CN107478357A - Stress field of the surrounding rock crack field Integrated Monitoring System and quantitatively determine method - Google Patents

Stress field of the surrounding rock crack field Integrated Monitoring System and quantitatively determine method Download PDF

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Publication number
CN107478357A
CN107478357A CN201710504195.7A CN201710504195A CN107478357A CN 107478357 A CN107478357 A CN 107478357A CN 201710504195 A CN201710504195 A CN 201710504195A CN 107478357 A CN107478357 A CN 107478357A
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CN
China
Prior art keywords
monitoring
crack
stress
water
water pocket
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CN201710504195.7A
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Chinese (zh)
Inventor
文志杰
张瑞新
杜婉君
孟祥旭
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山东科技大学
青岛正方能源科技有限公司
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Priority to CN201710504195.7A priority Critical patent/CN107478357A/en
Publication of CN107478357A publication Critical patent/CN107478357A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00Measuring force or stress, in general
    • G01L1/02Measuring force or stress, in general by hydraulic or pneumatic means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082Investigating permeability by forcing a fluid through a sample
    • G01N15/0826Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications

Abstract

The present invention proposes a kind of stress field of the surrounding rock crack field Integrated Monitoring System and quantitatively determines method, in stress field monitoring assembly, pedestal offers balancing gate pit, slideway, pressing head seat is slidably connected on slideway, pressure head is provided with pressing head seat, balancing gate pit connects oil pump through high-pressure oil pipe, and oil pressure gauge is provided with high-pressure oil pipe;In hole wall crack field monitoring assembly, monitoring fractures instrument signal connection camera monitoring main frame;In the monitoring assembly of internal crack field, the both ends of supporter set preceding water pocket and rear water pocket respectively, and water pump connects preceding water pocket water pocket with after respectively through water pipe, and preceding water pocket or rear water pocket are connected with safety valve, the leakage hole of safety valve is provided with water pressure gauge and flowmeter between preceding water pocket and rear water pocket on water pipe.Beneficial effects of the present invention:Monitor stress field of the surrounding rock, country rock hole wall surface crack field and quantitative analysis simultaneously or monitor stress field of the surrounding rock, country rock internal crack field and quantitative analysis simultaneously.

Description

Stress field of the surrounding rock crack field Integrated Monitoring System and quantitatively determine method
Technical field
The present invention relates to underground engineering wall rock stress field crack field monitoring technical field, more particularly to a kind of surrouding rock stress Field crack field Integrated Monitoring System.
Background technology
During underground engineering structure excavates (or development of resources), underground space structure excavates front wall rock mass and is in original Original stress equilibrium state, the action attacks original stress equilibrium of country rock body is excavated, necessarily causes the change of country rock body in certain limit Shape, destruction, develop because mining stress field continues to develop with excavation, and the evolution of stress field brings corresponding adopt to split The evolution of gap field, it may be said that adopt and its change of stress field turns to mining-induced fissure field formation and development (evolution) and provides necessary bar Part, and the evolution of country rock body crack field-stress field be likely to occur roof collapse with to press, roof and floor shift near, under support stand under load contracting, The ore deposit pressure phenomenon such as lose, and then induce the dynamic disasters such as coal and gas prominent, gushing water, bump.
Country rock body mining induced fissure is due to the redistribution of stress that country rock is born by mining influence, and initial fissure be Stress, which continues to develop, to be expanded and is mutually communicated and is formed, and these crack fields control and affected the stability of country rock body. Crustal stress size is that the disaster such as underground engineering structure digging, supporting and Roof Control (containing impulsion pressure), coal and gas prominent is pre- Anti- underlying parameter, test and assessment country rock body stress are the main contents of pressure observation, are to solve the underground by mining influence The control of engineering structure country rock body, coal mining programming, underground passage position reasonable selection and maintenance, bump and coal with The decision-making foundation of the key technical problem such as resource security exploitation in gas outbursts Prediction and preventing and treating, artesian water.
The monitoring of crack field and stress field in country rock body is an extremely complex engineering, is answered in underground engineering The field of force and crack field test device category is less and style sheet one.
Notification number is that CN205506271U Chinese patent literature discloses a kind of stress field of the surrounding rock drilling monitoring feeler lever, bag Rigid rod, flexible link, sensor, waterproof membrane, wire, data collecting instrument are included, rigid rod and flexible link alternately connect, inside the body of rod It is cavity, sensor is connected with wire, and sensor is arranged on rigid rod, and waterproof membrane is arranged on the outside of the whole body of rod, wire Lead to body of rod end by body of rod internal cavities and connect data collecting instrument.The technical scheme can realize the stress prison to country rock Survey, but wall-rock crack field can not be monitored simultaneously, and its stress monitoring to country rock need to couple in slip casting in drilling, and operation is numerous It is trivial.
