RU2235878C1 - Method for controlling primary caving of hard-destructible ceiling - Google Patents

Abstract

FIELD: mining industry.

SUBSTANCE: method includes performing preparatory mining, preparation of extracting column, driving of mounting chamber and mounting of mechanized system. During planning of shaft area extracting column is placed in such a way that geological disruption present on deposit was located near middle of extracting column. First, mounting chamber is driven near geological disruption on the side of lying side, disruption is opened and portion of column is extracted by mechanized system by straight drive. During these extracting operations and after primary caving of ceiling second mounting chamber is driven near geological disruption on the side of hanging side. After mounting of mechanized system in it and extraction of column by straight drive, disruption is opened and other portion of column is extracted by backward drive.

EFFECT: higher safety of primary ceiling caving.

3 dwg

Description

The invention relates to mining and can be used to control the initial landing of a hard-to-collapse roof.

There is a method of controlling the initial landing of a hard-to-collapse roof, including carrying out preparatory workings, preparing a excavation column, conducting an assembly chamber and installing a mechanized complex [1] - a prototype.

The disadvantages of this method are:

- coal losses in self-destructing pillars;

- initial mining of reserves from the border of the pillar to the self-destructing pillar using individual (wooden) lining.

The technical task was to develop a method for safe primary landing of a hard-to-collapse roof.

This goal is achieved by the fact that when cutting the mine field, the extraction column is positioned so that the geological disturbance existing in the field is located near the middle of the extraction column, first the installation chamber is carried out at the geological violation from the lying side, the violation is exposed and the part of the column is worked out by a mechanized complex in direct motion , during these mining operations and after the initial landing of the roof, a second installation chamber is carried out at the geological disturbance from the side of the hanging side, and after installing the mechanized complex in it and working out the pillar in direct motion, expose the violation and work out the other part of the pillar in reverse.

Introduced in the claims, such an essential feature as the fact that when excavating the mine field, the extraction column is positioned so that the geological disturbance existing in the field is located near the middle of the extraction column, creates favorable conditions for the initial landing of the hard-to-collapse roof when the mechanized complex moves from the geological violation from side of the lying side, and then from the hanging side and the already set roof.

An essential sign that the installation chamber is first carried out at a geological disturbance from the lying side and exposes it, makes it possible to use the disturbance plane for an earlier primary landing of a hard-to-collapse roof without dangerous consequences.

The sign that a part of the column is being worked out in direct motion creates a reserve of time during which a second mounting chamber is carried out and a mechanized complex is mounted in it.

An essential sign that the second installation chamber is being carried out at the geological disturbance from the side of the hanging side and exposes it, allows you to use the resulting free space after the initial collapse of the rocks behind the geological disturbance to safely collapse the roof when excavating another part of the column.

The method of controlling the initial landing of the roof is illustrated by drawings, where Fig. 1 shows in plan a section of a mining column with a geological disturbance; figure 2, 3 is a section aa in figure 1 with a different arrangement of mounting chambers.

Symbols adopted in the drawings 1 - excavation column; 2 - ventilation drift; 3 - conveyor drift; 4 - geological disturbance; 5 - mounting chamber; 6 - a pillar of coal; 7 - complex.

The method is as follows. The extraction column 1, contoured by the ventilation drift 2 and the conveyor drift 3 when cutting the mine field, is positioned so that the geological disturbance 4 is near the middle of pillar 1. The mounting chamber 5 for working the pillar in direct motion is located directly at the geological disturbance 4, leaving a small pillar 6. After installation of complex 7, before the start of its operation, the left pillar 6 is destroyed, exposing the geological disturbance 4. If this violation was located at an angle to the extraction column, then at The development of complex 7, it is first deployed in the plane of the reservoir. After some departure of the complex - direct, if there was one, and then the main roof collapses. According to this method, the primary collapse step does not reach critical values for complex 7, since the rocks of the roof have one exposed plane — geological disturbance 4. With further movement of complex 7, the collapse step is established, and it does not exceed the size of the primary one. To work off the column in reverse from a geological disturbance 4, an assembly chamber 5 is carried out in the same way for the violation, mount the mechanized complex 7 and, after working off the pillar 1, put it into operation in direct motion, having previously destroyed the entire pillar of the geological violation.

The advantages of this method are:

- elimination of coal losses,

- safe primary landing of a hard-to-collapse roof.

Sourse of information

1. USSR author's certificate No. 1184941, E 21 C 41/04, 1985

Claims (1)

A method for controlling the initial landing of a hard-to-collapse roof, including carrying out preparatory workings, preparing a excavation column, conducting an assembly chamber and installing a mechanized complex, characterized in that when excavating the mine field, the extraction column is positioned so that the geological disturbance in the field is located near the middle of the excavation column, first carry out the mounting chamber at the geological disturbance from the side of the lying side, expose the violation and work out part of the table and direct the course of the mechanized complex during these mining operations, and after the initial planting of the roof is carried out a second mounting chamber in the geological fault on the part of the hanging wall, and after installation it mechanized complex and mining pillar forward stroke bare breach and fulfill the other part of the column retraction.

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