Method for breaking of massif with cross cuts

FIELD: mining.

SUBSTANCE: invention is related to mining industry and may be used in boring-shearing combines for rock breaking with cutting tool. Method for breaking of massif with cross cuts of certain depth made with rotor and planetary-disk actuators. When using combined breaking element: cuts of planetary-disk actuator are arranged in radial direction, and cuts of rotor actuator in tangential one in the form of concentric circumferences. At the same time depth of rotor element cuts is equal to depth of planetary element cuts in the areas of cuts crossing.

EFFECT: reduced power inputs and yield of fine rock fractions in process of massif breaking with combine actuators.

2 cl, 4 dwg

 

The invention relates to the mining industry and can be used in mining machines for rock fracture average and below average strength cutting tool.

Known industrial methods of destruction of salt rocks with planetary disk and the rotor of the Executive bodies of the tunnel-treatment harvesters [1]. Planetary disk of the Executive bodies destroy an array of divergent cuts (relative to the axis of rotation) of variable cross-section in the radial direction with a small offset in the tangential direction, and the rotary parallel concentric cuts of constant cross-section in the tangential direction.

Disadvantages of these methods of destruction by the Executive bodies of harvesters due to high energy consumption for breaking the salt of the array and the output of fines ore.

Known ploskovskoye planetary body, the distinctive feature of which is that the cutters are moved in space cycloidal curves and cover the bottom with many intersecting cuts[1, 2, 3].

Research has shown that when the destruction of rocks intersecting cuts reduced energy consumption for destruction and exit of small fractions of the rock mass [3, 4].

Disadvantages ploskovskaya planetary Executive bodies due to the fact that ezzy, on the front part of the disk, destroy the face thicker shavings outside the effective cross-cuts. Cuts from the incisors, located on the rear discs have a small depth, and the amount of destructible array [5]. In addition, some of the cuts are in relation to each other at small angles.

The purpose of the invention is the reduction of energy consumption and output small fractions of the rock mass with destruction of rocks by the Executive bodies of harvesters through the cross-cuts. To implement cross cuts massif at the same time destroyed the planetary disc and rotor Executive bodies.

Planetary bodies destroy the face radiating cuts, and cuts the rotary bodies relative to the axis of rotation are tangential direction in the form of concentric circles.

The Executive body sinking-of the Shearer presented in Fig.1-2, a diagram of the cuts made by the cutters planetary and rotary Executive in figure 4, the cross-section along a-a in FIGU - figure 3.

Planetary Executive consists of 2 discs 1 installed on the handles handout 4 gear 5. Rotary Executive body 3 made in the form of a 2-beam faceplate, rigidly attached to the transfer case gear 5. On the abutment surfaces 8 usage is sustained fashion authorities pinned the rock-breaking tool 9, consisting of fists and cutters 2.

When the harvester drives 1 (1), rotating around its own axis and the axis 7 of the Executive body, destroy the array of cuts I (figure 2), with a predominantly radial direction. The depth of cuts planetary body is impermanent and changing the law [6]

where vPthe feed speed of the harvester, ωP- the speed of the Executive body, toD- the number of disks, φ is the current value of the position angle of the cutter.

Cutters of rotary body destroy the circular array concentric cuts II (figure 2), overlapping with the cuts I at angles close to straight. The depth of cut is constant and equal to

where m is the number of cutters in the line of destruction.

From the comparison of (1) and (2) when KD=m, the conclusion must be that, if the supporting surface 8 on which is mounted the rock-breaking tool rotary body, to run in the form of a semicircle with diameter equal to the diameter of the support surface of the disc, the depth of cuts at the intersection III (figure 2) will be different (with the exception of one cut at φ=π/2), resulting in reduced efficiency of the blasting of the rock mass cross-cuts. To perform the conditions of equality in the intersection depth of cut cutting edges of the cutters and the bearing surface of the rock cutting tool is umenta rotary and planetary bodies must have an offset, equal

The area of effective processes of cross-cutting is limited by the depth of the cuts. The effective depth of cross-cuts shall be in an appropriate amount of disc cutters in the line of cut of the Executive bodies and the feed speed of the harvester.

Literature

1. Starkov LI and others, the Development of mechanized potash ores. - Perm: Izd-vo VT. Gastein. University, 2007. - 522 S.

2. 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.

3. Malt NR. and other Mining machines and automated complexes. Textbook for high schools. - M., Nedra, 1981. - 503 S.

4. Starkov LI and other Research schemes of cross-cutting. Mining magazine. WPI. higher education institutions. 1997. №7-8. with 121-123.

5. Debt L.V. Improvement plascoenergy Executive bodies of roadheaders. Sat. Mining electrical engineering and mechanization of mining operations.- M.: Nedra, 1969. - 383 S.

6. Machines for production of potash ores /Vsesojuzn. nauch.-issled. Inst. of mineral/ Min in the production of minutes of fertilizers USSR; comp. Skibee and others - M.: Nedra, 1990. - 200 S.: ill.

1. The method of destruction of a rock cross-cuts implemented by the planetary disk and the mouth is rmym Executive bodies sinking-of the Shearer characterized in that array at the same time destroyed cuts relative to the axis of the Executive bodies in the radial direction of the rock cutting tools-planetary disk body, and in the tangential direction - rock cutting tool rotary body with a depth of cut equal to the depth of cuts planetary body at the intersections of the cuts.

2. The method of destruction of a rock cross-cuts according to claim 1, characterized in that the bearing surface for fastening rock cutting tool rotary Executive body is made with an offset relative to the support surface of the disc, equal to the difference between the depth of cut of the rotary body in the absence of bias, and the planetary body of destruction at the intersection of the cuts.



 

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