CN215566120U

CN215566120U - Mine pressure monitoring system for mine tunnel

Info

Publication number: CN215566120U
Application number: CN202121987844.1U
Authority: CN
Inventors: 高永祥; 袁向前
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-01-18
Anticipated expiration: 2031-08-23

Abstract

The utility model relates to the technical field of mine pressure monitoring systems, and particularly discloses a mine pressure monitoring system for a mine roadway; the technical scheme comprises an optical fiber top plate separation layer sensor, an optical fiber anchor rod stress sensor, an optical fiber drilling hole stress sensor and an optical fiber roadway convergence displacement sensor; a first mounting hole is formed in the monitoring point position in the rock stratum, a steel wire rope is arranged in the first mounting hole, one end of the steel wire rope is anchored in the rock stratum, and the other end of the steel wire rope penetrates through the top plate and is connected with the top plate separation layer sensor; the optical fiber anchor rod stress sensor is fixed in the rock stratum through the anchor rod; a third mounting hole which is horizontally arranged is arranged at a monitoring point of the drilling stress in the rock stratum, and an oil pressure bag, an oil guide pipe and a sensor are sequentially arranged in the third mounting hole from inside to outside; the mine pressure monitoring system can realize real-time online monitoring of mine pressure and displacement, is not interfered by an electromagnetic field, has high monitoring precision, long transmission distance and high reliability, and solves the problems of poor monitoring reliability, incapability of timely and accurately feeding back a monitoring result and potential safety hazard in the prior art.

Description

Mine pressure monitoring system for mine tunnel

Technical Field

The utility model belongs to the technical field of mine pressure monitoring systems, and particularly relates to a mine pressure monitoring system for a mine roadway.

Background

Safety monitoring of mine roadway roofs and surrounding rocks is an important project for mine disaster prediction, collapse of mine roof collapse surrounding rocks is one of the most serious disasters of various mines, production safety of the mines is seriously threatened, and huge economic loss and casualties can be caused when the collapse occurs. In recent years, due to the continuous extension of a tunneling surface and the expansion of an exploitation range, mine production is developing to the depth, roof collapse and collapse are increasingly serious, prevention and treatment tasks are also increasingly difficult, and mine roof disasters seriously threaten the life safety of mine miners.

The mine pressure observation instrument generally comprises a graduated scale, a slope observation rod, a pressure gauge, a hydraulic support pressure retraction self-recording instrument, a roof dynamic instrument, a chart pressure recorder and the like. At present, the measuring working efficiency of the instruments is low, the monitoring reliability is poor, only the original manual observation record can be relied on, and the current mine pressure observation instrument can not feed back the monitoring result timely and accurately, so that the potential safety hazard exists.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes the defects of the prior art, and solves the technical problems that: the mine pressure monitoring system for the mine roadway can realize real-time online monitoring of physical information such as pressure, displacement and the like of a monitoring point, has an early warning function on disasters, and provides technical support for guaranteeing life and property safety.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

a mine pressure monitoring system for a mine roadway is characterized by comprising a top plate separation layer sensor based on an optical fiber grating, an optical fiber anchor rod stress sensor, an optical fiber drilling hole stress sensor and an optical fiber roadway convergence displacement sensor; a first mounting hole is formed in the position of a monitoring point of a tunneling working surface in a rock stratum, a steel wire rope is arranged in the first mounting hole, one end of the steel wire rope is anchored in the rock stratum, the other end of the steel wire rope penetrates through a top plate and is connected with the top plate separation layer sensor based on the fiber bragg grating, and the top plate separation layer sensor based on the fiber bragg grating is fixed on the top plate; the optical fiber anchor rod stress sensor is fixed in a rock stratum through an anchor rod, one end of the anchor rod is anchored in the rock stratum, the other end of the anchor rod penetrates through a top plate, a tray is arranged at the end part of the anchor rod, a through hole is formed in the optical fiber anchor rod stress sensor, a section of the anchor rod, which is located below the tray, is arranged in the through hole, and the optical fiber anchor rod stress sensor is fixed below the tray through a nut; the monitoring point position of drilling stress is equipped with the third mounting hole in the stratum, the third mounting hole sets up for the level, optical fiber drilling stress sensor includes the sensor, leads oil pipe and oil pressure package, set gradually the oil pressure package in the third mounting hole from inside to outside, lead oil pipe and sensor, optical fiber tunnel convergence displacement sensor passes through the installing support to be fixed on the roof.

Furthermore, the first mounting holes are arranged every 50 meters on the underground mining and tunneling working face, and the depth of the first mounting holes is 2-6 meters.

Further, the diameter of the anchor rod is 25 mm.

Furthermore, the diameter of the third mounting hole is 42 mm-46 mm.

