CN104391042B - With the method for ultrasonic listening mine goaf roof and floor deep rock crack - Google Patents
With the method for ultrasonic listening mine goaf roof and floor deep rock crack Download PDFInfo
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- CN104391042B CN104391042B CN201410547097.8A CN201410547097A CN104391042B CN 104391042 B CN104391042 B CN 104391042B CN 201410547097 A CN201410547097 A CN 201410547097A CN 104391042 B CN104391042 B CN 104391042B
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Abstract
The invention discloses a kind of method of use ultrasonic listening mine goaf roof and floor deep rock crack, mainly by ultrasonic type survey meter detection bar be placed in goaf top, base plate drilling in, the ultrasonic propagation time of segmentation detection drilling, until whole bore detecting terminates；After after working face extraction, the ultrasonic propagation time of detection drilling is segmented again using original method；According to working face extraction it is forward and backward segmentation detection time and transmitting, receive transducer apart from l, ultrasonic wave spread speed in the borehole is calculated respectively, again with spread speed V as Y-axis, with drilling depth L as X-axis, the forward and backward roof and floor V L-curve figures of drawing face back production；The contrast forward and backward curve map Changing Pattern of working face extraction, draws working face roof and floor cranny development rule.The characteristic that the present invention is increased using ultrasonic velocity and reduced with rock mass fracture growth, compared with detection method of the tradition using leak number of dropouts as evaluation index, detection accuracy is high.
Description
Technical field
The present invention relates to rock masses fracturing Detection Techniques, more particularly to mine working face goaf roof and floor deep rock crack
Detection Techniques.
Background technology
Under normal circumstances, after the mine coal-cutting advance of the face, goaf top plate top occur caving zone, fissure zone and
Slow sinking band, occurs that water guide destruction band, effective water barrier protection band and artesian water lead a liter band in base plate.Push up mine goaf
Floor crack (destruction) band is the passage that mine water enters goaf, generally appears in roof and floor deep rock stratum scope
Interior, such as roof fracture band is located at 40~80m of top board top.Understand work face goaf adjoining rock fissure zone development scope pair
It is significant in building, public affairs (iron) road and underwater mining and base plate Mining Above Confined Aquifer；Simultaneously to burst trend
Property, the safely mining of coalbed of coal and gas prominent tendency, coal and coal bed gas are adopted altogether and shallow coal-layer water-retaining production also has one
Fixed effect.
Fissure zone detection instrument generally uses both-end water block device in work face goaf adjoining rock.Chinese patent (Shen
Number please 90106348.7) disclose it is a kind of using both-end water block device to drilling subsection water injection technology, by both-end water blockoff in drilling
Device water leakage determines coal-face adjoining rock fractured situation.This technology includes：1. (bored in tunnel using geological drilling rig
Machine) drilled to goaf top plate (base plate), the segmentation of both-end water block device is put into and faces upward tiltedly (bow tiltedly) drilling, its lower end and high pressure gas
The connection of pipe, drilling rod and water flow monitor；2. High-pressure air valve, ventilation distending two ends air bag, certain section closure that drills are opened；③
After air bag deployment reaches certain pressure, to end water filling is blocked, by determining the size of different depth water wastage in drilling, really
Determine adjoining rock fractured zones rule.The shortcoming that above-mentioned patent is present：1. due to the water filling between air bag is blocked, hydraulic pressure is larger
Shi Yi makes sealing of hole air bag relax, and plug-hole reliability decrease, water flows out from lower airbag, increased both-end water block device leak loss
Amount, detection accuracy is low, it is impossible to obtain authentic and valid result；2. hydraulic pressure is difficult to control to, and water injection pipe and flowmeter easily burst apart, behaviour
Make difficult；3. both-end water block device weight is larger, is difficult the passage in drilling, and easily blocks, and work workload is big.
