摘要：At the present time the problem to search for variants for the
development of steep thick coal seams is highly interest. Here there are, for
example, variants for managing the workings’ roof by caving or laying the
worked out space. The authors proposed a number of methods for it, which
are protected by patents. The permissible span of the roof exposure is
estimated as a function of the type of the immediate roof of the mine, its
thickness, bulk density and tensile strength, and the height of the underlevel
is also determined. The technical result is provided by the presence of
the protective inter-horizon strips and inter-sectional pillars, by the order of
working out the excavation site and by the value of the step of the binding
of the worked out space. The above solutions are acceptable for the
Prokopyevsk-Kiselevsk coal region in Kuzbass.
其他摘要：At the present time the problem to search for variants for the development of steep thick coal seams is highly interest. Here there are, for example, variants for managing the workings’ roof by caving or laying the worked out space. The authors proposed a number of methods for it, which are protected by patents. The permissible span of the roof exposure is estimated as a function of the type of the immediate roof of the mine, its thickness, bulk density and tensile strength, and the height of the underlevel is also determined. The technical result is provided by the presence of the protective inter-horizon strips and inter-sectional pillars, by the order of working out the excavation site and by the value of the step of the binding of the worked out space. The above solutions are acceptable for the Prokopyevsk-Kiselevsk coal region in Kuzbass.
