CN111577360B - Use method of recoverable acquisition instrument for real-time observation of stress characteristic and vibration characteristic of stope surrounding rock - Google Patents

Use method of recoverable acquisition instrument for real-time observation of stress characteristic and vibration characteristic of stope surrounding rock Download PDF

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Publication number
CN111577360B
CN111577360B CN202010535082.5A CN202010535082A CN111577360B CN 111577360 B CN111577360 B CN 111577360B CN 202010535082 A CN202010535082 A CN 202010535082A CN 111577360 B CN111577360 B CN 111577360B
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stress
connecting rod
vibration
sensor
data
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CN111577360A (en
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赵国彦
马举
王玺
毛文杰
简筝
王剑波
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Shandong Gold Mining Technology Co ltd Deep Mine Mining Laboratory Branch
Central South University
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Shandong Gold Mining Technology Co ltd Deep Mine Mining Laboratory Branch
Central South University
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/02Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection having means for indicating tension
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/18Special adaptations of signalling or alarm devices
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • GPHYSICS
    • G08SIGNALLING
    • G08CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

The invention relates to a recoverable acquisition instrument for observing stress characteristics and vibration characteristics of surrounding rocks of a stope in real time, which adopts the technical scheme that: the vibration sensor is arranged in a groove of the stress sensor, the coaxial lead is connected and fixed, then the coaxial lead is sleeved with the protective sleeve, the stop ring is arranged, the upper end of the stress sensor is connected with a head connecting rod provided with an expansion shell anchor head through left-hand threads, the lower end of the stress sensor is connected with a tail connecting rod through left-hand threads, glue is fastened at the joint, a wireless data acquisition module arranged in the tail connecting rod and a data integration device arranged outside a drill hole are used for wireless transmission of stress and vibration data, and real-time monitoring and early warning are carried out on stope surrounding rocks based on monitoring data. The invention has low cost, can be recycled and reused, simultaneously monitors rock stress and vibration data, realizes the real-time remote data acquisition, transmission and integration, and improves the safety and the high efficiency of mining.

Description

Use method of recoverable acquisition instrument for real-time observation of stress characteristic and vibration characteristic of stope surrounding rock
Technical Field
The invention belongs to the field of mine safety monitoring, and particularly relates to a recoverable acquisition instrument for observing stress characteristics and vibration characteristics of surrounding rocks of a stope in real time and a using method thereof.
Background
During the underground mining of metal ores, the dynamic phenomenon of sudden and violent destruction due to the instantaneous release of the elastic deformation properties of the mine rock mass is called "ground pressure". The occurrence of ground pressure often causes disastrous casualties and huge economic losses, and becomes one of the main factors causing major disasters of mines. Although various methods are adopted for safety monitoring and safety precaution of a stope in domestic and foreign mines for a long time, the methods comprise micro-seismic monitoring, acoustic emission observation, ground stress observation, displacement observation and the like, the comprehensive stress condition of a stope roof and surrounding rocks is very slightly known due to the limitations of the monitoring methods, the monitoring cost, the damage influence of stope detonation waves and the like, the stability and the damage condition of a rock stratum are difficult to know, and the safety of the stope cannot be effectively managed and accurately controlled, so that serious production safety accidents are caused.
In the deep mining working process, the current monitoring means cannot generate effective monitoring results and accurate evaluation on a stope roof and surrounding rocks due to complex surrounding rock mechanical conditions, and an excessive supporting mode can be formed under the condition, so that the supporting cost is increased. Patent No. 01272808.X discloses a coal rock dynamic disaster electromagnetic radiation monitoring device, 201110109285.9 discloses a method for nondestructive real-time magnetic monitoring and forecasting deep surrounding rock burst, but the monitoring result error is larger due to the interference of groundwater and electromagnetic radiation; patent No. 201910083121.X discloses a mining monitoring early warning anchor rod, and patent No. 201710452402.9 discloses a surrounding rock disaster early warning method and an anchoring early warning device for an anchor rod supporting roadway, which are all unrecoverable and easily cause resource waste; patent No. 201310147960.6 discloses an intelligence stock early warning monitoring system of tunnel country rock calamity, but monitoring data is single, and the early warning effect is not accurate enough. Therefore, the ground pressure monitoring equipment which can monitor and analyze various data reflecting the stability of the surrounding rock in real time and early warn the surrounding rock in a stope in real time and can be recycled and has low cost is researched, and the ground pressure monitoring equipment has important practical significance for improving the safety and the efficiency of mining.