The content of the invention
In order to overcome the shortcomings of existing use water wastage detection crack method, the present invention is according to ultrasonic technology, there is provided
A kind of detection accuracy is high, maneuverable detection method, specific as follows：
The first step：Drilled to goaf top, base plate
Before working face extraction, in the tunnel near working face, drilled through to top, base plate using geological drilling rig or underground drill rig
The drilling of certain depth, water-filling borehole cleaning after pore-forming；
Second step：Assembling and arrangement ultrasonic type survey meter
Ultrasonic type survey meter detects bar, ultrasonic wave control main frame, connecting rod, communication cable and pressure regulation and notes by ultrasonic type
Water installations are constituted；So-called ultrasonic type detection bar is a gapless sound insulation bar, bar 2m long or so, away from the upper end of sound insulation bar
Transmitting transducer is fixed with 10cm, receive transducer is fixed with the lower end 10cm of sound insulation bar, in the lower end of sound insulation bar
Head is screwed connector, can be connected with connecting rod by connector；So-called connecting rod is by more piece gapless hollow stem
It is formed by connecting, hollow stem one end is provided with nut, the other end is provided with stud, can be connected with each other more piece gapless hollow stem；Ultrasound
Ripple control main frame is connected by communication cable with transmitting transducer and receive transducer, controlling the exciting of ultrasonic wave, receive and
Record ultrasonic propagation time；So-called pressure control water filling device is by pressure regulation water filling console, capsule water injection pipe, water injection hole packer
Constitute, wherein pressure regulation water filling console is provided with water pressure gauge and water filling pressure regulating valve；
Ultrasonic type detection bar is placed in drilling, connecting rod is connected, while water injection pipe is entered through water injection hole packer
In drilling, water injection hole packer is then promoted to carry out sealing of hole into drilling；
3rd step：The ultrasonic propagation time T that bar is segmented detection drilling is detected with ultrasonic type
First, ultrasonic type detection bar is advanced 2m in drilling；Operation pressure regulation water filling device, water under high pressure is noted by capsule
Water pipe is to pouring water into borehole, and water filling in real time is keeping hydraulic pressure basicly stable；Open ultrasonic wave control main frame, excite detection bar in
Transmitting transducer produces ultrasonic wave, ultrasonic wave to be propagated along the wall of a borehole, and ultrasonic wave control main frame Timer starts timing, waiting
After receipts transducer receives ultrasonic wave, timer stops timing, now ultrasonic wave control main frame display ultrasonic propagation time T；
After the completion of record, ultrasonic type detection bar is continued to advance 2m, repeat aforesaid operations step, circulation is carried out, until
Whole bore detecting terminates；
4th step：After after working face extraction, using original drilling ultrasound that segmentation detection drills again according to the method described above
Wave propagation time T；
5th step：Detection data is analyzed
Time T and transmitting according to the forward and backward segmentation detection of working face extraction, receive transducer apart from l, calculate respectively super
Sound wave spread speed V in the borehole：
Again respectively with spread speed V as Y-axis, with drilling depth L as X-axis, the forward and backward roof and floor V-L of drawing face back production
Curve map；
The contrast forward and backward V-L curve maps Changing Pattern of working face extraction, draws working face roof and floor cranny development rule.
Compared with other are to fissure zone Detection Techniques in work face goaf adjoining rock, the present invention has following advantage：
1st, it is of the invention using ultrasonic velocity as the evaluation index of roof strata cranny development degree, using ultrasonic velocity
The characteristic for increasing with rock mass fracture growth and reducing, compared with detection method of the tradition using leak number of dropouts as evaluation index,
Detection accuracy is high.
2nd, during when the present invention is detected at the scene, realize sending and receiving ultrasonic waves and automatically control and relevant parameter
Automatic to obtain, exclusion human factor as small as possible compared with traditional manual recording parameters, is visited to the adverse effect of result of detection
Survey high precision.
3rd, ultrasonic type survey meter simple structure of the present invention, weight are small, at the scene in operating process, the impelling ratio in drilling
It is lighter, quick, efficient, when being developed particularly with detection operations face deep rock crack, can more highlight such advantage.
Brief description of the drawings
Fig. 1 is the schematic diagram of embodiment, and transmitting-receiving ultrasonic type overlying strata crack detection system deployment scenarios are shown in figure；
Fig. 2 is water injection hole packer structural front view；
Fig. 3 is water injection hole packer structural side view.
Marginal data：1-transmitting transducer；2-sound insulation bar；3-receive transducer；4-hollow connecting rod；5-ultrasound
Ripple control main frame；6-communication cable；7-water injection hole packer；8-pressure regulation water filling device；9-water injection regulating valve；10-pressure
Table；11-capsule water injection pipe；12-drilling；13-communication cable passage；14-capsule water filling tube passage；15-connecting rod is led to
Road.
Specific embodiment
Specific embodiment of the invention is described in detail with reference to Fig. 1.
