RU2461710C2 - Method for coal extraction using activated plough - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: method for coal extraction using dynamic plough involves cutting of deep advance slots in formation mass at the roof, soil and middle, working face, and further destruction of mass in two consoles weakened with slots are performed by shearing; at that, width of cut slot and cutting depth of consoles is set and adjusted along the strike due to turning angle relative to working face of actuator with cutting tool the cutters of which describe ellipsis trajectory, and shearing force is created due to external taper surface of actuator housing when the plough is being moved along the working face.

EFFECT: improvement of coal extraction controllability on coal formations with complex structure; increase in depth of removed chips.

Description

The invention relates to the mining industry and can be used in coal mining.

There is a method of underground mining, in which a coal is used to extract coal, removing chips at full seam capacity [1].

The disadvantage of this method is the high energy intensity of the separation of coal from the array and the small thickness of the removed chips.

A known method of coal extraction, implemented by a dynamic plow, in which the chips are removed at full capacity of the formation, and the dynamic plow has a body, working bodies with cutting tools, a vibration exciter, drive sprockets, an endless traction chain, the working branch of which bends around the drive sprockets, the working bodies have the ability limited longitudinal movement relative to the body, and the upper, roofing, and lower, soil, made static [3].

The disadvantages of the method is the high energy intensity of the separation of coal from the array, dynamic cutting is not used in the roof and soil.

The closest technical solution is the method of coal extraction, in which deep leading slots are initially cut in the formation array near the roof, soil and the middle, and further destruction of the array in two consoles weakened by the slots is carried out by shearing using a cutting tool [2].

The disadvantage of this method is the impossibility of changing the width of the gap, its regulation when changing the characteristics of the reservoir (coal strength, fracturing, hypsometry, etc.).

The task of the invention is to increase the controllability of the extraction of coal on coal seams with a complex structure and increase the depth of the removed chips.

The solution to this problem is achieved by the fact that coal is mined with a dynamic plow, including cutting deep advancing slots in the formation array near the roof, soil and its middle, and further destruction of the array in two consoles weakened by slots is carried out by chipping, characterized in that the width of the cut slot and the depth of cutting the consoles are installed and in the course of regulation (change) due to the angle of rotation relative to the chest face of the executive body with a cutting tool, the cutters of which describe an ellipse (oval) trajectory, and shearing force is created due to the conical external surface of the body of the executive body when feeding the plow along the face.

The invention is illustrated by drawings.

Figure 1 - diagram of the formation of leading gaps;

Figure 2 - the position of the cutting body when cutting leading slits;

Figure 3 - the position of the cutting body when cutting the base of the console and chipping it.

In the drawings, the following notation: 1 - coal seam; 2 - the body of the dynamic plow; 3 - conveyor; 4 - executive body with a conical outer surface of the housing; 5 - rotary mechanism of the executive body with a cutting tool.

Cutters of the cutting tool of the executive body describe an ellipse (oval trajectory) on the face chest.

The width of the shear slit is set by a rotary mechanism: minimum, provided that the small axis of the ellipse a is perpendicular to the soil of the formation, and the large in parallel to the soil of the formation.

If necessary, cut a wider slit, the working body is turned at a certain angle α, but not more than 30 °.

When cutting the bases of the consoles, the working body is rotated through an angle of up to 90 °. The ability to vary these values depends on the magnitude of the relations of the major and minor axis of the ellipse, for example, а: в≈1: 2.

When cutting leading slits, the cutting body moves along the major axis of the ellipse (figure 2), while the width of the slit is equal to the minor axis of the ellipse.

To destroy the consoles, the executive body is rotated by a rotary mechanism 5 by an angle of up to 90 °, which ensures the cutting of the base of the consoles and creates the conditions for their chipping by turning through an angle of up to 90 ° and using the conical surface of the body of the executive body as a wedge cleaving the console.

LITERATURE

1. Kundel X. Coal mining: Trans. with him. / Ed. V.I.Paramonova. / X. Kundel. - M .: Nedra, 1986. - Transl. Publishing House: Germany, 1983. - P. 59-63.

2. A.S. THE USSR. No. 110597. The method of coal extraction. Claim 03/20/1958.

3. Dynamic plow. RF application No. 96110016/03. Alexandrov V.E., Turov A.P., Burygin A.G., Sesyutchenkov M.A., Osherov B.A., Zagayny L.B. 1996.05.20. Publ. 08/08/20.

Claims (1)

The method of coal extraction by a dynamic plow, including cutting deep leading slots in the formation array near the roof, soil and middle, bottom, and further destruction of the mass in two consoles weakened by slots, are chipping, characterized in that the width of the cut slot and the depth of cutting of the consoles are set along the way adjust due to the angle of rotation relative to the chest of the slaughter of the executive body with a cutting tool, the cutters of which describe an elliptical trajectory, and the shearing force is created due to the conical external rotation characteristics of the body of the executive body when feeding the plow along the face.

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