Method for forming deep-hole charge in encroached well

Abstract

Method for forming deep-hole charge in encroached well involves drilling well, placing initiators and explosive material inside it, and subsequently filling well cavity free of explosive material with backfill. First, main charge sleeve is formed from air-permeable polymer material, the diameter of which is not less than the well diameter, and the length of which exceeds the calculated well depth, wherein end of sleeve is sealed, and longitudinal seam is made in sleeve to form two adjacent chambers, one of which is the main chamber and the other is the auxiliary chamber, wherein the diameter of the auxiliary chamber does not exceed that of the main chamber, then initiation devices are placed in well, weight is attached to sleeve, and sleeve is lowered into well until weight reaches well bottom, after which emulsion explosive is fed into the main sleeve and water is displaced from well; once explosive reaches the calculated level, it is fed into the auxiliary container to the calculated level while simultaneously displacing the corresponding volume of water from well, after which charging sleeve, free of explosive, is moved into well as insulating liner onto which backfill is fed, which fills the well void free of explosive up to the surface level of block.