METHOD FOR DEVELOPMENT OF A THICK FLAT SEAM WITH RELEASE OF ROOF COAL Russian patent published in 2021 - IPC E21C41/18 E21C35/22 E21D23/00 

FIELD: mining.

SUBSTANCE: invention relates to mining and namely to mechanized extraction of coal from flat seams. The invention can be used in the development of a seam the thickness of which is greater than the maximum height of the powered support sections. The method of developing a thick shallow seam with the release of coal of the under-roofing strata includes breaking and loading coal by a combine harvester in the undercutting layer near the seam soil, maintaining the ceiling in the working space of the undercutting layer with powered support sections, releasing and loading the broken coal with dust suppression by irrigation during its movement during the release through the sections mechanized support. A destructive effect is exerted on the array of the roofing layer. The release of coal is carried out on a conveyor installed in the working space of the undercut layer. Irrigation through the support sections is carried out with rigid fan-shaped high-pressure sprayers installed on the lower edge of a rotating shutter that closes the outlet window made in the fence of the support section. Dust suppression in the working zone of the shearer when loading the chipped coal is carried out by creating a water-air curtain that covers the area of ​​the transverse space of the working face.

EFFECT: invention improves safety of cleaning operations when developing thick flat seams.

1 cl, 1 dwg