CN104912552A - Coal-rock mass ground stress distribution feature detection method and coal-rock mass ground stress distribution feature detection device - Google Patents
Coal-rock mass ground stress distribution feature detection method and coal-rock mass ground stress distribution feature detection device Download PDFInfo
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- CN104912552A CN104912552A CN201510268600.0A CN201510268600A CN104912552A CN 104912552 A CN104912552 A CN 104912552A CN 201510268600 A CN201510268600 A CN 201510268600A CN 104912552 A CN104912552 A CN 104912552A
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Abstract
The invention provides a coal-rock mass ground stress distribution feature detection method and a coal-rock mass ground stress distribution feature detection device. Two parallel drill holes with the same length are constructed into a coal-rock layer in an underground point to be tested; a plurality of transmitting transducers are arranged at intervals in the middle of one drill hole; a plurality of receiving transducers are arranged at intervals in the middle of the other drill hole; signals are converted into ultrasonic waves through the transmitting transducers; the ultrasonic waves are transmitted to the corresponding receiving transducers by using a coal-rock mass as a medium; the receiving transducers convert the received ultrasonic waves into electric pulses; the electric pulses are transmitted back to a signal receiver arranged in a signal transmitting and sending control host through a cable; the ground stress distribution features in the coal-rock layer in front of a working face or roadway surrounding rock are subjected to regional detection; the located position of the ground stress peak is clearly defined; during the mining operation, the ground stress concentration region can be avoided, or the prevention measure can be taken in time; important significance is realized on underground impact ground pressure occurrence prevention and mining working face coal and gas outburst danger prediction; and the large-scale regional ground stress distribution detection can be completed in one step.
Description
Technical field
The present invention relates to a kind of coal-rock mass ground stress distribution characteristics detection method and device, be especially a kind ofly applicable to detect around coal mine down-hole tunnel or the method for the distribution characteristics of work plane front geostatic stress and device.
Background technology
Along with the increase of China's coal-mine mining depth, the Burst Tendency of coal seam and country rock strengthens, very easily rock blast hazard is there is in the high-ground stress region of roadway or work plane, and easily lure that coal and gas prominent occurs in the coal seam with outburst hazard into, this causes great threat to the life security of Safety of Coal Mine Production and vast Coal Mine Staff.We know, around roadway or work plane, the stress distribution of coal and rock and bump has close relationship, and the peak value of geostatic stress is larger, nearer apart from work plane, rock blast hazard more easily occurs, brings out coal and gas prominent.Therefore, accurately and timely the stress distribution in the coal and rock of work plane front is detected, identified sign concentrated area, to predicting that gas outburst risk, control rock blast hazard are significant.The domestic and international test to geostatic stress is at present generally point prediction pattern, is difficult to test on a large scale, more difficultly carries out regionality detection to the stress distribution feature in coal and rock, and the present invention proposes a kind of detection method of simple possible at this point.
Summary of the invention
Technical problem: the object of the invention is to solve in current detecting earth stress technology, little to the detection single scope of the surrouding rock stress distribution characteristics of tunnel or getting working face, wanting feasible region property to detect on a large scale needs repeatedly to carry out, effort, time-consuming problem, there is provided a kind of easy and simple to handle, disposablely can complete method and the device of the detection of surrouding rock stress distribution characteristics regionality.
Technical scheme: coal-rock mass ground stress distribution characteristics detection method of the present invention, comprises the following steps:
A, to construct in coal rock layer two isometric and parallel borings in down-hole pilot to be measured, between described two borings, vertical distance is 5 ~ 15m;
B, in the hard socket that equal with drillable length, a transmitting transducer is set every distance L2 in advance, in the hard socket that another root is equal with drillable length, a receiving transducer is set every distance L2, then two hard sockets are inserted respectively in two isometric and parallel borings, and make transmitting transducer near aperture and receiving transducer be 0.5m apart from the distance L1 in aperture;
C, respectively to two boring in inject and inspect agent;
D, all transmitting transducers and receiving transducer to be connected by cable and the signal transmitting and receiving main control system be located at outside boring, then enabling signal transmitting-receiving main control system;
Signal transmitter in e, signal transmitting and receiving main control system produces electric impulse signal, and convert ultrasonic wave to by transmitting transducer, ultrasonic wave will be that medium synchronous transmission is to receiving transducer corresponding thereto with coal and rock, receiving transducer converts the ultrasonic wave received to electric pulse, and returns the signal receiver in signal transmitting and receiving main control system by cable transmission;
F. the many groups electric impulse signal received is transferred to the signal processing system in transmitting-receiving main control system by signal receiver, signal processing system will process electric impulse signal and store, convert electric impulse signal to acoustic velocity, calculated the geostatic stress distribution characteristics demonstrated between two borings by " velocity of wave-stress " relation.
Realize a coal-rock mass ground stress distribution characteristics sniffer for said method, comprise signal transmitting and receiving main control system, transmitting transducer, receiving transducer, hard socket and cable; Described signal transmitting and receiving main control system is made up of signal transmitter, signal receiver and signal processing system, described signal transmitter is connected with the multiple transmitting transducers be located in a hard socket by cable, continual and steady generation electric impulse signal, described signal receiver is then connected with the multiple receiving transducers be located in another root hard socket by cable, sends the electric impulse signal collected to signal processing system.
