Relationships between annulus thickness and the integrity of resin-grouted roof bolts /

详细信息    Relationships between annulus thickness and the integrity of resin-grouted roof bolts /

• 出版日期：1989.
• 出版者：U.S. Dept. of the Interior, Bureau of Mines,
• 页数：13 p. :
• 出版地：Washington, D.C. :
• 第一责任说明：by Bryan F. Ulrich, William J. Wuest, Raymond M. Stateham.
• 尺寸：28 cm.
• 分类号：a720 ; a660

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02h0058893 20141229102851.0 s1989 dcuab fr |000|||eng | CNY200.00 NGL a720 ; a660 Ulrich, Bryan F. Relationships between annulus thickness and the integrity of resin-grouted roof bolts / by Bryan F. Ulrich, William J. Wuest, Raymond M. Stateham. Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1989. 13 p. : ill., maps ; 28 cm. Report of investigations (United States. Bureau of Mines) ; 9253 Mine roof bolts, Resin. ; Drilling and boring. ; Holes. aStateham, Raymond M. ; aWuest, William J. Report of investigations (United States. Bureau of Mines) ; 9253. aCN bNGL 010001 P 720.66 R29u v9253 ; rCNY200.00 ; h1 whx016