METHOD OF PRESERVATION OF MINE WORKING Russian patent published in 1998 - IPC

Abstract RU 2101501 C1

FIELD: mining industry; applicable in underground mining of gently dipping coal seams for repeated use of workings in pillarless mining of coal. SUBSTANCE: the offered method includes driving of workings on boundary with worked-out space, erection of breaker row, roof bolting for support of working roof before stoping, installation of temporary support and replacement with yielding permanent arc-wise support consisting of segments. After erection of permanent support, roof bolting is removed, but one-two anchors are left at pillar. EFFECT: higher efficiency. 4 dwg

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RU 2 101 501 C1

Authors

Pirjazev Ju.M.

Petrova T.V.

Dates

1998-01-10Published

1996-06-06Filed