METHOD TO SAFEGUARD DEVELOPMENT OPENINGS Russian patent published in 2012 - IPC E21D19/04 

FIELD: mining.

SUBSTANCE: method includes arrangement of development openings following mining face displacement, installation of a wooden lining between sections of powered support, installation of breaker props, erection of a fence behind the breaker props on the area adjacent to the development opening, breakage of side rocks in the section of development openings and their arrangement in the mined space along the mining face interface and the development opening in the form of a rock wall. At the interface area of the mining face and the development opening between wooden stands there are two rows of pneumatic balloons, in one of which direction of a spacer force is aligned along the normal line to bedding, and in the other one - in the bedding plane. Compressed air is supplied for spacing one row of pneumatic balloons between side rocks (along the normal line to bedding), then rock is supplied along a pipeline into a strip between pneumatic balloons and filling mass by means of compressed air supply into pneumatic balloons of the other row and their spacing in direction of the bedding plane. Operations of pneumatic balloon rows loading and unloading, supply of rock into the strip between pneumatic balloons and filling mass, compaction of filling mass are repeated.

EFFECT: higher efficiency and safety of bed drift safeguarding by means of rock wall erection.

2 dwg