The technology of layer-by-layer milling of the rock mass with surface miners,
carries out mining of rocks without carrying out a complex of drilling and blasting
operations, therefore, it finds more and more implementations in open pit mining. The
development of rock and semi-rock rocks with a mechanical method of their softening
is essentially effective when using high-performance surface miners.
Mining enterprises need new solutions for the introduction of an improved
traditional technology that:
will allow to review the feasibility of the established final depth of mining of iron
ore deposits;
improve technical and economic performance of iron ore open pits;
reduce the cost of production of 1 ton of ore;
reduce the harmful impact of its activities on the environment;
increase the safety of open pit mining.
Increasing the depth of an open pit development complicates and increases the
cost of mining operations, as a result of which it is economically feasible to switch to
non-blasting development of the rock massif by surface miners.
A lot of research has been done in the field of technology of developing rocks of
considerable strength with a mechanical method of preparing them for excavation.
Among those that are progressive non-blasting technology of development of rock and
semi-rock rocks is the most effective when using high-performance milling combines.
The essence of the work, which is to perform the grinding, removal and load of rocks
in a vehicle in one cycle.
The following mining equipment is used to implement the non-blasting
development of rocks: baking powder on the basis of heavy and super-heavy
bulldozers, impressive sizes of single-bucket hydraulic excavators, hydraulic hammers,
milling type mining combines, switch type combine harvesters [4, 5].
The idea of the work is the improvement of the technological scheme of the work
of highly productive surface miners and the justification of their joint work with
existing mining equipment. The efficiency of using the non-blasting technology of
layer-by-layer milling is increased due to obtaining successful adaptation of the mining
harvesters to the existing technology of mining.
The analysis of scientific works in this direction has shown that there is a need to
modernize the excavation and loading operations using milling type mining machines,
taking into account the factors influencing their work efficiency and expediency of use
in deep pits.
The range of application of mining harvesters for mining the rock massif expands
due to the lack of execution of a massive explosion. So, as every year there is a
tendency to tougher tightening of requirements and measures for the implementation
of blasting operations [6].
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