SU859637A1 - Apparatus for electrodynamic braking of rock - Google Patents

Description

one

The invention relates to the mining industry, namely, devices for the destruction of rocks by electric current, and can be used to break them when electrodes are placed on one surface.

A device for destroying rocks by electric current is known, consisting of a housing with insulators attached to it, with holders with electrodes mounted for movement, and an insulator mounted between the holders 1.

Such an embodiment of the device ensures reliable contact of the electrodes with the rock to be destroyed and an increased destruction performance.

However, when using this device 20 in the bottom with one available surface, several pairs of electrodes can simultaneously appear in contact, therefore, in the case of the same electrical resistance between them, the accumulated energy in the capacitor bank can flow through several complete or incomplete breakdown channels, and breaking rock becomes non-optimal.

The closest to the technical essence and the achieved effect to the invention is a device, gugo for electrodynamic destruction of rocks, having a frame and holders mounted on it by means of insulators with electrodes connected to the current source and in contact with the destroyed rock L2.

A disadvantage of this device is that when electrodes roll over the rock surface, the released electrical energy does not always produce rock destruction in the interelectrode space with its ejection. Often, with partial destruction of rock in the interelectrode space, cracks, broken blocks are formed, which prevent the contact of the electrodes with the undisturbed rock, which ultimately leads to an additional pereaeme longer. of the breed, blame the energy intensity of destruction, decrease in productivity.

Claims (2)

The aim of the invention is to increase the reliability and reliability of the process by creating an oooomatic electromagnetic field between the inner surface of the holders and a non-uniform electromagnetic field between the electrodes. This goal is achieved because the holders are made in the form of a wedge, the contour of the cross section | the shape of a one-sided wedge, the holders being hollowed, and the insulators made of an elastoplastic material, Fig. 1 shows a device for electrodynamic destruction of rocks, general view; Fig. 2 is the same in plan; Fig. 3 is the sameThe device for electrodynamic destruction of rocks has a frame 1 and insulators 2c attached to it, with holders 3 and electrodes 4 fixed to them, power cable 5. The angle oL of the holders 3 with electrodes 4 relative to the surface to be destroyed is provided and is maintained by the positioning of the frame 6. Mechanical EFFORTS on the electrodes 4 are transmitted by means of hydraulic cylinders 7, the working distance between the electrodes is provided by clamps 8. The holders 3 are made in the form of a wedge. LfTetanus section which has the shape of the oval, smoothly conjugated straight, parallel to one of the symmetry axes of the oval, and the projection holders to horizontal and vertical planes are one sided wedge shape. This embodiment of the holders contributes to the fact that between the internal oval surfaces of the holders there is a uniform electromagnetic field when electric pulses are applied to them, which has a higher breakdown strength than the field created at the ends of the electrodes 4, since they have a smaller radius of curvature and the field created by HNB4 is non-uniform. This ensures discharges at the contact of the electrodes with the rock and eliminates breakdown in air between the holders. Each pair of owners 3 is installed in such a way that their flat edges are perpendicular to the surface of the fractured rock, parallel to each other and located on the outside. This embodiment of the holders 3 provides the possibility of the device passing into the cavity formed to the full depth, i.e., up to the node b with both the incrustation of the stream prodrod flow technology. The insulators 2 are made of an elastic dielectric material, for example, nylon, which makes it possible to transfer large mechanical forces to the electrodes 4 with holders, 3 and additional mechanical destruction of the rock. The implementation of holders 3 hollow ensures a reduction in the weight of the structure as a whole, which is important during installation, preventive repairs, etc. The device works as follows. The frame 1 of the device is fixed on the boom or manipulator of the mining machine, with the help of which it moves along the bottom of the mine working. The position of the electrodes 4 relative to the surface to be destroyed is provided by the node 6, and the mechanical forces are transmitted through the hydrocylinders 7. The electrodes 4 are supplied with electric current, which is released in the rock while the electrodes 4 are in contact with the rock surface and then destroying it. After electrodynamic action on the rock, a mechanical action is provided by means of hydraulic cylinders 7 with additional destruction of the rock and making contact with the newly formed surface and ensuring the next cycle. Claim 1. Device for electrodynamic destruction of rocks, having a frame and electro-insulated holders with electrodes attached to it, characterized in that, in order to determine the reliability of the process of destruction by creating a uniform electromagnetic field between the inner surface of the holders and a non-uniform electromagnetic field between the electrodes, the holders made in the form of a wedge, the cross-sectional contour of which has the shape of a part of an oval, smoothly conjugated with a straight, parslial one of its axes of symmetry, and the projections of the holders on the horizontal and vertical planes have the form of a one-sided wedge. 2. The device according to claim 1, characterized in that, in order to facilitate the construction, the holders are made POLAND4. 3. The device according to paragraphs. 1 and 2, ayucey differs in that insulators are made of elastic plastics material. Sources of information taken into account in the examination 1. The author's certificate of the USSR 492659, cl. E 21 C 37/18, 1975. 2. USSR author's certificate according to application no. 2523305 / 22-03, c. E 21 C 37718, 1977. (put.l 49v.t f