SU711291A1 - Method of working thick gently sloping coal beds - Google Patents

Description

one

The invention relates to the mining industry and can be used in the development of thick flat coal seams, mainly under protected objects.

There is a known method of developing powerful flat coal seams under protected objects, including plastics, leaving the whole coal 1.

However, this method is characterized by significant losses, coal.

There is also known a method for developing thick, flat coal seams by three inclined layers, including carrying out preparatory workings for each of the layers up to. Begin working on the last and the seizure layers {2.

The aim of the invention is to increase the efficiency and safety of the clean-up operations under protected objects.

This is achieved by firstly removing the upper layer with thin gaps in the sequence from the roof to the soil of the upper layer, then immediately working out the middle layer at full capacity with the roof collapsing and feeding into the collapsed

rocks from the bottom of the middle layer of hardening mixture, after which thin slits work the lower layer in sequence from the soil of the reservoir to the top of the lower layer, and the workings for the middle and lower layers are formed by dredging the workings of the upper and middle layers, respectively, and the layers displacement of the roof before clearing the bottom of each subsequent in-sequence excavation layer.

FIG. 1 shows the scheme of mining the upper layer; in fig. 2 - the same, the middle layer; in fig. 3 - the same, the bottom layer.

The method is as follows. A powerful flat coal seam is worked out by three inclined layers with carrying out workings for each of the layers before the development of the latter. First of all, with the help of a thin-slit excavation unit 5, the upper layer 1 is thin gaps 2 in the sequence from the top of the layer to the soil of the upper layer. After the displacement of the roof rocks is completed, the middle layer 3 is dredged.

Claims (2)

0 immediately at full power with the feed to the collapsed rocks from the bottom of the middle turmeric mixture. After the middle eels are removed and the roof rocks are displaced, the lower layer 4 is worked by thin slits 5 in a sequence from the soil of the formation to the top of the lower layer. The excavations for the middle and lower layers are formed by deepening the openings of the upper and middle layers, respectively. In the subsequent mining of other excavation, pillars of the operation, repeat. Formula of the invention. A method of developing thick, flat coal seams with three inclined layers, including carrying out preparatory workings for each of the layers before starting the mining and excavation of the layers. I differ by the fact that, in order to increase the efficiency and safety of cleaning operations under protected objects, first of all, the upper layer is dredged with thin gaps in the sequence from the roof to the upper layer soil, then the full the layer with the collapse of the roof and the flow into the collapsed rocks from the bottom of the middle layer of hardening mixture, after which the lower layer is worked with thin slits in the sequence from the soil of the reservoir to the top of the lower layer, and the development for the middle and lower second layers are formed by recesses of the upper and middle layers of the workings and the layers fulfill, respectively, after completion of the displacement of the roof before production face of each subsequent layer sequence recess. Sources of information taken into account during the examination 1.Gapanovich L.N., et al. “Generalization of domestic and foreign experience in the development of thick flat seams. M., Gosgortekhizdat, 1959, p. 69 2. Nikitin V.D. et al. Development of Shallow and Inclined Seams, M., Nedra, 1976, p. 92-98 (prototype). Figg 7f 7W 7MyWi. 5 If 2J ilillii