SU976071A1 - Method of forming an undercutting space - Google Patents

Description

(54) METHOD OF EDUCATION OF SUBSIDIARY SHUSTERSTVA

one

The invention relates to the field of mining and can be used in the underground mining of powerful ore deposits with massive collapse.

There is a known method of preparing the bottom of the block, which includes the penetration of the rasping trench, paired workings of the delivery and one-sided oblique duchek with receiving windows arranged in a staggered order, with duchet windows at the level of the sweeper trench positioned along its length in row 11

The disadvantage of this method is the low stability of the cutting area in the form of an upward trench.

The closest technical solution to the invention is a method of forming a cutting area, which includes sinking the workings of the bottom of the block, forming ore receiving mines, drilling loading and blasting of counter-directed fans of the wells and producing broken ore.

The disadvantage of this method is the greater laboriousness of the formation of the cutting area due to the need to drill additional workings above each drilling excavation, complexity and ruggedness of the base of the block, which reduces the stability of the block.

The aim of the invention is to reduce the labor intensity of the work.

Delivered del is achieved by the fact that according to the method, which includes sinking the workings of the bottom and ore-receiving workings, drilling, charging and blasting of counter-facing fans of the wells and the production of ore, the cutting space forms a triangular shape with an apex angle indented into the array, equal to the angle friction of rocks by drilling fan wells from adjacent bottom workings.

Claims (2)

FIG. Figure 1 shows a schematic diagram of the method for cutting panels with vibrating ore — a projection onto a vertical plane at the moment the sub-space is smoked; Figure 2 is the same after unloading the ore from the cutting area; Fig. 3 is a schematic diagram of the method of hooking the unit with the scraper delivery and loading of the ore 397 projection onto the vertical plane at the moment of cutting the cutting area. The division of the reservoir into floors, and the floors into panels and blocks, and the mining of preparatory and rifling works, are carried out by well-known techniques. The method is carried out as follows. When the panel 1 is hooked up, the bottom 2, which is equipped with vibration units for ore discharge, counter tandem fan holes 5 and 6 are drilled from trench bars 3 and 4, and the upper wells of fan 7 and 8 are angled so that during the explosion of charges placed in these wells, the cutting space 9 is triangular in shape with a vertex angle equal to the angle of internal friction for these rocks. The design of the trenches 10 to the design contours 11 is carried out by drilling horizontal wells 12, the blasting of which produces a massive panel collapse, i.e. in case of explosion of charges in wells 13. If block 14 is prepared by funnels, for example, for scraper delivery and loading of ore, drill bits 18 and 19 pass over the funnels 15 of ducts 16 and 17. Counter boring wells 20 are drilled from drill holes 18 and 19. and 21 as described above. The formation of the podzek space by blasting explosive charges in the wells is carried out on a vertical cutting slot (conventionally not shown) in the variant with a trench undercut, and in the variant with preparation, the formed pods can be formed on the finished cones or on a vertical cutting slot. The application of the proposed method allows the formation of an undercut space with minimal expenses of any volume and maintaining the stability of the ore mass in a block or panel, which will ensure trouble-free mining of the block, good crushing of the ore and the stability of the bottom workings, including penetration of the bottom workings block, the formation of ore mines, drilling, loading, and killing of counter-directed well fans and the production of broken ore, characterized in then, in order to reduce the complexity of work, forming a triangular space slash The shape of the angle at verschine directed deep into the slugger array equal to the angle of internal friction rock drilling wells by fans of the adjacent bottom openings. Sources of information taken into account in the examination 1. The author's certificate of the USSR N 386139, cl. E 21 C 41/06, 1966. 2. Authors certificate of the USSR N 626209, cl. E 21 C 41/06, 1977 (prototype).