Notification number is that CN104632075B Chinese patent literature discloses a kind of brill survey one for the detection of overlying strata crack Body system and method, system include inserting tube, drilling apparatus and control device;Inserting tube body of rod top is cased with sealing of hole capsule, sealing of hole Capsule both ends are fixed by the convex platform on inserting tube and lower convex platform respectively, and sealing of hole capsule is electric three passes ball valve, under Groove is provided with the inserting tube body of rod of boss bottom.The technical scheme can realize that excavation drilling is detected while entered with overlying strata crack OK, the crack detection to overlying strata is realized, but stress field of the surrounding rock can not be monitored simultaneously.
The content of the invention
It is an object of the invention to provide a kind of stress field of the surrounding rock crack field Integrated Monitoring System and method is quantitatively determined, Realize and monitor stress field of the surrounding rock, country rock hole wall surface crack field and quantitative analysis simultaneously or monitor stress field of the surrounding rock simultaneously, enclose Rock internal crack field and quantitative analysis.
The present invention provides a kind of stress field of the surrounding rock crack field Integrated Monitoring System, stress field of the surrounding rock crack field integration prison Examining system includes stress field monitoring assembly and crack field monitoring assembly, stress field monitoring assembly assembly connection crack field monitoring group Part;Stress field monitoring assembly includes pedestal, high-pressure oil pipe and oil pump, and pedestal offers balancing gate pit and the cunning connected with balancing gate pit Road, pressing head seat being slidably connected on slideway, pressure head being provided with pressing head seat, balancing gate pit connects oil pump, hydraulic oil through high-pressure oil pipe Oil pressure gauge is provided with pipe;Crack field monitoring assembly is in both hole wall crack field monitoring assembly and internal crack field monitoring assembly One;Hole wall crack field monitoring assembly includes monitoring fractures instrument, vision cable and camera monitoring main frame, and monitoring fractures instrument is through regarding Frequency cable signal connects camera monitoring main frame;Internal crack field assembly includes supporter, preceding water pocket, rear water pocket, water pump and water pipe, The both ends of supporter set preceding water pocket and rear water pocket respectively, water pump through water pipe connect respectively preceding water pocket and after water pocket, preceding water pocket or Water pocket is connected with safety valve afterwards, the leakage hole of safety valve be provided between preceding water pocket and rear water pocket, on water pipe water pressure gauge and Flowmeter.
Further, stress field of the surrounding rock crack field Integrated Monitoring System also includes connecting rod, connecting rod include first bar and Some extension bars, the front end assembly connection stress field monitoring assembly and crack field monitoring assembly of first bar, the rear end of first bar are removable Unload and be connected with some extension bars.
Further, one end of extension bar is provided with elastic pin shaft, and the other end of extension bar is provided with pin-and-hole, after first bar End is provided with pin-and-hole or elastic pin shaft.
Further, pressure head, pin-and-hole, elastic pin shaft are on same straight line.
Further, stress field of the surrounding rock crack field Integrated Monitoring System also includes data processing host, data processing master Machine is connected through data line with oil pressure gauge, camera monitoring main frame, water pressure gauge and flowmeter signal respectively.
Further, monitoring fractures instrument is arranged at the front end of pedestal.
Further, the front end of monitoring fractures instrument is provided with cross foresight.
The present invention also provides a kind of stress field of the surrounding rock crack field integration and quantitatively determines method, using above-mentioned surrouding rock stress Field crack field Integrated Monitoring System, crack field monitoring assembly is hole wall crack field monitoring assembly, is comprised the following steps:
Step 1: reach test to drilling inside underground engineering structure country rock, drilling depth in the place for needing to monitor Required depth simultaneously clears up debris in drilling;
Step 2: by the initial monitoring point in pedestal, the push-in drilling of monitoring fractures instrument and initial monitoring point is set to coordinate Origin, pressure head is directed at assigned direction;
Step 3: opening oil pump, oil pump injects high-voltage oil liquid into balancing gate pit through high-pressure oil pipe, when oil pressure gauge reaches maximum When starting to reduce after value, oil pump is closed, stops injection high-voltage oil liquid and reads the maximum of oil pressure gauge, pass through the maximum of oil pressure gauge Value calculates the stress value of initial monitoring point country rock, and pressure head bounces back to initial position;
Step 4: monitoring fractures instrument scanning initial monitoring point country rock hole wall surface formed picture and by image data transmit to Camera monitoring main frame, the number in crack in picture is gone out by the procedure identification write based on fractal theory and determines initial monitor Point country rock hole wall surface cranny development degree;
Step 5: pedestal, monitoring fractures instrument are continued to elapse to follow-up monitoring point into drilling, and according to step 3 and step Rapid four, the stress value of calculated for subsequent monitoring point country rock, record follow-up monitoring point country rock hole wall surface cranny development degree;
Step 6: according to the stress value of the country rock of each monitoring point and country rock hole wall surface cranny development degree, establish respectively Stress-along boring direction monitoring distance-crack figure.
