SU972120A1 - Power matching support for two-layer excavation - Google Patents

Description

(54) MECHANIZED CREW FORMING FOR TWO-LAYER EXTRACT

one

The invention relates to mechanized supports and can be used to maintain the interface between lavas and drifts in a two-layer voyage of gentle seams of mineral deposits with an interlayer pack.

Known mechanized lining for two-layer coal excavation, including overlaps with hydraulic legs, movement mounts and a sliding guard, hinged on the ceiling 1.

The disadvantage of this support is deformations of the overlap and fences during large-block roof collapse.

The closest to the technical essence of the known is mechanized lining, conjugated for a two-layered recess, including external and internal sections connected to each other by means of overhead jacks, containing pairs of hydraulic rails and overlaps on which sliding barriers 2 are hinged.

The disadvantages of this support are high loads on the fences of the section when the roof is lowered and, as a result, the expansion of the cylinders of hydraulic posts, deformation of the floors and the break of the fences.

The purpose of the invention is to improve the reliability of the support when working on layers with an interlayer stack.

The goal is achieved by the fact that in the mechanized lining of an interface for a two-layer notch, including external and internal sections interconnected by upper jacks of movement, containing a pair of hydraulic posts of the ceiling, on which sliding barriers are hinged, they are made of longitudinal beams with vertical brackets on downhole ends for connection with overlappings and retractable supports 15 with hydraulically supported posts on the embankment ends, while the height of the brackets is more removed. about slo

FIG. 1 shows the proposed joint support, side view; in fig. 2 - the same view from the scoop.

20

Mechanized lining of mating in a two-layer excavation of flat seams with an interlayer pack includes three sections of a supporting-protective type.

The supporting part of the lining, consisting of the tops 1 and 2, hydraulic posts 3 and jacks 4 of the movement of the lining, is mounted on the mating of the upper layer's lava with the drift. Fencing overlaps 5, which are welded beams reinforced with stiffening ribs, overlap the flat working space of the mating of the lower layer's lava with a shield below the roof level of the interlayer pack. On the one hand, the fencing overlaps 5 are hingedly connected to the top 1 of the supporting part of the lining by means of brackets 6 rigidly connected to the fencing overlapping, and on the other hand they are supported on the retractable supports 7 with the hydraulically adjustable 8, which allow to adjust the angle of the overlapping of the overlapping. The cylinders of the jacks 4 of movement of the bottom face lava face conveyor belt, which are simultaneously used as auxiliary jacks of the support support, are pivotally attached to the bases of the sliding supports. The shifting of the support is carried out from the control unit located in the area of the supporting part of the support, and is performed as follows. Hydraulic legs of any extreme section are unloaded. In order to prevent the collapsed rocks located on the enclosing ceilings from entering the working area of the mating, the enclosing overlap is lowered by an amount not exceeding the thickness of the adjacent enclosing overlap.

At the same time, the jacks for moving the section and moving the bottomhole lava conveyor belt are turned on.

In this case, the downhole lava conveyor of the lower layer is kept from being moved by two jacks to the movement of the conveyor of adjacent sections.

After the end of the first extreme section has been completed, the second extreme section is moved, and then the middle section is moved.

The proposed mechanized lining of the mate can be used for two-layer excavation of shallow mineral layers, leaving an interlayer pack.

Rocks of the roof behind the lava support of the upper layer are crushed with slabs whose dimensions along the lava considerably exceed the width of the excavation at the interface. As a result, during the landing of the roof, the rocks will collapse on the interlayer pack and only then, by grinding, load the fencing of the support.

In addition, the line of collapse of the roof in the lava of the upper layer and on the interface is aligned, therefore, the need to fasten berm zones is eliminated.

Thus, the reliability of the support and the safety of its service are improved.

Claims (2)

1. Grafov LB. The direction of the integrated mechanization of the development of steep and inclined layers. M., “Nedra, 1974, p. 85. 2. Petrovsky B.I. et al. Investigation of the occurrence of rock pressure in four combine lavas “Potash industry, 1979, No. 1, p. 28 (prototype).