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ANDERNY CHEVILL N MINES
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ANDERNY CHEVILL N MINES
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Publication date
Application filed by ANDERNY CHEVILL N MINESfiledCriticalANDERNY CHEVILL N MINES
Priority to FR7228008ApriorityCriticalpatent/FR2194878B1/fr
Publication of FR2194878A1publicationCriticalpatent/FR2194878A1/fr
Application grantedgrantedCritical
Publication of FR2194878B1publicationCriticalpatent/FR2194878B1/fr
E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
E21C35/06—Equipment for positioning the whole machine in relation to its sub-structure
E—FIXED CONSTRUCTIONS
E21—EARTH OR ROCK DRILLING; MINING
E21C—MINING OR QUARRYING
E21C37/00—Other methods or devices for dislodging with or without loading
E21C37/02—Other methods or devices for dislodging with or without loading by wedges
E—FIXED CONSTRUCTIONS
E21—EARTH OR ROCK DRILLING; MINING
E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
E21D9/01—Methods or apparatus for enlarging or restoring the cross-section of tunnels, e.g. by restoring the floor to its original level