RU2460882C2 - Destruction method of mine rock with cross cutters - Google Patents

Abstract

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

Description

The invention relates to the mining industry and can be used in roadheaders for the destruction of rocks with a working tool.

The technical solution is aimed at increasing the efficiency of the processes of rock breaking with tunneling and harvesting combines with cross cuts.

The positive effect of the proposal is ensured by the destruction of the face by cross cuts by rotary and planetary-disk executive bodies with low energy consumption and the output of small fractions of ore. To increase the efficiency of cross-cuts, the rock-cutting tool of planetary-disk organs moves in cycloidal-radial directions.

The invention relates to the mining industry and is intended for breaking rocks with a working tool of roadheaders.

Flat disk actuators are known whose incisors move in spatial cycloidal directions and cover the face with many intersecting cuts [1]. Studies have found that when the face is destroyed by intersecting cuts with certain parameters, there is a decrease in specific energy consumption and the output of small ore fractions [2, 3].

The disadvantages of the planetary destruction organs are due to the fact that the depth of cuts formed by the incisors of the front and rear parts of the discs is not the same and the intersection of the cuts in the central part occurs at small angles [1, 2].

A known method of destruction of the array with cross cuts, implemented in the form of a device consisting of planetary-disk and rotary actuators mounted on one shaft and destroying the face with cuts in radial and tangential directions [4].

A common disadvantage of the method and the combined organ of destruction is that due to a certain change and combination of the depth and step of cutting the planetary-disk actuator, it is impossible to ensure the destruction of the entire surface of the face with the most effective cross-cutting parameters. The main reason for this drawback is due to the fact that in the second half of the radial cuts, the cutting step varies from average to maximum, and the cutting depth from maximum to zero. It is obvious that in the final section of cuts the effect of cross cutting will be completely absent, and in the previous section it will be insignificant. Therefore, it can be assumed that in the second half of cuts, the effect of cross cutting can vary from maximum to zero.

The purpose of the invention is to increase the efficiency of the processes of destruction of the face by cross cuts.

A higher level of efficiency of the proposed method is provided due to the fact that the massif is simultaneously destroyed by continuous cuts in the form of concentric circles by a rotary actuator and successive cuts of a cycloidal radial direction by planetary inclined-disk actuators.

Schemes of the device and cutting lines of the executive bodies of the tunneling shearer are presented in figures 1 and 2.

The planetary destruction organs consist of disks 1, 2 mounted with an inclination in opposite directions relative to the direction of the portable movement and mounted on the fixed 3 and moving 4 shafts of gears 5, 6, single-beam faceplates 7, 8 bent in two planes, mounted on a fixed shaft 3 and gear housing 6. The working tool 9, consisting of fists with cutters, is mounted on the supporting surfaces 10, 11 with an offset “a” necessary to ensure effective rock destruction. In the gearbox 5, rotation from the gear wheel 12 to the disk 1 is transmitted through the clutch 13.

During the operation of the combine, disks 1, 2, rotating around their own axis and axis 14 of the actuator, destroy the array by successive cuts with cutters of the front of the disk 1 and the rear of the disk 2 in cycloidal radial directions. Regardless of the direction of rotation of the disks, the step and depth at the beginning of cuts increase (from zero), take the maximum value in the middle part of the cuts, and then decrease again to zero. Since the disks are mounted with an inclination in different directions relative to the direction of the portable movement, the face is destroyed by the working tool of the front of the disk 1 (Fig. 1) and the rear of the disk 2 with intersections of cuts in the central and peripheral parts of the face at angles close to 90 ° C small values and a proportional change in depth and cutting pitch. With these parameters of cross cuts, the greatest effect of the destruction processes of the array is ensured.

In the middle part of the face, circular cuts of a cycloidal radial direction with a variable cross section intersect with cuts of a constant cross section of the tangential direction (relative to the axis of the actuators) of the rotors. The change in the cross section of cycloidal radial cuts is due to a directly proportional change in their depth and pitch. Based on experimental studies, it was found that the specific energy consumption for the destruction of the array by cross cuts decreases with a decrease in their depth and step, and for each value of the depth of cut there is an optimal step at which the energy consumption for destruction is minimal [3]. The specified criteria for the effectiveness of cross-cuts are realized during the work of disk and rotary organs. The effective depth of the disk cuts is provided by the selection of the appropriate feed rate of the combine, the number of disks and rotors and the frequency of the portable movement of the disks. The optimal values of the depth and cutting pitch of the rotor actuators are ensured, respectively, due to the displacements of the supporting surfaces of the rock cutting tool "a" (Fig. 1) and the rock cutting tool on the supporting surfaces.

Highly efficient destruction of the array with cross cuts is also provided when both discs are tilted to one side relative to the direction of their portable movement. With this arrangement, the disks are located on one axis passing through the common axis of rotation, and the trajectories of the cutters of the planetary organs do not intersect, and therefore the entire surface of the face is destroyed by both executive bodies (Fig.2, b).

Literature

1. Arkhangelsky A.S. Some questions of the theory of planetary executive bodies of roadheaders. Calculations, design and testing of mining machines. Collection No. 12. Ed. Ing. Topchieva A.V. - M .: Ugletekhizdat, 1955 .-- 451 p.

2. Dolgov L.V. Improving the flat-planetary executive bodies of roadheaders // Mining electromechanics and mechanization of mining. - M .: Nedra, 1969 .-- 383 p.

3. Starkov L.I. et al. Cross-cutting pattern study. Mountain Journal. Izv. universities 1997, No. 7-8, p. 121-123.

4. Chekmasov N.V. and others. The method of destruction of the rock mass by cross cuts. Patent for invention No. 2375571.

Claims (2)

1. The method of destruction of the massif by cross cuts, implemented by the planetary-disk and rotary executive bodies of a tunneling shearer, characterized in that the massif is simultaneously destroyed by cuts relative to the axis of the executive bodies in the cycloidal radial direction with the working tool of the planetary inclined-disk executive body, and in tangential direction (relative to the axis of the executive bodies) by the working tool of the rotor body. 2. The method of destruction of the rock mass by cross cuts according to claim 1, characterized in that the central and peripheral parts of the face (relative to the axis of the executive bodies) are destroyed by intersecting cuts of the cycloidal-radial direction of the planetary bodies, the disks of which are inclined in opposite directions relative to the direction of portable movement, and the middle part of the face - intersecting cuts of planetary and rotary actuators.

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