SU1008451A1 - Method for working thick coal seams in inclined and steeply sloping deposits - Google Patents

Abstract

METHOD FOR POWER DEVELOPMENT COAL SEAMS AND INCLINED steep drop comprising mounting refinement layer in overlying stratum. Grinding overlap flexible mounting on the soil layer and the subsequent testing of sequences of the coal strike the inclined undercut layers between the vent and the conveying horizons substage, differs. In order to increase the efficiency and safety of mining operations when excavating particularly thick formations, the thickness of coal in the ventilation and conveyor levels of the sub-floor is worked out with diagonal transversely inclined layers simultaneously with the development of inclined bottoming layers, which are carried out with advance hanging to the side, equal to the collapse of the interlayer sequence. 00 4 ;: SP

Description

The invention relates to the mining industry and can be used in the development of coal seams for the power of inclined and steep incidence coal seams. .

There is a method of developing thick coal seams inclined and steep, including a recess, an installation layer and a roof of the seam with erection of a flexible overlap and sequential recess of taltsr coal under flexible overlap by inclined undercut layers with the help of aggregates l.

The disadvantage of this method is a large amount of development workings.

There is also known a method for developing thick coal seams with an inclined and steep fall, which includes working out the assembly layer near a crawl layer, laying a flexible covering on the soil of the assembly layer and. the subsequent mining of coal along the strike by inclined sub-axial layers between the vent and conveying horizons of substage C21.

The disadvantage of the method is that at stable and moderately stable coals, the destruction of the subsurface strata occurs in large chunks, on reservoirs with a thickness of over 6-8 m, the coal thickens down onto the soil of the reservoir without destruction, which leads to difficulties in destroying and releasing the subsurface coal. thickness, reducing the safety of mining operations.

The purpose of the invention is to increase the efficiency and safety of mining operations during the extraction of particularly thick layers.

The goal is achieved by the fact that according to the method of developing thick coal seams of an inclined and steep fall, including working out the installation layer at the roof of the reservoir, laying a flexible overlay on the soil of the installation layer and the subsequent development of the coal along the direction of the inclined hemline layers between the ventilation and conveyor horizons of the sub-stage, the coal on the ventilation and conveyor horizons of the substage is worked out with diagonal transversely inclined layers simultaneously with the development of oblique cutting layers, which is carried out with a lead-bismuth which side equal to collapse step interlayer thickness.

Figure 1 presents a diagram of the development of substage-along the strike of the reservoir in figure 2 - section aa in figure 1; on fig.Z - section bb in figure 1 on figure 4 - section bb In figure 1.

The method is as follows. When developing a powerful or sloping formation, first of all the assembly

Layer at the roof of a layer with laying on its soil-flexible overlap 1. The installation layer is removed, for example, with a thin-slit unit, which allows the use of ventilation 2 5 and conveyor 3 drifts for dredging the coal under the overlap.

After the excavation of the installation layer of the first sub-stage, the preparation for the clearing excavation of the reservoir under the flexible

0 overlap, which consists in conducting a ventilation 4 near the soil of the reservoir and diagonal mounting chambers on the ventilation and conveyor horizons of the substage

5 boundaries of the scooping floor. A diagonal mounting chamber on the ventilation horizon connects the drifts 2 and 4, and on the conveyor horizon they connect the drift 3 to the soil of the formation. In the diagonal chambers mounted mechanized complexes 5 and 6.

Diagonal chambers ventilation. The main and conveyor horizons of the substage are connected by inclined split openings in which coal saws 7.8 are placed and on the soil of the formation the cutting unit 9 with a plane 10 ..

After this, a cleaning excavation of the formation under flexible overlap is started.

0 Diagonal face 11 is developed by complex 5. Coal from the bottom is transported to the drift 4, in which the conveyor is installed. The movement of the coal along the bottom is carried out by a conveyor or by means of vibro-tapes. The complex 5 is equipped with coal saw 7, 8 drives and a plow 10 drive. Cutting unit 9 is kinematically connected with the mechanized complex 5.

Diagonal face 12 is developed by a complex 6. The coal from the bottom is transported to the drift 3, in which the conveyor is installed. Complex b is supplied

5 with two conveyors, one of which is located at the bottom, and the second at the rear fence for transporting the coal produced. Cutting unit 9 kinematically connected

rt with a mechanized complex 6 ..

Diagonal faces 11 and 12 are oriented at an angle of 30-45 ° to the axis of sublevel drifts and have a slope to the horizon of 12-16 °. Slope to the horizon

5 ensures the normal operation of the vibroent, which can be equipped with complexes 5 ib. The use of vibrolent is dictated by the need to crush oversize,

0 arriving in the –diagonal face from inclined layers. In addition, the diagonal bottom hole spacing allows the use of conveyor curtain 3 for working two adjacent ones.

5 sublevels.

The coal cleaning in inclined undercut layers 13-15 is carried out using COB saws 7, 8 and undercut unit 9 with a ply 10. The inclined undercut layers of the hangings are worked out, the sides of which are carried out with an advance equal to the pitch of the interlayer distance. Repulsed coal in the undercut inclined layers from the interlayer stratum flows by gravity to the exhaust conveyor of complex 6 and further to the conveyor a raft a 3. Flexible overlap as the coal is released is lowered onto the soil layer.

Fresh air for venting the substage enters along drift 3 into diagonal face 12 and further into the faces of inclined undercut layers 13-15 The outgoing jet enters diagonal face 11 and is removed along drifts 2 and 4. After the excavation of the first substage, proceed to the clearing notch of the second substage, etc.

The proposed method will allow the effective use of active forces.

pressure of the collapsed rocks to soften and collapse the cantilevers of the coal to ensure the lowering of the flexible overlap simultaneously with the release of the coal and to reduce the stresses in the flexible overlap.

Reducing the thickness of the installation layer allows you to increase the speed of preparation, reduce the amount of work and maintain the workings, so as it is possible to retain the production of the installation layer at low layer thickness, for reuse when excavating coal under the overlap. Simultaneous excavation of the entire stratum under flexible overlap by diagonal faces, illuminated by mechanized complexes and undercut inclined layers, reduces the amount of preparatory workings, makes it possible to reject the use of blasting, i.e. improve work safety. In addition, the concentration and productivity of coal mining is improved.

/% A VXX yX ANX / X yXA V / l FIG. BUT

Claims (1)

METHOD COAL LAYERS TILT AND HIGH-DEVELOPMENT OF POWERFUL GO FALLING, including working off the installation layer at the top of the formation, laying flexible cover on the soil of the installation layer and subsequent mining of the coal thickness along the strike by inclined undercut layers between the ventilation and conveyor horizons of the sub-floor, characterized in that, in order to increase the efficiency and safety of mining operations the excavation of particularly powerful seams, the thickness of coal on the ventilation and conveyor 'horizons of the sub-floor is worked out by diagonal transverse-inclined layers simultaneously with the development of inclined and layers, which is carried out ahead of the hanging wall at a pitch collapse of the interlayer thickness. Vur.i