CN105606278A - Drill hole monitoring probing rod for surrounding rock stress field - Google Patents
Drill hole monitoring probing rod for surrounding rock stress field Download PDFInfo
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- CN105606278A CN105606278A CN201610140087.1A CN201610140087A CN105606278A CN 105606278 A CN105606278 A CN 105606278A CN 201610140087 A CN201610140087 A CN 201610140087A CN 105606278 A CN105606278 A CN 105606278A
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- rod
- surrounding rock
- rigid rod
- monitoring
- sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/26—Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
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- General Physics & Mathematics (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention provides a drill hole monitoring probing rod for a surrounding rock stress field, and belongs to the technical field of tunnel surrounding rock stress distribution monitoring. The monitoring probing robe includes a rigid rod, a flexible rod, a sensor, water-proof membranes, a wire, and a data acquisition instrument, wherein the rigid rod and the flexible rod are alternatively connected; cavities are formed in the internal of the rigid rod body and the flexible rod body; the sensor is connected with wire; the sensor is arranged on the rigid rod; the water-proof membranes are arranged at the outside of the whole rod bodies; and the wire leads to the tail end of the rod bodies through the cavities in the rod bodies so as to connect with the data acquisition instrument. The drill hole monitoring probing rod for a surrounding rock stress field has the advantages of being economical in design and simple in structure, comprehensively reflecting the dynamic stress change at each position of a surrounding rock monitoring zone, and accurately delineating a surrounding rock relaxation zone. Besides, as the flexible zone of the monitoring probing rod can be stretched and deformed a certain range, the drill hole monitoring probing rod for a surrounding rock stress field can greatly reduce the risk for damaging the monitoring device because of deformation of surrounding rocks, and can reduce the error for stress measurement.
Description
Technical field
The present invention relates to roadway surrounding rock stress distribution monitoring technical field, refer to especially a kind of country rockStress field boring monitoring feeler lever.
Background technology
Along with a large amount of underground passages and Tunnel Engineering construction, especially tunnel of working environment securityThe requirement of surrounding rock stability improves constantly. Along with Underground Engineering Excavation or mining activity continue intoOK, surrouding rock stress can redistribute and produce Unloading Deformation. That constructs according to New Austrian Tunneling Method is substantially former, in work progress, needing to carry out a large amount of also statistics that measure directly perceived, reliable accurately commentsThe stable state of valency country rock, or judge its dynamic development trend, evaluate the security of project under constructionCave in prevention country rock, avoid security incident to occur.
State of surrounding rock monitoring generally comprises STRESS VARIATION monitoring and change in displacement monitoring. Tradition country rockMonitoring adopts spirit level or Other Instruments periodic measurement vault to sink or the monitoring of steel ruler convergence instrumentCountry rock convergence etc., but there is in actual applications certain defect in this type of displacement monitoring, at country rockIn deformation process, rock mass macroscopic deformation changes and has obvious time lag compared to its internal stressProperty, therefore displacement monitoring can not reflect surrounding rock stability situation of change in time, to Potential hazardsPre-alerting ability comparatively limited. Therefore, stress monitoring method has well in practical engineering applicationDevelopment prospect.
The monitoring of country rock internal stress comprises bolt shaft power and the monitoring of boring oil pressure sensor, bolt shaftPower only reflects the suffered pulling force of anchor pole, can not reflect surrouding rock stress and change procedure thereof, and applicationMany boring oil pressure sensors can be monitored the change procedure of surrouding rock stress, but have 2 mainlyShortcoming, the one, because a sensor can only be installed in single hole, cannot reflect in monitoring holes differentThe stress dynamic changing process of position, and easily damaged and affect follow-up work in country rock large deformation,The 2nd, the stress recording is the mean value of three-dimensional stress, cannot measure answering on different directions simultaneouslyPower value.
For avoiding the deficiency of routine monitoring device, and can adapt to the underground space under certain condition and encloseComplex environment in rock, and the dynamic change situation of Real-Time Monitoring surrouding rock stress, be necessary research and developmentA kind of novel stress field of the surrounding rock monitoring device.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of stress field of the surrounding rock boring monitoring feeler lever,To overcome the deficiency in conventional country rock monitoring, reflect that in time the dynamic stress of country rock diverse location becomesChange, ensure construction safety.
