SU1046536A1 - Method for ventilating stoping face in working thick steep and inclined seams in horizontal splices using mechanized complexes - Google Patents

Abstract

THE METHOD OF VENTRATING THE CLEANING OF ITS CARE DURING THE DEVELOPMENT OF POWERFUL RIGHT AND INCLINED HORIZONTAL PLATES WITH THEIR LAYERS WITH THE APPLICATION OF MECHANIZED COMPLEXES, including the supply of fresh air to the clearing face. | through wells that were preliminarily traversed at the roof of the reservoir and connected to the dredging face with the underlying air supply, and diverting contaminated air to the ventilation horizon, characterized in that, in order to increase reliable drilling of the clearing hole, wells for supply air in the working face is oriented at an angle in the vertical plane towards the bottom, and the distances between the wells are equal to the length of the bottom hole diagonal is simple; {g (L with 4 СХ) el 00 3

Description

The invention relates to the mining industry and can be used to ventilate the refinery in the development of horizontal steep coal seams in horizontal layers.

There is a method of ventilating, cleaning the bottom during the development of powerful steeply dipping coal seams ropH30HTaJibHbiMH with layers under flexible overlap, which consists in supplying fresh air from the air production of the underlying horizon to the working horizons of the worked and used layers to clean the air into which you can get the most out of the day. fl.

The disadvantage of this method is its low efficiency due to the occurrence of layer accumulations of methane from the roof of the clearing well.

The closest technical solution to the invention is a method of airing a cleansing slab during the development of thick steep and inclined layers with horizontal layers using mechanized complexes, consisting in supplying fresh air to the clearing well. to us, previously traversed at the roof of the reservoir and connecting the clean bottom to the underlying air supply, and diverting polluted air to the ventilation horizon 2.

The disadvantage of this method is that it is necessary to carry it out. The construction of ventilation stacks connecting the cleaning face to the wells, which predetermines the greater laboriousness of the installation and dismantling of ventilation. Stability. It significantly affects the reliability of the ventilation of the clearing face.

The aim of the invention is to increase the reliability of the airing of the clearing hole.

The goal is achieved by the fact that according to the method of airing the clearing bottom during the development of powerful steep and inclined layers by horizontal layers using mechanized complexes consisting in supplying fresh air to the bottom hole through the wells previously passed at the top of the bed and connecting the bottom floor with the air supply below, and from; water contaminated with air to the ventilation horizon; the wells for supplying air to the clearing face are oriented at an angle in the vertical plane to meet at the bottom of the hole, with the distances between the wells being equal to the diagonal length of the wellbore space

FIG. Figure 1 shows a schematic diagram of the preparation and mining of the excavation floor; in fig. 2 shows section A-A in FIG. 1} in FIG. 3 shows a section BB in FIG. 1; FIG. 4 - a scheme of a clearing flank; in fig. 5 shows a section B-B in FIG. four.

The removal field is prepared by ventilation 1 and by hauling 2 field drifts, ria boundaries of the floor and the block (through 75 m) are conducted by slope 3 on the rock. At the level of ventilation, haulage, and layered 4 drifts, there are one or three strata connecting slopes 3 with drifts. A ramp 6 is held along the coal near the soil of the reservoir with a breeding ramp. The rear-mount rear sight 7 is processed with a bookmark. When working the layers, a flexible overlap 8 in the Single Plokost of the metal grid is applied over the tops. At the side of the formation, from the conveyor drift, ventilation holes 9, diameter cm 850 mm, oriented at an angle in the vertical plane towards them, are made. The distance between the wells is assumed to be equal to the length of the bottom hole diagonal. In this case, there is at least one well in the bottom hole. The distance between wells is determined from the expression

a b4h,

where L is the width of the instrument simple;

ranstva, m;

h is the bottomhole height, m.

The values of b and h are parameters that depend on the used mechanized support, so the length of the diagonal of the cleansing face, defined by the formula given, for each mechanized support is a specific value (i.e. it is also a parameter of each mechanized support) .

The need to equate the distance between the wells to the diagonal length of the cleansing blast (or rappi) is due to the fact that with a greater distance between the boreholes, none of them fall into the clearing space, i.e. Do not provide airing at the bottom. With the distance between the wells smaller than the diagonal of the cleaning space, the volume of the wells increases, which is not caused by the need to ventilate the bottom.

Ventilation of horizontal workings is carried out with the help of local fans (ventilation. Ventilation of the clearing hole is carried out due to general depression. A fresh stream of ventilation wells 9 enters the clearing face 10, washes away

it and through the layer drift 4, the breed ort 5 and the slope 3 are retracted to the ventilation horizon.

For the removal of horizontal layers {the CLS type 11 or KM-819 type is used.

During the development of the reservoir, a long-distance pillar 7 with a hardening bookmark of the developed space is first worked out, under the protection of which the first horizontal layer with collapse is removed. When working out: this layer, the flexible overlap in the same plane 8 of the metal mesh is WELL OVER through the institution: it is from the bottomhole space 10 over the top of the lining 12. Dredging

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-U

BB

(f / tiMK f / j / jf jjK / jK / yj (i / - / j / if / f: / j: - / f j / jf / f i

; / V // X / // vvy; c4 y (vy, 11

Fig.Z

horizontal layers are carried out under the protection of a flexible overlap of two simultaneously mechanized complexes 11 in two adjacent blocks.

When applying the proposed method of airing, the conduct of inclined (diagonal) wells is removed from the cycle of cleaning operations, thereby reducing the laboriousness of work in the bottomhole by an average of 20%.

In addition, at elevated rock pressure, the sloping ones practically retain the cross section, since they are located outside the zone of influence of the reference pressure, therefore, reliability of the bottom ventilation is increased. ..

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FIG g

FIG. five

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Claims (1)

454) METHOD FOR AIRING A CLEAN BOTTOM WHEN DEVELOPING POWERFUL STEEP AND TILTED LAYERS BY HORIZONTAL LAYERS USING THE MECHANISM- ROWING COMPLEXES, including supplying fresh air to the working face j through the wells previously passed at the top of the formation and connecting the working face to the underlying air supply, and the discharge of contaminated air to the ventilation horizon, characterized in that, in order to increase the reliability of airing the working face, wells for air supply to the working face, they are oriented at an angle in a vertical plane towards the movement of the face, while the distances between the wells are taken equal to the length of the prize diagonal slaughter simple; Fig!