A described hard socket is interior is that 0.5m ~ 1m installs a transmitting transducer every distance L2, and another root hard socket is interior is that 0.5m ~ 1m installs one or receiving transducer every distance L2.
Describedly be located at multiple transmitting transducers in a hard socket by cable series connection, convert electric impulse signal to ultrasonic signal.
Describedly be located at multiple receiving transducers in another root hard socket by cable series connection, convert the ultrasonic wave received to electric impulse signal.
Beneficial effect: owing to have employed technique scheme, certain corresponding relation is there is in the present invention according to the structure of sound wave amplitude, frequency spectrum and rock and stress state, along with the degree of crushing of coal and rock increase, springy texture, stress reduces, sound wave can corresponding generation velocity of wave reduce, the change of amplitude reduction.Regionality detection can be carried out to the geostatic stress distribution characteristics of Surrounding Rock Masses of Roadway or work plane front coal rock layer, peak stress position clearly, and then when underground coal mine carries out digging operation, geostatic stress concentrated area can be avoided or take preventive measures in time, to the generation of prevention down-hole bump and the coal and gas prominent danger forecasting important in inhibiting of getting working face.Compared with existing similar technique, to the geostatic stress distribution characteristics in Surrounding Rock Masses of Roadway stress or work plane front, disposablely can complete extensive, regional detection, time saving and energy saving, efficiently quick.Its method is easy, easy to operate, and the device adopted is simple, and result of use is good, has practicality widely in the art.
Accompanying drawing explanation
Fig. 1 is structural configuration schematic diagram of the present invention.
In figure: 1-signal transmitting and receiving main control system, 2-transmitting transducer, 3-receiving transducer, 4-hard socket, 5-cable, 6-holes, 7-signal transmitter, 8-signal processing system, 9-signal receiver.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
As shown in Figure 1, coal-rock mass ground stress distribution characteristics detection method of the present invention, there is certain corresponding relation according to the structure of sound wave amplitude, frequency spectrum and rock and stress state, namely along with the degree of crushing of coal and rock increase, springy texture, stress reduce, sound wave can corresponding generation velocity of wave reduces, amplitude reduces change, and concrete operation step is as follows:
A, to construct in coal rock layer two isometric and parallel borings 6 in down-hole pilot to be measured, described two borings 6 vertical distances are 5 ~ 15m;
B, in advance one be that 0.5 ~ 1m arranges a transmitting transducer 2 every distance L2 in the equal hard socket 4 of boring 6 length, another root be that 0.5 ~ 1m arranges a receiving transducer 3 every distance L2 in the equal hard socket 4 of boring 6 length, then two hard sockets 4 are inserted respectively in two isometric and parallel borings 6, and make transmitting transducer 2 near aperture and receiving transducer 3 be 0.5m apart from the distance L1 in aperture;
C, respectively to two boring 6 in inject and inspect agent, in order to ensure the accuracy of test signal, guarantee to be full of couplant between the hole wall of boring 6 and hard socket 4.
D, all transmitting transducers 2 and receiving transducer 3 to be connected by cable 5 and the signal transmitting and receiving main control system 1 be located at outside boring, then enabling signal transmitting-receiving main control system 1;
Signal transmitter 7 in e, signal transmitting and receiving main control system 1 will produce electric impulse signal, and convert ultrasonic wave to by transmitting transducer 2, ultrasonic wave will be that medium synchronous transmission is to receiving transducer 3 corresponding thereto with coal and rock, receiving transducer 3 converts the ultrasonic wave received to electric pulse, and transmits back the signal receiver 9 in signal transmitting and receiving main control system 1 by cable 5;
F. the many groups electric impulse signal received is transferred to the signal processing system 8 in transmitting-receiving main control system 1 by signal receiver 9, signal processing system 8 will process electric impulse signal and store, and convert electric impulse signal to acoustic velocity, and calculate by the corresponding relation of " velocity of wave-stress " the geostatic stress distribution characteristics demonstrated between two borings 6, thus regionality detection is carried out to the geostatic stress distribution characteristics in Surrounding Rock Masses of Roadway or work plane front coal rock layer, peak stress position clearly.Usual velocity of wave more quickly stress is larger, the velocity of wave of the diverse location test in boring, then geostatic stress is maximum for the fastest position of velocity of wave, then geostatic stress is minimum for the slowest position of velocity of wave, the magnitude relationship of all diverse location places geostatic stress can be determined successively according to the corresponding relation of " velocity of wave-stress ", thus the position at identified sign peak value place.
