SU1448081A1 - Reinforcements for filling consolidation - Google Patents

Abstract

The invention relates to mining and m. used in underground mining. The goal is to reduce the labor intensity of the installation of reinforcement by eliminating drilling operations. The armature includes modules 4, w ith M parayh rods (C) 6.7 and curved strips of grids 5. The latter are hung in a curved part downwards at C 6.7, installed L-shaped: At the top, C 6.7 are connected by means of mobile nodes 8 changes in the distance between the lower ends of the C 6.7. The strip of the grid 5 of the standard width is laid on the soil 2 of the excavation 1, and in a retreating order the edges of the strip of the grid 5 are folded upwards with simultaneous installation of C 6.7. The grid strip 5 is secured with latches 9. After the installation of the first module 4 is completed, other modules 4 are mounted, which, depending on the mining situation, are interconnected in rows along the length and width of production 1. After installation, the production 1 is filled with filling material. 2 hp f-ly. 4 il. 2 SL

Description

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The invention relates to the field of mining and can be used in underground mining with ore blasting and laying of the mined space with layers in a descending order.

The aim of the invention is to reduce the laboriousness of installing the reinforcement by eliminating drilling operations.

FIG. 1 shows a general view of the arcature in the cross section of the excavation; in fig. 2 - a general view of the reinforcement module, axonometric-Aeska projection; in fig. 3 and 4 are embodiments of the reinforcement structure.

FIG. I-4 denotes 1 sweep production, prepared for the construction of an artificial roof array; 2 - safety deposit from ore fines or I soil; 3 - mark the estimated height of the carrier layer for a given span of generation 1; 4 - reinforcing module consisting of a strip of mesh 5 and paired rods b and 7; 8 — mobile unit for connection of paired rods 6 and 7; 9,10-rebar retainer module 4; 11 - additional mesh strip; 12 - to the curing wire for connecting the strips of the grid 5 with the paired rods 6 and 7 and for connecting the modules 4 with each other; 13 - filling material. Structurally, the reinforcement is formed from modules 4, consisting of paired rods 6 and 7, installed L-shaped, and a grid strip 5, concave upwards and suspended on rods x 6 and 7 before contact with the working floor 2 1. Extreme upper parts of the grid strip 5 fixed by top clamps 9 on paired rods x 6 and 7 at a height equal to not less than the radius of the zone of active impact of the explosion (40 ... 50 radii of explosive charge, according to the practice of the Norilsk mines). The upper ends of the paired rods 6 and 7 are connected to each other in the movable unit 8, allowing the distance between the lower ends of the paired rods 6 and 7 to vary according to the location of their fixation by means of the support clamps 10 to the soil or the safety bedding 2 of the mine 1. Depending on the width of the span of the mine I and its configuration modules 4 are installed in rows across the mine 1 along the entire length and interconnected in the entrance wire 12. In some cases when it is required to ensure increased seismic stability to the backfill array, wasps grids 5 and neighboring rods 6 and 7 of adjacent modules 4 disposed in a row the width of one generation can be further interconnected. The effect of increasing the seismic stability of the artificial roof being built can be enhanced by hanging additional strips of grids 11 between the junctions of the paired rods 6 and 7 of the adjacent modules 4, arranged in a row along the width of the roof.

Depending on the mining and technical situation, other reinforcement design options may be applied. For example, in the workings 1 of an unsealed configuration, the width and height of the structure of the reinforcement can be mounted from modules 4, consisting of two rods 6 and 7, on which mesh 5 strips are hung with a length of 1 ... 2 m, while adjacent modules 4 can be installed at different angles relative to each other (not shown). In standard workings, which do not have significant deviations in width and height along the entire length, the structure can be formed from modules 4, consisting

5 from long strips of grids 5 (10 m and more) and a plurality of paired rods 6 and 7, while the long strips of grids 5 can be formed from two strips of a grid connected by an overlap (not shown).

The assembly of the reinforcement is carried out as follows.

Before laying the filling mixture 1, after creating a safety bed 2 of a given profile on the ground 1, modules 4 are mounted from pre-prepared strips of the grid 5 and the pair of rods 6 and 7. The standard 5 grid width of the grid 5 is laid on the soil 1 of the I and retreating pore 1 DK arch edge stripes mesh 5 up with one

Q temporarily installing rods 6 and 7. The upper ends of the paired rods 6 and 7 are connected to each other by the movable unit 8 by tying the rods 6 and 7 in the filling wire 12, and the lower ends of the rods 6 and 7 are installed in a fuse

cn bedding 2 as far as it will go into the ore or placed on the latch 10. The height of the rods 6 and 7 is prescribed depending on the calculated thickness of the base layer of the artificial roof. The mesh strip 5 is fixed with latches 9, which are used as

0 into the lead wire 12, on paired rods x 6 and 7 at a height equal to not less than the radius of the zone of the active effect of the explosion when the underlying ore is crushed.

Upon completion of the installation of the first Mall

, 4 mount other modules 4, which, depending on the mining and technical environment, are interconnected in rows along the length and width of production. I. Another method of assembling the structure of the reinforcement may be the assembly of a series of modules 4 prefabricated commercially.

After mounting the design of production. 1 lay a zakladochnym material. In the process of explosive blasting of the underlying mass of ore, part of the energy of the explosion, passing into the overlying backfilling

5, an array in the form of compression waves, meets on the border of the medium section a mesh mesh edge 5, which, due to the curvature and difference in acoustic stiffness of the materials of the mesh band

5 and the filling array 15 perform the role of waveguides that dissipate the energy of the compression wave and contribute to its attenuation. Weakened back waves of stretching reflected from the boundary of the zone of active impact of the explosion, as they pass through the massif, meet the planes of the grids 5 and rods 6 and 7 that are differently oriented along the planes, and the area of their joint with the concrete (adhesion) increases side of the exposed plane of the bookmark, so that they attenuate more intensively and are no longer able to cause secondary alternating oscillations. The horizontal displacement of the bookmark array from the action of surface waves (Relay waves) prevents the saturation of the module 4 armnivka in the horizontal directions, as well as the pinching of the rods 6 and 7 in the distance behind the zone of active impact of the explosion; 5 fixing them with rods 6 and 7 in the zone that is the least explosive, contributes to a better resistance of the array

seismic effects, and, consequently, the stability of the artificial roof from the backfill array increases.

Claims (3)

Invention Formula I. The reinforcement for strengthening the backfill array, including modules of curved grids attached to the rods, installed to the reinforcement assembly level, which is designed to reduce the labor-intensive installation of the reinforcement by eliminating drilling operations, the rods are installed L-shaped and are connected at the top by means of movable nodes with the possibility of changing the distance l between the lower ends of the rods, and the grid halves are turned downward with the bent part. 2. Armature according to claim 1, characterized in that the modules are installed in a row, and the strips of grids and adjacent rods are connected (each other). 3. Armature according to claim I and 2, characterized in that it is provided with additional grid strips attached to the connection nodes of the rods of adjacent modules; 0 phi.2 FIE