发明名称 |
Method and apparatus in tunneling |
摘要 |
PCT No. PCT/SE79/00223 Sec. 371 Date Jul. 3, 1980 Sec. 102(e) Date Jun. 23, 1980 PCT Filed Nov. 1, 1979 PCT Pub. No. WO80/01003 PCT Pub. Date May 15, 1980.Disclosed is a method for marking out drill holes in accordance with a predetermined drill hole pattern. A direction reference beam (c) is projected in a direction defining the direction of the tunnel and part of a beam (e) is deflected from the reference beam, the part of the beam is passed to a beam derivating means (d2) by means of which the part beam is directed in accordance with a predetermined drill hole pattern onto the rock surface (4) to present thereon images of the part beam at locations of intended drill holes. Correspondingly, a device for executing said method comprises means (d1) for deflecting at least part of a direction reference light beam (c) to form part of a beam (e), and means (d2) to direct the part of the beam onto locations of drilling holes for explosives in accordacne with a predetermined pattern.
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申请公布号 |
US4367021(A) |
申请公布日期 |
1983.01.04 |
申请号 |
US19800201485 |
申请日期 |
1980.07.03 |
申请人 |
NORDGREN, BO G.;AKERLIND, BO;BIEDERMANN, KLAUS |
发明人 |
NORDGREN, BO G.;AKERLIND, BO;BIEDERMANN, KLAUS |
分类号 |
E21D9/00;E21D9/14;F42D3/04;G01C7/06;G01C15/00;(IPC1-7):G01C7/06 |
主分类号 |
E21D9/00 |
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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