SU1411472A1 - Method of layer-wise mining of thick sloping coal seams - Google Patents

Abstract

The invention relates to the mining industry and is intended for a layered panel development of powerful flat coal seams (P). The purpose of the invention is to reduce coal losses, fire hazards and the costs of carrying out and guarding the installations. The tier is prepared by a central track bias (y) 1 at the roof P, conveyor Y 2 at the soil P, located one above the other, and flanking mounting U 3 and 4 at the roof and at the soil P. Size of Y 3 and 4 within the power P with offset The cushion sections of soil P in the direction of advancing clearing faces by 0.5–1.5 width of their cross section, creating a more stable form of the boundary pillar of the coal, eliminating the loss of the collapsed console of coal and reducing the fire hazard of the developed space. The coal layer at the roof P is treated with a clean bottom 5, formed after the last ventilation drift (III) 6, which is besselikovoj protection by installing the cut lining 8, then working out the underlying column cleaning face 11, following the movement of which 7 "JL / a (L 4a N9 AA /

Description

the vent 12 is formed by the excavating harvester 13 and its aimless protection is carried out by installing lining 14. The advance ahead of the slaughter 5 of the overlying column of the lower 11 of the column is taken equal to the sum of the lengths of the unloading zone from the cleaning work in the upper layer and the zone

rear bearing pressure. At the same time, the lower layer W 12 at the soil P is formed at a distance of 10 to 5.0 width of its cross section above or below the conveyor upper layer W 9 at the roof P in the unloaded zone. Coal in the bottom 5 and 11 is transported down the lava to Y 1 and 2, 4, silt.

The invention relates to the mining industry and is intended for a layered panel development of powerful flat coal seams.

The purpose of the invention is to reduce coal losses, fire hazards and the costs of carrying out and protecting workings.

FIG. 1 shows a diagram of a layer-by-layer development of a powerful hollow layer in two layers, in FIG. 2, section A-A in FIG. 1, in FIG. 3 a section B-B in FIG. 1, in FIG. 4 is a section bb In figure 1.

The method is defined as follows.

in the way

I

Tier prepare central

slopes (bremsberg) - track 1 at the roof of the reservoir and conveyor 2 at the soil of the reservoir, as well as flanking mounting slopes 3 and 4 at the roof and at the soil of the reservoir. In this case, the central slopes 1 and 2 are located one above the other, and. the width of the track slope t at the roof of the reservoir is 1.3-1.6 times greater than the width of the conveyor slope 2 near the soil of the reservoir, unloading conveyor slope 2 from the rock pressure. Mounting flanking slopes are located within the thickness of the reservoir with the displacement of the workings section on the soil of the reservoir towards the advancement of cleaning faces by 0.5–1.5 widths of their cross section relative to the mounting slopes at the roof of the reservoir, thus creating a more stable form of the boundary pillar of coal, eliminate losses of the collapsed console coal and reduce fire hazard all fotbannogo space.

A layer of coal at the roof of the seam is worked off by a cleaning face 5, while

five

five

0

five

0

The ventilation drift 6 is formed after the movement of the cleaning plant, by the excavation combine 7 and ISU, and its aimless protection is established by installing a cut-off lining 8 with a high bearing capacity — along the entire length of the excavation column, by crushing the roof behind the lava passage on this lining. After mining of the extraction pole, the ventilation drift 6 is used as i conveyor tunnel 9 when mining the surrounding extraction pole. As the clearing of the upper layer 5 moves up, the conveyor drift is extinguished, at the same time the support units of high bearing capacity are dismantled and collapse. Airing the cleaning face of the upper layer is direct flow-rising. A fresh stream of air 10 enters through the conveyor drift 9 into the clearing face 5, washes it and through the ventilation drift 6 is delivered to the flanking mounting slope 3 at the roof of the reservoir, and through it to the common initial jet. The coal layer at the soil layer is cleared by the clearing face of the lower layer 11, while the ventilation drift is formed following the movement of the clearing notch combine harvester 13 and making it aimless ochoana by installing lining 14 of high bearing capacity along the entire length of the collecting column near the soil of the reservoir collapsing on this lining the interlayer thickness of coal and collapsed rocks during the mining of coal at the roof of the seam.

After mining the coal extraction column near the soil of the reservoir, vent 12 is used as a conveyor drift 15 for mining the overlying mining column. As far as plowing

11 of the lower layer, the conveyor belt 15 is redeemed, at the same time dismantled

and give the unit support. Airing of a clearing face at. the soil of the reservoir is flow-rising. A fresh stream of air from the central conveyor slope 2 near the soil of the reservoir enters the conveyor drift 15 and along it into the clearing face 11, the wash of which is discharged through the ventilation drift

12th flanking mounting slope A on the soil of the formation, and along it to the general outgoing air stream.

20

25

thirty

The excavation poles are worked out in an upward order, while the excavation poles are worked out ahead of the upper face of the underlying column of the clearing bottom ahead of the lower layer of the underlying column by a distance equal to the sum of the lengths of the discharge zone (1) from the management of the clearing works the upper layer and the back pressure zone (Ij), which makes it possible to locate both the clean bottom 11 and the winding 12 and the conveyor 15 drift in the zone of steady pressure, i.e. to form the conditions for its development similar to the conditions of a separate reservoir of average thickness. The ventilation drift 12 of the lower layer near the soil of the reservoir is formed at a distance of 1.0-5.0 of the width of its cross section above or below the conveyor drift 9 of the upper layer at the roof of the platform in the unloaded zone. the bottom of the bottom layer of the reservoir coal is transported down the lava by conveyor drifts to the central conveyor slope,., from the top layer the coal is transferred to the conveyor drift near the soil v

15

35

40

20

25

thirty

.

11472

Claims (1)

through e-16, formed on the border of the protected pillar. Claims of the Invention — A method of layered development of thick flat coal seams, including carrying out transport and assembly slopes of the upper and lower layers, forming layered preparatory workings of the lower layer with displacement relative to the cross-section of the layered preparatory upper layers and protecting them, developing the overlying and lower lying 15 earthen poles with the advancement of the cleaning face of the upper layer of the cleaning face of the lower layer, the formation of a discharge zone from the maintenance of the cleaning work in the upper layer back pressure zone, characterized in that, in order to reduce coal losses, fire hazards and the costs of carrying out and protecting workings, transport slopes of the upper and lower layers are held one above the other, and the mounting slope of the lower layer is offset with respect to the installation slope the upper layer in the direction of advancement of the cleaning faces by 0.5–1.5 width of their cross section, the advancement by the cleaning face of the imposing column of the cleaning face of the underlying column is taken equal to the sum of the length of the discharge zone from x works in the upper layer and back pressure zone, the formation of the layers of preparatory workings is made after the advancement of the working faces, while the layer preparatory workings of the lower layer relative to the layer preparatory workings of the upper layer are formed at a distance of 35 40 SRI equal to 1.0-5.0 width of their cross section, and the protection of the layer of preparatory workings carried out cutting support. A-t ( , -. D. L ", ; ...;  / ; i.Vv.-7v4: -i: ° -: f: lV  V ,,, FIG. g i / a. f-s t  V and. Vi :.,. asflnse Fi & 5 / 2