SU1283388A1 - Method of unattended excavation of steep coal seems - Google Patents

Abstract

The invention relates to the field of mining industry and is intended to develop outburst-hazardous seams (n) coal (y). The purpose of the invention is to reduce the explosion hazard of the active gaseous medium and the strength Y in the array, reducing the cost of transporting gas and the material to the evacuated space 8. With the floor-standing method of preparation, the haulage and vent drift is carried out. Spacing W is localized by an insulating strip I. To do this, a suture above the under-strip strip U is made. In the cavity formed, ejection hatches 2 are installed. A split furnace 3 is carried out. A movable mechanized barrier 4 is mounted in it and a hardening mixture is fed. The development of the floor by the posts along the strike is conducted by self-sticking U in the active gas “L

Description

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to the medium with preliminary degassing of P. Through the backfill pipe 6, carbon dioxide is supplied (UH) over the fence 4 and the materials are transported to them. Bottom hole 7 to the vent W is filled with UG. Decontamination P contributes to the penetration of the UG into the coal massif and intensifies the process of self-destruction.

Through the hatches 2, the U is discharged to the haulage U and transported to the surface. With the release of U, at the exit from space 7, the UG is caught and returned through conduit 6 back to maintain its constant contribution. The next step is to bookmark space 8. 1 ill.

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The invention relates to the mining industry and can be used in the development of steep emissions of dangerous coal seams in a floor-by-floor method of preparation.

The purpose of the invention is to reduce the explosion hazard of the active gaseous medium and the strength of coal in the massif, as well as reduce the cost of transporting gas and material of the laying to the developed space.

. The drawing shows a diagram of the mountain workings in the plane of the reservoir in the process of excavation of coal.

The method is carried out as follows.

At the storey preparation method, the field is localized by an insulating strip 1 on the side of the road drift. The construction of the insulating band 1 is carried out by digging the Yadshtrekova coal strip, followed by the supply of the hardening mixture to the cavity formed. In the cavity, exhaust hatches 2 are installed in the cavity. Then a split furnace 3 is installed in which a mobile mechanized barrier 4 is mounted,

Dp of coal extraction from the isolated section 5 through the pneumatic filling pipe 6 for the mechanized fence 4 serves carbon dioxide, which simultaneously performs the function of the carrier medium in the pneumatic laying pipeline. The carbon dioxide passes through the mechanized fence 4 and fills the entire bottom hole area, 7 up to the ventilation drift.

As a result of creating a saturated carbon dioxide environment, n0 occurs.

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decrease in coal strength due to sorption swelling.

Experimental studies have established that the value of sorption swelling of coal in a carbon dioxide environment is 3.5–4.5 times the amount of sorption swelling of coal in a methane medium.

Reduction of adhesion and friction forces in the softened coal leads to an imbalance between the pressure of rocks and gas on the one hand and the resistance to crushing coal on the other. In addition, an additional effect on the non-equilibrium system of gravitational forces and the subsequent influence of the reference pressure leads to self-collapse of the coal, which is discharged through the discharge hatches 2 to the haulage and then transported by surface transport to the surface.

Pre-degassing of the formation facilitates the penetration of carbon dioxide into the coal mass and intensifies the process of self-destruction of coal.

In the process of discharging the exfoliating coal, carbon dioxide is also partially lost, therefore, to maintain its constant concentration in the bottom hole 7, regular replenishment of carbon dioxide is carried out through the pneumatic laying pipeline 6. The working out of section 5 is performed with laying the developed space 8, Kotor provides the maintenance of lateral rocks and allows the use of lightweight mechanized fencing for the separation of the bottomhole and developed space. Controlling a mechanized fence with a ventilation drift. The monitoring of the location of the support sections and the change in the shape of the clearing line is carried out using, for example, an ultrasonic sensor.

All the work associated with coal mining, in the implementation of the proposed method, is carried out without the presence of people in the cleaning space.

Claims (1)

Invention Formula The method of deserted excavation of steep coal seams, including the floor preparation by carrying out haulage and ventilation drifts, localization of the haulage shaft by an insulating strip of hardening material, working the floor with columns along the strike. 833884 forming an active gaseous medium. supplying gas to the bottomhole space, self-destructing coal in a gaseous environment, discharging coal through hatches on an кат roll track and laying the depleted space by supplying a filling material through a filling pipeline, characterized in that, in order to reduce explosion (0 hazard of active gas) environment and strength of coal in the array, as well as reducing the cost of transporting gas and material of the bookmark into the net, is 15 degassing of the reservoir, then carbon dioxide is fed into the worked-out space through the filling pipeline and the material is transported to them for sweet, and when carbon is released, carbon dioxide 20 is picked up at the exit from the bottomhole space and fed to the laying pipeline.