Disclosure of Invention
The invention provides a recyclable acquisition instrument for observing the stress characteristic and the vibration characteristic of surrounding rocks of a stope in real time, and aims to overcome the defects that the conventional equipment cannot comprehensively acquire multiple items of data, is low in support rationalization degree, is poor in real-time performance and the like.
In order to realize the purpose, the invention adopts the technical scheme that:
a recoverable acquisition instrument for observing the stress characteristic and the vibration characteristic of surrounding rocks in a stope in real time is characterized by comprising an expansion shell anchor head, a head connecting rod, a stop ring, a stress sensor, a vibration sensor, a protective sleeve, a wireless data acquisition module, a tail connecting rod, a tray and a nut, wherein the upper end of the stress sensor is connected with the head connecting rod through left-hand threads, the expansion shell anchor head is installed at the top end of the head connecting rod, the lower end of the stress sensor is connected with the tail connecting rod through the left-hand threads, glue is fastened at the joint, the tray and the nut are installed at the lower end of the tail connecting rod, the middle part of the stress sensor is in a hollow cylinder shape, steps protruding outwards are arranged at the bottom of the hollow cylinder shape, a groove is arranged at the upper part of the hollow cylinder shape, the vibration sensor is installed in the groove, the lower end of the tail connecting rod is abutted to the step, a stop ring is arranged at the upper end of the protective sleeve, and a wireless data acquisition module is arranged in the tail connecting rod.
Furthermore, the heat shrink tube wraps the head connecting rod and the tail connecting rod so as to reduce corrosion of the anchor rod caused by the environment.
Furthermore, a left-handed thread at the lower end of the stress sensor is provided with a hole, and wires of the vibration sensor and the stress sensor are led out of the hole and connected to the wireless data acquisition module.
Furthermore, a data integration device is arranged outside the stope, the wireless data acquisition module receives data signals sent by the vibration sensor and the stress sensor and transmits the data signals to the data integration device, the data integration device integrates and arranges the data according to set time intervals and standards to complete continuous acquisition and integration of the data, and finally the data are sent to a computer terminal on the earth surface through the underground optical cable for analysis.
Further, when the head connecting rod fixed in the rock stratum drilling hole is subjected to the action of tensile stress generated by rock stratum deformation, the stress sensor generates vibrating wire signals with corresponding frequencies by sensing the stress, and under the condition of electrification, the vibrating wire signals are output in the form of electric signals with the same frequency.
Furthermore, the vibration sensor records the vibration generated by rock stratum fracture, and monitoring data are output through corresponding current signals, so that the rock stratum energy change and rock stratum damage conditions at any time are obtained, and the rock stratum safety is estimated and evaluated.
Further, the protective sleeve is made of steel materials, and the joint of the two ends of the protective sleeve is subjected to glue sealing treatment.
The use method of the recoverable acquisition instrument for observing the stress characteristic and the vibration characteristic of the surrounding rock of the stope in real time is applied to the recoverable acquisition instrument, and is characterized by comprising the following steps of:
the method comprises the steps of firstly, selecting proper stopes and roadway locations to arrange monitoring equipment according to actual conditions and requirements of mines, and meanwhile determining the quantity and the number of the arranged monitoring equipment.
Assembling the acquisition instrument, and connecting the shell expansion anchor head with the head connecting rod; after the stress sensor and the vibration sensor are calibrated, the vibration sensor is placed in a groove in the middle of the stress sensor, a coaxial lead is connected and fixed, then a protective sleeve is sleeved, and a stop ring is installed and then connected with a head connecting rod; the lower end of the stress sensor is connected with the tail connecting rod, and in order to ensure that the device can be reliably recovered, the joint is subjected to gluing and fixing treatment.
Step three, mounting the acquisition instrument, namely drilling a hole, integrally mounting the acquisition instrument assembled in the step two into the hole, and then holding the tail connecting rod by hand to rotate left to enable the expansion shell anchor head to expand and tightly fit with the rock to form end anchoring force; after the end part forms enough anchoring force, the lower end of the tail connecting rod is provided with the tray and the nut, so that the tray on the tail connecting rod is attached to the surrounding rock, the nut is screwed, the stress sensor and the vibration sensor are connected with the data integration device through the wireless data acquisition module, the monitoring equipment is debugged on site, and initial monitoring data is recorded.
