CS242597B1 - A method of creating an artificial ceiling for multi-sided mining of powerful seams - Google Patents

Abstract

The invention solves the problem of creating an artificial ceiling for multi-bridge mining of thick seams. The artificial ceiling in question creates a safe supporting surface that protects the workers of the lower bridge from falling rock and dumping of the foundation. Strips of sheet material oriented longitudinally with the pillar are rolled out onto the reinforcement elements and parts of their surface are bent vertically and fixed to the wall uprights, while when the reinforcement is moved, this bent part is folded onto the adjacent surface of the artificial ceiling, thereby overlapping the individual strips of sheet material.

Description

The invention solves a method of creating an artificial ceiling for the winding of powerful seams. The artificial ceiling in question creates a safe bearing surface that protects the lower gangway workers from falling rock by pouring the foundation.

Currently, artificial ceilings are created in several ways. The laborious laying of steel mesh with difficult jointing predominates. Furthermore, continuous wood surfaces, such as slabs, prisms, are often installed in several layers. To a lesser extent, an artificial ceiling is formed in the form of a separating layer, which consists, for example, of a mixture of fly ash and cement with a thickness of up to 0.5 m.

The aforementioned methods have a number of disadvantages, in particular in laborious and lengthy implementation, high material costs and in particular high demands for conveying large quantities of materials to the face. During the formation of the cave, the loose cone of the rock prevents the connection of another section of the artificial ceiling to the previous one.

The above-mentioned drawbacks are eliminated by the proposed method of creating an artificial ceiling according to the invention, which consists in that strips of flat material oriented longitudinally with the pillar are unfolded on reinforcing elements and vertically bent and fixed to the uprights of the face. this bent part is lowered to the adjacent surface of the artificial ceiling.

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The way of creating an artificial ceiling is; easy to implement and labor-saving. The vertical curvature of the strips prevents penetration of the cave-in rocks into the working area of the face, where these rocks impede the walking of workers.

The method is particularly suitable for the use of netting and mesh fabrics of plastic, where their dimensions, low weight and inertness to aggressive environments bring high savings in material transport, reduce labor and ensure stable functional properties over the entire life of the face.

The accompanying drawing shows an example of a method of forming an artificial ceiling according to the invention, in which Fig. 1 shows a view of the excavation and Fig. 2 shows a section of the excavation. The formation of the artificial ceiling is divided into the phase of laying the base frame of reinforcing elements 1 situated perpendicularly or with a certain deviation from perpendicular to the coal pillar / subsequent phase, when the reinforcing elements 4 are covered with a layer of flat fabric 2 or mesh. fasten to the uprights of the reinforcement.

Claims (1)

SUBJECT OF THE INVENTION Method for creating an artificial ceiling for multi-batch mining of powerful seams by overlaying individual strips of sheet material while securely securing the work in the lower gangway with reinforcement elements and sheet material, with the help of a lining reinforcement, characterized in that strips of sheet material oriented longitudinally they are bent vertically and fixed to the uprights of the face when the reinforcement and part of their surface are folded;