FIELD: mining.
SUBSTANCE: invention concerns mining and can be used in preparing primary collapse-proof roof caving in permafrost environment. The method involves drifting of belt entries and airways, digging of installation chamber at extraction pillar border with further installation of a powered mining complex and face caving of minerals. A vibration set is installed on the surface above the mined-out space, with offset to the seam dip direction at the value of L defined by the formula: L=H·tgα, where: H is a distance from the surface to the centre of mined-out space, m, α is a seam dip angle, and along the complex a cutting-off support is constructed.
EFFECT: improved mining work safety and prevention of powered complex failure.
2 dwg
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