DEVICE FOR MEASUREMENT OF BLAST-HOLES DEFORMATION Russian patent published in 2009 - IPC E21C39/00 G01B5/30 

FIELD: mining.

SUBSTANCE: invention refers to the field of mining and may be used for continuous measurement of deformation of walls of blast-holes or boreholes in full-circle. Device for measurement of blast-holes deformation contains body structure, lighting, dim scatterer, transparent plate, spring stops. At that device is designed in the form of split encapsulant consisting of two parts. In its front part - heads of encapsulant, inside of body structure, full-circle, at equal distance from centre in equivalent sectors there are master balls arranged attached to cores moving freely in body structure. At that cores are attached to one end of retaining spring located from outer part of encapsulant front head rigidly fixed to body structure of encapsulant head. From side of blast-hole collar master balls are separated by transparent plate from rings for pulling-out of device. At head of encapsulant contains spring stops and power supply source controlled by electronic switch.

EFFECT: obtaining of most complete and exact data concerning displacement of walls of blast-holes or boreholes not removing tool during cut of web by combine.

4 dwg