And step four, connecting the data integration device with the underground communication network, and testing the data receiving condition of the earth surface terminal.
Step five, after the installation and debugging work is finished, starting the continuous monitoring work for a long time; when the surrounding rock deforms, the stress sensor and the vibration sensor collect ground pressure information in the top plate and transmit the ground pressure information to the earth surface terminal through the wired network, and the earth surface computer terminal evaluates the safety of the top plate of the stope according to the monitored stress and vibration data.
Advantageous effects
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following positive effects:
(1) the invention integrates two effective data monitoring means of stress and vibration data, overcomes the defect that the traditional ground pressure monitoring can only depend on single data, provides theory and data support for reasonable mine support work, improves safety and avoids excessive support and lagging support.
(2) The invention can be reconstructed according to the existing supporting equipment of the mine, greatly reduces the monitoring cost, can realize large-scale continuous monitoring of the stope by relying on the underground communication network, and improves the flexibility and the reliability of ground pressure monitoring.
(3) The invention realizes the automation and the persistence of data acquisition, transmission and integration, ensures that the monitoring work does not depend on-site manual acquisition any more, can easily realize the roof surrounding rock monitoring work on the ground surface as long as a perfect subsequent communication network is provided, saves the manpower and material resources of the mine, and is beneficial to improving the safety and the efficiency of the monitoring work.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a diagram of a stress sensor of the present invention;
FIG. 3 is a schematic diagram of data acquisition according to the present invention.
Wherein: 1-expanding a shell anchor head; 2-a head link; 3-a stop ring; 4-a stress sensor; 4.1-step; 4.2-grooves; 5-a vibration sensor; 6-a protective sleeve; 7-a wireless data acquisition module; 8-tail link; 9-a tray; 10-a nut; 11-data integration means.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Example one
A recoverable acquisition instrument for observing the stress characteristic and the vibration characteristic of surrounding rocks of a stope in real time comprises an expansion shell anchor head 1, a head connecting rod 2, a stop ring 3, a stress sensor 4, a vibration sensor 5, a protective sleeve 6, a wireless data acquisition module 7, a tail connecting rod 8, a tray 9 and a nut 10, wherein the upper end of the stress sensor 4 is connected with the head connecting rod 2 through left-handed threads, the expansion shell anchor head 1 is installed at the top end of the head connecting rod 2, the lower end of the stress sensor 4 is connected with the tail connecting rod 8 through the left-handed threads, the joint is fastened by glue, the tray 9 and the nut 10 are installed at the lower end of the tail connecting rod 8, the middle part of the stress sensor is in a hollow cylinder shape, the bottom of the hollow cylinder shape is provided with an outwardly protruding step 4.1, the upper part of the hollow cylinder shape is provided with a groove 4.2, the vibration sensor 5 is installed in the, the middle part of the stress sensor is sleeved with the protective sleeve 6, the lower end of the protective sleeve abuts against the step 4.1, the upper end of the protective sleeve 6 is provided with the stop ring 3, and the tail connecting rod 8 is internally provided with the wireless data acquisition module 7.
Further, the outer parts of the head connecting rod 2 and the tail connecting rod 8 are all provided with heat shrink tube packages so as to reduce corrosion of the anchor rod caused by the environment.
Furthermore, a left-handed thread at the lower end of the stress sensor 4 is provided with a hole, and the wires of the vibration sensor 5 and the stress sensor 4 are led out from the hole and connected to the wireless data acquisition module 7.
Further, a data integration device 11 is arranged outside the stope, the wireless data acquisition module 7 receives data signals sent by the vibration sensor 5 and the stress sensor 4 and transmits the data signals to the data integration device 11, the data integration device 11 integrates and arranges the data according to set time intervals and standards to complete continuous acquisition and integration of the data, and finally the data are sent to a computer terminal on the ground surface through the underground optical cable for analysis.
Further, when the head connecting rod 2 fixed in a rock stratum borehole is subjected to rock stratum deformation to generate tensile stress, the stress sensor 4 generates vibrating wire signals with corresponding frequencies by sensing the stress, and in the case of electrification, the vibrating wire signals are output in the form of electric signals with the same frequency.
Further, the vibration sensor 5 records the vibration generated by rock stratum fracture, and monitoring data are output through corresponding current signals, so that the rock stratum energy change and rock stratum damage conditions at any time are obtained, and the rock stratum safety is estimated and evaluated.