The present invention also provides a kind of stress field of the surrounding rock crack field integration and quantitatively determines method, using above-mentioned surrouding rock stress Field crack field Integrated Monitoring System, crack field monitoring assembly is internal crack field monitoring assembly, is comprised the following steps:
Step 1: reach test to drilling inside underground engineering structure country rock, drilling depth in the place for needing to monitor Required depth simultaneously clears up debris in drilling;
Step 2: by the initial monitoring point in pedestal, supporter (subsidiary preceding water pocket, rear water pocket) push-in drilling and initial Monitoring point is set to the origin of coordinates, and pressure head is aligned into assigned direction;
Step 3: opening oil pump, oil pump injects high-voltage oil liquid into balancing gate pit through high-pressure oil pipe, when oil pressure gauge reaches maximum When starting to reduce after value, oil pump is closed, stops injection high-voltage oil liquid and reads the maximum of oil pressure gauge, pass through the maximum of oil pressure gauge Value calculates the stress value of initial monitoring point country rock, and pressure head bounces back to initial position;
Step 4: open water pump, water pump through water pipe forward water pocket, after water pocket water filling, preceding water pocket, rear water pocket, which are heaved, is adjacent to brill Hole wall, safety valve is opened when preceding water pocket, the pressure of rear water pocket reclaimed water exceed safety valve threshold value, and leakage hole of the water through safety valve enters Inside space and entrance country rock between preceding water pocket, rear water pocket, the pressure of water pocket reclaimed water is checked just above safety by water pressure gauge Start timing during valve threshold value, and water-carrying capacity is determined by flowmeter, with water leakage in this determination unit interval, and then determine country rock The development degree of internal crack;
Step 5: pedestal, supporter (subsidiary preceding water pocket, rear water pocket) are continued to elapse into drilling to follow-up monitoring point, And according to step 3 and step 4, the stress value of calculated for subsequent monitoring point country rock, record follow-up monitoring point country rock internal crack hair Educate degree;
Step 6: according to the stress value of the country rock of each monitoring point and country rock internal crack development degree, establish respectively stress- Along boring direction monitoring distance-crack figure.
Compared with prior art, stress field of the surrounding rock crack field Integrated Monitoring System of the invention and quantitatively determine method tool There are following characteristics and advantage:
1st, stress field of the surrounding rock crack field Integrated Monitoring System of the invention, can monitor stress field of the surrounding rock, country rock hole simultaneously Wall surface crack field and quantitative analysis, or stress field of the surrounding rock, country rock internal crack field and quantitative analysis are monitored simultaneously.
2nd, stress field of the surrounding rock crack field integration of the invention quantitatively determines method, can monitor stress field of the surrounding rock simultaneously, enclose Petrosal foramen wall surface crack field and quantitative analysis, or stress field of the surrounding rock, country rock internal crack field and quantitative analysis are monitored simultaneously, behaviour Facilitate, monitoring is accurate, and the data monitoring scheme for solving current single type influences whether underground engineering structure excavation plan reality The problem of capable feasibility, economic analysis.
After the embodiment of the present invention is read in conjunction with the figure, the features and advantages of the invention will become clearer.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis These accompanying drawings obtain other accompanying drawings.
Fig. 1 is stress field monitoring assembly, hole in stress field of the surrounding rock crack field Integrated Monitoring System in the embodiment of the present invention 1 The part-structure front view of wall crack field monitoring assembly;
Fig. 2 is stress field monitoring assembly, hole in stress field of the surrounding rock crack field Integrated Monitoring System in the embodiment of the present invention 1 The part-structure side view of wall crack field monitoring assembly;
Fig. 3 is first bar and extension bar in stress field of the surrounding rock crack field Integrated Monitoring System in the embodiment of the present invention 1 or adds Connection diagram between stock;
Fig. 4 is stress field of the surrounding rock crack field Integrated Monitoring System scheme of installation in the embodiment of the present invention 1;
Fig. 5 is to be established in the embodiment of the present invention 1 and example 2 by stress field of the surrounding rock crack field Integrated Monitoring System method Stress-along boring direction monitoring distance-crack figure;
Fig. 6 is that elastic stage adds uninstall process stress-strain relation figure in the embodiment of the present invention 1 and example 2;
Fig. 7 adds uninstall process stress-strain relation figure for the plastic stage in the embodiment of the present invention 1 and example 2;
Fig. 8 is stress field monitoring assembly in stress field of the surrounding rock crack field Integrated Monitoring System in the embodiment of the present invention 2, interior The part-structure front view of portion's crack field monitoring assembly;
Fig. 9 is that the pipeline in the embodiment of the present invention 2 in stress field of the surrounding rock crack field Integrated Monitoring System arranges schematic diagram;
Figure 10 is stress field of the surrounding rock crack field Integrated Monitoring System scheme of installation in the embodiment of the present invention 2;
Wherein, 11, pedestal, 12, balancing gate pit, 13, slideway, 14, pressing head seat, 15, pressure head, 16, high-pressure oil pipe, 17, oil pump, 18th, oil pressure gauge, 21, monitoring fractures instrument, 22, vision cable, 23, camera monitoring main frame, 31, supporter, 311, spilled water hole, 312, Water injection hole, 32, preceding water pocket, 33, rear water pocket, 34, safety valve, 35, water pipe, 351, osculum, 36, water pump, 37, water pressure gauge, 38, Flowmeter, 41, first bar, 42, extension bar, 43, pin-and-hole, 44, elastic pin shaft, 5, data processing host, 51, data line, 6, Drilling.
