FIELD: geomechanics, particularly to control rock stresses and deformations.
SUBSTANCE: device comprises template for slot drilling-out, spacing and supporting wedges arranged in extreme template orifices and transversal member with two orifices adapted to receive two removable mine survey plugs. Each mine survey plug is made as two split metal wedges. One metal wedge has polished socket formed in side part thereof and adapted to receive mercer clock gauge stem. Longitudinal row of convex segments is created in inner side of one metal wedge. Inner side of another metal wedge has spherical stop made as ball, spring and threaded plug.
EFFECT: increased operational reliability, decreased labor inputs and measuring accuracy.
3 dwg
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