SU1671875A1 - Metal props for preliminary drifts - Google Patents

Abstract

The invention relates to mining and m. used for fixing workings. The goal - reducing the complexity of the construction of lining. The tops and racks 2 are knotted into the frame by nodes of compliance. To fix the tops on the special profile of the frames / CP /, there are rigid assemblies, each of which contains a bracket 8, nuts 9 and basket-shaped strips / П / 6, 7. The upper side is made in the form of a cylindrical dome with a corrugated surface G / 5 in the form of the inner surface of the CP. On both sides of D 5 there are symmetrical holes for tightening P 6, 7 with a clip 8. Upper to D 5 is installed inside the CP. One of the P 6 interacts with the outer surface of the CP, and the other P 7 interacts with the inner surface of G 5. At this, the bracket 8 is passed into the holes of P 6 and 7 and the corrugated surface. Under the influence of forces resulting from deformations and displacements of the rocks of the contour of generation, the support works in a compliant mode due to the creep of the SR in rigid nodes. 5 il.

Description

bb 8 7

O v

00

Vi ate

FIG. five

The invention relates to mining and is a metal arch support with a top of corrugated cylindrical vault and pliable racks. which can be used in preparatory workings in the combine method of conducting.

The aim of the invention is to reduce the complexity of the construction of the lining.

Figure 1 shows the lining, section; figure 2 is the same, side view; on fig.Z - lining folded for transport and installation; figure 4 - section aa in figure 1: figure 5 - section bb in figure 1.

The support consists of an overlap 1. made in the form of a cylindrical arch with a corrugated surface, which is at the same time a supporting, protecting and connecting element in the support, racks made of curvilinear segments of special profile - upper 2 and lower 3, connected by locks 4, allowing for compliance of the structure . In order to ensure sufficient reliability in terms of stability in the longitudinal direction, the required bearing capacity of the lining and the possibility of changing the step of installing sections, the corrugations 5 in the middle part of the overlap 1 have a special profile 2 that is increased in height and width in the form of the internal cross section.

The locking device includes two trough-shaped strips: the upper b, which covers the profile of the pillar 2, and the inner 7, as well as brackets 8 and nuts 9. Moreover, one of the trough-shaped strips 6 interacts with the inner surface of the special surface of the racks 2 with the outer surface and 7 with the outer surface. with the inner surface of the corrugations 5 of the ceiling overlap 1.

The erection of the support is carried out by hydraulic manipulators installed on the heading machine as follows.

Previously, on the mounting table, which is in working out outside the working area of the tunneling equipment, the upper c-overlap together with the uprights are folded in the folded state into a section (FIG. 3). Further, the support section with the aid of a suspension trolley is delivered along a monorail over an excavating machine to an installation bridge in a working face. At the bottom of the production, the support section is picked up by the hydraulic manipulator, lifted to the roof of the production and joined to the previously installed support section of the corrugated sections.

with a specific gripper 10, designed for a given fastening density.

After that, the sections are loosened and the racks 2 and 3 are lowered into the working position as

shown in Figures 1 and 2, and then tightening the nuts of the lock joints. This fastening cycle is repeated after moving the downhole to the next stop.

Under the influence of forces arising in

as a result of deformations and displacements of the formation contour rocks, the lining works in a compliant mode due to the slippage of elements 2 and 3 of the racks in the castle

compounds 4.

The forces of reaction arising from the displacement of rocks, i.e. the resistance of the support is determined by the magnitude of the strength of the profile profiles friction.

As the supports are compliant and, consequently, the cross section is reduced in size, its carrying capacity remains approximately constant.

thirty

Claims (1)

Invention Formula Metal lining preparatory workings, including frames from the top and racks connected by rigid assemblies having strips with holes for placing brackets and securing them with nuts, characterized in that, in order to reduce the labor-intensiveness of the erection, the lining, each upper side, is made in the form of a cylindrical arch with a corrugated surface having in the middle part a corrugation in shape the special profile of the frame, and on both sides of it - symmetrical holes, with the upper to the specified the corrugation is installed inside the special profile of the frame, and each rigid assembly has an additional bar with holes, both bars are basket-shaped and installed with the possibility of one bar interacting with the outer surface of the special profile of the frame and the other with the inner surface of the corrugations, while the bracket is missed in the holes straps with corrugated surface, 2 FIG. C