RU1796029C - Shield support for thick inclined and steep seams - Google Patents

Abstract

Usage: fastening workings in the development of powerful inclined and steep formations in the range of dip angles of 3075 ° . SUMMARY OF THE INVENTION: Shield supports include interconnected sections along a strike. Each of the sections consists of a shield, a base ski with a sector support, support legs and moving jacks. Each shield overlap is made in the form of an irregular triangular prism. Its long side face forms the inner supporting surface of the overlap, the short side is parallel to the base, and the outer surface of the third face is inclined to the base ski at an angle of 70-75 °. The angle between the base and the plane passing through the front support rib of the prism and the toe of the base ski is 80 °. 4 ill. ate with

Description

The invention relates to the mining industry and can be used in the development of powerful inclined and steep formations in the range of incidence angles of 30-75 °.

The purpose of the invention is to expand the range of application of the support in the angle of incidence of the formation and to ensure its movable ™, stability and safe working conditions at angles of incidence of 30-75 ° by changing the shape of the shield.

In FIG. 1 is a kinematic diagram of a roof support section; in FIG. 2 - lining section in the face, general view; in FIG. 3 - shield panel structure; in FIG. 4 - order and diagram of the extraction of coal under the shield support.

The shield support consists of separate sections interconnected along the base ski and shield panels through special locks 1 with chain holding ties 2 preventing the support sections from spreading along the strike of the formation.

Each lining section is made in the form of a panel cover 3 having the shape of an irregular triangular prism and hingedly connected by two support posts 4 and two jacks to move the panel cover 5 with the skis of the base 6 and the sector support 7 fixed to the skis of the base.

The blocking part of the panel cover freely lies on the sector support 7 and has the ability to progressively run on its outer surface.

From the side of the collapsed rocks of the worked-out space near the roof, a hinged visor 8 is installed on the shield floor, which prevents the collapse of the collapsed rocks into the bottomhole space.

The shield panel is a hollow prefabricated metal structure made in the form of an incorrect

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a triangular prism, the supporting elements of which are two side welded frames 9 of a triangular shape, interconnected by girders 10, a base plate 11 and metal sheets 12 and 13 by means of bolted joints. The pressure of the collapsed rocks is perceived by the side frames 9, the lower row of runs 10 and the flooring 14 of round wood laid inside the overlap across the strike of the formation.

The free space between the flooring 14 and the metal sheets of the sheathing 12 and 13 during the installation of the lining is filled with available improvised material (coal, wood, wood trimmings, garbage, etc.). The front part of the shield slab is equipped with a protective-shearing visor 1.5, which forms the front support rib of the prism and protects the shield overlap from deformation during the landing of the lining and blasting in the subroofing pack .- ::

- The design parameters and the shape of the constituent elements of the shield panel are selected so that the side face A (Fig. 1) of the prism in contact with the collapsed rocks forms an angle m equal to 65-70 ° with the skis of the base. which ensures optimum mobility and preserves the longitudinal stability of the lining in the range of dip angles of the formation of 30-75 °.

The prism face B is made parallel to the base ski, with a conditional plane drawn through the support rib

prisms (toe of the protective-clearing visor 13) and the toe of the base ski forms an angle of 80 °, which excludes the formation of a cleft face with an angle of inclination

v more than 70 °.

The design of the ceiling can be different, provided that its shape and the above parameters are observed.

Coal mining using a shield

The support is carried out as follows.

In the initial position of the lining section

supported by skiing grounds and front

overlap edge to the face.

Then, coal is removed by drilling and blasting at the bottom of the treatment face and loaded into a coal-blasting furnace. After shipment of coal, the remaining upper support pillar is removed. At the same time, with blasting in the upper support pillar, the lining self-lands along the entire front of the treatment face under the influence of the collapsed rocks of the working space.

After planting and airing, the chipped coal of the upper pillar is shipped.

At this point, the recess cycle is considered complete.

The proposed support can also be used for mechanized mining of formations. For example, as an aggregate support for the extraction of coal by mechanized units operating in a fall.

the use of conveyor type spheres. 1ASCHM.

Formulas of the invention

Shield support for powerful inclined and steep formations, turning off the interconnected support sections, each of which consists of a shield floor, base ski with a sector support, support posts installed between the base and the shield panel connected to the movement jacks, characterized in that . that, in order to expand the range of application of the lining according to the angle of pressure of the plate and to ensure its mobility, stability and safe working conditions at incidence angles of 30-75 °, each shield overlap of the lining is made in the form of an irregular triangular prism, the long side of which forms an internal abutment surface overlap, the short face is parallel to the base, and the outer surface of the third face is glued to the base ski at an angle of 65-70 °, while the angle between the base and the reference plane passing through Res front support rib and nose prism base ski, is 80 °.

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