PL103142B1 - BOTTOM GLASS COVER - Google Patents

Description

The subject of the invention is mining shaft lining used not especially under the harsh conditions of hydrogeol especially when operating - folds contained in shaft filters. Housing according to the invention, it has a composite structure, it is useful and tight.

State of the art. There is a known mining shaft housing bow, characterized by a complex structure and tightness, which consists of two steel concentric cylinders from the measurement space between them filled with cement concrete. Cy¬ these linders consist of ring-shaped sections, welded between them both at the edges transverse and longitudinal. The buildings are sewn bu there is a hike to leave before sections of the casing connected on the surface.

This housing is characterized by insufficient susceptibility which is associated with the inability to explode of deposits located in the immediate vicinity these shafts, and this entails considerable losses of meat useful, reaching up to about 30%. Mon. moreover, this housing requires the use of a high degree of strength Corrosion-resistant tunnel steel sheets.

There are technological difficulties with its construction related to performance, especially for obtaining continuous and tight spa connections important, whose control in mining conditions it is especially difficult.

The essence of the invention. The subject of the invention is mining composite shaft support, including layer made of cement concrete. Being of the invention is that the housing is at least one element of a combination of at least two layers of which the outer layer is a breast shade of cementless concrete with a binder based of polyester resins, bonded to the inner layer which is a ring made of cement concrete.

A spring is built into the inner layer jace cables with embedded pipes.

The outer layer has a cooperation side with an inner layer of at least two technological recesses. Where the housing It consists of two and more elements indicated is when they are between its elements known fusing hinges, formed of two ring cups, lower and upper, tightly made of connected with each other, in horizontal walls which there are at least four holes spaced apart connected around the circumference of these dishes, intended for placing in them the ends of the prestressing cables.

The housing according to the invention, through its empowerment dating obtained thanks to internal compression layer, allows for failure-free work at reduced bending radii of the housing, at least less 3.5 times compared to known solutions tie. There is therefore the possibility of exploitation a deposit of useful minerals that have been imprisoned so far 103 142 ••; ..., .- 3, in the so-called shaft protection pillars, covering up to 30% of the total deposit.

Due to the fact that the strength of the crush inner layer material, compressed, increases no less than 80% compared to unreressed layer, previously used in known casings, it is possible to reduce the thickness of the housing, and this, as a result, today to reduce the necessary breach and sue la to reduce the cost of making deposits available. job as a composite structure of both hardened ones casing layers, outer layer with concrete and internal concrete cement of this, consists in overlapping them through the brain technological.

Thanks to this, cooperation of both layers is achieved consisting in moving them together under load, what the housing according to The invention differs favorably from the known conc layered structures, where the layers may be the ability to move in relation to each other. Over¬ it is the housing according to the invention that is characterized by full tightness ensured by tightness material of the outer layer, which eliminates the necessity of its sealing during operation, an expensive operation and not effective enough.

As a result, such a sealed housing improves the shaft operating, ventilation and air-conditioning lines of the shaft.

Due to tightness, costs can also be eliminated consumables related to energy expenditure the pumping of infiltrating waters, which is not a problem suitable when using known housings. Applicable important material for the outer layer of the housing significantly reduces its exposure to the effects of corrosion, which has a beneficial effect on its durability and also lowers operating costs.

Explanation of the drawing. The subject of the invention is shown in two embodiments in the drawing in which fig. 1 shows one- elemental housing in the longitudinal section, and Fig. 2 is a two-piece housing, also half longitudinal section.

Implementation examples.

Example I. The first example solutions does not present a housing made of one element nontu, consisting of an outer layer 1 having the shape of a ring, made of concrete with polyester binder and internal the same shape of the outer layer 2, made of made of cement concrete with the use of cement Portland mentality.

They are made of technology in the outer layer 3 chambers, arranged around the perimeter on inner surface of layer 1, / filled material of the inner layer 2. Inside layer 2 are embedded with embedding pipes 4, in which there are tensioning cables 5, which tension was applied using bolts 6 and two the washer 7, in the form of flat rings, is used tucked at the top and bottom of the inner layer 2. Outer layer 1 The housing is at the bottom shaped as a shaft foot 8, embedded in the rock mass 9.

The housing according to the invention is manufactured on the basis of steppe. First, the exterior is built up 142 '¦¦ 4 layer 1 by filling with the boarded diaphragm shafts with sections matched to the existing shafts length of mining marches, from the semi-liquid masses made of cement-free concrete. After hardening the stitches 1 are performed, also in sections, by means of a pouring with cement concrete, inner layer 2, after prior formwork of the transitional space marked to be filled, with simultaneous assembly socket for tubes 4 and tension cables 5.

After complete setting, the cement is suitable the inner layer 2 by tightening it sruli 6, wound on the threaded ends of the cables: and leaning on the washers 7. When done cladding of layers 1 and 2, consisting of of the materials to be changed, the tension of the cables 5 amounts to at least 1,200 kg / cm2.

As a result of the activities described, we obtain a set of shaft area, mining support, flexible and tight especially in operating conditions pane.

Example II._ The second example solutions does not present the housing according to the invention, composed of two basic elements, identical to the element described in the first example, with the difference that the outer sta 1 does not have shaft foot 8 and is not applicable washers 7 for bolts 6.

In place of the highest receipts expected consumables, between both elements housing is known in the mining industry the inflating joint in the form of a tightly west two ring-shaped bowls wearing each other, upper bowl 10 and lower bowl 11, representing at the same time a tensioning frame for the springs cables 5. In the horizontal walls of the dishes 10 and 11 are specially made holes, arranged symmetrically on the perimeter in which they are seated Prestressing cable terminals 5 twisted with screws 6.

Housing elements are made in the same way as the element described in the first example. Upo- the auxiliary joints are mounted in the usual way, then tensioning cable 5 is stretched across the hole turning the screws 6 for the horizontal walls, time 10 and 11. 45 The housing obtained is characterized by its flexibility tightness and is intended especially to difficult accompanying mining conditions exploitation of shaft pillars. 50

Claims (2)

Patent claims 1. Composite mining shaft support, containing a layer made of cement concrete, 55 characterized in that it is at least one element composed of at least two layers (1, 2), the outer layer (1) of which is a cementless ring. concrete with a binder based on polyester resins, bonded to the inner layer (2), which is a ring of cement concrete, in which the inner layer (2) is embedded in the tensing cables (5) with - with pipes (4), while the outer layer (1) has at least two technological recesses on the side cooperating with the inner layer (2) (3> "* 103 142 2. Mining shaft support according to claim A method according to claim 1, characterized in that between the elements of the casing there are known inflating joints, formed of two annular bowls (10, 11) in horizontal walls of which there are at least four openings arranged on the circumference of these bowls (10, 11 ), designed to accommodate the ends of the cables (5). PU. and Fig. 2