SU1624161A1 - Method of developing thick sloping coal seams - Google Patents

Abstract

The invention relates to the underground mining of coal seams by layers. The purpose of the invention is to increase the efficiency of cleaning operations by increasing safety as a result of providing for the preparation of the layers higher fire-fighting characteristics of the boundary pillar with minimal cost of fire-fighting measures. Inclined flank workings, layer conveyor and ventilation drifts along the strike of the reservoir, delineating the extraction pole, and layered inclined installation workings near the soil and the roof of the reservoir with a displacement in the direction of the clearing dredging of the lower layer generation, relative to the upper layer development, no more than the width of the insulation strip, which is erected in the power assembly workings. The isolation strip is erected in the assembly workings from the opposite direction of the clearing notch, feed hardening mixture into the installation of the upper layer through the pipeline that is laid under its roof, and by passing the mixture into the installation of the lower layer through the wells that are drilled along of the rear pillar between mounting workings of the upper and lower layers at a distance from each other not more than half the radius of the mixture spreading cone. Production is fixed. At the flanking workings on the clone workings, a boundary pillar is formed, which is treated with antipyrogenic compounds 3 or (C

Description

The invention relates to the mining industry and can be used in preparation for the excavation of powerful flat coal seams worked by layers.

The purpose of the invention is to increase the efficiency of cleaning works by increasing safety as a result of providing higher fire-fighting characteristics of the boundary pillar during the preparation of the seams at the lowest cost of fire-fighting measures.

Fig. 1 is a plan view of the implementation of the proposed method;

Fig 2 - section A-A in Fig 1, Fig 3 - section B - B in Fig 1

The method is carried out as follows.

To prepare for the excavation of a thick flat coal seam, inclined flanking openings 1 and 2 were made, the outlined conveyor 3 and 4 and the ventilation 5 and 6 roadways along the coal seam were outlined by the outgoing column. Then, layered inclined mounting openings were made. and 8 roofs of the seam and soil. The assembly development of the lower layer is carried out with displacement relative to

about

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assembly workings of the upper layer in the direction pvvaganich cleansing faces, resulting in the flank inclined workings form the boundary pillar 9 of a more stable form. The mounting outlets 7 and 8 are periodically interconnected by inclined wells 10. The outlets are fixed.

From the mounting workings of the upper and lower layers, the boundary pillar is treated with antipyrogenic compounds and interconnected insulating strips 11 and 12 are erected from the hardening bookmark in the workings 7 and 8 from the side opposite to the clearing recess.

Insulating strips of hardening bookmarks erected as follows.

On the side of the pillar, at a distance of, for example, 1.0-2.5 m from its wall, the hemming 13 of waterproofing materials is installed. The stowage material is fed into the withdrawn space via conduit 14 under the roof of the mounting work 7.

The bookmark material, spreading, forms a cone of bookmark spreading. Having filled a part of the otshit space in the assembly workings of the upper layer to the nearest inclined well 10, the backfill material is transferred by gravity along the inclined well to the otshit space in the installation workings of the lower layer. The distance between the inclined wells that drill along the boundary pillar is assumed to be no more than 1/2 of the spreading cone radius.

In this way, insulating strips are formed, which are interconnected by means of a laying hardened in inclined wells. In this case, the displacement of the excavation workout 8 relative to the installation output 7 in the direction of the approach of the work faces is equal to no more than the width of the insulation strip. Otherwise, the inclined wells will partially be located in the interlayer charcoal pack under the installation development of the upper layer, which will lead to the collapse of the walls of the inclined wells during the production works in the installation development of the upper layer.

Claims (1)

Invention Formula A method of preparing powerful flat coal seams, including conducting inclined flanking openings, outlining the excavation column of layered conveyor and ventilation drifts along the strike of the formation and layered inclined mounting openings at the soil and roof of the reservoir with offset of the lower working assembly of the lower layer relative to the mounting output of the upper layer in the direction the advancement of the clearing recess, the formation of the boundary pillar at the flank inclined workings and the fixing of the workings, characterized in that, in order to increase the effect efficiency of cleaning works due to increased safety as a result of providing, during the preparation of layers, higher opposing characteristics of the pillar pillar with minimal expenditures on firefighting measures, in installation workings of the upper and lower layers, insulating strips are installed on the side opposite to the direction of the clearing recess the mixture into the assembly development of the upper layer through the pipeline, which is laid under its roof, and by passing the hardening mixture into the assembly The development of the lower layer along the wells that drill along the boundary pillar between the mounting workings of the upper and lower layers at a distance of no more than half the radius of the mixture spreading cone, and the mounting output of the lower layer relative to the mounting output of the upper layer is not more than the width of the isolation strip, and the edge pillar is treated with antipyrogenic compounds. five W FIG. I 12 FIG. five