SU635248A1 - Method of developing and mining formation of thin steep seams disposed to sudden outbursts or rock burst shocks - Google Patents

Description

The invention relates to the field of mining, more specifically to the development of extremely hazardous formations, and can be used in the development of a suite of thin steeply dipping layers, prone to sudden outliers.

A known method for treating thin steeply dipping outburst-release formations is based on unloading the formation by forming a discharge cavity 1.

However, this method is ineffective due to its high labor intensity, leading to a decrease in the rate of mining work.

There is also known a method for preparing mining of outburst-hazardous formations, based on penetration of central main and flank ventilation shafts, standard stone-hulls and preparatory workings, with development of floors in descending order, AND.

Using this method is impossible without special labor-intensive measures to prevent sudden outliers and rock bursts on each layer 1 in the formation.

The aim of the invention is to increase the efficiency of preventing gas-dynamic effects by fully utilizing the protective effect of mining operations on the overlying levels.

This is achieved by hem, that the central main barrels pass through the entire depth of the mine floor, followed by a corner, the flank ventilation barrels pass to the level of the upper storey shaft, the lower exhaust shaft leads to the technical border of the mine floor, then from the opening workings to the mine floor boundaries along the strike of each stratum, crossworms pass and are connected by flanking slopes with flanking shafts through flanking squares, and in the center of the mine floor drifts are connected by central coal-bearing The slopes with the main trunk are through the lower floor crosscut, the mining floor is maintained in ascending order, and the flooring is conducted from the edges of the mine floor along the strike with preservation of the ventilation drift.

Bah fig. 1 shows a diagram of mining operations in oxonometry; in fig. 2 - scheme to open the mine floor, a vertical section.

This method is as follows.

The field is opened by one or two central i and two flank 2 dumps with storey cuts 3. The central trunks 1 pass to the technical boundary of the mine floor by the fall of the layers, and the flank 2 - to the mark of the upper storey creschlag 3. From the central trunks 1 by the main floor crosscut 4 open up all the layers through which drifts 5 pass through the entire length of the mine floor, as well as in one central coal tunnel 6 and two flanking ventilation slopes 7 to the height of the floor. The ventilation slopes 7 pass to the cross-pins 3 from the flank trunks 2.

From the flank slopes 7, the striking faces 8 are cut and worked in the direction from the mine zero border to the central trunk 1 by strips along the stretch with a ventilation drift behind the clearing face and using it as a haul when working the next strip but the rebellion. The strips work out on the entire formation, in an upward order, without leaving pillars coal. When mining the upper lanes, the coal is fed to the main horizon along the central coal-discharge slope 6, the materials for driving drifts are transported along the flanking slopes 7.

This method allows to prevent gas-dynamic manifestations due to the removal of deposits from all layers, except one, to the full height of the clearing face and the absence of the most dangerous with respect to the gas-dynamic manifestations of tunic faces.

Claims (2)

1. Bobrov I. V. Methods for the safe conduct of preparatory workings on the nlasts, which are dangerous but sudden emissions of coal and gas, M., Gosgortekhizdat, 1961, p. 96 2. Garkavi SM and others. The search for effective systems for the development of steeply dipping seams of Donbass, subject to sudden outbursts of coal and gas. Scientific research in the field of abatement of sudden carbon emissions. M., Gosgortekhizdat, 1958, p. 274-288. ipuz. one