METHOD FOR PROTECTING SOIL FROM POLLUTION WITH MINE WATER Russian patent published in 1999 - IPC

FIELD: mining industry. SUBSTANCE: according to method, bore-holes for loosening floor rock from longwall are drilled in part of surface of worked-out area which is not covered by bore-holes which are contouring stoping field of workings. In this case, angle of incline of bore-holes is equal to angle of declining or sliding-down of rock. Length of bore-holes corresponds to probable design volume of reservoir. Distance between bore-holes over longwall is equal to 1.8 radius of its action. Distance between rows of bore-holes across longwall is equal to daily advance of longwall. Provided in water draining ditch in lower haulage way is opening by means of which regulated is water flow discharged from worked-out space to water collecting sump of mine for further pumping out to surface. This prevents penetration of mine water through fissures to ground surface soil. EFFECT: higher efficiency. 3 dwg