FIELD: drilling technology in mining industry. SUBSTANCE: there are four objects of invention: one of them is method of drilling several underground bore-holes from one vertical or inclined bore-hole passing from ground surface. Second object of invention is construction of these bore-holes with providing bore-holes with casing pipes so as to ensure individual operation of these bore-holes. Third and fourth objects of invention relate to template which is positioned in main bore-hole, and effected with its help is drilling of several bore-holes from one bore-hole. Also provided is guiding device which ensures centering of drilling tool at start of drilling of each following bore-hole through template. EFFECT: higher efficiency. 63 cl, 32 dwg
Authors
Dates
1998-03-20—Published
1993-08-20—Filed