CN110985125A - Deep well soft coal rock burst disaster monitoring and early warning system and early warning method thereof - Google Patents
Deep well soft coal rock burst disaster monitoring and early warning system and early warning method thereof Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 104
- 239000011435 rock Substances 0.000 title claims abstract description 38
- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000006073 displacement reaction Methods 0.000 claims abstract description 90
- 238000012545 processing Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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Abstract
The invention is applicable to the technical field of mine disaster early warning, and provides a deep well soft coal rock burst disaster monitoring and early warning system and an early warning method thereof, wherein a stress sensor for detecting the pressure value of a drill hole and a displacement sensor for detecting the displacement value generated during the deformation of a roadway wall are arranged, three stress early warning signals respectively including a first green early warning signal, a first yellow early warning signal and a first red early warning signal and two preset early warning pressure values respectively including a first early warning pressure value and a second early warning pressure value are also arranged, three displacement early warning signals respectively including a second green early warning signal, a second yellow early warning signal and a second red early warning signal and two preset early warning pressure values respectively including a first early warning pressure value and a second early warning pressure value are also arranged, and a stress early warning index issues corresponding stress early warning according to the displacement values, so that the invention can issue early warning according to the comprehensive data of the drill hole pressure value and the deformation condition of the roadway, the accuracy is higher.
Description
Technical Field
The invention belongs to the technical field of mine disaster early warning, and particularly relates to a deep well soft coal rock burst disaster monitoring and early warning system and an early warning method thereof.
Background
According to the common knowledge of people, the soft coal is a coal body which is soft, easy to deform, low in elastic modulus and free of impact, and does not have the coal rock strength condition for generating rock burst at all, so that the rock burst can not be generated. However, with the increasing depth and intensity of mine mining, rock burst gradually evolves from being exclusively hard coal to being shared by soft and hard coal. The soft coal rock burst disaster concealment is strong, and harder coal is dangerous. The monitoring and early warning of rock burst disasters is one of effective prevention and control methods, and the methods for monitoring and early warning of mine rock burst disasters mainly comprise a drilling cutting method, a stress monitoring method, a vibration monitoring method, an electromagnetic radiation method and the like.
The early warning methods and the early warning equipment have good effects on monitoring and early warning of mine rock burst disasters, but mainly focus on the aspect of monitoring hard coal rock burst disasters, and have obvious defects in the aspect of monitoring and early warning of soft coal rock burst disasters, and the drilling cutting method, the electromagnetic radiation method and the vibration monitoring method are not capable of monitoring soft coal rock burst disasters, have larger errors and are interfered greatly in soft coal rock burst monitoring. Stress monitoring methods, while capable of monitoring general areas where there is a risk of impact, are less accurate.
Disclosure of Invention
The invention provides a deep well soft coal rock burst disaster monitoring and early warning system and an early warning method thereof, and aims to solve the problems of obvious defects, large errors and poor accuracy in the aspect of soft coal rock burst disaster monitoring and early warning in the prior art.
The invention is realized in this way, a deep well soft coal rock burst disaster monitoring and early warning system and its early warning method, including data monitoring module and data processing module;
the data monitoring module comprises a stress sensor and a displacement sensor, the stress sensor is used for detecting the pressure value of the drill hole, and the displacement sensor is used for detecting the displacement value generated when the roadway wall deforms;
the data processing module includes monitoring host computer, ground monitoring host computer and data processing host computer in the pit, stress sensor with displacement sensor's output is all connected the input of monitoring host computer in the pit, the monitoring host computer in the pit is used for receiving the pressure value that stress sensor detected with the displacement value that displacement sensor detected, the input of ground monitoring host computer is connected the output of monitoring host computer in the pit, the monitoring host computer in the pit will the pressure value with the displacement value transmits to the ground monitoring host computer and passes through the storage of ground monitoring host computer, the output of ground monitoring host computer is connected the data processing host computer.