Furthermore, the top plate separation layer sensor based on the fiber bragg grating, the fiber anchor rod stress sensor, the fiber drilling stress sensor and the fiber roadway convergence displacement sensor are connected with a fiber bragg grating demodulator through optical cables, the fiber bragg grating demodulator is connected with a controller, and the controller is connected with a liquid crystal display.

Further, the model of the top plate delamination sensor based on the fiber grating is KGL 10; the model of the optical fiber anchor rod stress sensor is KGM 300; the model of the optical fiber drilling stress sensor is KGZ 30; the type of the optical fiber roadway convergence displacement sensor is KGW 50; the model of the fiber grating demodulator is YGSJ 12.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model adopts the optical fiber sensor, takes laser as an information carrier, takes the optical fiber as a sensitive element, has the characteristics of no electromagnetic interference, safe and reliable essence, high precision, no drift, large capacity and easy expansion, realizes the state monitoring of a roof and surrounding rocks by a mine pressure monitoring system for a mine tunnel, and has the following characteristics:

1. the real-time online monitoring of the mine pressure and the displacement can be realized;

2. the device is uncharged and intrinsically safe, and can be used for goaf monitoring to eliminate the traditional monitoring blind area; the method can also be used for underground emergency communication and disaster real-time monitoring;

3. the device is free from the interference of electromagnetic fields, and has high monitoring precision, long transmission distance (more than 10 kilometers) and high reliability;

4. the system can realize early warning on the roof disaster, record state signals in real time, draw curves and provide data support for pre-judging and forecasting of the disaster;

5. one optical fiber can realize multi-point and multi-parameter measurement; one device can monitor a plurality of optical fibers, cover more than 10 kilometers, and has large system capacity and strong system expansibility.

Drawings

The utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic view of a mounting structure of a roof separation sensor;

FIG. 2 is a schematic view of the installation structure of the optical fiber anchor rod stress sensor;

FIG. 3 is a schematic view of the mounting structure of the optical fiber drilling stress sensor;

FIG. 4 is a schematic structural diagram of a mine pressure monitoring system according to the present invention;

in the figure: 1-a roof separation sensor; 2-optical fiber anchor rod stress sensor; 3-optical fiber drilling stress sensor; 4-optical fiber roadway convergence displacement sensor; 5-a top plate; 6-steel wire rope; 7, anchoring the bolt; 8, a tray; 9-a nut; 10-oil pressure package; 11-oil guide pipe; 12-a sensor; 13-a rock formation; 14-an optical cable; 15-air intake lane; 16-return airway; 17-stoping face; and 18, monitoring the substation.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.

As shown in fig. 1 to 4, the present embodiment provides a mine pressure monitoring system for a mine roadway, which includes a fiber grating-based roof separation sensor 1, a fiber anchor rod stress sensor 2, a fiber drilling stress sensor 3, and a fiber roadway convergence displacement sensor 4; a first mounting hole is formed in the position of a monitoring point of a tunneling working surface in the rock stratum, a steel wire rope 6 is arranged in the first mounting hole, one end of the steel wire rope 6 is anchored in the rock stratum, the other end of the steel wire rope penetrates through the top plate 5 to be connected with the top plate separation layer sensor 1 based on the fiber bragg grating, and the top plate separation layer sensor 1 based on the fiber bragg grating is fixed on the top plate 5; the optical fiber anchor rod stress sensor 2 is fixed in a rock stratum through an anchor rod 7, one end of the anchor rod 7 is anchored in the rock stratum, the other end of the anchor rod 7 penetrates through the top plate 5, a tray 8 is arranged at the end part of the anchor rod, a through hole is formed in the optical fiber anchor rod stress sensor 2, a section of the anchor rod 7, which is located below the tray 8, is arranged in the through hole of the optical fiber anchor rod stress sensor 2, and the optical fiber anchor rod stress sensor 2 is fixed below the tray 8 through a nut 9; the monitoring point position of drilling stress is equipped with the third mounting hole in the stratum, and the third mounting hole sets up for the level, and optical fiber drilling stress sensor 3 includes sensor 12, leads oil pipe 11 and oil pressure package 10, sets gradually oil pressure package 10, leads oil pipe 11 and sensor 12 by inside to outside in the third mounting hole, and optical fiber tunnel convergence displacement sensor 4 passes through the installing support to be fixed on roof 5.

Furthermore, the first mounting holes are arranged every 50 meters on the underground recovery and tunneling working face, and the depth of the first mounting holes is 2-6 meters.

Further, the diameter of the anchor 7 is 25 mm.

Furthermore, the diameter of the third mounting hole is 42 mm-46 mm.

Further, roof absciss layer sensor 1, optic fibre stock stress sensor 2, optic fibre drilling stress sensor 3, optic fibre tunnel convergence displacement sensor 4 based on fiber grating all are connected with the fiber grating demodulation appearance through optical cable 14, and the fiber grating demodulation appearance is connected with the controller, and the controller is connected with LCD, including fiber grating demodulation appearance, controller and LCD in the control substation.

