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申请日:1991-06-03;专利号:CN 91209554.7;授权日:1992-07-15证书号:80674;国际专利分类号(IPC):E21D 21/00摘要 本实用新型是利用一个具有自锁的圆锥金属楔撑起两个与锥楔相配的半圆柱形金属楔,将有缝金属管的头部撑固在岩孔的深处,以铆固岩层,阻止塌方,更替目前国内外所使用
Patent application number: CN91209554.7; Date of authorization: 1992-07-15 Certificate number: 80674; International Patent Classification (IPC): E21D 21/00 Abstract The utility model utilizes a self-locking Of the conical metal wedge prop up two cone-shaped wedge-shaped semi-cylindrical metal wedge, the head of the metal pipe will be stabbed in the depth of the rock hole to riveting the rock, to prevent landslides, replace the current use at home and abroad