Further, the protection sleeve 6 is made of steel materials, and the joint of the two ends is subjected to glue sealing treatment. The method specifically comprises the following steps: the lower end of the protective sleeve 6 abuts against the step 4.1 of the stress sensor 4 and is glued with the stress sensor 4, the protective sleeve 6 is sleeved on the stress sensor 4, the stop ring 3 is installed at the upper end to abut against the protective sleeve 6, the head connecting rod 2 is screwed, the glue at one end is sealed by the glue among the protective sleeve 6, the stop ring 3 and the stress sensor 4, and the effect of preventing water, corrosion and impact on the stress sensor is achieved.
The working principle of the invention is as follows: after the installation of the collecting instrument is completed, the data transmission function is debugged and the power supply is turned on for continuous monitoring, when the surrounding rock of the stope deforms under stress, the stress and the vibration signal can be monitored by the vibration sensor 5 and the stress sensor 4 on the collecting instrument and converted into corresponding electric signals, the electric signals carrying data are integrated in the data integration device 11 through the wireless data acquisition module 7, and then are transmitted to a surface computer through an underground optical cable for arrangement and analysis, and real-time monitoring and early warning are carried out on the surrounding rock of the stope based on monitoring data.
The dimensions and functions of the various components in this embodiment are described in detail below:
the maximum diameter of the anchor head 1 before and 45mm after shell expansion is 39mm, so that the diameter of a drill hole which is beneficial to exerting the maximum anchoring force is about 42mm, and the length is 15 mm; the material is steel; when the left-handed propelling of the head connecting rod 2 is carried out, the clamps on the two sides move upwards and are tightly attached to the rock to form anchoring force.
The head connecting rod 2 is used for connecting the stress sensor 4 and the vibration sensor 5, so that the acquisition instrument is anchored and installed in a roof rock stratum of a stope through the expansion shell anchor head 1, and the outside of the acquisition instrument is wrapped by the heat-shrinkable tube, thereby reducing the corrosion of the environment on the anchor rod.
In the embodiment, the length of the head connecting rod 2 is 700mm, the nominal diameter is 25mm, the ultimate tensile strength is 180kN, the head connecting rod is a left-handed thread, the tooth height is 1.5mm, the thread pitch is 12.7mm, the upper end of the head connecting rod is connected with the shell expansion anchor rod 1, and the lower end of the head connecting rod is connected with the stress sensor 4; the existing support anchor rod can be reformed and produced according to the actual conditions of the mine, and the cost of ground pressure monitoring work is greatly reduced.
The thickness of the stop ring 3 is 5mm, the inner diameter is 20mm, the outer diameter is 36mm, after the protective sleeve 6 is sleeved on the stress sensor 4, the stop ring is installed on the stress sensor 4 and the protective sleeve 6, the head connecting rod 2 is installed at the upper end of the stress sensor 4, on one hand, the stop ring 3 is convenient for installing the vibration sensor 5, and on the other hand, the head connecting rod 2 and the stress sensor 4 are reliably connected;
stress sensor 4 is formed by design customization processing, and length 175mm, upper end and lower extreme set up left-hand thread respectively, and wherein lower extreme left-hand thread trompil, the stress sensor middle part are the cavity tube-shape, cavity tube-shape bottom is provided with outside outstanding step 4.1, and step department diameter is 36mm, cavity tube-shape upper portion sets up recess 4.2 for installation vibration sensor 5, and stress sensor 4's wire and vibration sensor 5's coaxial conductor all draw forth in the trompil of lower extreme left-hand thread, are connected with wireless data acquisition module 7 in the afterbody connecting rod 8, stress sensor 4 adopts vibrating wire theoretical design, can survey maximum stress 260MPa, have high sensitivity and high accuracy, full digital signal detection, advantages such as long distance transmission undistorted.
The vibration sensor 5 is made of stainless steel and used for impact measurement, is of a uniaxial piezoelectric acceleration type, can record vibration generated by rock stratum fracture, and outputs monitoring data through corresponding current signals, so that the energy change of the rock stratum and the damage condition of the rock stratum at any time are obtained, and the safety of the rock stratum is estimated and evaluated.
The protection sleeve 6 is made of stainless steel, is high in hardness, has the length of 175mm, the outer diameter of 36mm, the inner diameter of 32mm and the wall thickness of 2mm, the lower end of the protection sleeve abuts against the step 4.1 of the stress sensor, the upper end of the protection sleeve is provided with the stop ring 3, and the head connecting rod 2 is used for fastening threads, so that the stress sensor 4 and the vibration sensor 5 are protected.
