发明名称 |
Resin reinforced expansion anchor system |
摘要 |
A resin reinforced expansion anchor system for a mine roof support bolt or the like utilizes a specially configured, thin-walled expansion shell together with a thin-walled, dual-taper plug for expanding the shell. The shell and the plug cooperate to implement a particularly desirable type of mechanical expansion anchoring action while simultaneously providing a symmetrical array of resin flow passages at circumferentially spaced locations about the anchor assembly to permit proper distribution and flow of a quick setting resin mix. The system of the invention enables a relatively large diameter rock bolt or threaded bar to be securely anchored in a blind drilled hole that is of relatively small diameter, with the anchoring action of a mechanical expansion anchor assembly being desirably augumented by the anchoring action of a concurrently established resin bond. The system of the present invention has particular utility in providing a means for effecting combined mechanical expansion anchoring and resin bond anchoring of a relatively large diameter threaded member such as a 7/8'' rock bolt that is installed in a relatively small diameter hole such as a 13/8'' blind drilled hole that is formed in a mine roof or the like.
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申请公布号 |
US4764055(A) |
申请公布日期 |
1988.08.16 |
申请号 |
US19870102795 |
申请日期 |
1987.09.23 |
申请人 |
BIRMINGHAM BOLT COMPANY, INC. |
发明人 |
CLARK, CARL A.;WRIGHT, RAYMOND L. |
分类号 |
E21D20/02;E21D21/00;(IPC1-7):E21D20/02 |
主分类号 |
E21D20/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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