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| DISCUSSION ON APPLICATION OF DRILLING TECHNOLOGY W ITH HOLEWALL PROTECTED BYMUD IN RAILWAY ENGINEERING GEOLOGICAL DRILLING |
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| F irst Su rv ey and D esign Inst itu te o fM OR |
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Abstract C om b ined w ith the cha racte rist ic o f ra ilw ay eng inee ring g eo log ica l dr illing , the feasibility o f app ly ing the dr illing techno log y w ith ho lew a ll pro tected by m ud, the av ailab ility o f the mud character, the conv en ience o f m ak ing m ud, as w el l as the technique leve l o f w o rke rs a ffected on this techno logy have been d iscu ssed in the pape r.
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Received: 28 July 1996
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1996, Vol. 13 
