NB/T 51020-2014Specification of powered support used in coal mining by solid backfilling (English PDF)

NB/T 51020-2014 is the English-translated version of 煤矿用固体充填液压支架技术条件.

NB/T 51020-2014 is a recommended energy industry standard of China written for the powered, or hydraulic, roof support used where a coal face is worked with solid backfilling.

It opens with terms and definitions, then describes the structural types of such support and states the requirements it must meet. Test methods, inspection rules and the provisions for marking, packaging, transport and storage follow.

The document is meant for fully mechanised coal mining faces that combine winning of the seam with solid filling. It cites the powered support standards GB 25974.1-2010, GB 25974.2 and GB 25974.3, with MT/T 98 and MT/T 986, and with GB/T 13306. Issued on 15 October 2014, it has applied since 1 March 2015.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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