METHOD FOR CLEANING BAYS AND COMPLEX OF EQUIPMENT FOR ITS REALIZATION Russian patent published in 1995 - IPC

FIELD: mining. SUBSTANCE: method for cleaning bays includes hole drilling and casing with casing strings provided with ports, cementing of casing string-to-hole walls annulus, installation of production units on strings, supply of working agent to string inner space and pulp pumping to craft. Holes are drilled in rows parallel to fairway and spaces between hole rows and holes themselves in rows being equal. Casing string is landed so that its ports prove to be on the boundary of underlaying rocks. Bay is cleaned at the initial stage by working holes of neighboring rows adjacent to fairway line, withdrawal of freed metal scrap, and then, technogenic layer is covered with pulp precipitate. Installed at the outlet of bay on the surface of sedimentary rocks, square to fairway line, is device for formation of air bulb curtain. Complex of equipment for realization of the method includes craft and production unit. The latter consists of pipeline supplying pulp and compressed air disperser coaxially arranged in pipeline. Production unit has ballast vessels with regulated positive or negative buoyancy. Production unit is installed telescopically on casing string. Pipeline end has discharge elbow and counterweight. Production unit is arranged on casing string for turning round its longitudinal axis. Equipment complex has device for producing air bulb curtain in form of flexible high-pressure hoses with normally closed perforation holes. Hoses are installed parallel to one another and rigidly secured in circular sleeves articulated to each other by tie-rods. EFFECT: higher efficiency. 8 cl, 13 dwg