Abstract
1. As a result of chemical treatment of clay mud by surfactant solutions and of compresor aeration of the mud in the hole itself, aerated liquids are formed during drilling with roller-bit drills. 2. The use of aerated liquids during drilling of blast holes by roller-bit drills in waterlogged argillaceous rocks makes drilling simpler (increasing the rate to 43.3 m/h) and ensures stability of the walls of the hole. 3. Little expenditure on materials is required to modify roller-bit drills so as to obtain aerated liquids.
Full Text
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