Realize the coal-rock mass ground stress distribution characteristics sniffer of said method, comprise signal transmitting and receiving main control system 1, transmitting transducer 2, receiving transducer 3, hard socket 4 and cable 5; Described signal transmitting and receiving main control system 1 is made up of signal transmitter 7, signal receiver 9 and signal processing system 8, described signal transmitter 7 is connected with the multiple transmitting transducers 2 be located in a hard socket 4 by cable 5, continual and steady generation electric impulse signal, a described hard socket 4 is interior is that 0.5m ~ 1m installs a transmitting transducer 2 every distance L2, the transmitting transducer 2 be located in a hard socket 4 is together in series by cable 5, converts electric impulse signal to ultrasonic signal.Described signal receiver 9 is connected with the multiple receiving transducers 3 be located in another root hard socket 4 by cable 5, and another root hard socket 4 is interior is that 0.5m ~ 1m installs a receiving transducer 3 every distance L2.Send the electric impulse signal collected to signal processing system 8.The described receiving transducer 3 be located in another root hard socket 4 is together in series by cable 5, converts the ultrasonic wave received to electric impulse signal.
Claims (5)
1. a coal-rock mass ground stress distribution characteristics detection method, is characterized in that comprising the following steps:
A, to construct in coal rock layer two isometric and parallel borings (6) in down-hole pilot to be measured, between described two borings (6), vertical distance is 5 ~ 15m;
B, with the equal hard socket (4) of boring (6) length, a transmitting transducer (2) is set at one every distance L2 in advance, in the hard socket (4) that another root is equal with boring (6) length, a receiving transducer (3) is set every distance L2, then two hard sockets (4) are inserted respectively in two isometric and parallel borings (6), and make the distance L1 in transmitting transducer (2) near aperture and receiving transducer (3) distance aperture be 0.5m;
C, respectively to inject and inspect agent in two borings (6);
D, all transmitting transducers (2) and receiving transducer (3) to be connected by cable (5) and the signal transmitting and receiving main control system (1) be located at outside boring, then enabling signal transmitting-receiving main control system (1);
Signal transmitter (7) in e, signal transmitting and receiving main control system (1) produces electric impulse signal, and convert ultrasonic wave to by transmitting transducer (2), ultrasonic wave will be that medium synchronous transmission is to receiving transducer (3) corresponding thereto with coal and rock, receiving transducer (3) converts the ultrasonic wave received to electric pulse, and transmits back the signal receiver (9) in signal transmitting and receiving main control system (1) by cable (5);
F. the many groups electric impulse signal received is transferred to the signal processing system (8) in transmitting-receiving main control system (1) by signal receiver (9), signal processing system (8) will process electric impulse signal and store, convert electric impulse signal to acoustic velocity, calculate by the corresponding relation of " velocity of wave-stress " the geostatic stress distribution characteristics demonstrated between two borings (6).
2. realize a coal-rock mass ground stress distribution characteristics sniffer for method described in claim 1, comprise signal transmitting and receiving main control system (1), transmitting transducer (2), receiving transducer (3), hard socket (4) and cable (5); It is characterized in that: described signal transmitting and receiving main control system (1) is made up of signal transmitter (7), signal receiver (9) and signal processing system (8), described signal transmitter (7) is connected with the multiple transmitting transducers (2) be located in a hard socket (4) by cable (5), continual and steady generation electric impulse signal, described signal receiver (9) is then connected with the multiple receiving transducers (3) be located in another root hard socket (4) by cable (5), the electric impulse signal collected is sent to signal processing system (8).
3. coal-rock mass ground stress distribution characteristics sniffer according to claim 2, it is characterized in that: a described hard socket (4) is interior is that 0.5m ~ 1m installs a transmitting transducer (2) every distance L2, another root hard socket (4) is interior is that 0.5m ~ 1m installs a receiving transducer (3) every distance L2.
4. coal-rock mass ground stress distribution characteristics sniffer according to claim 2, it is characterized in that: described in the multiple transmitting transducers (2) be located in a hard socket (4) be together in series by cable (5), convert electric impulse signal to ultrasonic signal.
5. coal-rock mass ground stress distribution characteristics sniffer according to claim 2, it is characterized in that: described in the multiple receiving transducers (3) be located in another root hard socket (4) be together in series by cable (5), convert the ultrasonic wave received to electric impulse signal.
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Cited By (5)
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| CN107489453A (en) * | 2017-07-13 | 2017-12-19 | 临沂大学 | First advance coal body damage monitoring method under the influence of a kind of mining induced stress |
| CN107561161A (en) * | 2017-07-24 | 2018-01-09 | 中国矿业大学 | A kind of method for early warning of the disconnected release of the old bursting in colliery |
| CN107989652A (en) * | 2017-12-18 | 2018-05-04 | 北京科技大学 | Rock mass energy flow monitor |
| CN114061815A (en) * | 2021-11-29 | 2022-02-18 | 山东大学 | Tunnel ground stress direction testing device and method based on rock mass acoustic signals |
| CN114486023A (en) * | 2022-01-19 | 2022-05-13 | 重庆交通大学 | Three-dimensional space stress characterization method for underground engineering disturbance surrounding rock area |
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| CN114486023B (en) * | 2022-01-19 | 2022-11-25 | 重庆交通大学 | Three-dimensional space stress characterization method for underground engineering disturbance surrounding rock area |
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Application publication date: 20150916 |