The first step：Drilled to goaf top, base plate
Before working face extraction, in the tunnel near working face, drilled through to top, base plate using geological drilling rig or underground drill rig
The drilling 12 of certain depth, water-filling borehole cleaning after pore-forming；
Second step：Assembling and arrangement ultrasonic type survey meter
Ultrasonic type survey meter detects bar, ultrasonic wave control main frame 5, hollow connecting rod 4, communication cable 6 by ultrasonic type
Constituted with pressure regulation water filling device 8；So-called ultrasonic type detection bar is a gapless sound insulation bar 2, bar 2.0m long or so, away from sound insulation
Transmitting transducer 1 is fixed with the upper end 10cm of bar 2, receive transducer 3 is fixed with the lower end 10cm of sound insulation bar 2,
It is screwed connector in the lower end of sound insulation bar 2, can be connected with hollow connecting rod 4 by connector；It is so-called hollow
Connecting rod 4 is formed by connecting by more piece gapless hollow stem, and hollow stem one end is provided with nut, and the other end is provided with stud, is made many
Section is connected with each other；Ultrasonic wave control main frame 5 is connected by communication cable 6 with transmitting transducer 1 and receive transducer 3, to control
Ultrasonic wave excites and receives and record ultrasonic propagation time；So-called pressure control water filling device 8 be by pressure regulation water filling console,
Capsule water injection pipe 11 and water injection hole packer 7 are constituted, and wherein pressure regulation water filling console is provided with water pressure gauge 10 and water injection regulating valve 9；Such as
Fig. 2, shown in 3, water injection hole packer 7 is provided with communication cable passage 13, capsule water filling tube passage 14 and connecting rod passage on capsule
15；
Ultrasonic type detection bar is placed in drilling 12, hollow connecting rod 4 is connected, capsule water injection pipe 11 is noted through capsule
Water pipe channel 14 enters in drilling 12, while communication cable 6 is through the communication cable passage 13 in water injection hole packer 7, with ultrasound
Ripple control main frame 5 is connected, and then promoting water injection hole packer 7 to enter drilling 12 manually carries out sealing of hole；
3rd step：The ultrasonic propagation time T that bar is segmented detection drilling 12 is detected with ultrasonic type
First, ultrasonic type detection bar is advanced 2.0m in drilling；Operation pressure regulation water filling device 8, water under high pressure passes through glue
Capsule water injection pipe 11 is to 12 water fillings that drill, and water filling in real time is keeping hydraulic pressure basicly stable；Ultrasonic wave control main frame 5 is opened, is swashed
Transmitting transducer 1 produces ultrasonic wave, ultrasonic wave to be propagated along the wall of a borehole in hair feeler lever, and the Timer of ultrasonic wave control main frame 5 is opened
Beginning timing, after transducer to be received 3 receives ultrasonic wave, timer stops timing, and now ultrasonic wave control main frame 5 shows ultrasound
Wave propagation time T；
After the completion of record, ultrasonic type detection bar propulsion 2m, aforesaid operations step is repeated, circulation is carried out, until entirely
Bore detecting terminates；
4th step：After after working face extraction, using original drilling ultrasound that segmentation detection drills again according to the method described above
Wave propagation time T；
5th step：Detection data is analyzed
Time T and transmitting according to the forward and backward segmentation detection of working face extraction, receive transducer apart from l, calculate respectively super
Sound wave spread speed V in the borehole：
Again respectively with spread speed V as Y-axis, with aperture as origin, with drilling depth L as X-axis, the back production of drawing face
Forward and backward roof and floor V-L curve maps；
The contrast forward and backward V-L curve maps Changing Pattern of working face extraction, draws working face roof and floor cranny development rule.
