METHOD TO SUPPORT HEADINGS WITH ANCHOR BOLTS Russian patent published in 2017 - IPC E21D21/00 

FIELD: mining.

SUBSTANCE: drilling of the hole is carried out according to the method. A metal anchor with bearing lock and support plate and tensioning element is installed. When supporting mine headings in permafrost conditions, from the heading surface a portion of space between the anchor and hole surface is filled with heat-conducting material with thermal conductivity factor of approximately equal to anchor material. The tension element and support plate are coated with a fire-retardant material, for example, biopyrene, which can change its thermal resistance when air temperature in the heading is increased.

EFFECT: increased bearing capacity of anchor support in emergency situations, for example, in case of underground fire in mine heading driven in dispersed frozen rock.

2 dwg