SU934026A1 - Moving form for erecting monolithic trips - Google Patents

Description

 one

The invention relates to the coal industry and can be used in the protection of reservoir workings with monolithic strips of a quick-hardening mixture.

A number of mobile formwork structures are known, used for laying strips in the worked-out area of lava and for protecting workings.

Known mobile formwork for the construction of quarry strips of hardening mixture, including rigidly interconnected front and side protective shields and means for shifting the formwork 1.

The closest in technical essence and achieved results is the design of a mobile formwork for the construction of monolithic strips, including a frame, shields, means for moving and a pipe for feeding concrete 2.

The disadvantage of the structures is that it does not provide for the possibility of laying over the concrete strip a compliance element, which can be made in the form of a wooden strip laid between the concrete strip being erected and the roof of the formation.

The purpose of the invention is to provide opportunities to create a pliable monolithic strip.

The goal is achieved by the fact that the mobile formwork for the erection of monolithic strips is provided with wooden bars located above the formwork, while the pipe for supplying concrete is located B of the middle part of the side formwork at the roof of the formation, in addition, the formwork itself is detachable from the end, The vehicle is made in the form of a hydrojack and a hydrostreet.

FIG. 1 shows a mobile formwork, a general view; in fig. 2 - the same, top view; in fig. 3 - the same, side view.

The formwork includes two frames 1 and 2 Poobrazny form. One of them is installed on the soil of the reservoir and is the basis for hydraulic spacer racks 3, the second one serves as a common top plate for the same racks.

Claims (2)

The space between the uprights is covered by a housing consisting of shields 4 and 5. Shield 4 is fixed along the entire perimeter of the formwork to the rack housings on the inside. The shield 5 is attached to the upper frame 2 and, together with the sliding part of the stand, can, depending on the thickness of the formation, rise or fall. Both the shield and the upper frame in the end part are made detachable. Their connection is made before filling the filling space with hydraulic locks 6 and 7 located: one in the upper part of the shield 4, the other on the frame 2. The locks allow for a slight sliding. A dry hardening mixture is fed over the formwork through pipe 8, where it is displaced with water. A hardening mixture can also be supplied through this pipe. The fence of the strip above is a wooden cushion 9, which is laid before the mixture is fed into the formwork. The job of laying a monolithic strip is carried out as follows. Before supplying concrete, the diluted shields are closed at the end by means of hydraulic locks, and a wooden lining 9 consisting of is laid on the formwork. from the individual beams, which is hydraulically supported and the frame 2 is pressed against the roof. A mixture is then fed through pipe 8. After filling the formwork space, the thrust is removed from the girders and the hydrolock is used to open the formwork and detach it from the solidified mixture. The formwork detachment process is also carried out by lowering the upper shield, which at this time acts as a wedge between the lower shield and the strip. The formwork prepared for shifting with the help of a hydraulic jack 10 mounted on the pedestal 11 (satellite support) is moved to a new place. The laid wood laying remains in the concrete strip between the roof and the concrete. If necessary, an organ support can be installed on the side of the goaf. The above work cycle repeats as the cleaning face progresses. The use of the proposed formwork with a pliable element will avoid significant stresses in the monolithic strip, especially during the initial period of hardening of concrete (anhydrite), and this will preserve the integrity of the strip and its strength characteristic in the zone of steady-state rock pressure behind the lava, thus avoiding the costs associated with additional measures to preserve the protected mine. Thus, the use of the proposed formwork will reduce the complexity of work in general for the protection of production and reduce the cost of work to maintain it. Claims of mobile formwork for erecting monolithic strips, including a frame, a shield, means for moving and a pipe for supplying concrete, characterized in that, in order to increase the technological capabilities of the formwork by allowing the creation of a ductile monolithic strip, the formwork is fitted with wooden bars located above the formwork, while the pipe for supplying concrete is located in the middle part of the side formwork at the roof of the seam, with the end part of the formwork made detachable, and the means for moving or it is designed as a hydraulic jack and a spacer gidrostoyki. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 617613, cl. E 21 D 11/10, 1978. 2. Patent of Great Britain No. 1378849, cl. E 21 D 11/10, published. 1974 (prototype). FIG. g ig.Z eight /