METHOD OF DETERMINATION OF CRACKS SPREADING HEIGHT IN BASIC ZONE OF WORKING Russian patent published in 1994 - IPC

Abstract RU 2010953 C1

FIELD: mining. SUBSTANCE: inert gas is brought into barren rock mass by forced destruction of a gas cylinder. The gas cylinders are placed in the soil of the working. After gas cylinders forced destruction the gas from the cylinders, using barren rock mass appeared cracks, goes up to daylight surface. Its appearance is fixed by test boreholes, made from the ground surface or from a working, located over the tested one. EFFECT: method facilitates accuracy of determination of upper border of cracks spreading zone. 4 cl, 1 dwg

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RU 2 010 953 C1

Authors

Khokhlov Ivan Vasil'Evich

Litvinenko Nikolaj Grigor'Evich

Dates

1994-04-15—Published

1991-12-18—Filed