Embodiment
Embodiment 1
As shown in Figures 1 to 4, the present embodiment provides a kind of stress field of the surrounding rock crack field Integrated Monitoring System, and country rock should Field of force crack field Integrated Monitoring System includes stress field monitoring assembly, crack field monitoring assembly, data processing host 5 and connection Bar, crack field monitoring assembly are hole wall crack field monitoring assembly, stress field monitoring assembly assembly connection hole wall crack field monitoring group Part.Connecting rod includes first bar 41 and some extension bars 42, the front end assembly connection stress field monitoring assembly of first bar 41 and crack Field monitoring assembly, the rear end of first bar 42 is removably connected with some extension bars 42.By connecting extension bar 42, make monitoring assembly Continue to promote into drilling 6, extension bar 42 is regular length, then determines the specific position of monitoring assembly by continued access extension bar 42 Put.
Specifically, the rear end of first bar 42 is provided with pin-and-hole 43 or elastic pin shaft 44, one end setting of extension bar 42 is flexible Bearing pin 44, the other end of extension bar 42 are provided with pin-and-hole 43, and elastic pin shaft 44 is connected together with pin-and-hole 43, to facilitate operating personnel Assembly connection extension bar 42, it is also convenient for operating personnel's dismounting.Pressure head 15, pin-and-hole 43, elastic pin shaft 44 on same straight line, with The position of pressure head 15 in personnel control drilling 6 easy to operation.
Stress field monitoring assembly includes part, the pedestals 11 such as pedestal 11, high-pressure oil pipe 16 and oil pump 17 and offers balancing gate pit 12 and slideway 13, balancing gate pit 12 connected with slideway 13, pressing head seat 14 is slidably connected on slideway 13, pressure is provided with pressing head seat 14 First 15, balancing gate pit 12 connects oil pump 17 through high-pressure oil pipe 16, and oil pressure gauge 18 is provided with high-pressure oil pipe 16.In the effect of oil pump 17 Under, hydraulic oil enters balancing gate pit 12 through high-pressure oil pipe 16, and pressing head seat 14 is pressurized passage on slideway 13, the promotion pressure head of pressing head seat 14 15 pairs of country rock bodies carry out stress loading.After stress test, the relief valve opened on oil pump 17 makes fluid pass back into fuel reserve tank In, country rock hole wall surface cranny development degree is then monitored again.
Hole wall crack field monitoring assembly includes the parts such as monitoring fractures instrument 21, vision cable 22 and camera monitoring main frame 23, Monitoring fractures instrument 21 connects camera monitoring main frame 23 through the signal of vision cable 22.Before monitoring fractures instrument 21 is arranged at pedestal 11 End, monitoring fractures instrument 21 is set to scan visual angle optimal.The front end of monitoring fractures instrument 21 is provided with cross foresight, for adjusting monitoring side To.Monitoring fractures instrument 21 can scan the crack of 6 country rock hole wall surfaces of drilling, and the image data of scanning is passed through vision cable 22 It is transferred to camera monitoring main frame 23.
Data processing host 5 is respectively through data line 51 and oil pressure gauge 18, camera monitoring main frame 23.Pass through oil pressure gauge 18 Determination monitoring point country rock stress value, and data processing host 5, data processing host 5 are transferred to by data line 51 The absolute stress of monitoring point country rock body is calculated by default calculation formula.Camera monitoring main frame 23 is logical after picture processing Remarkable work point distinguishes record, data processing host 5 can be also transferred to by data line 51, data processing host 5 is by dividing shape The procedure identification write based on theory goes out the number in crack in picture and determines monitoring point country rock hole wall surface cranny development journey Degree.
The stress field of the surrounding rock crack field Integrated Monitoring System of the present embodiment, can monitor stress field of the surrounding rock, country rock hole simultaneously Wall surface crack field and quantitative analysis.
The present embodiment provides a kind of stress field of the surrounding rock crack field integration and quantitatively determines method, using above-mentioned surrouding rock stress Field crack field Integrated Monitoring System, comprises the following steps:
Step 1: needing the place that monitors to drilling 6 inside underground engineering structure country rock, 6 depth of drilling reaches Depth needed for test and the debris cleared up in drilling 6.
