the prisms of the possible milling
with milling combine (6)
Source: developed by the author
The analysis of the existing technological schemes for the development of the
rock mass is made thanks to the processing of the relevant statistical data, based on the
experience of conducting non-blasting mining of mineral deposits by milling
combines, mining companies. In order to determine their effectiveness based on the
surface mining of iron ore deposits. Also, a theoretical analysis of the practical
possibility of destruction of rocks of considerable strength, depending on the
characteristics of the rocks, namely the physic-mechanical properties.
On (Fig. 4) is a diagram of a sequence of layered working out of the ledge, which
indicates the order of working out rocks in accordance with the serial number. That is,
at first, there is an extraction of a layer of rocks 1, after which the removal of layer of
rocks 2 is performed.
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