SU1208256A1 - Composite yieldable mine support for horizontal and sloping workings - Google Patents

Description

This invention relates to the mining industry, in particular to horizontal supports; and inclined mine workings.

The aim of the invention is to increase the compliance of the support in the longitudinal direction while increasing its carrying capacity.

FIG. 1 shows the plot production, fixed the proposed lining; in fig. 2 shows section A-A in FIG. one; in fig. 3 - segment of the lagging support.

Conical rings lining assembled from segments of constant thickness 1, between which are placed compliant gaskets 2. On the side of the narrowed part of the ring that goes inside the excavation, the segments are reinforced among themselves, for example, using metal pin with heads 3 and patch slats 4. In this case slats are provided in the slats that do not prevent the segments from moving into the ring due to the yielding of the straps. The end portions of each segment have unequal widths d and d, whereby the taper is ensured when assembling the ring support. Dimensions d and d are constructively selected depending on the required compliance of the lining in the longitudinal direction, due to the mining and geological conditions of the construction of the excavation.

Adjacent lining rings are overlapped with a combination of D in such a way that the inner surface of the truncated cone of one ring serves as a continuation of the outer surface of the adjacent ring along its entire length, and between the lining and the breeding contour of the working there is a fixed cement layer 5, made of low-modulus material, for example, from a sand-cement mixture with the addition of sawdust.

As the fence moves, the lining rings are positioned with a wide end in the direction of the bottom. In this case, the assembly of the segments in the ring is produced first in the soil of production and pumped into the castle part of the roof. Between the segments in the ring install a flexible gasket, and butt208256

Vivid seams of segments in adjacent rings displace ODE relative to another, while respecting the principle of stitching seams.

5 The location of the rings by the wide part of the cone in the direction of the moving bottom creates a condition for a better sealing of the lining-buttering system, especially when blasting. Under the action of the blast wave, the closest to the bottom of the team lining rings are shifted and compacted in the overlapping parts of adjacent rings, the value of which is determined based on the specific geological conditions.

With the oblique action of the loads on the proposed lining, which take place in oblique tubes and when crossing the base rock, there is a shift

team rings lining along the longitudinal axis of production. When moving the rings one into the other, the wide end of the outer ring somewhat expands due to compaction of the fixed cement layer 5 consisting of a low-modulus material (a pliable cement mixture, which includes, for example,

30 sawdust). Constructive

feature of the proposed team cref

pi makes it maneuverable to the perception of external loads.

Flexibility is adjustable

J5 taper rings. When expected

large displacements along the development of the taper of the rings make smaller,; ensuring their mutual slippage in zone 4 of e When restricting re-Q4 of the rooms or when translating the support into rigid mode of operation, the taper of the rings is increased.

Under the action of rock pressure, the proposed prefabricated lining is tested.

j differs in unequal loads along the working length. On the combined sections of the rings, the load on the lining (q) is significantly higher due to the artificially created higher rigidity of the lining. In the intervals between these areas, the load on the lining is reduced to the values characteristic of the above tubing and panel lining (an approximate loading diagram of the proposed lining is shown in

50

55

FIG. one).

uz z

d

Compiled by L. Berezkina Editor N.Shvydka Tekhred O.Netse Corrector G. Reshetnik

Order 215/43 Circulation 470Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, Proektna St., 4

fig.Z

Claims (1)

COMBINED SHAFT MINING FASTENERS FOR HORIZONTAL AND TILTING MINING PRODUCTS, including reinforced concrete rings made of trapezoidal segments, sequentially installed in the longitudinal direction of the mine, a fixed cement layer, characterized in that, in order to increase the flexibility of the lining, while supporting it in the longitudinal direction , the segments are connected in a ring with the orientation of the larger base towards the bottom of the mine, forming a truncated cone, and adjacent rings are installed with ahlestom. Fig, 1 1,120