RU1770577C - Lock for yielding road support - Google Patents

Abstract

Usage: the maintenance of the excavation sites in the preparatory workings bonfire support. SUMMARY OF THE INVENTION A method of constructing a bonfire of flexible ring elements with an inner ring opening includes laying the ring elements on top of each other to form a container, filling it with filling material, creating a spacer between the upper container and the roof, and coating the ring elements with a fire fighting compound. The container is filled as the next ring element is installed. After filling each annular element, the filling material is compacted and refilled. The spacer between the upper tank and the roof is created by the last annular element, in which two holes are made in the side track and in the upper side wall before installation, flattened on the side of the sidewalls, fixed in the flattened state, placed in the underroof gap, released from fixation and through the hole in a treadmill, pulp is pumped into the inner cavity. Air is vented through an opening in the upper sidewall. 2 ill. THX

Description

The invention relates to mining, and in particular to a technique for building bonfires at the preparatory workings of excavation sites and under the mouths of rising degassing wells in a pillar development system, when the wells are left connected to the local gas pipeline in the worked out space.

A known method of building a fire from flexible annular elements with an inner annular opening, which consists in constructing a container of individual elements, compressing it from

roofing to the soil with air balloons, filling the reservoir with rock, and sealing the under-roof gap with timber (ed. St. USSR No. 7357 & 7, class E 21 D 15A8).

The disadvantage of this method is the additional cost of sealing the under-roof gap with timber.

The aim of the invention is to reduce the consumption of timber during the construction of a fire.

The goal is achieved in that the filling of the tank is carried out as you install the next ring h vi

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of the first element, after filling each annular element, the filling material is compacted and refilled, and the spacer between the upper container and the roof is created by the last annular element, in which two holes are pre-made in the treadmill and flattened on the side of the sidewall, fixed in flattened state, then placed in a subroofing gap, released from fixing and through the hole in the treadmill pumped into the inner cavity of the pulp, bleeding air through the hole in the upper its sidewall, which after completion of the injection is plugged.

The collateral method makes it easy to seal the near-track strip erected from the tires over the entire height between the roof and the formation soil without sealing the under-roof gap with timber.

In Fig. 1 (view from the drift), on the left is a finished bonfire, and on the right is a bonfire in the final stage of construction; Fig. 2 (also a view from the side of the preparatory excavation) shows both bonfires erected; further, here, pulp injection technologies into the uppermost element and the location of the sealants in the joint between the bonfires are shown.

In Fig. 1, the finished bonfire on the left consists of separate flexible ring elements 1 with internal annular openings, the sides of which, apart from the last element 2, were laid apart before being laid into the bonfire and struts 3 were coaxially mounted between them, as shown on the fire on the right. Elements 1 with spacers 3 are stacked on top of each other and individually and individually and individually and individually filled with rock L, compacted in series, refilled and also alternately. B-subroofing gap (bonfire on the right) is inserted into a flattened and stitched cord from the sidewalls of the usual empty element with 5 inserts in the loop x 6 of the seam. Then, the seam loops 6 are cut and, when the element 2 is straightened and creates the initial spacer in the under-roof gap, they proceed to fill it with filling material. Element 2 on the outside in the treadmill and at the top.

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the sidewall contains pre-divided openings 7 and 8. The pulp 9 is pumped into the hole 7 (FIG. 2), air is blown through the hole 8. The pulp 9 is filled with the last element 2 using a tank 10, from which the pulp 9 is forced out with compressed air through a hose 11 inserted in the hole 7 into the internal cavity of the element 2. After filling the last element 2 with the pulp 9, the hose 11 is removed from the hole 7 and plugged this hole is a stopper 12, so it is shown on the upper element 2 in figure 1 (bonfire on the left). And then (see Fig. 2), the gaps between the bonfires are plugged with scraps of elastomer, for example, foam rubber 13, after which the near-track strip will become airtight, air leakages through it will become practically zero. Bonfires are covered with a fire-fighting solution. The scraps of foam rubber 13 are lubricated with a chloride-clay paste. In the first, second, and even in the third elements from below, the backfill is compacted, for example, with a jackhammer containing a blunt peak with broadening at the end. f Additionally, if the rock is prone to swelling, it is poured with a pulp containing water and a bayonet, or simply wet the rock and bayonet in the cells with water.

In the upper elements where it is not possible to compact the rock with a jackhammer, the rock is compacted only by moistening with the addition of a substance increasing in volume, or without adding them if the rock is prone to. swelling. It is possible to do without a jackhammer if the wetting of the swellable rock and the bayonet is sufficient to compact the filling material. The combination of compaction means is dictated by the specific conditions and the purpose of the guarded mine or the degassing well left in the mined space. The pulp 9 for the uppermost element 2 may consist of a solution of phosphogypsum mixed with a coal pit, a cement-sand mortar with additives, an aqueous clay solution with a coal pit, etc.

The described method allows to practically eliminate the consumption of timber during the construction of bonfires with a high degree of compaction of filling material 15

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