METHOD OF SETTING OF CABLE ANCHOR Russian patent published in 1994 - IPC

FIELD: mining industry. SUBSTANCE: method relates to support of rock workings. First borehole 19 is drilled in rock mass to be grappled by anchors. Intensity of jointing of borehole 19 is found, borehole is divided over its length into sections with equal jointing. Two piston members 3 and 4 with cable 1 and tubes 10 and 11 are placed into borehole 19 uniaxially. Then borehole is shut with packer 5 with installation of tube 12 into it. Travel of piston members 3 and 4 to bottom of borehole and back towards entrance is accomplished thanks to successive feed of solidifying mixture through tube 10 and compressed air through tubes 11 and 12. Filling of borehole 19 with solidifying mixture, pulling of cable 1 and compaction of solidifying mixture is conducted in stages by sections. EFFECT: improved compaction of rock mass over cracks, wedging out of individual structural blocks, more complete filling of unevenness and cracks in walls of borehole with solidifying mixture, increased adhesion of cemented cable anchor to walls of borehole, enhanced degree of tension of anchored rocks, of their strength and resilient properties. 4 dwg