8 mm, nominal diameter 25mm, ultimate tensile strength 180kN of afterbody connecting rod are left-handed screw, and the tooth height is 1.5mm, and pitch 12.7mm is whole through the left-handed threaded connection with stress sensor 4 to draw the stock outside the hole, and self parcel has the pyrocondensation pipe to carry out anticorrosive waterproof simultaneously, and the department of drilling hole is located and the country rock anchor to the deuterogamy tray 9 and nut 10, makes the whole tensile stress effect that receives of monitoring facilities in the stratum.
Example two
Fig. 3 is a schematic diagram of the method of the present invention. The using method of the recoverable collecting instrument for observing the stress characteristic and the vibration characteristic of the surrounding rock of the stope in real time comprises the following steps:
the method comprises the steps of firstly, selecting proper stopes and roadway locations to arrange monitoring equipment according to actual conditions and requirements of mines, and meanwhile determining the quantity and the number of the arranged monitoring equipment.
Assembling the acquisition instrument, and connecting the shell expansion anchor head 1 with the head connecting rod 2; after the stress sensor 4 and the vibration sensor 5 are calibrated, the vibration sensor 5 is placed in a groove 4.2 in the middle of the stress sensor 4, and after the coaxial lead is connected and fixed, a protective sleeve 6 is sleeved on the groove, and after a stop ring 3 is installed, the groove is connected with the head connecting rod 2; the lower end of the stress sensor 4 is connected with the tail connecting rod 8, and in order to ensure that the device can be reliably recovered, the joint is glued and fixed.
Step three, mounting the acquisition instrument, namely drilling a hole, integrally mounting the acquisition instrument assembled in the step two into the hole, and then holding the tail connecting rod 8 by hand to rotate left to enable the expansion shell anchor head 1 to expand and tightly fit with the rock to form end anchoring force; after the end part forms enough anchoring force, the lower end of the tail connecting rod 8 is provided with the tray 9 and the nut 10, so that the tray 9 on the tail connecting rod is attached to the surrounding rock, the nut 10 is screwed, the stress sensor 4 and the vibration sensor 5 are connected with the data integration device 11 through the wireless data acquisition module 7, the monitoring equipment is debugged on site, and initial monitoring data is recorded.
And step four, connecting the data integration device 11 with the underground communication network, and testing the data receiving condition of the earth surface terminal.
Step five, after the installation and debugging work is finished, starting the continuous monitoring work for a long time; when the surrounding rock deforms, the stress sensor 4 and the vibration sensor 5 collect earth pressure information in the roof and transmit the earth pressure information to the earth surface terminal through a wired network, and the earth surface computer terminal evaluates the safety of the roof of the stope according to the monitored stress and vibration data.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (7)

1. A method for using a recoverable acquisition instrument for observing stress characteristics and vibration characteristics of surrounding rocks of a stope in real time comprises a shell expansion anchor head (1), a head connecting rod (2), a stop ring (3), a stress sensor (4), a vibration sensor (5), a protective sleeve (6), a wireless data acquisition module (7), a tail connecting rod (8), a tray (9) and a nut (10), wherein the upper end of the stress sensor (4) is connected with the head connecting rod (2) through left-handed threads, the shell expansion anchor head (1) is installed at the top end of the head connecting rod (2), the lower end of the stress sensor (4) is connected with the tail connecting rod (8) through the left-handed threads, the joint is fastened with glue, the tray (9) and the nut (10) are installed at the lower end of the tail connecting rod (8), the middle part of the stress sensor is in a hollow cylindrical shape, the utility model discloses a vibration sensor, including cavity tube-shape bottom, stress sensor, protective sleeve (6), protection sleeve (8), the cavity tube-shape bottom is provided with outside outstanding step (4.1), cavity tube-shape upper portion sets up recess (4.2), install vibration sensor (5) in recess (4.2), stress sensor middle part is located to protective sleeve (6) cover, the lower extreme butt in on step (4.1) protective sleeve (6) upper end installation locking ring (3), built-in wireless data acquisition module (7) of afterbody connecting rod (8), its characterized in that, the method of use includes following step:
firstly, selecting proper stopes and roadway locations to arrange monitoring equipment according to the actual conditions and requirements of the mine, and simultaneously determining the quantity of the arranged monitoring equipment;
