SU1710750A1 - Method of mining thick coal seams with filling - Google Patents

Abstract

The simulation relates to mining and reduces the laboriousness of the work and the loss of coal due to the separation of the coal seam and the underlying material. The floor is divided into subsurface conveyor drifts. On the upper horizon, a strip of coal is being worked off and on the ground with cc. A flexible overlap (sg) is formed 2. An insulating layer (s) is erected over the sG 2. 3. Reinforce it with a band ^. As the first layer was worked out, a cirrh drift (VS) was erected closer to the center in it. 5. The VS 5 was fastened with a temporary arch support. In the soil, VSh S form IP 3 windows 6. As the mechanized complex pushes, GP 2 is lowered onto it from under the IP 3 above. GP 2 and form a new IP 3 with windows. From the overhead VS S through the windows are laying the worked-out space of the underlying layer. At the same time lead the repayment of the top YO 5. 1. f-ly, 2 ill.% (ЛСВ "• f •; ± ^^^ i ^^^^ u ^: ^^ N4 > & x: \\\\\\\\ h HHchyug 3- * ' ./^ JV

Description

The invention relates to a system for the development of thick coal seams for cleaning mechanized complexes in case of layer excavation with the release of coal and the laying of a goaf and can be used in mining.

There is a method of developing thick coal seams, including the erection of an artificial reinforced concrete roof - an insulating layer, and the subsequent excavation with a coal combine in the lower, burning layer under the protection of an insulating layer.

The disadvantage of the method is the high labor intensity of the clean-up work, the need to reliably maintain the insulating layer during the period of complete excavation of the underlying layer, the subsequent erection of the next insulating layer, and the possibility of backfilling.

The closest to the proposed method is a method of developing a coal bed with a bookmark, consisting in coal mining of a mechanized complex by subsurface along a strike, including preliminary implementation of the conveyor and ventilation drifts, installation of the mechanized complex and mining of underlying layers, laying of the insulation layer on the base and laying out the space.

The disadvantage of this method is the high labor intensity of the preparatory work, which involves carrying out conveyor and ventilation drifts, which are later redeemed, and also erecting a drift (ditch) under the insulating layer in the middle of the formation layer. In addition, the known method has high coal losses due to its mixing with the filling material, which can cause the coal to self-ignite.

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The purpose of the invention is to reduce the labor intensity and loss of coal due to the separation of the coal seam and backfill material.

Purpose Achieved by the fact that in a well-known method of developing powerful coal seams, consisting in coal mining of mechanized complexes with substates of forgiveness, including making conveyor and ventilation drifts, working out the underlying layer of the mechanized complex, laying the insulation layer on the base and laying the worked out the spaces, the ventilation drift is made as the coal is dredged in the form of temporary arch support, a flexible ceiling is laid under the insulation layer, and the laying of the tannogo space is carried out over a flexible overlap, vyrabotanire lowered into the space of the previously formed overlying vent drifts through the window, leaving employed in the insulating layer.

The proposed method has the following features.

The ventilation drift is carried out according to the Measure coal dredging in the form of temporary arch support. This feature is known from the development systems when conducting cleaning works with the 1АЩ complex with the ventilation drift erection. A flexible overlay is laid under the insulation layer. The laying of flexible overlap on coal is widely known, however, its laying under the insulating layer is unknown. Yaakladka of the developed space is conducted over the flexible, overlapping, lowered into the developed space from previously made ventilation drifts through the windows left in the insulating layer.

FIG. 1 shows a layer in a pade, section; in fig. 2 is a section A-A in FIG. 1.

The method is carried out as follows. .

The entire height of the floor is cut into the substandard conveyor drivable drifts 1, passed either at the ground or at the roof of the seam (Fig. 1). On the upper horizon, a strip of coal (first layer) is worked out with the laying of a flexible overlay 2, on top of which an insulating layer 3 is erected, which is reinforced by a strip 4. As the first layer is worked out, a ventilation drift is built in it closer to the center in the form of temporary arch support, in the soil of which, in the insulating layer 3, the windows 6 are left. After the first layer has been worked out, equipment 7 is installed in the created ventilation drift 5 for maintenance work, in the underlying layer - mechanized 1 Complex 8 of the KNKM type with the release of coal from the interlayer thickness (Fig. 1 and 2) The power of the removed layer is more than 5 m and depends on the properties of the coal and host rocks. The same characteristics affect the thickness of the insulating layer 3. Complex 8 is equipped with a pipeline 9 supplying the concrete solution to erect an insulating layer 3 and ka sets of metal strips 2 and k, respectively, for erecting a flexible ceiling and reinforcing an insulating layer 3 laid on it. To prevent the flexible ceiling 2 from sticking together A separating strip 10 of polyethylene can be erected between them on the basis of a layer 3. These works are carried out directly from the clearing flank, protected by a mechanized roof support. As the complex is pushed, a flexible overlap 2 is allowed on it from under the upstream insulating layer 3, which subsequently remains in the rubble above a certain insulating layer to be built. When mining the underlying layer, coal from the interlayer pack is discharged through the hatch 11 to the corner conveyor 12, which moves it to the conveyor curtain 1 and builds over the flexible overlap 2 of the new insulating strip 3 reinforced with a strip. A new vent 5 is left, and from the overlying vent drift, the spent space is laid using equipment 7 through windows 6. At the same time, the upper vent drift can be repaid. In the known method this is not provided, and two additional drifts are made to carry out ventilation and backfilling operations. In the proposed method, the ventilation drift, cleaning face and conveyor drift are used for ventilation, Mto reduces the labor intensity of work. Separation of the backfill array and the produced coal by flexible overlap eliminates the loss of coal and, therefore, eliminates the spontaneous combustion of coal. Insulation layer 3 may be reinforced with anchors to the soil and roof of the formation. Thus, the presented method, in contrast to the known method, allows to reduce the laboriousness of work and losses. coal in the blockage, which will significantly increase the productivity of workers in the longwall and reduce the cost of coal. 1. A method of developing thick coal seams with a bookmark, including conducting and securing conveyor and ventilation drifts, layer-by-layer mining of the formation with a mechanized complex of substates along the strike, forming an insulating layer on the soil layer and laying the depleted space This is so that, in order to reduce labor-intensive work and coal losses due to the separation of coal seam and backfill material, the ventilation drift is carried out as the coal is dredged, and Layer layer is laid with flexible overlap, insulating layer is formed with windows on top of flexible overlap, windows being made in the soil with a ventilation drift, and laying of the effected space is conducted over the flexible overlap through the decree (: 1st windows. 2. Method according to claim 1 This is due to the fact that the fastening of the ventilation drift is provided with a temporary arch support.

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Claims (2)

Claim 1. A method of developing powerful coal seams with a bookmark, including conducting and securing conveyor and ventilation drifts, layer-by-layer mining of a bed with a mechanized complex of sub-floors along strike, formation of an insulating layer along the soil of the layer and laying of the worked out space, which is different in order to reduce the complexity of the work and the loss of coal due to the separation of the coal seam and the filling material, the ventilation drift is carried out as the coal is mined, while a side overlap, an insulating layer is formed with windows on top of the flexible floor, the windows being carried out in the soil of the ventilation drift, and the laying out of the worked out space is carried out on top of the flexible floor through the said windows. 2. The method according to p. ^ Characterized in that the fastening of the ventilation drift is temporary arch support.