Claims (1)
1. the method for a kind of use ultrasonic listening mine goaf roof and floor deep rock crack, it is characterised in that
The first step：Drilled to goaf top, base plate
Before working face extraction, in the tunnel near working face, brill is drilled through to top, base plate using geological drilling rig or underground drill rig
Hole, water-filling borehole cleaning after pore-forming；
Second step：Assembling and arrangement ultrasonic type survey meter
Ultrasonic type survey meter detects bar, ultrasonic wave control main frame, connecting rod, communication cable and pressure regulation water filling and fills by ultrasonic type
Put composition；So-called ultrasonic type detection bar is a gapless sound insulation bar, and bar 2m long is fixed at the upper end 10cm of sound insulation bar
There is transmitting transducer, receive transducer is fixed with the lower end 10cm of sound insulation bar, be with spiral shell in the lower end of sound insulation bar
The connector of line, can be connected by connector with connecting rod；So-called connecting rod is formed by connecting by more piece gapless hollow stem, empty
Core bar one end is provided with nut, and the other end is provided with stud, so that more piece gapless hollow stem is connected with each other；Ultrasonic wave control main frame
It is connected with transmitting transducer and receive transducer by communication cable, ultrasonic wave is excited, receives and record with control ultrasonic wave
Propagation time；So-called pressure control water filling device is made up of pressure regulation water filling console, capsule water injection pipe and water injection hole packer, wherein
Pressure regulation water filling console is provided with water pressure gauge and water filling pressure regulating valve；
Ultrasonic type detection bar is placed in drilling, connecting rod is connected, while water injection pipe is entered drilling through water injection hole packer
It is interior, then promote water injection hole packer to carry out sealing of hole into drilling；
3rd step：The ultrasonic propagation time T that bar is segmented detection drilling is detected with ultrasonic type
First, ultrasonic type detection bar is advanced 2m in drilling；Operation pressure regulation water filling device, water under high pressure passes through capsule water injection pipe
To pouring water into borehole, and water filling in real time is keeping hydraulic pressure basicly stable；Ultrasonic wave control main frame is opened, transmitting in detection bar is excited
Transducer produces ultrasonic wave, ultrasonic wave to be propagated along the wall of a borehole, and ultrasonic wave control main frame Timer starts timing, to be received to change
After energy device receives ultrasonic wave, timer stops timing, now ultrasonic wave control main frame display ultrasonic propagation time T；
After the completion of record, ultrasonic type detection bar propulsion 2m, aforesaid operations step is repeated, circulation is carried out, until whole drilling
Detection terminates；
4th step：After after working face extraction, using original drilling, the ultrasonic wave of segmentation detection drilling is passed again according to the method described above
T between sowing time；
5th step：Detection data is analyzed
According to working face extraction it is forward and backward segmentation detection time T and transmitting, receive transducer apart from l, ultrasonic wave is calculated respectively
Spread speed V in the borehole：
Again respectively with spread speed V as Y-axis, with drilling depth L as X-axis, the forward and backward roof and floor V-L curves of drawing face back production
Figure；
The contrast forward and backward V-L curve maps Changing Pattern of working face extraction, draws working face roof and floor cranny development rule.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410547097.8A CN104391042B (en) | 2014-10-15 | 2014-10-15 | With the method for ultrasonic listening mine goaf roof and floor deep rock crack |
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| CN201410547097.8A CN104391042B (en) | 2014-10-15 | 2014-10-15 | With the method for ultrasonic listening mine goaf roof and floor deep rock crack |
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| CN104391042B true CN104391042B (en) | 2017-06-27 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105467010B (en) * | 2015-12-16 | 2018-04-06 | 山东科技大学 | Relaxation zone test system and method based on rock water coincidence effect in soft rock drilling |
| CN106227973A (en) * | 2016-08-04 | 2016-12-14 | 西北矿冶研究院 | Construction method for safety environment of open stope mining method |
| CN106950288B (en) * | 2017-05-03 | 2018-07-17 | 中国科学院武汉岩土力学研究所 | It is a kind of based on multiple frequency ultrasonic scanning hole in Exhausted area prospecting device and method |
| CN111691872B (en) * | 2020-05-27 | 2021-10-12 | 北京科技大学 | Dynamic and accurate detection method for development range and degree of coal seam overlying strata fracture |
| CN113156506A (en) * | 2021-04-23 | 2021-07-23 | 广西路桥工程集团有限公司 | Tunnel advanced drilling detection device based on tube wave detection and use method thereof |
| CN114893145B (en) * | 2022-06-24 | 2024-04-16 | 渭南陕煤启辰科技有限公司 | Water plugging device for drilling, stratum fracture crushing condition detection equipment and detection method |
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| EP1505252B1 (en) * | 2003-08-08 | 2005-09-28 | Services Petroliers Schlumberger | Multimode acoustic imaging in cased wells |
| CN103336303A (en) * | 2013-06-06 | 2013-10-02 | 浙江大学 | Method of conducting seismic frequency extension by utilizing acoustic logging |
| CN103790594A (en) * | 2014-02-26 | 2014-05-14 | 中铁一局集团有限公司 | Method for exploring and processing interior of boulder hole in front for shield method construction |
Non-Patent Citations (1)
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| 单孔"一发双收"超声波检测原理及其应用;袁波 等;《土工基础》;20110831;第25卷(第4期);第73-74页 * |
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