SU1737119A1 - For developing steep deposits by hydraulic giant - Google Patents

Abstract

Use: layers of average power, laying out the goaf. SUMMARY OF THE INVENTION: Subparagraph 7 conducts a ventilation drift 9. The coal is removed by a hydraulic monitor 10, which is placed on the device 11. A waterproofing element 12 is mounted on the soil of the ventilation drift. On top of it is covered with a flexible overlap 13. In the middle part of the excavation floor an installation chamber is held 15 and ort 16. In the orte, the anchors 17 fix the waterproof element and the flexible overlap. During the excavation process, the carbon waterproof element is pulled out with a winch along with a hydro monitor. The bookmark is fed through a pipeline, which is placed in the ventilation drift. 9 il.

Description

1

The invention relates to the mining industry, in particular, to the development of steep seams of medium intensity with hydraulic excavation of coal and the development of space.

There is a method of working out a steep gol stratum by horizontal strips along the uprising with a hydraulic mortgage. The coal excavation here is done by a combine harvester with a mount and a hydraulic paddle of the developed space. A combine and a scraper conveyor are located on pontoons.

The following disadvantages are inherent in this method: the need to use a filling material with strictly regulated filtration properties; limited scope, since at a depth of more than 200 m, the upper coal mass collapses to form domes, and when the excavation floor is refined near the ventilation layer, a situation is created that causes dynamic effects, rock bursts and sudden outliers; significant consumption of materials for fastening.

There is a method of developing thick steep seams by horizontal layers of a mechanized complex KGSZ. The coal is excavated by a combine using rigid hardening bookmarks, the coal is transported by a scraper conveyor.

This method has the following disadvantages: high cost of filling material; the need to secure the developed space, since the stability of the artificial ceiling is insufficient; low technical and economic indicators when mining the reservoir with a capacity of less than 12 m.

There is a method of testing steep seams by the system of sublevel hydroturbing under flexible overlap. In this method, the excavation field is divided into sub-floors with a height of 8–15 m. Coal extraction in the sub-floors is carried out by hydromonitors. A flexible metal overlay is used to separate the coal from the collapsed rocks.

This method has the following disadvantages: large loss of coal; lack of ventilation due to general depression; frequent cases of spontaneous combustion of coal; disintegration of the rock mass due to the bypass of the collapsed rocks in the stopping.

The purpose of the invention is to reduce the loss of coal and the consumption of materials for fastening.

The goal is achieved in a method of developing steep coal seams with a hydraulic recess, which includes holding a mounting chamber, sublevel drifts and orts, installing a flexible ceiling and working off sublevels with a jetting device installed on a special device in the sublevel drift. The development of the sub-floors is carried out with a bookmark of the open space, while under the flexible overlap and backfill array of the upper floor, a ventilation drift is placed and placed on the ground of the last section of the waterproof element, and the flexible overlap is mounted on top of the waterproof element

5, the length of the entry in the subsurface drift of the sub-floor section of the water protection element being worked out is dismantled and mounted again on the ground of the ventilation drift of the lower floor level being prepared for excavation.

A special device for dismantling the water protection element consists of several tg, jacks and cams, and the jet monitor is mounted on the receiving

5 pad device.

FIG. Figures 1-5 depict a process diagram of coal extraction using a hydraulic method with the laying of a goaf.

0 The extraction field on the main horizon with a field drift is opened on the flanks by intermediate frames 1, 2. On the ventilation horizon, two intermediate ones are also conducted from the field drift

5 ventilation cross-sections 3, 4. From cross-sections 3. 4, the slopes 5 are led to the main horizon. 6. In addition to transporting coal, slopes 5, 6 serve to ventilate, move people and deliver stowing

0 material and equipment.

To work out substage 7 parallel to the ventilation drift 8, a under-floor drift 9 is conducted. The coal in substage 7 is removed by a hydraulic monitor 10 installed

5 on a special exhaust device 11 for dismantling the waterproof element 12. The waterproof element 12 is mounted on the ventilation drift 8. On top, the waterproof element 12 is covered with a flexible overlap 13. For the initial installation of the waterproof element 12 and the flexible cover 13 in the bottom section of the bottom section 14 in the middle of the excavation floor, a mounting chamber is conducted

5 15 and ort 16, in which anchors 17 fasten longitudinal ribbons of flexible overlap 13 and sections of a waterproofing element 12. When preparing the adjacent strip 18, orth 16 is knocked off with a ventilation drift 8, and sublevel drift 19 exposes the first sections of waterproofing element 12, flexible overlapping 13 and backfill array.

