PL185232B1 - Mining roof supporting system - Google Patents

Abstract

1 Mining support kit, including two telescopic hydraulic stand, longitudinal bar and floor foot, and made in various height versions, characterized in that the minimum heights (H) individual versions form arithmetic sequence (Hi; H2; H3), whose the difference (a) is half the hydraulic stroke (Si) the rack (11) of the first version and the value of the hydraulic stroke (Si, S2) of the stands (12, 13) of the second and the third version are equal to the minimum height (H2) of the second version of the set.

Description

The subject of the invention is a mining support set used in underground mining for supporting the roof of an excavation as an individual support, moved by means of other devices.

For example, from the description of the Polish patent application No. P253518, support sets are known, consisting of a hydraulic stand equipped with a canopy at the top and a foot at the bottom.

In practice, a two-telescopic stand is commonly used, equipped with tubular covers protecting the surfaces of both extendable piston rods. The ceiling board is made as an elongated, box-like structure articulated with the stand. The foot is in the form of a plate or a box, also articulated with the stand. The sets are made in various height versions, according to the needs of the mines. For each version, a different rack is made that differs in length and stroke value from the racks of the other versions. Hence, the variety of stands made is considerable.

The aim of the invention is to limit the range of manufactured sets while satisfying the existing mining needs - and all this with the use of racks from end-of-life casings.

The essence of the invention comes down to the production of supporting sets in three versions, the minimum heights of which create an arithmetic sequence with a difference equal to half the hydraulic stroke of the first version's prop, while the values of the hydraulic stroke of the second and third version's props are equal to the minimum height of the second version's set. Preferably, the third version stand has a tubular spacer permanently attached to the cylinder, and its length equals the arithmetic difference.

These relationships and proportions, determined by the appropriate equations, should be treated as approximate, and it is assumed that the deviations do not exceed 5% of one side of the equation.

Maintaining the above dependencies makes it possible to use the props of the FAZOS 70 type mechanized support, commonly used in mines, for the production of support sets. renovation. Such stands are used in the second variant. Worn stands are shortened and used in the first version, while the rest of the tube shortening are used as spacers in the third version stands.

An embodiment of a kit according to the invention is shown in the drawing, in which Fig. 1 shows the kit in side view, and Figs. 2, 3, 4 show sections of the stands of the first, second and third versions, respectively.

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The mining support set consists of a two-telescopic stand 1 connected to the canopy 2 by means of a joint 3 and to the foot 4 by means of a joint 5. The minimum height H is achieved by the set fully retracted 1. The maximum height is achieved by extending and extending the stand 1 by its size total stroke S. The sets are made in three height versions H>; H2; H3, and the difference between successive heights is a, which can be described by the relationship H3 - H2 = H2 - H {= a.

The difference a is equal to half of the hydraulic stroke Sj of the first version 11, i.e. a = 0.5 S>. The values of the hydraulic strokes S2 and S3 of the props 12 and 13 of the second and third versions are equal to the minimum height H2 of the second version of the set S2 = S3 = H2.

The stand 13 of the third version has a spacer 6 welded from below to the cylinder and only this element 6 of length a differs from the stand 12 of the second version.

The reason for the wear of the mining props is primarily corrosion in the area of the cylinder closing sleeves and slightly below. The rest of the rack areas are in good condition. Therefore, it is possible to continue using the stands after their shortening.

The stands 11 of the first version are made by shortening the stands 12 of the second version by the dimension a. The remaining stands, after the tube has been shortened, are used to make the spacer 6 of the stand 13.

As a result, the stands of the support units are made at a low cost, with the stands 12 of the second, most frequently used version being produced at the lowest cost.

The invention will be used mainly in renovation plants, as well as in mines with an appropriate renovation base, and the support sets made there will be used primarily in mines exploiting minerals with a chamber system, for which an individual support is planned.

f and g. 4

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Fig. 1

Publishing Department of the UP RP. Circulation of 50 copies

Price PLN 2.00.

Claims (2)

Patent claims 1. Mining support set, including a two-telescopic hydraulic stand, longitudinal canopy and floor foot, and made in various height versions, characterized in that the minimum heights (H) of the individual versions form an arithmetic sequence (Hi; H2; H3); the difference (a) of which is equal to half the hydraulic stroke (Si) of the prop (11) of the first version, while the value of the hydraulic stroke (Si, S2) of the props (12, 13) of the second and third versions are equal to the minimum height (H2) of the second version of the set. 2. The mining rig according to claim A device according to claim 1, characterized in that the third version stand (13) has a tubular spacer (6) permanently connected to the cylinder, and its length is equal to the arithmetic sequence difference (a) (Hi; H2; H3).