SU726335A1 - Apparatus for monitoring rock displacement - Google Patents

Description

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The invention relates to mining and is intended to observe the movement of rocks during mining operations.

Methods are known for surveying observations of the displacement of mountain rocks, as a result of their operational part-time work. Embodiments are carried out in wells specially drilled for this purpose. The location of the mexican depth reference points is defined. using an electric contact device placed in a magnetic field 1. When using devices with contacts placed in a magnetic field, it is necessary to make a casing of the well with dielectric pipes, and this does not guarantee sufficient measurement accuracy.

It is also known a device for monitoring the displacement of mountainous rocks, occurring as a result of their operational part-time work, including depth reference points, measuring and signaling devices, connecting cable and measuring tape 2,

The device for carrying out this method contains a geophysical, gamma-logging installation and differs from its analogue in that

There are no shots for the introduction of the borehole walls of radioactive bullets playing the role of gene benchmarks, a device for counting drum winch revolutions during tripping, a disc of divisors, a descent turn counter and an up turn counter, as well as winch on contact plates for

0 connecting radiometer and distribution device for even cable laying.

The purpose of the invention is to improve the accuracy and reliability of measurements.

The goal is achieved by the depth.

5 reper points contain annular reflective surfaces, and the measuring device is equipped with an opaque barrier and has

0 photodetector, a light source, between which there is a partition, and also two holes, one of which is against the photoreceiver, and the other is against the light source.

five

FIG. 1 shows a diagram of the proposed device; FIG. 2, an optoelectronic device inside a depth reference frame.

The device consists of several

0 deep bench marks 1 with ring

light-reflecting surfaces 2, an optoelectronic device 3, send6 to the rappers Using dymplane rods 4, a guide sleeve 5, mounted in the wellhead. bolts 6, a telescopic measuring stand 7 with a clock indicator, type, hp, amplifier 8 DC, loaded on the coil of the electromagnetic relay 9, the signal lights 10 and the source 11 of direct current. Frameworks are sleeves with fixed singing at cnocq6jTejiHHMH of known construction.

and are placed in the well at various distances from its mouth

Ring reflecting surfaces are obtained by polishing the end sections of the inner section of the sleeve. With this, the torsion surfaces are located at an angle to the Lc5 and the hub, which is determined by the design of the optoelectronic device. The optoelectronic device consists of a tubular body 12, to the upper end of which the guide head 13 is screwed, and to the lower end is a link rod 4. Inside the case are mounted the photo: resistor 14, which plays the role of a photodetector, an opaque barrier 15, a light bulb 16 (light source), reflector 17 and cartridge 18.

In the housing 12 of the optoelectronic device, opposite the photoresistor 14 and the lighting lamp 16, holes 19 and 20 are made, covered with a transparent material. The conductors coming from the photoresistors 14 and the lighting lamp 16 are assembled into a harness 21, laid. Inside the receiving bars 4. Through these conductors, the photoresistor 14 is connected to the amplifier 8, and the lighting lamp 16 is connected to the source current 11, dispersed | 5 kV In working out, Svetonepro. The baffle of the partition 15 prevents the light from the illumination lamp 16 from entering the photoresist 14 to X.

The device works as follows.

Before the beginning of the research, the equipment of the measuring station is made: a borehole or a hole is drilled, into which depth wells 1 are laid, and a guide sleeve 5 is mounted in the wellhead, by means of bolts b. Before starting the measurements, the optoelectronic device 3 is screwed onto the billet bar 4, connected to the power supply 11 and the amplifier 8, and then with the illuminated emitting lamp 16 reaches the depth frame 1. When the optoelectronic device is inserted: beam 1 into the depth frame the light from the lighting lamp 16, the passage through the hole 19, is reflected from the reflective surface 2 and, the passage through the holes 20, hits the photoresistor 14, the resistance of the photoresistor decreases and the current flowing to the input numerator 8.

This, in turn, leads to the fact that the output of the amplifier is in a b-. There is a current sufficient to trigger an electromagnetic relay 9, the coil of which is loaded with the amplifier 8. The operation of the relay 9 leads to the switching on of the signal lamp Y. At the moment of turning on this lamp, send. the optoelectronic device is stopped and the measurement is taken using a telescopic rack 7 with an indicator, then the optoelectronic device 3 inside the frame 1 is continued to be advanced and when the signal lamp is turned off, Yu is also measured using a telescopic rack 7, Such operations are repeated for each frame two times, first for the lower annular reflecting surface, and then for the upper one (when moving optoelectrically about the device from bottom to top). After removing the measurement on one depth frame, the railing of the railing bar is increased to the required length, and measurements are taken on the second, third, etc. benchmarks. The results of instrumental observations are recorded in the log of instrumental observations. The removal of measurements from the depth reference frames is carried out periodically, as the cleaning works move, under the influence of which the overlying rocks move, and hence the depth reference points with reflective surfaces. These displacements are determined with the help of a predetermined device, For a fixed reference point in this particular case, the Bhzmo accepts a bench mark embedded in the soil of a mine, or the uppermost deep bench mark that is outside the zone of displacement.

The described device for monitoring the displacement of rocks was used by the authors to study the behavior of the fractured roof of the seam, represented in the Main one by several layers of siltstone, which lies in the sandstone. To do this, a 60 mm diameter and 10 m long hole was drilled in the top of the clearing of the active lava at a distance of 60 m in front of the clearing side. surfaces. The development of ezh.iy pe5 couples bbsho c. within 0.9-1.1 m

A readout film was mounted at the mouth of the hole. Then, periodically within 97 days, with the help of the device proposed, the location of the depth reference points with reflective surfaces was determined. According to the results of instrumental observations, graphs of displacements of the layers of rocks, the main and immediate roofs of the MJQ formation, which were used to select a rational method of controlling the roofing of this formation, were plotted. The measurement accuracy was 0.1 mm.

The proposed device has the following advantages compared with the known.

1, Improves measurement accuracy.

2. The cost of making measurements is reduced by using light radiation instead of radioactive.

H. The laboriousness of the work is reduced by simplifying the design of the device.

4, Expands the area of use of the device.

The proposed device can be used in the mining industry to monitor the displacement

rocks arising from the development of them,

Claims (2)

1. USSR author's certificate number 385041, cl. B 21 C 39/00, 1970. 2. The author's certificate (USSR 128621, class C 01 C 15/04, 1959 (prototype). To the source of the white fk fogopriennik , x / x FIG. / h 2