The ventilation drift 8 is fastened with a special support 20. The side posts 21 of the support are stitched with anchors 22, and the tops 23 are installed under the flexible overlap 13 of the upper substage. In addition, clamps 24 are installed, which are supported by angled racks 25. Compressed air is fed through pipes 26 laid along the ventilation drift 8. The waterproof element 12 and the flexible cover 13 are also mounted here. The waterproof element 12 consists of rubber mats which are attached The hinges 27, which consist of lugs 28 and rods 29 (Fig. 6, 7), are interconnected. To dismantle the waterproofing element 12, a special exhaust device 11 is installed on the sublevel drift 9, which consists of a receiving platform 30, guide plates 31, cams 32, tons 33 and jacks 34 (Figures 8, 9).

The excavation strips are given a slope of 0.05-0.08 from the middle part of the excavation floor to the ramps 5, 6, which provides self-flowing hydrotransport of coal to the coal starting pipes installed in the slopes 5, 6, and then to the local pulp pumping stations.

The notching field is divided into two sections, which allows not only to separate in space, but also to combine excavation, backfilling and preparatory work in time, as well as to provide sufficient time reserve for compacting the backfill array. The continuous coal mining technology is provided, as with the approach of the cleaning works to the slope, the cleaning works on the adjacent part of the excavation floor begin.

The sub-floor height is 8–15 m. When dredging, the coal strip is not fixed, except for the mounting chamber.

To remove the waterproof element 12, the flap 35 is folded back and, using jacks 34 and 33, the waterproof element 12, clamped in cams 32, is pulled out of the exhaust device 11. Here, the rod 29 is pulled out and the section of the waterproof element 12 is removed. Safety device 11 is winched together with a hydraulic monitor.

During cleaning works and when penetrating the ventilation and sublevel drifts, they are ventilated due to a general mine depression,

for this, they are knocked down 10–15 m by holes 36 with a diameter of 850 mm.

A stowing machine is installed on the drift of the ventilation layer in the middle part of the excavation floor. Therefore, the backfill material is first fed on one slope, and then on the other, coal as well - first on one slope, then (when mining the neighboring strip) on the other.

The advantage of the proposed method is. coal losses are reduced from 20–25 to 5–7%. Due to the use of a spaced bookmark, the ash content of the rock mass is reduced due to

use of water protection elements; the consumption of materials for fastening is reduced by increasing the height of the substage and reducing the rock pressure due to laying out

spacing and reducing the weight of hovering undermined rocks. In addition, the safety of work is improved, as the ventilation drift provides airing due to general depression

and an emergency exit from the slab through the connection. The productivity and utilization rate of the jet monitor is increased, since the waterproof element and the exhaust device reduce the time for formation

pulp flow and transport of a water jet.

Claims (1)

Invention Formula The way to develop steep coal seams with a hydraulic recess, which includes holding the installation chamber, sublevel drifts and orts, installing flexible overlap and rationalization of sublevels by dropping by means of a hydromonitor mounted on a special device in the sublevel drift, characterized in that in order to reduce coal losses and the consumption of materials for fastening, working out the sub-floors are with the laying of the goaf, at the same time, under the flexible overlap and backfill array of the upper substage, the ventilation drift is passed and the last section of the waterproofing element is placed on the soil, and the flexible overlap is mounted on top of the water protection element, and after removing the coal for the length of the entry in the sublevel drift of the substage of the water protection element being worked out, the sections of the water protection element are dismantled and mounted again on the ground the ventilation drift of the lower substage being prepared for excavation. SP r-r r5V and 4  ; “R ... L .. ... rr s. -. . - "..... :: -tr P TG.TG H 1G P 1G It ff i OQQOOOOQOOOCO aszshsszasza eiuen W li 3L 33. 3fc frr & 7 7