The invention also provides a preferable mode, the data monitoring module further comprises a junction box, and the junction box is electrically connected with the stress sensor, the displacement sensor and the underground monitoring host.
The invention also provides a preferable mode, the data processing module further comprises a battery, and the battery is used for providing a power source for the downhole monitoring host, the stress sensor and the displacement sensor.
The invention also provides a preferable mode, wherein the stress sensor comprises a borehole stress meter and a pressure transmitter, the borehole stress meter is used for detecting the pressure of the borehole, and the pressure transmitter is used for converting the pressure value of the borehole stress meter into an electric signal.
The invention also provides a preferable mode, the displacement sensor comprises a displacement meter and a transmitter, the displacement meter comprises a cylinder barrel, a steel wire and a piston, the piston is positioned in the cylinder barrel and is movably connected with the cylinder barrel, one end of the piston is connected with one end of the steel wire, the cylinder barrel is communicated with a pressure sensor for detecting the change of the air pressure in the cylinder barrel, the pressure sensor transmits the detected pressure change value to the transmitter, and the transmitter converts the pressure change value into an electric signal of the corresponding displacement value.
The invention also provides a preferable mode, and the inside of the cylinder barrel is filled with inert gas.
The invention also provides a preferable mode, the underground monitoring host is connected with a photoelectric conversion system, the photoelectric conversion system is connected with the ground monitoring host through an optical cable, and the photoelectric conversion system is used for converting the pressure value information and the displacement value information in the form of digital signals into optical signals.
The invention also provides a deep well soft coal rock burst disaster monitoring and early warning method which is suitable for any one of the deep well soft coal rock burst disaster monitoring and early warning systems and comprises the following steps:
1) detecting a drilling pressure value, setting three stress early warning signals which are respectively a first green early warning signal, a first yellow early warning signal and a first red early warning signal and two preset early warning pressure values which are respectively a first early warning pressure value and a second early warning pressure value, and detecting a displacement value generated when the roadway wall is deformed when the pressure value is not less than the first early warning pressure value;
2) the method comprises the steps that three displacement early warning signals of a second green early warning, a second yellow early warning and a second red early warning are set respectively, and two preset early warning pressure values of a first early warning pressure value and a second early warning pressure value are set respectively, when the roadway wall deforms, a produced displacement value is smaller than the first early warning displacement value, the second green early warning is issued, when the displacement value is not smaller than the first early warning displacement value and smaller than the second early warning displacement value, the second yellow early warning is issued, and when the displacement value is not smaller than the second red early warning is issued when the displacement value is not smaller than the second early warning displacement value.
Compared with the prior art, the invention has the beneficial effects that: the invention discloses a tunnel wall deformation early warning device, which comprises a stress sensor for detecting the pressure value of a drill hole, a displacement sensor for detecting the displacement value generated during the deformation of the tunnel wall, three stress early warning signals respectively including a first green early warning signal, a first yellow early warning signal and a first red early warning signal, two preset early warning pressure values respectively including a first early warning pressure value and a second early warning pressure value, three displacement early warning signals respectively including a second green early warning signal, a second yellow early warning signal and a second red early warning signal, and two preset early warning pressure values respectively including a first early warning pressure value and a second early warning pressure value, wherein a stress early warning index issues a corresponding stress early warning according to the displacement values, and when the stress early warning signals include the first yellow early warning signal and the first red early warning signal, the corresponding displacement early warning is issued according to the displacement values and the displacement early warning index and serves as a final early warning signal, so that the tunnel wall deformation comprehensive data can be issued according to the drilling pressure, the accuracy is higher.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural diagram of the displacement sensor of the present invention.
FIG. 3 is a flow chart of the deep well soft coal rock burst disaster monitoring and early warning method of the invention
In the figure: 1-data monitoring module, 11-stress sensor, 12-displacement sensor, 121-transmitter, 122-cylinder, 123-steel wire, 124-piston, 13-junction box, 2-data processing module, 21-downhole monitoring host, 22-ground monitoring host, 23-data processing host and 24-battery.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-2, the present embodiment provides a technical solution: a deep well soft coal rock burst disaster monitoring and early warning system comprises a data monitoring module 1 and a data processing module 2.
