Pumpable rockbolt method

Patent · Tue Jan 06 00:00:00 EST 1976

OSTI ID:862438

Steinberg, Meyer ^[1]; Manowitz, Bernard ^[2]; Waide, Charles H ^[3]

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1. Huntington Station, NY
2. Brightwaters, NY
3. Center Moriches, NY

Method and apparatus for producing rockbolts in the roof of a subterranean cavity in which two components of an ambient temperature curable resin system are premixed and then inserted into a bore hole. The mixture is permitted to polymerize in situ and then the hardened material is cut off at the entrance to the hole leaving a hardened portion for insertion into the next hole as a precursor. In a preferred embodiment a flexible glass roving is employed to reinforce the material in the hole and a metal tube inserted to support the roving while it is fed into the hole and also to provide venting. The roving and tube is then cut off and left in the hole.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• DOE Contract Number: AT(30-1)-16
• Assignee: United States of America as represented by United States Energy (Washington, DC)
• Patent Number(s): US 3930639
• Application Number: 05/509,998
• OSTI ID: 862438
• Country of Publication: United States
• Language: English

Related Subjects

pumpable
rockbolt
method
apparatus
producing
rockbolts
roof
subterranean
cavity
components
ambient
temperature
curable
resin
premixed
inserted
bore
mixture
permitted
polymerize
situ
hardened
material
cut
entrance
leaving
portion
insertion
precursor
preferred
embodiment
flexible
glass
roving
employed
reinforce
metal
tube
support
fed
provide
venting
left
preferred embodiment
ambient temperature
metal tube
hardened material
/425/405/