SU1305386A1 - Method of preventing sudden outburst of coal and gas in steep seam mining - Google Patents

Abstract

The invention relates to the mining industry and m. used to prevent sudden emissions of coal and gas in mines that develop steep seams. The goal is to increase the effectiveness of prevention, sudden emissions by taking into account the degree of discharge of the coal seam along the height of the excavation block and the expansion of the field of application by using it for panel coal extraction. The extraction block, adjacent to the spent block, is opened with an industrial excavation tunnel. A field drift is conducted as a mine work. Then a waste-hazard zone is determined and discharge slots are formed from the industrial envelope at the border of the excavation unit. The first groove is formed with a height equal to two-thirds of the height of the excavation block, and is arranged perpendicular to the field drift. The other grooves have a fan at an angle of 10-11 & to the first groove and to each other. This angle provides an increase in the number of grooves in the lower part of the outburst zone. The formation of grooves can be carried out in various ways, such as leaching. 1 il. i (L el 00 00 05

Description

113

This invention relates to the mining industry and can be used to prevent sudden outbursts of coal and gas in mines that develop steep seams.

The aim of the invention is to increase the effectiveness of preventing sudden outbursts by taking into account the degree of outburst of coal seam along the height of the excavation block and expanding the field of application by using it in shield coal mining.

The drawing shows the unloading diagram of the excavation block grooves.

The method is carried out as follows.

The extraction unit 1 of the coal seam, adjacent to the waste unit 2, is opened with an industrial seam 3, which is conducted from field drift 4 and is located at least 5 m from the coal seam.

In block 1, an outburst-hazardous zone 5 is located, located at a distance of at least 25 m from the spent block 2 along the strike of the formation and at a height of at least 2/3 of the height of the excavation block.

Scientific research and experience

development of outburst formations

A method for preventing sudden coal and gas emissions during steep seizure, including carrying out a mine workout and forming unloading grooves therefrom in a coalbed excavation block, characterized in that, in order to increase the effectiveness of preventing sudden emissions by taking into account the level of outburst risk of the formation along the excavation block and expanding the field of use by using it in coal panel excavation, a field drift is conducted as a mine workout and an industrial layer is opened from the drift road and coal

found that a portion of the excavation block adjacent to the spent block, 20-25 m long, along the strike of the seam and in the upper third part of the lava of the steep layers (at depths of 35 layers in each excavation block, more than 500 m) is unloaded from the mountain The pressure grooves are formed from perforation, are sufficiently degassed and not shlagah and have them fanlike, is outwardly hazardous. And the first groove is conducted along the border

Then, from the industrial elevator 3, along the edge-cutting unit with the adjacent excavation center of the excavation unit 1 in the area of intra-40 unit with a depth equal to two-thirds of the mean angle of the out-of-danger zone 5, the height of the excavation unit forms a discharge groove 6 with a height equal to two-thirds of height of the excavation block 1. With a friend

unloading grooves have an angle of 10-11 to the first groove and one to

6 are arranged perpendicular to the field drift 4. After that, grooves 7–13 are formed; they are fan-shaped at an angle of 10–11 to groove 6 and one to the other. This angle of inclination provides an increase in the number of grooves in the lower part of the outburst-hazardous zone 5. At angles less than 1C, the volume of the grooves increases without increasing the efficiency of their unloading effect, and at angles more than 11

their effects are significantly reduced. The formation of grooves can be carried out, for example, by leaching using a KBG installation.

Claims (1)

Invention Formula A method for preventing sudden coal and gas emissions during steep seizure, including carrying out a mine workout and forming unloading grooves therefrom in a coalbed excavation block, characterized in that, in order to increase the effectiveness of preventing sudden emissions by taking into account the level of outburst risk of the formation along the excavation block and expanding the field of use by using it in coal panel excavation, a field drift is conducted as a mine workout and an industrial layer is opened from the drift road and coal the reservoir in each excavation block, the unloading grooves are made of industrial shutters and have them fanlike, the first groove being drawn along the boundary excavation unit with an adjacent excavation unit with a depth equal to two-thirds of the height of the excavation unit, and the rest unloading grooves have an angle of 10-11 to the first groove and one to Editor L. Langazo Composed by M.Gagulin Tehred A. Kravchuk Proofreader S. Shekmar Order 1409/32 Draw 430 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4