Destruction method of mine rock with cross cutters

FIELD: mining.

SUBSTANCE: method is implemented due to destructing the working face with cross cutters using rotary and planetary disc working members with lower power consumptions and yield of small ore fractions. In order to improve the efficiency of cross cutters, rock-destructing tool of planetary disc members moves in cycloidal-radial directions.

EFFECT: higher efficiency of destructing processes of mine rocks using heading-and-winning machines with cross cutters.

2 cl, 2 dwg

 

The invention relates to the mining industry and can be used in tunnel-treatment machines for rock destruction tool.

Technical solution aimed at improving the efficiency of processes blasting of rocks heading-treatment combines with cross-cuts.

The positive effect of the proposals is provided by the destruction of the bottom cross-cuts and rotary-planetary disk of the Executive bodies with low energy consumption and the release of fines ore. To improve the efficiency of cross-cuts the rock-breaking tool-planetary disk bodies moved on a cycloidal-radial directions.

The invention relates to the mining industry and is intended for blasting rock working tool heading-treatment combines.

Known plane-disk Executive bodies, the cutters are moved by spatial cycloidal directions and cover the bottom with many intersecting cuts [1]. Research has shown that when the destruction of the face intersecting cuts with certain parameters, the decrease of specific energy consumption and output of fines ore [2, 3].

The disadvantages of the planetary bodies of the destruction caused by the fact that the depth of the cuts formed by the cutter is mi front and rear discs, unequal crossing cuts in the Central part occurs at small angles [1, 2].

There is a method of destruction of the array cross-cuts implemented in the form of a device, comprising mounted on the same shaft of the planetary disc and rotor Executive bodies and destructive slaughter cuts in radial and tangential directions [4].

A common disadvantage of this method and the combined body of the destruction is that due to certain changes and combinations of depth and step cutting-planetary disk of the Executive body, it is impossible to ensure the destruction of the entire surface of the face with the most effective cross-cutting. The main reason for this lack is due to the fact that in the second half of the radial cuts the step of cutting varies from the average to the maximum value, and the cutting depth from the maximum to zero. Obviously, the final part of the cuts, the effect of cross-cutting is completely absent, as in the previous section will be negligible. Therefore, we can assume that in the second half of the cuts the effect of cross-cutting and can be changed from maximum to zero.

The purpose of the invention is improving the efficiency of processes of destruction of the bottom cross-cuts.

The higher the level of effectiveness of the proposed method is ensured by the fact that what mountain range at the same time destroyed the continuous cuts in the form of concentric circles rotor Executive authority and consistent cuts of a cycloidal radial direction of the planetary tilting-disk Executive bodies.

Circuit devices and lines cutting Executive bodies sinking-of the Shearer presented in figure 1 and 2.

Planetary bodies destruction consist of disks 1, 2, installed with a slope in opposite directions relative to the direction of the portable motion and fixed 3 and 4 movable shafts of the gears 5, 6, single-beam curved in two planes facing heads 7, 8, mounted on the stationary shaft 3 and the housing 6. The working tool 9, consisting of fists with the cutters, which are mounted on the supporting surfaces 10, 11 offset "and"necessary to ensure effective destruction of the breed. In the reduction gear 5, the rotation of the gear wheel 12 to the disk 1 is transmitted through the clutch 13.

When the harvester drives 1, 2, rotating around its own axis and the axis 14 of the Executive body, destroy the array consecutive cuts incisors anterior part of the disk 1 and the rear part of the disk 2 in a cycloidal-radial directions. Regardless of the direction of rotation of the drive step and depth at the beginning of the cuts increase (from zero)in the middle part of the re is s take the maximum value, and then again reduced to zero. As disk drives are installed with an inclination in different directions relative to the direction of the portable motion, the slaughter destroyed the working tool of the anterior part of the disk 1 (Fig 1) and the rear part of the disk 2 with intersections of cuts in the Central and peripheral parts of the face angles close to 90 with a small value and a proportional change depth and step cuts. When such cross-cuts provided the greatest effect of the destruction of the array.

In the middle part of the face of the disk cuts cycloidal-radial direction with a variable cross-section intersect with cuts of constant cross-section tangential direction relative to the axis of the Executive bodies of the rotor. Changing the cross-section of a cycloidal-radial cuts caused directly proportional change in its depth and step. On the basis of experimental studies have shown that the specific energy consumption for the destruction of the array cross-cuts decreased with decreasing depth and step, and for each value of depth of cut, there is an optimal step in which the power consumption to the minimum destruction [3]. These performance criteria cross-cuts are implemented when working disk and the rotary bodies. The effective depth of the disk cuts obespechivaetsya corresponding to the feeding speed of the harvester, the number of disks and rotors and frequency portable motion drives. The optimum values of the depth and pitch of the rotary cutting Executive bodies are provided, respectively, due to the displacement of the support surfaces of the rock cutting tool "a" (figure 1) and rock cutting tool on the bearing surfaces.

Efficient destruction of the array cross-cuts is also provided with the slope of both drives one direction relative to the direction of their portable motion. With this arrangement, the disks are arranged on the same axis passing through the common axis of rotation, and the trajectory of the incisor teeth of the planetary bodies do not intersect, and therefore the entire surface of the face collapses both Executive bodies (figure 2, b).

Literature

1. Arkhangelsk A.S. on theory of planetary Executive bodies of roadheaders. Calculation, design and testing of mining machines. Collection No. 12. Ed. ing. A.V. Topchiev): Whiteheat, 1955. - 451 S.

2. Debt L.V. Improvement PLANO-planetary Executive bodies of roadheaders// Mining electrical engineering and mechanization of mining operations. - M.: Nedra, 1969. - 383 S.

3. Starkov LI and other Research schemes of cross-cutting. Mining magazine. WPI. universities 1997, No. 7-8, s-123.

4. Chekmasov NV and other destruction Method th the aqueous array of cross-cuts. Patent for invention No. 2375571.

1. The method of destruction of a rock cross-cuts implemented by the planetary disk and rotor Executive bodies sinking-of the Shearer, wherein the array at the same time destroyed cuts relative to the axis of the Executive bodies in cycloidal-radial direction of the working tool of the planetary tilting-disk of the Executive body, and in the tangential direction (relative to the axis of the Executive bodies) working tool of the rotary body.

2. The method of destruction of a rock cross-cuts according to claim 1, characterized in that the Central and the peripheral part of the face (relative to the axis of the Executive bodies) destroyed intersecting cuts cycloidal radial direction of the planetary bodies, discs are tilted in opposite directions relative to the direction of the portable motion, and the middle part of the face - intersecting cuts planetary and rotary Executive bodies.



 

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