SU907252A1 - Method of working coal beds - Google Patents

Description

(54) METHOD FOR DEVELOPING COAL STRAYS

The invention relates to the mining industry and can be used in the development of coal seams with a thickness of 1-5.5 m and with a dip angle of more than 6 °.

There is a method of developing steep coal seams, including the conduct of development workings and mining of the reservoir stripes in the fall with the use of downhole jetting units 1 ..

There is also known a method for developing coal seams, which includes conducting district drifts, cutting strips for reservoir uprising by conducting for each strip paired excavation and coal-mine workings and working off the rear pillar between the latter and strips of the reservoir by one-sided cleaning penetrations, leaving intersecting coal pillars and hydrofluoric strips inclined toward the coal-outlet making shavings from excavation making 2.

However, these methods are characterized by a significant volume of pulp output to excavation production, unsatisfactory conditions for airing the latter, as well as the possibility of breakthroughs of collapsed rocks into the cleaning space. The purpose of the invention is to eliminate these disadvantages.

5 The goal is achieved by the fact that before each regular chip cutting in the strip in the rear sight between the excavation and coal mine workings from the excavation workout, the side wall of the last side of the array does not work to the coal mine, in the process of performing the paired excavation and coal mined workings are connected by joining them with a distance between the latter equal to

15 the width of the chip, and before working off the next strip along the side wall of the excavation furnace from the side of the coal adjacent the unworked strip place the disconnector.

FIG. 1 shows the general scheme

 reservoir mining; in fig. 2 is a diagram of chip cutting in the entry.

Claims (2)

In preparing the site, accumulating 1 and parallel 2 pins are conducted with a slope of at least 0.05. As the ventilation drift 3, an accumulation drift of the previously used substage is used. From the accumulating gauge 1, excavation workings 4 are conducted, and from parallel drift 2, pulpospuschnye excavations 5 are paired with these excavations 5. These excavations also cut up rising excavation strips 6. Each such strip is contoured by excavation excavations 4 and includes coal 7 between excavation production 4 and pulpuspuskuy production 5, the main part of the 8 strip, located on the side of the adjacent waste strip, and both of these rising workings. Before working each strip along the side wall of the excavation excavation 4 from the side of the coal mass adjacent the unworked strip, the disconnector 9 is placed. The stripping of each strip is performed by the formation of one-sided caps 10 on the reservoir 10. The disconnector 9, for example, in the form of grid, prevents breakthrough rocks waste strip 11 into the cleaning space. In order to improve the conditions for airing, the tight workings of all the strips communicate with each other by ventilation slugs 12. Each cleaning stopper 10 is extracted into the downstream section of the narrow narrow chips 13 from the excavation workings 4 by the jetting unit 14, into which high-pressure water is fed through a conduit 15. chips 13 begin with carrying out a development of 16 liters of the rear pillar 7. Production 16 is carried out with a slope of its side wall 17 to the coal discharge construction 5. In order to accelerate and facilitate the penetration of production 16 in the rear sight 7 when carrying out and the workings 4 and 5 they are knocked down with the knocks 18, the distance between which is assumed to be equal to the width of the chips 13. The clearing stoppers 10 can be processed by a hydraulic separation of several chips. interconnecting pillars 19, supporting the direct shelter of the reservoir and playing the role of support for the dormitory 9. 9. Ventilation drift 3 is repaid as mining proceeds, and pillar 20 is removed by bushing 21 of hydromonite; ) m 22. At the same time, they can work out several excavation strips with the necessary advance. The proposed method will reduce the volume of pulp output into excavation production, improve the conditions for airing the pulp, and also eliminate the breakthroughs of collapsed rocks into the cleaning space. Claim 1. Method of coal seam development, which includes conducting local patches, cutting strips for reservoir uprising by conducting for each strip of paired excavation and coal-bearing openings and working off the pillars between the latter and the stripe of reservoir incidence with one-sided cleaning inlets, leaving intersecting coal pillars and with hydrotreatment the strips are inclined in the direction of the coal production by chips from excavation making, in that. that, in order to reduce the output of the pulp into excavation production and to improve the conditions for airing the latter, before each regular chip in the strip in the pillar between the excavation and coal mines from the excavation excavation, the lateral wall of the latter from the side of the rear panel to the coal mine is mined working out. 2. A method according to claim 1, characterized in that in the course of carrying out the paired excavation and coal-mining workings, they are connected by beacons with a distance between the latter equal to the width of the chip. 3. The method according to claim 1, wherein that, in order to eliminate breakthroughs of collapsed rocks into the clearing space, before working out the next strip along the side wall of the excavation furnace, an uncoupler is placed on the side of the coal of the adjacent unworked strip, Sources of information taken into account during the examination 1.Luk nchenko Ye. S. and others Deserted coal extraction from wells with AGS jetting unit. - “Coal mining technology by underground method, 1975, No. 4, p. 23-24. 2. Authors certificate of the USSR. No. 690183, cl. E 21 C 41/04, 1978 (prototype).