DE1017563B - Method and device for impact traction in mining by means of rapidly successive mechanical impacts - Google Patents

Description

It is known in mining, the so-called impregnation process for loosening and extraction, in particular of coal to be used to loosen the coal and at the same time remove the coal dust before extraction knock down and thereby facilitate the extraction of coal. With the known Impregnation processes are holes in the coal face at certain intervals, for example 40 mm diameter drilled to a depth of about 2 m, into which the drinking tube is inserted and sealed be braced. Then water or some other incompressible and wetting liquid becomes pressed through the impregnation pipes into the shock, which penetrates the bad coal and gradually the impregnated the entire excavation face. Then the coal is either by a single sudden increase in pressure or loosened by several successive pressure pulses. These known methods how they z. B. by the German patents 404 168 and 241 966 are disclosed, have the disadvantage on that the impregnating liquid column after each working stroke from standstill to the speed determined by the drive pulse and the resistance must be accelerated.

These disadvantages are avoided by the fact that for loosening and winning in, in particular of Coal, a process used in which pressurized soaking liquid by means of rapidly successive mechanical impact is introduced into boreholes and pushed into the coal face and During the idle stroke of the plunger, the soaking liquid is fed in by the inflow pressure, - Such a method is already known - according to the invention in the continuously open to the front Interior of the impregnation pipe and in the borehole both during the pressure surge and during the idle stroke of the Plunger a continuously coherent impregnation liquid column is maintained and the oscillation pulses be transferred to this coherent column of liquid.

This process ensures that the impregnating liquid column, since it does not during the idle stroke is interrupted and her pressed into the coal pile by the previous working stroke Volume is replenished from the inflow line, constantly moving in the direction of the coal face remains, so that only that energy has to be used during the working stroke, which is necessary to the Soaking liquid from the speed essentially determined by the inflow pressure to the so to bring the speed given by the drive pulse.

The invention also relates to a device for carrying out the method according to the Er method and device

for impregnation in mining

by means of rapidly successive

mechanical shocks

Applicant:
Dipl.-Berging. Albrecht Graf he,

Sprockhövel (Westphalia), Wittener Str. 39,
and Dipl.-Berging. Hugo nuts,

Sprockhövel (Westphalia), Wittener Str. 68

Ewald Wedig, Dipl.-Berging. Karl-Heinz Pfuhl, Herne,

Dipl.-Berging. Albrecht Graefer

and Dipl.-Berging. Hugo Nüsse, Sprockhövel (Westphalia), have been named as the inventor

finding, which consists of a drinking tube provided with a beating pulse or vibration device with an inlet check valve in which, according to the invention, the drive piston and the plunger piston are made of two separate parts and the plunger has an idle stroke limit stop having. This has the particular advantage that the device according to the invention even when it is completely at a standstill the introduction of water into the coal face continues and the loosening work continues can. In contrast, have known devices for loosening and winning in Coal by means of an impregnation liquid, as described, for example, by German patent specification 404 168 is to open a plunger firmly connected to the percussion piston, which then come to a standstill, when the water pressure has increased so much that the power of the drive does not allow the plunger to submerge enables more.

Further essential advantages of the method and the device according to the invention are that with them compared to the known methods and devices the same work in considerably can be carried out in a shorter time, since when using the method and the device according to of the invention, the introduction of water into the coal face even during the idle stroke of the drive piston takes place, that is, that the method and the device according to the invention operate continuously,

709 7S6 / 5

wherein the flow rate of the impregnation column between the pressure caused by the inflow speed and the speed determined by the impact pulse changes, but never to Becomes zero.

Further advantageous details of the invention are apparent from the drawing, in which a for the device suitable for the invention is illustrated, for example, schematically.

In the drawing, 1 denotes a drinking tube of any structure; 2 represents a Impact pulse device, preferably a compressed air impact tool, which is in the extension of the Axis of the drinking pipe 1 is arranged. Between the drinking tube 1 and the beater 2 is shown in the "15 Provided embodiment, an intermediate piece 3 is arranged, which the pressurized water supply nozzle 4, a cylinder 5 and a piston 6 surrounding this cylinder like a sleeve, which on the one hand on the cylinder 5 of the intermediate piece 3 and on the other hand in the cylinder of the pneumatic impact tool 2 is performed, the piston 7 exerts rapid blows on the piston 6 when the air hammer tool is acted upon via the line 8 with compressed air. Set the blows of the percussion piston 7 via the piston 6 via the pressurized water column in the cylinder 5 and thus via the drinking pipe 1 to the pressurized water penetrating into the piston joint. Within the nozzle 4 is preferably a short-stroke Oscillating valve 9 arranged, which when the impact pulse occurs, a backflow of the Prevents soaking liquid from entering the supply line. The blow of the hammer acts on a much smaller volume, so that the entire effect is harder is. When the percussion piston 7 falls, the line pressure pushes the pump piston 6 back into its starting position back, whereby the swing valve 9 opens. The valve 9 itself has a stroke of approximately 0.5 to 1 mm.

In the illustrated embodiment, the air hammer tool 2, the intermediate piece 3 and the drinking pipe 1 is connected to one another by the bolts 10 via corresponding flanges.

Claims (3)

Patent claims 1. Method of loosening and extraction, especially of coal, in which pressurized impregnating liquid by means of mechanical impacts in rapid succession is introduced into boreholes and printed in the coal face, with during the idle stroke of the Plunger piston the impregnating liquid is tracked by the inflow pressure, characterized in that that in the forward constantly open interior of the soaking tube and in the borehole both during the pressure surge as well as during the idle stroke of the plunger a continuously coherent one Soaking liquid column is maintained and the oscillation impulses are related to this Column of liquid are transferred. 2. Apparatus for performing the method according to claim 1, consisting of a with a watering tube provided with a pulse or vibration device with an inlet check valve, characterized in that the drive piston (7) and the plunger piston (6) are two special Parts are and an idle stroke limitation device (11) is provided for the plunger piston (6). 3. Apparatus according to claim 2, characterized in that the inlet check valve (9) is arranged in a branch line (3) connected to the drinking pipe (5). Considered publications: German Patent Nos. 241 966, 404 168, 135;
U.S. Patent No. 2,211,243. 1 sheet of drawings © 709 756/5 10.57