Step 2: by pedestal 11, monitoring fractures instrument 21 be pushed into drilling 6 in initial monitoring point and initial monitoring point is set to The origin of coordinates, pressure head 15 is directed at assigned direction.
Step 3: opening oil pump 17, oil pump 17 injects high-voltage oil liquid into balancing gate pit 12 through high-pressure oil pipe 16, works as oil pressure gauge 18 reach when starting after maximum to reduce, and close oil pump 17, stop injection high-voltage oil liquid and simultaneously read the maximum of oil pressure gauge 18, lead to The stress value of the maximum value calculation initial monitoring point country rock of oil pressure gauge 18 is crossed, pressure head 15 bounces back to initial position.
Form picture Step 4: monitoring fractures instrument 21 scans initial monitoring point country rock hole wall surface and transmit image data To camera monitoring main frame 23, the number in crack in picture is gone out by the procedure identification write based on fractal theory and determined initial Monitoring point country rock hole wall surface cranny development degree.
Step 5: pedestal 11, monitoring fractures instrument 21 are continued to elapse to follow-up monitoring point into drilling 6, and according to step Three and step 4, the stress value of calculated for subsequent monitoring point country rock, record follow-up monitoring point country rock hole wall surface cranny development degree.
Step 6: according to the stress value of the country rock of each monitoring point and country rock hole wall surface cranny development degree, by data Reason main frame 5 is depicted as stress-along boring direction monitoring distance-crack figure, as shown in Figure 5.
Step 7: after monitoring, camera monitoring main frame 23, data processing host 5 are closed, closes oil pump 17, opens oil Relief valve on pump 17 passes back into accumulator by the fluid in balancing gate pit 12 and high-pressure oil pipe 16, and prison is finally taken out from drilling 6 Component is surveyed, monitoring terminates.
It should be noted that the stress measured above by stress field monitoring assembly is absolute stress, different depth country rock Absolute stress field measurement method and different depth country rock absolute stress computational methods are specific as follows:
(1) different depth country rock absolute stress field measurement method
Different mechanical states will be presented by mining influence in coal (rock) body, linear in elastic stage stress and strain, Add unloading as shown in Figure 6;It is in non-linear relation in moulding stage stress and strain, adds unloading as shown in Figure 7.
Drilling depth is in plastic zone, and coal (rock) body stress state from before drilling is changed into unloading shape after drilling around hole wall State, i.e., moulding state, it will be unloaded according to Fig. 7 curve p-s-q paths, and now pressurize, will add according to q-i-p paths through pressure head 15 Carry, reach as loading continues after p points, stress will be reduced gradually, and now p points stress is the absolute stress of bore detecting position Size, the rest may be inferred, gradually determines moulding area's diverse location absolute stress size;
Drilling depth is in elastic region, and coal (rock) body stress state from before drilling is changed into unloading shape after drilling around hole wall State, i.e. elastic stage, it will unload according to Fig. 6 curve po ' paths, now be pressurizeed through pressure head 15, will be loaded according to o ' p paths, p points Absolute force value size is adds unloading curve crosspoint stress intensity, and the rest may be inferred, gradually determines that elastic region diverse location definitely should Power size.
By elastic region and plastic zone force value size line, you can it is absolute to obtain different depth mining induced stress by field measurement Size curve.
(2) different depth country rock absolute stress computational methods
Stress in Fig. 5-along boring direction monitoring distance-crack figure, will along in boring direction monitoring distance crack Quantity integrates, a certain monitoring point (depth l in can obtaining from initial monitoring point to drilling0Opening position) crack number summation CA, so (number in total crack of gained is C after each monitoring point monitoring in drilling depth l) for drilling afterwardsAlways, CAWith CAlwaysRatio Value is to weigh the coefficient f (D) of this section of borehole fissure development degree.Established such as by the stress of primary rock and cranny development degree coefficient Formula shown in lower, this formula are the another method for quantitatively determining the absolute stress σ values along the drilling a certain measuring point country rock of monitoring direction. If σ0For the stress of primary rock, f (c) is the function that crack number changes with l, then has:
Note:
Absolute stress σ be by the stress in Fig. 5-along in boring direction monitoring distance-crack figure crevasse curve calculate Obtained value.
