SU563497A1 - Methods of working-out thick gently sloping coal veine - Google Patents

Description

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The invention relates to the mining industry and can be used in the development of powerful flat coal seams.

There is a known method for developing flat shallow coal seams in two downward sloping layers in order to carry out preparatory workings in the upper and lower layers, leaving the coal ends between the excavation fields 1.

However, this method is characterized by significant loss of coal, a large amount of development workings and fire hazard (1).

There is also known a method of developing thick flat seams with two inclined layers with advanced development of the lower layer by the upper one, which includes carrying out preparatory workings only in the lower layer, one for each excavation field 2.

However, this method is characterized by a relatively low concentration of mining.

The purpose of the invention is to increase the concentration of mining.

For this, the mining operations are conducted simultaneously in two adjacent excavation fields with the advance of the clearing bottom layer of one excavation floor by the clearing bottom of the upper layer of the adjacent excavating floor, and the preparatory development used to develop these excavation fields is simultaneously used as a conveyor belt for the clearing bottom bottom layer of one the floor of the 10th floor and as a vent for the clearing downhole of the upper layer of the adjacent excavation floor, and between the spent upper layer of one excavation floor and the The top layer of the adjacent excavation floor is left of the barrier pillar located above the above-mentioned excavation.

The drawing shows the scheme of cleaning works.

The coal seam is worked by two inclined layers in a descending order with preparatory workings only in the lower layer but one for each excavation field. The reservoir development is carried out simultaneously in two adjacent excavation fields, with the refining bottom of the lower layer 1 of one excavating floor diving with the cleaning bottom of the upper layer 2 of the adjacent excavating floor. Preparatory workout 3, which is used for working out these excavation fields, is simultaneously used as a conveyor belt for the cleansing slab of the lower layer of one excavation nol and as a vent for the clearing slab of the upper layer of the adjacent excavation field by installing a movable jumper between the cleansing holes of the lower and upper layers of the adjacent excavation fields .

As the mining between the used top layer of the excavation floor and the top layer of the adjacent excavation floor is worked out, the barrier pillar 4 is left, which prevents the cleaning face of the upper layer of the adjacent excavation floor from breaking through the broken rock.

Claims (1)

Invention Formula The method of developing thick flat coal seams with two inclined layers with the upper layer advancing the upper layer, which includes carrying out preparatory workings only in the lower layer one for each excavation field, which also means that, in order to increase the concentration of mining, the seams are mined in two adjacent excavation fields with the advancement of the cleaning bottom of the lower layer of one excavation floor, the upper face of the adjacent excavation floor, the preparatory development serving for These mining fields are simultaneously used as a conveyor for the cleaning bottom of one excavation floor and as a ventilation for the cleaning hole of the upper layer of the adjacent excavation field, and between the developed upper layer of one excavation floor and the upper layer of the adjacent excavation floor located above the above workings.