Rock strength
The rock strength is the strength of natural rock, especially when subjected to pressure , but also includes tensile strength , shear strength , flexural strength and other stresses. The rock strength refers to drill samples, individual stones and healthy rock that has no dividing surfaces , fissures or other faults . The rock strength is not or little dependent on direction. It can be measured with test devices on test pieces in the laboratory and depends, among other things, on the type of rock and the degree of weathering .
A distinction must always be made between rock strength and rock strength . This refers to the rock with dividing surfaces, as it occurs on a larger scale in the mountains . The rock strength can also be strongly directional because the dividing surfaces, fissures or faults have preferred directions. The rock strength is therefore much smaller than the rock strength and varies in different directions. In general, it has only 5-15% of the rock strength.