SU1283404A1 - Form for constructing supports of mine workings - Google Patents

Abstract

The invention relates to underground construction and allows to increase the density and strength of the lining being created due to controlled release from the filler space (GF) 25 of the filtrate supplied to the hardening mixture for formwork. For this, the drainage pipes 12 of the formwork are made in the form of glasses, and fixed in the holes of the formwork with the sleeve 21 and a screw 20. The pipes 12

Description

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have a side perforation 15 on the part serving in the ZP 25. The nozzles 12 are provided with side filters 24 in the form of grids installed on the outside of the nozzles 12 in the ZP 25, Bottoms of each nozzle 12 are installed in the arbor - part of the production to the stop in the rock. The bottom is made in the form of perforated fixed 16 and rolling 17 sectors of the bottom filter. The drive supply sector 17 provides a handle 18. The end of the nozzle 12 protruding into the production is wrapped to securely fasten the drainage pipe to it. When coming from the nozzle 12 of the mixture by turning the handle. 18 close the bottom filter hole. The supercharger pump creates overpressure to further filter out the mixture of the liquid phase and compact the solid phase. 1 hp ff. 6 Il.

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The invention relates to subsurface construction and can be used to create single-layer and fiberglass with hardened rock monolithic lining in horizontal and inclined underground workings.

The aim of the invention is to increase the density and strength of the lining being created due to the controlled release of a hardening mixture from the fillet space.

4IG.1 shows mobile formwork with holes for tamper and drain nozzles, a transverse section along the axis of generation; by 4 mg. 2 is a view A in FIG. in fig. 3 node 1 in figure 1; in fig. 4 - view B on fig.Z; in fig. 5 is a view B of FIG. 3 of FIG. 6 is a view of FIG. 3.

Mobile formwork is made in the form of a frame from sheet metal forming wall 1 attached to stiffeners from special profile 2, l consists of separate sections 3 1.0 m wide. Each section consists of foundation supports 4, folding 5, side 6 and vaulted 7 parts . The bases 4 are removable and fixed to the hinged parts with bolted joints. Foldable 5, side 6 and vaulted 7 parts are interconnected by hinges 8, Sections 3 are fastened together by bolted joints using special lugs 9, Section joints are caulked by stamping 10, Near holes 11 in the forming wall 1 for fastenings of cement and drain pipes 12,

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made in the form of glasses, brackets 13 with bolts 14 are attached. The discharge pipe 12 (FIG. 3) has lateral perforations 15 on the part protruding into the bottom space, and the bottom is blind (for lateral wells) or in the form of perforated fixed 16 and movable 17 sectors . The movable sector 17 is rotated by means of a power handle 18. The handle is installed in the working position and turned into a pipe in slots 19. The protruding end of the pipe is completed (Fig. 5) to securely attach the drainage hose to it.

The drain pipes 12 are fixed in the holes 11 of the formwork with the screw 20 and the sleeve 21, which simultaneously achieves compression of the sealing element 22 when tightening the bolts 14. Brackets 23 are attached to the sleeve. The pipes 12 are provided with side filters 24.

Mobile formwork works as follows.

The required number of sections is installed in the bottom-hole part of the production using a special mechanism that moves along the monorail in the joint part of the section, using a crepe-laying machine or a transfer valve mounted on the drilling or loading machine. Then, the formwork is constructed using known methods and the gaps between individual sections 3 and parts 4-7 of the mobile formwork are caulked. In the post-storage space 25 is pumped through the holes installed in some

11 are the cement-sand mortar 12, and then the wells are drilled and cement mortars are injected into them.

Drain pipes 12 are installed in advance into the remaining holes 11. The number of pipes is determined by the holes in the formwork, which are evenly distributed over the area of the formwork at the rate of one hole 0.5-1 of the forming formwork wall. Before installing in the holes II, the drain pipes 12 are equipped with a side filter 24, which is used as a grid of any materials, technical paper, fabric materials, etc. The movable 17 and stationary 16 sectors of the bottom filter of the pipes 12 installed in the roof of the formwork are aligned so that approximately half of the internal cross section of the tube remains free. The length of the pipes 12 is determined by the largest value of the fixed voids in the conditions of a specific mining process, i.e. it is variable for different mining and geological conditions and workings. Branch pipes

12Inserted as far as possible into the rock and fixed with the help of stop bolts 14, located in brackets 5, bushings 21 and screw 20.

The fastening of the nozzles 12 in the hole x 11 formwork (Figures 2, 3 and 6) takes into account the variable value of the backfilling space, and its details

13 and 14 are used to connect the discharge hose during the injection of reinforcement solutions into the cracks of the rock mass. The need for drilling wells, holes for cementing and drain pipes and blasting at the bottom of the formwork makes it impractical to use progressive threaded connections of stop valves to these holes.

A hose is connected to the lower end of nozzle 12 to drain the hardening mixture filtrate. As the hardening mixture is pumped into the filler space and the arched part of the excavation is filled, the excess water is filtered through the nozzles 12 and the air is pressed out. The appearance of a hardening mixture from the pipes 12 indicates that the plant is completely filled.

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regen emptiness arch part of generation. At the same time, turning the lever 18 closes the bottom opening of the nozzle 12 and pressurize the pump to add pressure to further filter out the liquid phase from the hardening mixture and seal the solid phase. The magnitude of the overpressure is determined by the bearing capacity of the formwork.

If in the domed part of the development of the highest point of emptiness is

at some distance from the drain pipe 12, then a piece of hose is put on its upper end and guided to the highest point of the fixed space. This operation is performed through the face space prior to installation of the formwork in it.

Drain pipes 12 are removed from the holes 11 after the loss of mobility of the cement mixture and in their place install the tube or plugs. Side feed 24 is cleaned of the hardening mixture or replaced with a new one. The permeability of the parts 16 and 17 of the bottom filter is also restored, after which the nozzles -12 are used for

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The use of the proposed formwork allows a 1.2-1.5 times increase in strength of the inner cladding-shell by eliminating

5 layering the cement mixture and filtering out water that is not involved in the hardening process. In addition, the disintegration of rocks is excluded, in the places of installation

The 0 nozzles remain uncrowded cups of the well bore, through which further wells are drilled to inject cement grout into the cracks of the rock formations.

Claims (1)

1. Formwork for erecting underground underground workings, including a framework with wall-forming walls, having holes for installing cement and drainage pipes, about which. that, in order to increase the density and strength 5 of the lining being created, due to the adjustable filtrating of the filtrate supplied from the formwork space for the hardening mixture, drain 11 cpus.f eleven suui l 23 2f "L 2t 72 31 1c fff eri. five Suffr uff-g r 73