Friction tubing pipe e.g. for drilling into mountains and rocks, flexible and tubular with both ends closed and mouth of borehole has setting with drill bit leading into tubing inner body
DE10321175B3
Injection ground anchor, to stabilize walls in mining and tunneling, has an inner channel with at least one chamber to hold the mixed cement to be pressed out into the borehole
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Underground pipeline repair method has sealing material supplied to leakage point after application of packer
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Consolidation of geological formation in underground coal mining using a polyurethane-forming mixture of polyol and polyisocyanate components with an added fatty acid triglyceride without isocyanate-reactive groups
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Organomineralsystem
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Consolidation of a geological formation in an underground coal mine by introducing a reaction mixture which forms a polyurethane, uses polyol component containing polyether polyol with solid organic filler formed in situ, and plasticizer
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Anchoring device to be used in particular for brittle areas in mining or tunneling, assembled of permanently joined mantle and folded inner tube
