RU2364722C1 - Developing method of heavy abrupt layer with cast solid stowing - Google Patents

Abstract

FIELD: mining engineering.

SUBSTANCE: invention relates to mining industry and can be used at underground operation heavy abrupt layer with stowing of open area. Method includes implementation of layerwise drifts, upraise and alternate development of cut in horizontal fibers by means of combine and following filling of cuts by cast solid stowing. Before stowing supplying, on cut soil there are laid chutes and are installed shields for reservation as operating layerwise drift in waste horizontal fibers. Layerwise drifts are implemented up to beginning of layer development nearby top or nearby layer soil and they are used for coal transportation, ventilation and feeding of cast solid stowing into cuts of underlying horizontal layer.

EFFECT: increase of labour productivity and safety of mining.

8 dwg

Description

The invention relates to the mining industry and can be used in the underground development of powerful steep formations with the laying of the worked out space.

A known method of developing a powerful steep layer of minerals with the laying of the developed space (AS No. 1472673 USSR, MKI. E21C 41/04, application. 11.06.86, publ. 15.04.89, Bull. No. 14. Coal mining in this invention carried out hydraulically, which significantly increases labor productivity.

The disadvantages of this technology include the fact that when mining the chambers, a large amount of work is required to maintain the roof of the formation, in addition, the complicated ventilation of the working faces and the maintenance of the backfill array reduces the safety of mining.

These disadvantages are eliminated in the other closest to the claimed method (Kilyachkov AP Technology of mining. - M .: Nedra, 1985, from 265-267). Coal mining here is carried out by approaches along the strike of the formation, followed by filling the worked out space with a cast hardening tab. The features of this technological scheme are: a large length of calls along a strike of 400-500 m; top-down layer mining order; the use of cast hardening bookmarks, fed into the worked out space after the moving face.

The disadvantages of the technology are as follows: complex ventilation of the face and transportation of coal; limited scope (m≤8 m); low labor productivity; due to possible collapse of the backfill array, dangerous working conditions are created.

The objective of the invention is the creation of such a method of developing a powerful steep formation, which improves the working conditions of miners, improves labor productivity, reduces the complexity and safety of mining.

To do this, in the method of developing powerful steep strata of minerals with the laying of the mined-out space, including working out horizontal layers with stitches in staggered order, using combines and preliminary conducting lay drifts and rising workings, working out the stratum is carried out in horizontal layers, stays intersected with stays of the overlying layer and filling the worked-out space with a cast hardening tab, and before the bookmark is fed into the soil, the grooves are laid, and at the interface Shields are installed to leave a lay drift, which is carried out before the development of a horizontal layer at the roof or near the formation bed.

The method is illustrated by drawings, where in Fig.1 shows a diagram of the preparation and development of the excavation field with the placement of the working faces and preparatory workings; figure 2 - working out even passages in the first horizontal layer (section aa in figure 1), figure 3 - working out even passages in the second horizontal layer, section bB in figure 1; figure 4 - development of odd entries in the second horizontal layer; figure 5 - mining of the third horizontal layer, section bb in figure 1; figure 6 - working out of the sunset of the third horizontal layer; Fig.7 - filling of the second horizontal layer of castings hardening cast bookmark; on Fig - working out the third horizontal layer.

Figure 1-8 shows the technological scheme of coal mining in horizontal layers (with the laying of the mined-out space) - inserts using a combine, and the location of the inserts in the layers at a certain angle with respect to the lateral rocks of a steep formation.

The excavation section on the ventilation and discharge horizons is opened with cross-bars 1, 2. Then slope 3 is carried out and the preparation of the section begins. Ventilation 4 and haul-off 5 drifts are carried out. At the boundary of the site, a flank slope is carried out 6. The horizontal layer is worked out using a roadheader 7, which staggeredly removes coal at first in even 8, then in odd 9 inclined runs and transports coal to the drift located at the top of the roof 10 or at the soil of the 11th layer. Before the bookmark is laid, gutters 12 are laid on the soil, and, on the drift side, shields 13 are installed and extended. When the drift 10 is located at the top of the formation, the latter is connected to the slopes 3, 6 with the help of inclined ramps 14, 15.

A method of developing a powerful steep formation is as follows. Prior to the start of treatment work, from the cross-valves 1, 2 on the ventilation and discharge horizons to the boundary of the excavation section, ventilation 4 and recoil 5 drifts are carried out. At the same time, slope 3 is held, which connects the horizons. After drifts 4, 5 to the border of the excavation section is carried out flank slope 6.

The development of the first horizontal layer is carried out by approaches towards the top of the formation with the ventilation of the faces by local ventilation fans. As the evenings 8 are worked out, the grooves 12 are laid onto the soil of the openings for airing the underlying horizontal layer due to the mine depression.

At the interface of the ventilation drift with the sunsets, shields 13 are installed and burst, through which a hardening tab is fed. Odd approaches 9 are worked out and laid in the same way. Ventilation drift 4 remains unladen. Preparation for working out the underlying horizontal layer is carried out by drawing from slopes 3, 6 inclined orts 14, 15 and drift 10 located at the top of the formation.

The layer mining is also carried out by inclined approaches 8, 9 in a shaft-like manner from the drift located at the top of the formation 10, and to effectively maintain the filling array in the overlying openings, the openings in the underlying layer are tilted in the opposite direction with respect to the overlying openings. The openings of the underlying horizontal layer are aerated due to the mine depression. Fresh air from the main horizon enters the ramp 3 to the inclined unit 14 and then to the drift 10. When coal is mined in the drills, the air from the drift 10 through the run-out troughs 12 goes to the drift 4, and then through the ramp 3 it enters the ventilation horizon.

After the extraction of coal, shields 13 are installed in the junctions of the second horizontal layer and a hardening tab is fed from the ventilation drift 4 into the mined-out space (the junctions of the second layer). The drift 4 of the first layer is filled and the drift 10 is left in the second horizontal layer. The third horizontal layer is worked out in the same way as the first, only the airing of the calls is carried out due to the mine depression. Fresh air for venting the openings in the third horizontal layer is supplied from the ramp 3 to the drift 11 located near the soil of the formation, and the exhaust air through the trough 12 goes to the drift 10 located at the roof of the formation.

The underlying horizontal layers are worked out similarly.

Claims (1)

A method of developing powerful steep seams with a cast hardening laying of worked out space, including working out horizontal layers with cuts in a checkerboard pattern using combines and preliminary conducting layer drifts and rising workings, characterized in that the working out of the formation is carried out in horizontal layers, cuts intersected with the cuts of the overlying layer, moreover, before filling the worked-out space with a cast hardening tab on the soil, the gutters are laid in the gutters, and on the interface of the gaps t shields to leave a lay drift, which is carried out before the development of the horizontal layer at the roof or near the formation bed.

Images