Occur the fracture area in different stress-strain states, modeling successively around it when underground engineering wall rock excavates Property area, elastic region and initial stress area.And the vertical component of the crustal stress of depth residing for underground engineering body is close to or over rock During the uniaxial compressive strength of stone, or excavate space and can constantly expand in rupture zone and plastic zone when constantly expanding, underground engineering knot Structure will either play pendulum or country rock can not excavate at all at this.So stress-edge drilling side in drafting pattern 5 To monitoring distance-crack figure, and according to the stress curve measured rock mass be divided into fracture area, plastic zone, elastic region and Initial stress area, the data monitoring scheme that can solve current single type according to the distribution in different zones stress and crack can shadow The problem of ringing the feasibility carried out to underground engineering structure excavation plan, economic analysis.To solve the subway by mining influence The country rock body control in tunnel etc., coal mining programming, underground passage position reasonable selection and maintenance, bump and coal with The key technical problem such as resource security exploitation provides decision-making foundation in gas outbursts Prediction and preventing and treating, artesian water.
Embodiment 2
It is in place of stress field of the surrounding rock crack field Integrated Monitoring System in the present embodiment, with the difference in embodiment 1, Crack field monitoring assembly is internal crack field monitoring assembly, stress field monitoring assembly assembly connection internal crack field monitoring assembly. Internal crack field monitoring assembly includes the parts such as supporter 31, preceding water pocket 32, rear water pocket 33, water pump 36 and water pipe 35, supporter 31 both ends set preceding water pocket 32 and rear water pocket 33 respectively, water pump 36 through water pocket 32 before water pipe 35 connects respectively and after water pocket 33, Preceding water pocket 32 or rear water pocket 33 are connected with safety valve 34, the leakage hole of safety valve 34 between preceding water pocket 32 and rear water pocket 33, Water pressure gauge 37 and flowmeter 38 are provided with water pipe 35.
Specifically, supporter 31 is sleeve closed at both ends, front cavity, middle cavity and back cavity are separated into through dividing plate in sleeve Body, the dividing plate between the dividing plate or rear chamber and middle cavity between front cavity and middle cavity set safety valve 34, safety valve 34 Leakage hole be located at middle cavity, water pipe 35 connects front cavity and rear chamber respectively, on sleeve before the parcel of the position of front cavity water Capsule 32, on sleeve after the parcel of the position of rear chamber water pocket 33, offer several in the sleeve lateral wall that preceding water pocket 32 wraps up and let out Water hole 311, offers several spilled water holes 311 in the sleeve lateral wall that rear water pocket 33 wraps up, in the sleeve lateral wall of middle cavity position Offer several water injection holes 312.Termination of the water through water pipe 35 is pressed into front cavity and enters preceding water from spilled water hole 311 by water pump 36 In capsule 32, it is pressed into rear chamber from the osculum 351 of water pipe 35 and enters from spilled water hole 311 in rear water pocket 33.Preceding water pocket 32, rear water Capsule 33 heave be adjacent to drilling 6 hole wall with seal drilling 6 both ends.Hydraulic pressure increases above safety in preceding water pocket 32, rear water pocket 33 During 34 threshold value of valve, water cavity from the entrance of the leakage hole of safety valve 34, entered by the water injection hole 312 on middle cavity inside country rock.
Data processing host 5 is connected through data line 51 with oil pressure gauge 18, water pressure gauge 37 and the signal of flowmeter 38 respectively. Data processing host 5 is transferred to by the stress value of the determination monitoring point country rock of oil pressure gauge 18, and by data line 51, number The absolute stress of monitoring point country rock body is calculated by default calculation formula according to processing main frame 5.Before being checked by water pressure gauge 37 Start timing when water pocket 32, the pressure of the reclaimed water of rear water pocket 33 are just above 34 threshold value of safety valve, and current are determined by flowmeter 38 Amount, with water leakage in this determination unit interval, and then determine the development degree of country rock internal crack.
The stress field of the surrounding rock crack field Integrated Monitoring System of the present embodiment, stress field of the surrounding rock can be monitored simultaneously, in country rock Portion's crack field and quantitative analysis.
The present embodiment provides a kind of stress field of the surrounding rock crack field integration and quantitatively determines method, using above-mentioned surrouding rock stress Field crack field Integrated Monitoring System, comprises the following steps:
Step 1: needing the place that monitors to drilling 6 inside underground engineering structure country rock, 6 depth of drilling reaches Depth needed for test and the debris cleared up in drilling 6.
Step 2: pedestal 11, supporter 31 (subsidiary preceding water pocket 32, rear water pocket 33) are pushed into the initial monitor in drilling 6 Initial monitoring point is simultaneously set to the origin of coordinates by point, and pressure head 15 is aligned into assigned direction.
Step 3: opening oil pump 17, oil pump 17 injects high-voltage oil liquid into balancing gate pit 12 through high-pressure oil pipe 16, works as oil pressure gauge 18 reach when starting after maximum to reduce, and close oil pump 17, stop injection high-voltage oil liquid and simultaneously read the maximum of oil pressure gauge 18, lead to The stress value of the maximum value calculation initial monitoring point country rock of oil pressure gauge 18 is crossed, pressure head 15 bounces back to initial position.
