SU715795A1 - Method of mining thick sloping coal beds - Google Patents

Description

(54) METHOD FOR DEVELOPING POWERFUL SHOPPED COAL STRAYS

one

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

There is a known method of developing powerful flat COBLES under protected objects; including a notch. coal cameras leaving the supporting pillars 1.

However, with this method, significant loss of coal.

There is also known a method for developing lean, flat coal seams in three inclined layers, including the development of workings for each of the layers before the development of the latter and the excavation of layers 2...

However, this method is not sufficiently effective and unsafe when conducting mining operations under protected objects during excavation of layers with an unstable roof.

The purpose of the invention is to increase the efficiency, safety and security of cleaning works under protected objects during excavation of layers with an unyielding roof.

This is achieved by the fact that from the workings of the upper layer it is produced

Roofing rocks by injecting the bastry-drawing solution into the wells drilled into the roof of the reservoir, then the upper layer is worked out with thin spots in the sequence from the top of the reservoir to the upper layer soil, followed by the development of the upper layer, the lower layer is worked out in thin sections of the soil of the reservoir. to the top of the lower layer, after which the array of the middle layer is strengthened by injecting a quick-setting solution in the borehole, drilled from the workings of the middle layer into masses The last coal and fine chalk in the sequence from the soil of the middle layer to its roof work the middle layer, and the middle layer is formed by digging the coal between the top and bottom layers, and the layers are respectively worked after the roof rocks are displaced before cleaning hole of each subsequent seizure

Claims (2)

FIG. 1, 2, and 3 are given, respectively, of the mining schemes of the upper, lower, and middle layers. The method is carried out as follows. A powerful flat coal seam with an unstable roof is worked by three inclined layers with carrying out preparatory workings for each of the layers before the development of the latter. Prior to the development of the upper layer 1 of its formation, a borehole 2 is pumped into the roof of the formation, into which a quick-setting solution is injected. Then, the thin-slotted excavation units carry out the development of the upper layer with thin slits 3 from the top of the formation to the soil of the upper layer. After the displacement of the roof rocks is completed, the lower layer 4 is dredged with thin gaps 5 from the formation soil to the bottom layer roof. After the displacement of the roof rocks of the reservoir is completed, the mass of the middle layer coal is controlled by injecting a quick setting solution into the wells 7 and the middle layer is worked out with thin slits 8 from the middle layer soil to its top. The excavations for the middle layer are formed by combining the workings 9 and 10 of the upper and lower layers during the excavation of the pillars 11. The proposed method will improve the efficiency of excavation of layers with an unstable roof under protected objects. The invention The method of developing thick flat coal seams with three inclined layers, including carrying out workings for each of the layers before starting the mining of the latter and excavating the layers, characterized in that in order to increase the efficiency and safety of cleaning works under protected objects when excavating layers with unstable roof , from the workings of the upper layer, the roof rocks are strengthened by injecting quick-setting mortar into the wells drilled into the roof of the reservoir, then the upper layer is worked thin slits in the sequence from the roof of the reservoir to the kidney of the upper layer, followed by the development of the upper layer, the lower layer is worked out with thin slits in the sequence from the soil of the reservoir to the roof of the lower layer, after which they strengthen the middle layer of the stratum by pumping a quick-setting solution in wells drilled from the workings of the middle layer into the coal mass of the latter, and thin slits in the sequence from the soil of the middle layer to its top work out the middle layer, and Independent user layer is formed by the recesses between the pillars of coal workings of the upper and lower layers, and the layers fulfill, respectively, after completion of the displacement of the roof rock before production face of each subsequent layer sequence recess. Sources of information taken into account in the examination of 1, Gapanovich LN, and others. Generalization of domestic and foreign experience in the development of powerful flat and inclined seams. M ,, Gosgortehizdat, 1959, s, 69. 2. Nikitin V.D. etc. Development of flat and inclined seams, M, Nedra, 1976, p. 92-08 (prototype). - Г7-г- / 7-777Г7. / Jti / W //// / f /, Fig.Z