PL176167B1 - Cement charge for fixing anchor rods - Google Patents

Abstract

1. Cement charge for fastening anchor rods made in the form of an easily destructible container (2), containing a mixture (6) of quick-setting cement with additives and an internal container (3) containing mixing water, characterized in that the container (3) is divided into segments (5) by a series of partitions (4).

Description

The subject of the invention is a cement charge for fastening anchor rods used as a casing in mining excavations of underground mines, for securing the sides of opencast mines, as well as for securing damaged buildings and structures.

It is known in practice to provide a cement load for securing anchor rods consisting of an outer paper sheath containing a mixture of cement with fillers.

A cement load is also known, consisting of a paper or foil outer casing in which there is cement with fillers and a glass tube (glass cylinder) sealed on both sides containing water necessary to moisten the cement.

The practical application of the above-mentioned cement loads is associated with the following disadvantages:

- a cement load consisting of a paper cover and a mixture of cement with fillers, should be soaked in water for a strictly defined period of time before being put into the anchor hole in order to moisten the cement mixture to a specific consistency.

Too short time of soaking the load in water causes incomplete wetting of the entire volume of the cement mixture. Extending the soaking time causes the paper cover to get wet and it is impossible to install the load in the anchor hole.

The cement cargo, inside which, apart from the cement with the filler, is also a glass cylinder with water, is built-in by inserting it into a drilled hole in the roof of the excavation, and an anchor rod is inserted behind the load. The anchor rod is given a reciprocating movement with a drill in order to destroy the cement load and mix the cement, filler with water contained in the cylinder, and thus concret the rod in the hole.

The disadvantage of this solution is the fact that the reciprocating anchor rod inserted into the anchor hole in the roof of the mining excavation in which the cement load is located, destroying the lower edge of the glass cylinder with water, causes immediate leakage of the entire volume of water from the anchor hole in the down, not ensuring proper moistening of the entire volume of the cement mixture of the load and thus does not ensure proper concreting of the anchor rod in the anchor hole.

Due to the described disadvantages, the use of known structures of cement charges for fastening anchor rods has a limited application, and in practice these charges can be used for horizontal holes drilled in the sides of the headings or holes drilled downwards - in the bottom of the excavation.

176 167

The cement charge for fixing anchor rods according to the invention is an external, easily destructible container made of foil paper, polyethylene foil or other plastic filled with a cement mixture with filler and additives accelerating the setting of cement, and a small segment container also made of polyethylene foil or other material, in whose segments there is mixing water to moisten the cement mixture.

The use of the cement load according to the invention, in which the mixing water for moistening the cement mixture is contained in a longitudinally arranged segmented container, eliminates the described disadvantages and allows anchoring (concreting) of anchor rods in the roof openings of the mining excavation.

The subject of the invention is shown in the embodiment on the drawing showing the cement load in longitudinal section (Figure No 1).

The cement cargo (Figure No 1) - for fixing the anchor rods, is an easily destructible container 2 made of foil paper or polyethylene foil or other plastic. Inside the container 2 there is a mixture 6 of quick-setting cement with a filler (silica), additives accelerating the setting of the cement, and a small container 3, which is made of polyethylene film or other plastic. The small container 3 is divided by a series of joints 4 into segments 5, in which there is mixing water intended for moistening the cement mixture 6.

The small container 3, in the segments 5 of which there is mixing water, is joined (joined) to the large container 2. The cement load thus produced is fastened (sealed) with metal clamps 1 made of aluminum or copper sheet.

Publishing Department of the UP RP. Circulation of 70 copies. Price PLN 2.00.

Claims (3)

Patent claims 1. A cement charge for anchoring anchor rods made in the form of an easily destructible container (2) containing a mixture (6) of quick-setting cement with additives and an inner container (3) containing mixing water, characterized in that the container (3) is divided by a series of partitions ( 4) into segments (5). 2. A cargo according to claim The container as claimed in claim 1, characterized in that the container (3) is positioned along (axially) within the cement load. 3. A cargo according to claim The container (3) as claimed in claim 1, characterized in that the container (3) is coupled (coupled) to the container (2).