Step 4: open water pump 36, water pump 36 through water pipe 35 forward water pocket 32, after the water filling of water pocket 33, preceding water pocket 32, rear water Capsule 33 heaves the inwall for being adjacent to drilling 6, safety valve 34 when preceding water pocket 32, the pressure of the reclaimed water of rear water pocket 33 exceed 34 threshold value of safety valve Open, water through the leakage hole of safety valve 34 enter preceding water pocket 32, after space between water pocket 33 and enter inside country rock, pass through water Pressure table 37 check preceding water pocket 32, the reclaimed water of rear water pocket 33 pressure just above safety valve 34 threshold value when start timing, and pass through stream Scale 38 determines water-carrying capacity, with water leakage in this determination unit interval, and then determines the development degree of country rock internal crack.
Step 5: pedestal 11, supporter 31 (subsidiary preceding water pocket 32, rear water pocket 33) are continued to elapse to rear into drilling 6 Continuous monitoring point, and according to step 3 and step 4, the stress value of calculated for subsequent monitoring point country rock, record in follow-up monitoring point country rock Portion's cranny development degree.
Step 6: according to the stress value of the country rock of each monitoring point and country rock internal crack development degree, by data processing master Machine 5 is depicted as stress-along boring direction monitoring distance-crack figure, similar Fig. 5.
Step 7: after monitoring, water data processing host 5 is closed, switches off the pump 36, opens the sluicing on water pump 36 Valve, the water discharge in preceding water pocket 32, rear water pocket 33 finish, and close oil pump 17, open the relief valve on oil pump 17 by balancing gate pit 12 Accumulator is passed back into the fluid in high-pressure oil pipe 16, finally takes out monitoring assembly from drilling 6, monitoring terminates.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck The variations, modifications, additions or substitutions that the technical staff in domain is made in the essential scope of the present invention, it should also belong to the present invention's Protection domain.

Claims (10)

  1. A kind of 1. stress field of the surrounding rock crack field Integrated Monitoring System, it is characterised in that:Stress field of the surrounding rock crack field integration prison Examining system includes stress field monitoring assembly and crack field monitoring assembly, stress field monitoring assembly assembly connection crack field monitoring group Part;Stress field monitoring assembly includes pedestal, high-pressure oil pipe and oil pump, and pedestal offers balancing gate pit and the cunning connected with balancing gate pit Road, pressing head seat being slidably connected on slideway, pressure head being provided with pressing head seat, balancing gate pit connects oil pump, hydraulic oil through high-pressure oil pipe Oil pressure gauge is provided with pipe;Crack field monitoring assembly is in both hole wall crack field monitoring assembly and internal crack field monitoring assembly One;Hole wall crack field monitoring assembly includes monitoring fractures instrument, vision cable and camera monitoring main frame, and monitoring fractures instrument is through regarding Frequency cable signal connects camera monitoring main frame;Internal crack field monitoring assembly include supporter, preceding water pocket, rear water pocket, water pump and Water pipe, the both ends of supporter set preceding water pocket and rear water pocket respectively, and water pump connects preceding water pocket water pocket, preceding water with after respectively through water pipe Capsule or rear water pocket are connected with safety valve, and the leakage hole of safety valve is provided with hydraulic pressure between preceding water pocket and rear water pocket on water pipe Table and flowmeter.
  2. 2. stress field of the surrounding rock crack field Integrated Monitoring System according to claim 1, it is characterised in that:Stress field of the surrounding rock Crack field Integrated Monitoring System also includes connecting rod, and connecting rod includes first bar and some extension bars, the front end assembling of first bar Connection stress field monitoring assembly and crack field monitoring assembly, the rear end of first bar are removably connected with some extension bars.
  3. 3. stress field of the surrounding rock crack field Integrated Monitoring System according to claim 2, it is characterised in that:The one of extension bar End is provided with elastic pin shaft, and the other end of extension bar is provided with pin-and-hole, and the rear end of first bar is provided with pin-and-hole or elastic pin shaft.
  4. 4. stress field of the surrounding rock crack field Integrated Monitoring System according to claim 3, it is characterised in that:Pressure head, pin-and-hole, Elastic pin shaft is on same straight line.
  5. 5. stress field of the surrounding rock crack field Integrated Monitoring System according to claim 1, it is characterised in that:Stress field of the surrounding rock Crack field Integrated Monitoring System also includes data processing host, data processing host respectively through data line and oil pressure gauge, Camera monitoring main frame, water pressure gauge connect with flowmeter signal.
  6. 6. stress field of the surrounding rock crack field Integrated Monitoring System according to claim 1, it is characterised in that:Monitoring fractures instrument It is arranged at the front end of pedestal.
  7. 7. stress field of the surrounding rock crack field Integrated Monitoring System according to claim 1, it is characterised in that:Monitoring fractures instrument Front end be provided with cross foresight.
