Field | Topics |
Location of the test | Location sample; depth (m); country; date. |
Dimensions of sample | Code, length; width; height (mm); volume (cm3) |
Rock material | Type of rock; RQD; UCS (MPa); Specific weight (g/cm3); E (GPa) Elastic modulus; ν – Poisson ratio. |
Main minerals and cracks | % clay; % feldspar; % calcite; % carbon; Existence of cracks |
Stresses before loading (MPa) | σv – vertical in situ stress; σh1 –horizontal in situ stress; σh2 – horizontal in situ stress in the face to be unloaded; I1 (first invariant of the stresses); I2 (second invariant of the stresses); I3 (third invariant of the stresses). |
Stresses during tests (MPa) | Rockburst maximum stress (σRB); maximum stress axis; loading rate in MPa/s; unloading rate for vertical stresses in MPa/s; unloading times. |
Characteristics of rockburst test | Type of burst position; duration of the test in minutes; time of burst delay (minutes); mainly shape of fragments. |
Critical depth (m) | Critical depth; rockburst risk index. |