This monitoring feeler lever comprises rigid rod, flexible link, sensor, waterproof membrane, wire and dataAcquisition Instrument, rigid rod is alternately connected with flexible link, and rigid rod and flexible link inner hollow formBody of rod internal cavities, wire is connected with data collecting instrument through body of rod internal cavities, sensor peaceBe contained in rigid rod outside, and sensor contacts with rigid rod outer surface plane, waterproof membrane coversRigid rod and flexible link outside, and fully contact with sensor.
Wherein, rigid rod is threaded connection with flexible link or nested connection, is ensureing that it should haveWorking strength and the prerequisite of integraty under, can require to select suitable connection according to Practical ProjectMode, the length of single rigid rod is less than the length of single flexible bar. Installation of sensors is in rigidityRod outer surface and be plane contact, all lays two group four-way sensors, four directions on each rigid rodBe followed successively by 0,90,180 and 270 degree to corresponding polar angle, conllinear direction is one group,On rigid rod, each group center sensor line and rigid rod body of rod center line are orthogonal. Flexible link materialFor rubber, plastic cement or other possess elastoplasticity material. When use, at inner (the feeler lever end of boringHead) adopt flexible link, in case impaired in locking apparatus installation process.
Alarm Assessment method of the present invention is as follows:
Early warning standard is true according to Practical Project parameters such as lithology, crustal stress state, excavation and supportingsFixed, according to actual country rock situation, the different depth of installing using feeler lever sensor is as independent variable,Corresponding measured stress value, as dependent variable, is determined safety line, early warning critical line, danger early warningLine, and evaluation criterion using this as surrouding rock stress state, to surrounding rock stability evaluate withEarly warning.
Because each mechanics of concrete monitoring rock mass is different with engineering parameter, do not do detailed number at thisAccording to circumscription, design parameter is determined with Practical Project.
The beneficial effect of technique scheme of the present invention is as follows:
In such scheme, can utilize the deformation of the continuous suitable for surrounding rock of flexible link to keep monitoring rodSelf availability, Real-Time Monitoring stress field of the surrounding rock distribution situation in surrouding rock deformation process simultaneously,Reflection surrounding rock stability situation in time. And design is economical, simple in structure, embody country rock prison comprehensivelyThe dynamic stress of surveying each position, district changes, and accurately draws a circle to approve wall rock loosening band, the flexibility of monitoring feeler leverRegion can be in certain limit telescopic shape change, greatly reduces because surrouding rock deformation causes monitoring device and damagesBad risk, reduces stress measurement error.
Brief description of the drawings
Fig. 1 is stress field of the surrounding rock boring monitoring feeler lever structural representation of the present invention;
Fig. 2 is A-A ' profile of Fig. 1;
Fig. 3 is B-B ' profile of Fig. 1;
Fig. 4 is stress field of the surrounding rock monitoring feeler lever construction process figure;
Fig. 5 is the Alarm Assessment method schematic diagram that adopts this device.
Wherein: 1-rigid rod; 2-flexible link; 3-sensor; 4-waterproof membrane; 5-wire; 6-Data collecting instrument; 7-boring; 8-slip casting calculus body; 9-body of rod internal cavities.
Detailed description of the invention
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, belowBe described in detail in connection with drawings and the specific embodiments.
The invention provides a kind of stress field of the surrounding rock boring monitoring feeler lever.