Further, the model of the top plate delamination sensor 1 based on the fiber grating is KGL 10; the model of the optical fiber anchor rod stress sensor 2 is KGM 300; the model of the optical fiber drilling stress sensor 3 is KGZ 30; the model of the optical fiber roadway convergence displacement sensor 4 is KGW 50; the fiber grating demodulator is model number YGSJ 12.

As shown in fig. 4, a roof separation sensor 1, an optical fiber anchor rod stress sensor 2, an optical fiber drilling stress sensor 3 and an optical fiber roadway convergence displacement sensor 4 based on an optical fiber grating in the mine pressure monitoring system are arranged in an air inlet roadway 15 and an air return roadway 16 of a mine, the roof separation sensor 1 based on the optical fiber grating is mainly used for detecting separation information of a roof 5, when the roof 5 is displaced, the wavelength of the grating in the sensor is changed, and the displacement of the roof can be obtained by demodulating and analyzing the change situation of the grating wavelength; the optical fiber anchor rod stress sensor 2 is mainly used for monitoring the stress of a coal mine tunnel top plate 5 and anchor rods or anchor cables on two sides; the optical fiber drilling stress sensor 3 is mainly used for the stress action of an underground coal seam or a rock stratum of a coal mine, such as the support stress of the coal seam ahead of a working face, the support stress of a reserved coal pillar and the like, the drilling stress monitoring is used for measuring the change of a stress field in the coal seam or the rock stratum caused by mining influence, is one of important means for researching the dynamic pressure action rule of a mining field, and can be used for the initial prediction and trend analysis of the rock burst of the mining field; the optical fiber roadway convergence displacement sensor 4 is mainly used for monitoring the displacement of the top and bottom plates and monitoring the extrusion convergence of two sides of the roadway. When the monitoring substation works, the optical fiber sensing modulation and demodulation instrument in the monitoring host sends continuous broadband light which is transmitted to each optical fiber sensor through the transmission optical cable, the sensors reflect narrow-band light related to physical quantity information back to the optical fiber grating modulation and demodulation instrument, the variation of reflection wavelength is demodulated, and then the sensor information of a point to be measured is obtained.

While the utility model has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A mine pressure monitoring system for a mine roadway is characterized by comprising a top plate separation layer sensor based on an optical fiber grating, an optical fiber anchor rod stress sensor, an optical fiber drilling hole stress sensor and an optical fiber roadway convergence displacement sensor; a first mounting hole is formed in the position of a monitoring point of a tunneling working surface in a rock stratum, a steel wire rope is arranged in the first mounting hole, one end of the steel wire rope is anchored in the rock stratum, the other end of the steel wire rope penetrates through a top plate and is connected with the top plate separation layer sensor based on the fiber bragg grating, and the top plate separation layer sensor based on the fiber bragg grating is fixed on the top plate; the optical fiber anchor rod stress sensor is fixed in a rock stratum through an anchor rod, one end of the anchor rod is anchored in the rock stratum, the other end of the anchor rod penetrates through a top plate, a tray is arranged at the end part of the anchor rod, a through hole is formed in the optical fiber anchor rod stress sensor, a section of the anchor rod, which is located below the tray, is arranged in the through hole, and the optical fiber anchor rod stress sensor is fixed below the tray through a nut; the monitoring point position of drilling stress is equipped with the third mounting hole in the stratum, the third mounting hole sets up for the level, optical fiber drilling stress sensor includes the sensor, leads oil pipe and oil pressure package, set gradually the oil pressure package in the third mounting hole from inside to outside, lead oil pipe and sensor, optical fiber tunnel convergence displacement sensor passes through the installing support to be fixed on the roof.

2. The mine pressure monitoring system for mine roadways according to claim 1, wherein the first mounting holes are arranged every 50 meters on a down-hole stoping and tunneling working surface, and the depth of the first mounting holes is 2-6 meters.

3. The mine pressure monitoring system for mine roadways according to claim 1, wherein the diameter of the anchor rod is 25 mm.

4. The mine pressure monitoring system for mine roadways according to claim 1, wherein the diameter of the third mounting hole is 42 mm-46 mm.

5. The mine pressure monitoring system for mine tunnels according to claim 1, wherein the fiber grating-based roof separation sensor, the fiber anchor rod stress sensor, the fiber drilling stress sensor and the fiber tunnel convergence displacement sensor are all connected with a fiber grating demodulator through optical cables, the fiber grating demodulator is connected with a controller, and the controller is connected with a liquid crystal display.

6. The mine pressure monitoring system for mine roadways according to claim 5, wherein the model number of the fiber grating-based roof separation sensor is KGL 10; the model of the optical fiber anchor rod stress sensor is KGM 300; the model of the optical fiber drilling stress sensor is KGZ 30; the type of the optical fiber roadway convergence displacement sensor is KGW 50; the model of the fiber grating demodulator is YGSJ 12.