The data monitoring module 1 comprises a stress sensor 11, a displacement sensor 12 and a junction box 13, the stress sensor 11 is used for detecting the pressure value of a drilled hole, the displacement sensor 12 is used for detecting the displacement value generated when the wall of a roadway deforms, the roadway deforms mainly into horizontal displacement generated by the roadway side in the roadway, and the junction box 13 is electrically connected with the stress sensor 11, the displacement sensor 12 and the underground monitoring host 21.
The stress sensor 11 comprises a borehole stress meter and a pressure transmitter, the borehole stress meter is used for detecting the pressure of a borehole, the pressure transmitter is used for converting the pressure value of the borehole stress meter into an electric signal, the displacement sensor 12 comprises a displacement meter and a transmitter 121, the displacement meter comprises a cylinder 122, a steel wire 123 and a piston 124, the piston 124 is located in the cylinder 122 and is movably connected with the cylinder 122, one end of the piston 124 is connected with one end of the steel wire 123, the cylinder 122 is communicated with a pressure sensor used for detecting the change of the air pressure in the cylinder 122, the pressure sensor transmits the detected pressure change value to the transmitter 121, the transmitter 121 converts the pressure change value into an electric signal of a corresponding displacement value, and the cylinder 122 contains inert gas.
The data monitoring module 1 is provided with a plurality of borehole stressometers, the borehole stressometers are arranged in deep and relatively stable soft rock, the pressure transmitter and the borehole stressometers are connected and arranged on the wall of a roadway, and the stress sensor 11 is connected with the underground monitoring host 21 through a cable. After the roadway deforms, the stainless steel wire 123 is driven to outwards pull the piston 124, so that the volume of inert high-pressure gas in the cylinder barrel 122 is increased, the air pressure is reduced, the change of the air pressure is captured by the external transmitter 121, the transmitter adopts a pressure transmitter, a displacement signal is converted into an electric signal, and the displacement sensor 12 is connected with the underground monitoring host 21 through a cable.
The data processing module 2 comprises an underground monitoring host 21, a ground monitoring host 22, a data processing host 23 and a battery 24, wherein the output ends of the stress sensor 11 and the displacement sensor 12 are connected with the input end of the underground monitoring host 21, the underground monitoring host 21 is used for receiving a pressure value detected by the stress sensor 11 and a displacement value detected by the displacement sensor 12, the input end of the ground monitoring host 22 is connected with the output end of the underground monitoring host 21, the underground monitoring host 21 transmits the pressure value and the displacement value to the ground monitoring host 22 and stores the pressure value and the displacement value through the ground monitoring host 22, the output end of the ground monitoring host 22 is connected with the data processing host 23, in order to realize 24-hour uninterrupted continuous operation of the monitoring system, the underground monitoring system must be provided with a necessary power supply battery 24 so as to immediately supply power to the system when the monitoring system is powered off and maintain normal operation of the system, and, The stress sensor 11 and the displacement sensor 12 provide a source of electrical power.
The underground monitoring host 21 is connected with a photoelectric conversion system, the photoelectric conversion system is connected with the ground monitoring host 22 through an optical cable, and the photoelectric conversion system is used for converting pressure value information and displacement value information in a digital signal form into optical signals. The deep well soft coal rock burst disaster monitoring and early warning system has the characteristics of remote monitoring and operation, so that the signal transmission distance is longer. The optical cable transmission technology is adopted, wherein the key component is a photoelectric conversion system, and the photoelectric conversion system converts a digital signal into an optical signal to realize long-distance non-attenuation transmission.
