Abstract
An analysis of the impact of mining with caving on the surface shows that a type of rock mass
strata seems to be one of the critical factors affecting the process. Correlating the values of mining-induced
surface deformation with the rock mass structure and the state of its disturbance is of crucial
importance. Therefore, if other mining conditions are left unaffected, then those factors exert the
key influence on a course and distribution of subsidence and rock mass deformation. A proper description
of rock mass type and properties also seems rational for a proper determination of prediction
parameters, especially in the case of a multi-seam coal mining, and/or the exploitation carried out at
considerable depths. A general outcome of the study discussed in this paper is the development of the
methodology and model practices for determining the rock mass type and, as a result, for selecting the
optimal values of parameters for predicting the values of surface subsidence in relation to particular
geological and mining conditions. The study proves that the type of rock mass may be described by
such factors as the influence of overburden strata, the influence of Carboniferous layers, the disturbance
of rock mass and the depth of exploitation.
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