  8. 8. stress field of the surrounding rock crack field Integrated Monitoring System according to claim 1, it is characterised in that:Supporter is two The sleeve that end seal is closed, sleeve is interior to be separated into front cavity, middle cavity and rear chamber, the dividing plate between front cavity and middle cavity through dividing plate Or the dividing plate between rear chamber and middle cavity sets safety valve, the leakage hole of safety valve is located at middle cavity, and water pipe connects respectively Front cavity and rear chamber, on sleeve before the parcel of the position of front cavity water pocket, on sleeve after the parcel of the position of rear chamber water pocket, Several spilled water holes are offered in the sleeve lateral wall of preceding water pocket parcel, offering several in the sleeve lateral wall of rear water pocket parcel lets out Water hole, several water injection holes are offered in the sleeve lateral wall of middle cavity position.
  9. 9. a kind of stress field of the surrounding rock crack field integration quantitatively determines method, using the stress field of the surrounding rock described in claim 1 to 8 Crack field Integrated Monitoring System, crack field monitoring assembly are hole wall crack field monitoring assembly, it is characterised in that including following step Suddenly:
    Step 1: reach in the place for needing to monitor to drilling inside underground engineering structure country rock, drilling depth needed for test Depth simultaneously clears up debris in drilling;
    Step 2: by the initial monitoring point in pedestal, the push-in drilling of monitoring fractures instrument and initial monitoring point is set to the origin of coordinates, Pressure head is directed at assigned direction;
    Step 3: opening oil pump, oil pump injects high-voltage oil liquid into balancing gate pit through high-pressure oil pipe, after oil pressure gauge reaches maximum When starting to reduce, oil pump is closed, stops injection high-voltage oil liquid and reads the maximum of oil pressure gauge, pass through the maximum meter of oil pressure gauge The stress value of initial monitoring point country rock is calculated, pressure head bounces back to initial position;
    Step 4: monitoring fractures instrument scanning initial monitoring point country rock hole wall surface forms picture and transmits image data to shooting Main frame is monitored, the number in crack in picture is gone out by the procedure identification write based on fractal theory and determines that initial monitoring point is enclosed Petrosal foramen wall surface cranny development degree;
    Step 5: pedestal, monitoring fractures instrument are continued to elapse to follow-up monitoring point into drilling, and according to step 3 and step Four, the stress value of calculated for subsequent monitoring point country rock, record follow-up monitoring point country rock hole wall surface cranny development degree;
    Step 6: according to the stress value of the country rock of each monitoring point and country rock hole wall surface cranny development degree, establish stress-edge and bore Hole direction monitoring distance-crack figure.
  10. 10. a kind of stress field of the surrounding rock crack field integration quantitatively determines method, using the surrouding rock stress described in claim 1 to 8 Field crack field Integrated Monitoring System, crack field monitoring assembly is internal crack field monitoring assembly, it is characterised in that including following Step:
    Step 1: reach in the place for needing to monitor to drilling inside underground engineering structure country rock, drilling depth needed for test Depth simultaneously clears up debris in drilling;
    Step 2: by the initial monitoring point in pedestal, supporter (subsidiary preceding water pocket, rear water pocket) push-in drilling and initial monitor Point is set to the origin of coordinates, and pressure head is aligned into assigned direction;
    Step 3: opening oil pump, oil pump injects high-voltage oil liquid into balancing gate pit through high-pressure oil pipe, after oil pressure gauge reaches maximum When starting to reduce, oil pump is closed, stops injection high-voltage oil liquid and reads the maximum of oil pressure gauge, pass through the maximum meter of oil pressure gauge The stress value of initial monitoring point country rock is calculated, pressure head bounces back to initial position;
    Step 4: open water pump, water pump through water pipe forward water pocket, after water pocket water filling, preceding water pocket, rear water pocket, which are heaved, is adjacent to drilling Wall, safety valve is opened when preceding water pocket, the pressure of rear water pocket reclaimed water exceed safety valve threshold value, before leakage hole of the water through safety valve enters Inside space and entrance country rock between water pocket, rear water pocket, the pressure of water pocket reclaimed water is checked just above safety valve by water pressure gauge Start timing during threshold value, and water-carrying capacity is determined by flowmeter, with water leakage in this determination unit interval, and then determine in country rock The development degree in portion crack;
    Step 5: pedestal, supporter (subsidiary preceding water pocket, rear water pocket) are continued to elapse to follow-up monitoring point into drilling, and pressed According to step 3 and step 4, the stress value of calculated for subsequent monitoring point country rock, follow-up monitoring point country rock internal crack development journey is recorded Degree;
    Step 6: according to the stress value of the country rock of each monitoring point and country rock internal crack development degree, stress-edge is established respectively and is bored Hole direction monitoring distance-crack figure.
CN201710504195.7A 2017-06-28 2017-06-28 Stress field of the surrounding rock crack field Integrated Monitoring System and quantitatively determine method CN107478357A (en)

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