The important technological parameters of this monitoring device is as follows: according to field engineering needs, before monitoring, needSelected correct position boring on country rock, each hole depth and diameter is identical, and aperture is large compared with feeler lever diameter50～100mm, large 2.5～3 times compared with tunnel radius of hole depths, pitch-row is 10～15m, feeler lever sensingDevice group number with Practical Project require and determine, installation of sensors direction as shown in Figure 2, sensor 3Be arranged on rigid rod 1 outer surface and be plane contact, on each rigid rod 1, laying two group four-waysSensor 3, four directions is followed successively by 0,90,180 and 270 degree to corresponding polar angle, altogetherLine direction is one group, each group in sensor 3 lines of centres and rigid rod 1 body of rod on rigid rod 1Heart line is orthogonal. Flexible link 2 as shown in Figure 3 adopts quality of rubber materials. By the feeler lever assembling byPack in boring according to (Fig. 1) mode, for ensureing that the effective stress between feeler lever and hole wall rock mass passesPass, adopt grouting mode in hole to be coupled.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, this monitoring feeler lever comprises: rigid rod 1,Flexible link 2, sensor 3, waterproof membrane 4, wire 5, data collecting instrument 6. Rigid rod 1 HeFlexible link 2 inner hollow, form body of rod internal cavities 9, and wire 5 is through body of rod internal cavities9 are connected with data collecting instrument 6, and sensor 3 is arranged on rigid rod 1 outside, and waterproof membrane 4 isMost external structure, is overlying on whole feeler lever outside or only covers rigid rod. Wherein, rigid rod 1 HeFlexible link 2 is threaded connection, and the length of single rigid rod 1 is less than the length of single flexible bar 2Degree.
Adopt flow process shown in Fig. 4, in practical embodiments, select country rock monitoring surface, and selectedCountry rock monitoring point and monitoring spacing; Carry out directional drilling and stress field of the surrounding rock monitoring feeler lever be installed,Carry out slip casting coupling in hole; The stress state temporal evolution of each boring monitoring point passes through data acquisitionStorage carries out visual output; Determine dynamic stress distribution map in country rock monitoring holes. According to realityCountry rock situation is determined early warning critical line, and using this as Assessment of Surrounding Rock Stability standard, to country rockStability is carried out Evaluation.
Specific construction flow process is as follows:
(1) determine monitoring boring 7 positions;
(2) hole to projected depth;
(3) in hole, assigned position is placed feeler lever;
(4) the interior slip casting coupling of boring 7, at the outside slip casting calculus body 8 that forms of feeler lever;
(5) connect wire 5 testing sensor 3 working conditions and instrument calibrations;
(6) carry out monitoring.
This example is only the concrete form of implementation of one of the present invention, and its mesopore position is selected, boring ginsengNumber, feeler lever profile, sensor group quantity, material are selected with arrangement form according to concrete geology barConditions such as part, crustal stress state, excavation and supporting requirement and determining, the present invention does not do concrete restriction.
The above is the preferred embodiment of the present invention, it should be pointed out that for the artThose of ordinary skill, not departing under the prerequisite of principle of the present invention, can also doGo out some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. a stress field of the surrounding rock boring monitoring feeler lever, is characterized in that: comprise rigid rod (1),Flexible link (2), sensor (3), waterproof membrane (4), wire (5) and data collecting instrument (6),Rigid rod (1) is alternately connected with flexible link (2), in rigid rod (1) and flexible link (2)Portion's hollow, forms body of rod internal cavities (9), and wire (5) is through body of rod internal cavities (9)Be connected with data collecting instrument (6), sensor (3) is arranged on rigid rod (1) outside, andSensor (3) contacts with rigid rod (1) outer surface plane, and waterproof membrane (4) covers justProperty bar (1) and flexible link (2) outside.
2. stress field of the surrounding rock boring monitoring feeler lever according to claim 1, its feature existsIn: described rigid rod (1) is threaded connection or nested connection with flexible link (2), singleThe length of rigid rod (1) is less than the length of single flexible bar (2).
3. stress field of the surrounding rock boring monitoring feeler lever according to claim 1, its feature existsIn: described sensor (3) is arranged on rigid rod (1) outer surface and is plane contact, eachThe upper two group four-way sensors (3) of laying of rigid rod (1), comply with to corresponding polar angle in four directionsInferior is 0,90,180 and 270 degree, and conllinear direction is one group, the upper each group of biography of rigid rod (1)Sensor (3) line of centres and rigid rod (1) body of rod center line are orthogonal.
4. stress field of the surrounding rock boring monitoring feeler lever according to claim 1, its feature existsIn: described waterproof membrane (4) fully contacts with sensor (3).
