Despite significant shortcomings drilling and blasting, they are the primary means
of weakening the half rock and rock. This can be explained by absence of real
alternative method of grinding rock mass. In fact made the only effective way, which
meets the requirements of the traditional technology of conducting works.
The available information on the effective use of milling-type mining combines
in foreign pits indicates that high technical and economic indicators of the mining
enterprise have been achieved. Attention is focused on a detailed study and solving
problems of studying the physical and mechanical properties of rocks and working
conditions of mining equipment. Obviously, every year mining harvesters work out
semi-rock and rock rocks with a more significant strength indicator, that is, it is
achieved economically feasible mining of rocks with a coefficient of strength within
f = 15รท20 on the M.M Protodyakonov.
At present, there is the possibility of creating and introducing new technologies
with the use of modern high-performance mining equipment in the development of iron
ore deposits, creating significant competition for drilling and blasting. In turn, the use
of the combine method of loosening the rock massif improves the performance of
mining and transportation equipment. This is achieved by the fact that the proposed
technological scheme for the development of a ledge by the milling type mining
combines, which includes layer-by-layer mining of rocks with a direct load, the
softening of rocks in a motor vehicle by introducing additional operations to work off
the working platform of the entire width.
A flow chart is presented that takes into account all the theoretical and
experimental aspects of foreign research on the improvement and implementation of
non-blasting open pit mining technology with the intensification of its adaptation to the
traditional technology of rock mass development in iron ore pits.
A promising and relevant direction in improving the technology of opencast
mining is the use of progressive milling combines for the transition to a non-blasting
technology to develop semi-rock and rock rocks of the iron ore deposit.
Modern quarry miners meet the requirements of efficient operation of mining
enterprises, is a new technological level in the conduct of the surface development of
iron ore deposits. They successfully work in various mining pits. The main tasks of
solving the possibility of the effective use of the technology of layer-by-layer milling
of rocks on the use of mine harvesters and the rational parameters of his work are as
follows:
determining the operational performance of mining combines depending on the
structure and strength properties of the rocks of the massif;
quality and assessment of the completeness of mining in the desired mining,
geological and mining conditions of its work;
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