SU920212A1 - Method of working sloping coal beds - Google Patents

Description

(5) METHOD FOR DEVELOPING TIGHT COAL STRAYS

The invention relates to mining and can be used in underground mining of steep coal seams without the presence of people in the clearing face. There is a method of developing steep coal seams, which includes bringing openings delineating an ejection pole, dividing an ejection table of a ba into blocks by making rifled openings and filling the cross section of the latter with a hardening material p. The disadvantage of this method is a large amount of work on carrying out rifled openings. Also known is a method of developing steep coal seams, which includes carrying out workings, outlining the excavation column, dividing the excavation column into blocks by making rifled openings, filling the cross-section of the latter with hardening material and refining blocks 2. HeAGCTatKOM of this method is low efficiency of development, due to the large volume of rifled work. The aim of the invention is to increase the efficiency of development. This goal is achieved by the fact that, according to the development method, which includes carrying out workings, outlining the excavation column, dividing the excavation column into blocks by making rifled openings, filling the cross-section of the latter with hardening material, clearing the formation in each block with erection the uprising following the advancement of the cleansing face parallel to each other artificial pillars of hardening material and filling the space between the artificial pillars of the mortgage full-time material, with only one type of mining operations being performed in each block, ensuring continuity of excavation within the excavation column.

The drawing shows a diagram of the implementation of the proposed method for the development of steep coal seams.

The reservoir is prepared for development by means of ventilation 1 and 2 drift drifts. In the mine field, the excavation column is divided along the strike of the seam into individual blocks, each of which carries one threaded production 3, into which an artificial rear pillar 4 is erected after the uprising from the hardening tab. A part of the cross section 5 of the threaded coals & 3 adjacent to the rear sight coal serves for the passage of fresh air stream and devices ensuring the operation of the excavation machine 6 (the traction rope of the excavation guide ski, etc.) using movable formwork 7 "connected to a flexible hose 3 for supplying hardening bookmarks and traction ropes (not shown in the drawing) to move formwork 7 and shanang 8. As the coal is dredged in the worked-out area 9 erecting an alternate, parallel to the bottom, artificial rear sight 10 of the hardening tab.

The coal excavation in the clearing excavation 9 is carried out by the excavation machine 6 (combine, plow), which operates according to a one-sided or shuttling scheme of fastening the developed space. In the developed space of each block, as the excavation is carried out, the coal is erected with a number of other artificial ones, and the space between them is filled with a backfill material, for example, rock 11, delivered along ventilation 1 drift. For receiving the repulsed coal arriving by gravity from the clearing generation 9, receiving-handling bunkers 12 are installed on the haulage drift 2, the rear part of which performs the functions of formwork during the construction of the pillars 13 of the hardening tab.

In each block, only one type of mining operation is carried out, for example coal injection, erection of the rear sight or filling of the developed space with backfill material.

With such work, possible failures when working in one unit have a detrimental effect on the performance of work in other blocks.

The use of the invention allows to increase the efficiency of the development of steep coal seams by reducing the volume of rifled work, increasing labor productivity, eliminating the loss of coal in the pillars, and ensuring the safety of work.

Claims (2)

1 .. German Patent If j 208271, cl. 5 V, publ. 1966 .. 2. Biryukov R.. Improving the development of steep seams of Kuzbass. M., ZNIEIugol, 1971, p. 98-105 (prototype).