METHOD OF MINING THIN AND MEDIUM-THICK SEAMS OF MINERAL RESOURCE OUT OF PROTECTIVE PILLARS UNDER WATER OBJECTS

摘要

Usage: in underground strata to reduce the loss of minerals in safety pillars and ensure safe operation at working reservoir under water objects. SUMMARY OF THE INVENTION: Before treatment works preparatory workings of razuprochn dissolved rock formation over a range from three times to ten times with a removable reservoir capacity, counting from the last roof.