5. stress field of the surrounding rock boring monitoring feeler lever according to claim 1, its feature existsBe that rubber, plastic cement or other possess elastoplasticity material in: described flexible link (2) material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610140087.1A CN105606278A (en) | 2016-03-11 | 2016-03-11 | Drill hole monitoring probing rod for surrounding rock stress field |
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| CN201610140087.1A CN105606278A (en) | 2016-03-11 | 2016-03-11 | Drill hole monitoring probing rod for surrounding rock stress field |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106289943A (en) * | 2016-07-25 | 2017-01-04 | 西南石油大学 | Drilling well disturbance go into the well week surrouding rock stress monitor experimental system in real time |
| CN107036737A (en) * | 2017-06-15 | 2017-08-11 | 安徽理工大学 | A kind of recyclable mining induced stress monitoring probe |
| CN107630711A (en) * | 2017-10-25 | 2018-01-26 | 中国矿业大学(北京) | A kind of roadway surrounding rock stress and the monitoring device and method of displacement |
| CN108194139A (en) * | 2017-12-29 | 2018-06-22 | 山东大学 | Tunnel mechanics monitoring instrument protective device and application method |
| CN109029235A (en) * | 2018-06-26 | 2018-12-18 | 山东科技大学 | A kind of mechanical swelling type hole wall deformation sensor and monitoring application method for drilling |
| CN109307534A (en) * | 2018-12-10 | 2019-02-05 | 山东科技大学 | A kind of prearranged pillar STABILITY MONITORING device and construction method |
| CN111119860A (en) * | 2019-12-23 | 2020-05-08 | 山东科技大学 | Pressure bar for sensing pressure distribution state in hole |
| CN114646411A (en) * | 2022-03-14 | 2022-06-21 | 西安科技大学 | Intelligent wireless multidirectional continuous drilling stress monitoring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106289943A (en) * | 2016-07-25 | 2017-01-04 | 西南石油大学 | Drilling well disturbance go into the well week surrouding rock stress monitor experimental system in real time |
| CN106289943B (en) * | 2016-07-25 | 2019-09-03 | 西南石油大学 | Drilling well disturbs all surrouding rock stress real-time monitoring experimental systems of going into the well |
| CN107036737A (en) * | 2017-06-15 | 2017-08-11 | 安徽理工大学 | A kind of recyclable mining induced stress monitoring probe |
| CN107630711A (en) * | 2017-10-25 | 2018-01-26 | 中国矿业大学(北京) | A kind of roadway surrounding rock stress and the monitoring device and method of displacement |
| CN107630711B (en) * | 2017-10-25 | 2019-08-16 | 中国矿业大学(北京) | A kind of monitoring device and method of roadway surrounding rock stress and displacement |
| CN108194139B (en) * | 2017-12-29 | 2019-06-21 | 山东大学 | Tunnel mechanics monitoring instrument protective device and application method |
| CN108194139A (en) * | 2017-12-29 | 2018-06-22 | 山东大学 | Tunnel mechanics monitoring instrument protective device and application method |
| CN109029235A (en) * | 2018-06-26 | 2018-12-18 | 山东科技大学 | A kind of mechanical swelling type hole wall deformation sensor and monitoring application method for drilling |
| CN109307534A (en) * | 2018-12-10 | 2019-02-05 | 山东科技大学 | A kind of prearranged pillar STABILITY MONITORING device and construction method |
| CN111119860A (en) * | 2019-12-23 | 2020-05-08 | 山东科技大学 | Pressure bar for sensing pressure distribution state in hole |
| CN111119860B (en) * | 2019-12-23 | 2023-01-10 | 山东科技大学 | Pressure bar for sensing pressure distribution state in hole |
| CN114646411A (en) * | 2022-03-14 | 2022-06-21 | 西安科技大学 | Intelligent wireless multidirectional continuous drilling stress monitoring device |
| CN114646411B (en) * | 2022-03-14 | 2024-05-31 | 西安科技大学 | Intelligent wireless multidirectional continuous drilling stress monitoring device |
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Application publication date: 20160525 |
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