FIELD: mining, particularly to develop flat-laying seams having incompetent rock roofs.
SUBSTANCE: method involves cutting mineral seam in chambers along with rock strips forming in the chambers and with safety mineral pillars leaving, wherein the rock strip is formed so that the rock strip remains behind chamber face and longitudinal axis thereof coincides with chamber axis; installing pneumatic cylinders on rock strip; laying timber supports on the pneumatic cylinders, wherein timber support height exceeds collapsed pneumatic cylinder height; removing pneumatic cylinders from rock strip after roof lowering in contact points between roof and timber supports. Minimal rock strip width exceeds pneumatic cylinder width and height thereof is determined from mathematical equation with taking into consideration seam thickness and initial pneumatic cylinder height after installation thereof.
EFFECT: increased output and reduced mineral mining losses due to increased chamber width.
2 dwg, 1 ex
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