| 摘要 |
FIELD: mining, particularly methods of underground or surface mining. ^ SUBSTANCE: method involves drilling belt entry and air heading; cutting mounting chamber at extraction pillar boundary; installing mechanized complex in the mounting chamber and thawing permafrost roof rock by heat application; breaking roof rock in belt entry and air heading at distance equal to prospective initial roof caving pitch, from extraction pillar boundary along with at least 1.5 times entry and heading section increase; thawing roof rock with air heated by local heater; stacking cut rock in slashing having width determined from section of roof rock to be broken, seam thickness, rock loosening and slashing filling factors. ^ EFFECT: increased labor safety. ^ 2 dwg |
