FIELD: mining.
SUBSTANCE: claimed process comprises making the preparatory rock haulage ways and first workings composed by drilling and cross headings, relief courses and accesses thereto to make the units consisting of the first and second order chambers. Note here that drilling and crosscuts are made level with drawing drifts. Additionally, the story is created amidst the chamber heights by working of drilling crosscut. Relief headways are shaped to trenches with simultaneous ore breaking in chambers. Chambers working is made stepwise with application of drill-and-blast upward and downward walls. First, the first order chamber are worked and filled with fast-hardening mix. Then, second order chambers are worked and, also, filled with hardening mix. The next lower lift is worked with the displacement of chambers in horizontal through half the unit after appropriate hardness in upper lift chambers. Multi-lift stook is excavated by drilling the wells from the upper lift access crosscuts.
EFFECT: higher efficiency, lower costs, preservation of natural landscape.
3 dwg