The underground monitoring host 21 can monitor the soft rock stress and roadway deformation conditions of the dangerous area in real time on line, convert the acquired analog signals into digital data, and store and transmit the digital data to the ground monitoring host 22. The main parts in the device are an industrial fixed plate, a CPU board card, a collection card, a hard disk, an I/V conversion plate and the like. All the components are arranged in a closed box body with an explosion-proof function. The uphole monitoring host 22 is primarily responsible for data storage tasks from downhole transmission to provide support for surface data processing, such as report formation of analytical data and compilation of analytical reports. The data processing host 23 is used as a remote control system and mainly responsible for changing system monitoring parameters, remote control, data analysis and the like.
In conclusion, the invention can synchronously monitor two sensitive indexes of stress and roadway deformation and is suitable for soft coal. And carrying out early warning and forecasting on rock impact dangerousness. The method comprises the steps of firstly, respectively acquiring stress and roadway deformation monitoring data in a monitoring point arrangement area, screening out an area with a large stress concentration degree, then, performing comprehensive calculation by combining roadway deformation data and adopting a related algorithm, and finally, giving out the dangerous situation of rock burst in the monitoring area, wherein the dangerous situation is divided into three early warning levels of green, yellow and red.
The monitoring and early warning system has the following characteristics: the one-time monitoring coverage is large, the number of the stress and displacement monitoring points is more than 30, and the device can be conveniently moved along with the propulsion of underground engineering. The maximum number of the acquisition channels is not less than 40, and the method can be expanded according to actual conditions. Can realize 24-hour uninterrupted monitoring. And data are transmitted in real time, dangerous states (dangerous positions and time) are automatically processed and displayed, and the implementation effect of rock burst measures can be checked and eliminated. The range of the pressure sensor is 0-60 MPa, and the precision is 0.01 MPa. The displacement sensor has the measuring range of 0-6 m and the precision of 0.001 m. All circuits adopt intrinsic safety design, and all underground components reach explosion-proof standards. The underground data transmission distance is larger and is not less than 10km, and the underground data transmission distance can be linked to a network for real-time remote monitoring. And a photoelectric conversion technology is adopted, and communication is carried out based on a mine network information system. The sampling rate is adjustable and is not lower than 250 KS/s. The data acquisition time interval is adjustable within 1 s-10 min. The software operation can be remotely monitored and realized. The environment temperature is 0 to +40 ℃, the average relative humidity is less than 95% (+25 ℃), and the atmospheric pressure is 85 to 110 kPa.
The nutrient solution is then prepared according to the following steps, please refer to fig. 3:
1) detecting a drilling pressure value, setting three stress early warning signals respectively as a first green early warning signal, a first yellow early warning signal and a first red early warning signal and two preset early warning pressure values respectively as a first early warning pressure value and a second early warning pressure value through the data processing host 23, and detecting a displacement value generated when the roadway wall is deformed when the pressure value is not less than the first early warning pressure value;
2) three displacement early warning signals which are respectively a second green early warning, a second yellow early warning and a second red early warning and two preset early warning pressure values which are respectively a first early warning pressure value and a second early warning pressure value are set through the data processing host 23, when the displacement value generated during the deformation of the roadway wall is smaller than the first early warning displacement value, the second green early warning is issued, when the displacement value is not smaller than the first early warning displacement value and smaller than the second early warning displacement value, the second yellow early warning is issued, when the displacement value is not smaller than the second early warning displacement value, the second red early warning is issued, and the early warning signals issued in the step are final early warning signals for providing accident early warning for related personnel.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a deep well soft coal rock burst calamity monitoring early warning system which characterized in that: comprises a data monitoring module (1) and a data processing module (2);
the data monitoring module (1) comprises a stress sensor (11) and a displacement sensor (12), wherein the stress sensor (11) is used for detecting the pressure value of a drill hole, and the displacement sensor (12) is used for detecting the displacement value generated when the wall of the roadway deforms;
the data processing module (2) comprises an underground monitoring host (21), a ground monitoring host (22) and a data processing host (23), the stress sensor (11) and the output end of the displacement sensor (12) are connected with the input end of the underground monitoring host (21), the underground monitoring host (21) is used for receiving the pressure value detected by the stress sensor (11) and the displacement value detected by the displacement sensor (12), the input end of the ground monitoring host (22) is connected with the output end of the underground monitoring host (21), the underground monitoring host (21) transmits the pressure value and the displacement value to the ground monitoring host (22) and passes through the storage of the ground monitoring host (22), and the output end of the ground monitoring host (22) is connected with the data processing host (23).
