SU715797A1 - Method of mining thick sloping coal beds - Google Patents

Description

. (54) METHOD FOR DEVELOPING POWERFUL LAYOUS COAL STRAYS

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

There is a known method of developing powerful flat coal seams under protected objects, including the extraction of coal by chambers with the abandonment of supporting pillars 1.

However, this method loses a large amount of coal.

There is also known a method for developing MOtttHHX of flat coal seams with three inclined layers, including the carrying out of preparatory workings for each of the layers before the development of the latter and the excavation of wood 2.

However, the use of this method does not ensure the effective and safe development of layers under protected objects.

The purpose of the invention is to increase the efficiency and safety of the development of plastics under the protected object and ...

This is achieved by firstly excavating the upper layer with thin gaps from the top of the seam to

the upper layer of the soil, then using thin slits, work the lower layer from the soil of the reservoir to the top of the lower layer, after which the slot is dredged at the top of the middle layer and the plasticized fiber is formed into the developed space of the said slit. artificial roof thin creases

0 work the middle layer from the artificial roof to the soil of the middle C. LAYER, with the production of the middle layer is formed by combining adjacent workings of the upper and lower layers

5, the coal is interspersed between them, and the layers are respectively worked after the roof has moved, before the cleaning face of each subsequent layer extraction.

0

FIG. 1, 2, and 3 are given, respectively, of the mining schemes of the upper, lower, and middle layers.

The method is as follows. Powerful shallow coal seam

5 work out three inclined layers. With carrying out the preparatory workings for each layer before the development of the latter. First of all with the help of a thin-gap aggregate

Claims (2)

0 notches work the upper layer 1. thin slits 2 from the formation layer to the soil of the upper LAYER. Following the completion of the upper layer, after finishing, the pbbd of the roof 6 is finished and the lower layer 3 is thinned with slots 4 from the soil to the bottom of the lower section. Then, after the end of the sprung roofing rocks, the spruce 5 at the roof of the middle layer with the penetration into the working space is specified above the plasticized hardening mixture, after which the medium slit 7 is worked out in sequence from the artificial roof to the soil of the middle layer . The middle layers are formed by combining the adjacent workings of 8, 9 and Lower Elbe when excavating 10 coal pillars between yymi. In the development of subsequent excavation pillars, the operations are repeated. The proposed method will make it possible to effectively and safely work out powerful flat coal gotasty under protected objects. . The invention The method of developing thick flat coal seams in three inclined layers, including the carrying out of preparatory workings for each of the layers before the development of the latter and the excavation of layers, so that, with the aim of ffm /: : mff mf W FIGURE 1: EFFICIENCY AND SAFETY OF THE DEVELOPMENT OF THE STRUCTURES UNDER THE PROTECTED OBJECTS, first of all carry out the excavation of the upper layer with thin chalk, in sequence from the top of the reservoir to the upper layer of the soil, then with the thin slits work the bottom layer in sequence from the soil of the reservoir to the top of the lower layer, after which the gap is cut at the middle layer roof and the plasticized hardening mixture is fed into the developed gap of the specified gap and under the sewn up artificial roof The middle layer is placed in sequence from the artificial roof to the middle layer soil, and the middle layer is formed by combining the adjacent workings of the upper and lower layers when the pillars are dredged, the coal is between them, and the layers are worked out after the roof has been displaced. . Sources of information taken into account during the examination 1.Gapanovych L.N. and others. Generalization of domestic and foreign experience in the development of powerful flat and inclined seams. M., Gosgortekhizdat, 1959. with. 69 2. Nikitin V.D. and others. Development of flat and inclined seams. M., Nedra, 1976, p. 92-98 (prototype). i / Fig.}