assembling the acquisition instrument, and connecting the shell expansion anchor head (1) with the head connecting rod (2); after the stress sensor (4) and the vibration sensor (5) are calibrated, the vibration sensor (5) is placed in a groove in the middle of the stress sensor (4), a coaxial lead is connected and fixed, then a protective sleeve (6) is sleeved on the stress sensor, and a stop ring (3) is installed and then connected with the head connecting rod (2); the lower end of the stress sensor (4) is connected with a tail connecting rod (8), and in order to ensure that the device can be reliably recovered, gluing and solidifying are carried out on the connecting part;
step three, mounting the acquisition instrument, namely drilling a hole, integrally mounting the acquisition instrument assembled in the step two into the hole, and then holding the tail connecting rod (8) to rotate left to enable the expansion shell anchor head (1) to expand to be tightly attached to the rock to form end anchoring force; after a sufficiently large anchoring force is formed at the end part, a tray (9) and a nut (10) are installed at the lower end of a tail connecting rod (8), the nut (10) is screwed down after the tray (9) on the tail connecting rod is attached to surrounding rocks, a stress sensor (4) and a vibration sensor (5) are connected with a data integration device (11) through a wireless data acquisition module (7), field debugging is carried out on monitoring equipment, and initial monitoring data are recorded;
connecting the data integration device (11) with the underground communication network, and testing the data receiving condition of the earth surface terminal;
step five, after the installation and debugging work is finished, starting the continuous monitoring work for a long time; when the surrounding rock deforms, the stress sensor (4) and the vibration sensor (5) collect ground pressure information in the roof and transmit the ground pressure information to the earth surface terminal through a wired network, and the earth surface computer terminal evaluates the safety of the roof of the stope according to the monitored stress and vibration data.
2. The use method of the recoverable collecting instrument for the real-time observation of the stress characteristic and the vibration characteristic of the stope surrounding rock according to claim 1, wherein the heat-shrinkable tubes are arranged outside the head connecting rod and the tail connecting rod to wrap the head connecting rod and the tail connecting rod so as to reduce the corrosion of the anchor rod caused by the environment.
3. The use method of the recoverable collecting instrument for real-time observation of the stress characteristic and the vibration characteristic of the stope surrounding rock according to claim 1, characterized in that a left-handed thread at the lower end of the stress sensor (4) is provided with a hole, and the wires of the vibration sensor (5) and the stress sensor (4) are led out from the hole and connected to the wireless data collecting module (7).
4. The use method of the recoverable collecting instrument for real-time observation of the stress characteristic and the vibration characteristic of the surrounding rock of the stope according to the claim 1 is characterized in that a data integration device (11) is arranged outside the stope, the wireless data collecting module (7) receives data signals sent by the vibration sensor (5) and the stress sensor (4) and transmits the data signals to the data integration device (11), the data integration device (11) integrates and arranges the data according to the set time interval and standard to complete continuous collection and integration of the data, and finally the data are sent to a computer terminal on the ground surface through a downhole optical cable for analysis.
5. The use method of the recoverable collecting instrument for the real-time observation of the stress characteristic and the vibration characteristic of the stope surrounding rock is characterized in that when a head connecting rod (2) fixed in a rock stratum drilling hole is subjected to tensile stress generated by rock stratum deformation, the stress sensor (4) generates vibrating wire signals with corresponding frequencies by sensing the stress, and under the condition of electrification, the vibrating wire signals are output in the form of electric signals with the same frequency.
6. The use method of the recoverable collecting instrument for the real-time observation of the stress characteristics and the vibration characteristics of the stope surrounding rock according to claim 1, characterized in that the vibration sensor (5) records the vibration generated by rock stratum fracture, and monitoring data is output by corresponding current signals, so that the energy change of the rock stratum and the damage condition of the rock stratum at any time are obtained, and the safety of the rock stratum is estimated and evaluated.
7. The use method of the recoverable collecting instrument for real-time observation of the stress property and the vibration property of the stope surrounding rock according to claim 1, wherein the protective sleeve (6) is made of steel materials, and the joint of two ends of the protective sleeve is subjected to glue sealing treatment.
CN202010535082.5A 2020-06-12 2020-06-12 Use method of recoverable acquisition instrument for real-time observation of stress characteristic and vibration characteristic of stope surrounding rock Active CN111577360B (en)

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