2. The deep well soft coal rock burst disaster monitoring and early warning system of claim 1, wherein: the data monitoring module (1) further comprises a junction box (13), and the junction box (13) is electrically connected with the stress sensor (11), the displacement sensor (12) and the underground monitoring host (21).
3. The deep well soft coal rock burst disaster monitoring and early warning system of claim 1, wherein: the data processing module (2) further comprises a battery (24), and the battery (24) is used for providing a power source for the downhole monitoring host (21), the stress sensor (11) and the displacement sensor (12).
4. The deep well soft coal rock burst disaster monitoring and early warning system of claim 1, wherein: the stress sensor (11) comprises a borehole stress meter and a pressure transmitter, wherein the borehole stress meter is used for detecting the pressure of the borehole, and the pressure transmitter is used for converting the pressure value of the borehole stress meter into an electric signal.
5. The deep well soft coal rock burst disaster monitoring and early warning system of claim 1, wherein: the displacement sensor (12) comprises a displacement meter and a transmitter (121), the displacement meter comprises a cylinder barrel (122), a steel wire (123) and a piston (124), the piston (124) is located in the cylinder barrel (122) and is movably connected with the cylinder barrel (122), one end of the piston (124) is connected with one end of the steel wire (123), the cylinder barrel (122) is communicated with a pressure sensor used for detecting the change of air pressure in the cylinder barrel (122), the pressure sensor transmits a detected pressure change value to the transmitter (121), and the transmitter (121) converts the pressure change value into a corresponding electric signal of the displacement value.
6. The deep well soft coal rock burst disaster monitoring and early warning system of claim 5, wherein: the cylinder (122) contains inert gas.
7. The deep well soft coal rock burst disaster monitoring and early warning system as claimed in claim 4 or 5, wherein: the underground monitoring host (21) is connected with a photoelectric conversion system, the photoelectric conversion system is connected with the ground monitoring host (22) through an optical cable, and the photoelectric conversion system is used for converting pressure value information and displacement value information in a digital signal form into optical signals.
8. A deep well soft coal rock burst disaster monitoring and early warning method is applicable to any one of the deep well soft coal rock burst disaster monitoring and early warning systems in claims 1 to 5, and is characterized in that: the method comprises the following steps:
1) detecting a drilling pressure value, setting three stress early warning signals which are respectively a first green early warning signal, a first yellow early warning signal and a first red early warning signal and two preset early warning pressure values which are respectively a first early warning pressure value and a second early warning pressure value, and detecting a displacement value generated when the roadway wall is deformed when the pressure value is not less than the first early warning pressure value;
2) the method comprises the steps that three displacement early warning signals of a second green early warning, a second yellow early warning and a second red early warning are set respectively, and two preset early warning pressure values of a first early warning pressure value and a second early warning pressure value are set respectively, when the roadway wall deforms, a produced displacement value is smaller than the first early warning displacement value, the second green early warning is issued, when the displacement value is not smaller than the first early warning displacement value and smaller than the second early warning displacement value, the second yellow early warning is issued, and when the displacement value is not smaller than the second red early warning is issued when the displacement value is not smaller than the second early warning displacement value.
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| NL2029129B1 (en) * | 2021-09-06 | 2023-03-21 | Shandong Coal Geological Planning And Exploration Res Institute | Monitoring device for a rock burst in a coal mine |
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Application publication date: 20200410 |