METHOD FOR DEVELOPING COAL WITH BENCHING AND BACKFILLING IN ADJACENT STOPE DRIFTS OF WANGEVIRY TYPE Russian patent published in 2017 - IPC E21C41/16 E21C41/18 E21F15/00 

FIELD: mining engineering.

SUBSTANCE: bench method for coal development with backfilling the adjacent stope drifts of wangeviry type. The main transport drift and adjacent stope drifts are arranged in accordance with the wangeviry method, selecting locations for a plurality of adjacent stope drifts at multiple development stages and perform benching according to the division into multiple development stages, and the coal pillars are not reserved between the adjacent stope drifts. The main transport drift is the main transport route, and the adjacent stope drifts are the drifts of mining coal. The extraction in all adjacent stope drifts is carried out consecutively with the benching method according to the design development sequence, as well as consecutive and in time backfilling is performed. The coal deposits in which excavation is not carried out or the backfilled adjacent stope drifts are used as supports for bearing back from both sides of the adjacent stope drifts. In adjacent stope drifts consecutive excavation is performed in several development stages and in the result the development is performed without coal pillars.

EFFECT: method allows to perform effective control of cracks, caused by the development of upper layers and ground surface sagging, providing safety and efficiency of stope drift with coal squeezed under buildings, railways and water bodies, and effective control of ground surface sagging.

2 cl, 5 dwg