SU881334A1 - Yielding support for preparatory workings - Google Patents

Description

(54) SUPPORTING FASTENING FOR PREPARATORY.

DEVELOPMENTS

I

The invention relates to the coal mining industry and can be used in 1production industries.

The known metal arched malleable, with connecting elements, which has a significant drawdown due to the mutual friction of the struts and the arch with a uniform rock pressure (1.

Under the influence of pressure generation, which is uneven in pressure, from the two bottom faces, one side of the arch, and then the second, sags first. Alternately, the drawdown in the subordinate links is strong, leads to the fact that the arch is deformed, the collapse of the connecting clamps, after which the support can not be removed. The loss of metal lining is 80 QO / o. The extracted metal lining is difficult to issue on the cluttered equipment workings.

The purpose of the invention is to reduce the cost of fastening mine workings by reducing the loss of metal strong supports from uneven rock pressure.

The goal is achieved by the fact that the connecting elements are made in the form of plates of polygonal concrete bentites enclosed in metal formwork

With interrelated elements and compressive elements.

The compressive elements are made in the form of bolts, and the concretes are diamond-shaped with holes for the installation of bolts.

The mixing elements are made in the form of grips and protrusions located at opposite ends of the formwork.

FIG. 1 shows lining, general view; on fng. 2 - separate bentonite assembled.

Malleable for preparatory support

The workings are assembled from individual Betonites 1 of rhombic form, pyramidal supports 2 and wedge arch lock 3. Rhombus bentonite 1 consists of artificial rhombic stone 4 with openings and metal formwork 5 compressed with bolts IS 6. Each plate of metal formwork 5 has a grip 7 and protrusion 8. The pyramidal supports comprise guide grippers.

Prior to the beginning of the impact of full-scale operations, the lining worked out is in a statistical position.

The approaching clearing front of the first along the lava exerts increased rock pressure on one of the halves of the arch, from the center of the wedge arched lock 3. Diamond-shaped concrete bentons 1 give a gradual subsidence along the wall of the excavation adjacent to the first lava. The passage of the clearing front of the first lava increases the drawdown of the concrete I, presses the pyramidal support 2, as the roof collapses in. developed space of lava. The approach of the sewage line of the subsequent lava causes identical subsidence of the second half of the arch support. After the passage of the cleaning line of the second lava, the lining completely sags. The use of this design of compliant support for preparatory workings allows to reduce the cost of maintaining, dispensing support elements and replacing metal arch support that is not adapted to variable pressure of cleaning operations.

Claims (3)

1. Compliant lining for preparatory workings, including connector- | 4 1. Geneskul MN and others. Reference book on the use of mine workings. M., “Nedra, 1972, p. 32. elements, characterized in that, in order to reduce the cost of fastening mine workings by reducing the loss of metal arch support from uneven rock pressure, the connecting elements are made in the form of polygon-shaped concretes plates enclosed in metal formwork with interlocking elements and compression elements. 2. A support according to claim 1, characterized in that the compressing elements are in the form of bolts, and the concrete parts are diamond-shaped, with holes for the installation of bolts. 3. Bundle according to claim 1, characterized in that the interconnecting elements are made in the form of grips and protrusions located at opposite ends of the formwork, the sources of information taken into account during the examination