CN104989389B - A kind of coal mass strength distribution characteristics continuous probe method and device - Google Patents
A kind of coal mass strength distribution characteristics continuous probe method and device Download PDFInfo
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Abstract
A kind of coal mass strength distribution characteristics continuous probe method and device, by the test short circuit original paper that a real-time detection torque-on-bit, the pressure of the drill and drilling depth are connected between drill bit and drilling rod, shorting member is tested by the torque-on-bit detected, the pressure of the drill and the real-time record storage of time signal, and vibration or electromagnetic signal transmission are converted into signal receiver, " depth moment of torsion " curve and " depth the pressure of the drill " curve are finally drawn by signal processor analysis, the information stored in Comprehensive Comparison real-time curve and shorting member draws coal mass strength distribution characteristics.The present invention breaches the test of underground coal mine coal mass strength, and component difficulty is big, forward probe is difficult and test result is difficult to meet the present situation that prediction requires, utilize drill hole information, realize the continuous probe of coal mass strength distribution characteristics in drilling process, its method is easy, test philosophy science, as a result accurately, intelligent and high-efficiency, advanced practicality, there is good application prospect in mine motive force hazard prediction early warning technology field.
Description
Technical field
The present invention relates to mine motive force hazard prediction early warning technology field, more particularly to a kind of coal mass strength distribution characteristics to connect
The method and device of continuous detection.
Background technology
In recent years, with deep increasing is adopted, press continuous rise, mine gas pressure and content also gradually increase underground coal mine
Add, many mines upgrade to bump mine and coal and gas outburst mine, and dynamic disaster takes place frequently.Burst and outburst
Generation Deng dynamic disaster is not only influenceed notable, and the physics of itself such as intensity with coal body, soft or hard degree by crustal stress
Property is closely related.The intensity property of coal body and its change affect the possibility that the dynamic disasters such as prominent and bump occur
Property, it is one of important parameter for predicting mine motive force disaster, therefore, detects different positions in front of tunnel different distance and working face
It is significant to put prediction and prevention of the intensity distribution feature of place's coal body to mine motive force disaster.
The measuring technology of existing coal mass strength has a lot, mostly the fixed point of underground coal mine different zones position coal mass strength
Test.The intensity level and coal body actual strength value deviation that laboratory acquisition coal sample measures are larger；On-the-spot test technology have chip method,
The methods of rebound hardness, cutting method, point carry intensity, these method some are only capable of detecting the list of tunnel fixed position coal body
Axle compression strength, it is impossible to measure the change of coal mass strength in front of working face, some operations are excessively complicated, are as a result difficult to meet to protrude
Deng the requirement of dynamic disaster prediction.And during drilling, influenceed by stress distribution, coal mass strength value is constantly to change
, realize real-time continuous detection to coal mass strength to the prediction and warning of mine motive force disaster extremely when implementing advanced prediction drilling
Close important.The existing technology that coal mass strength test is carried out during underground coal mine is drilled and method are still immature, wangkai, Yu
Qi Xiang proposes the detection using drilling power progress coal mass strength, and drilling power is affected by various factors larger, and it is strong to coal body
The reflection of degree is simultaneously inaccurate, is not used widely in underground；Zhu Liyuan, Li Zhonghua etc. propose a kind of drilling cuttings moment of torsion and visited
Survey method, what this method detected is the moment of torsion that rig is delivered to drilling rod, and its reflection to coal mass strength at drill bit need into one
The checking of step.Comprehensive present status in China, the real-time continuous test to coal mass strength during underground coal mine air exercise is bored is not yet ripe,
In underground coal mine difficulty have application, need a kind of science, accurate method carry out the continuous probe of coal mass strength distribution characteristics, from
And preferably serve the prediction and prevention of underground coal mine dynamic disaster.
The content of the invention
The purpose of the present invention is the deficiency being directed in prior art, there is provided a kind of simple to operate, accurate in real time, high efficiency smart
Coal mass strength distribution characteristics continuous probe method and device.
To achieve these goals, coal mass strength distribution characteristics continuous probe method of the invention, comprises the following steps：
A. while starting rig to coal seam construction drill, the test shorting member being installed between drill bit and drilling rod is being crept into
During start working；
B. drill bit constantly impacts in the presence of rig feed power, peels off coal body, and sends impact endurance test shock signal, impact shake
Dynamic signal is propagated from drill bit to the exposed extreme direction of drilling rod, when impact endurance test shock signal is by test shorting member, by test short circuit member
Part is detected and done and once records, and is designated as time signal t1, impact endurance test shock signal reflects after propagating to drilling rod end, along brill
Bar is detected again to the passback of drill bit direction, then during process test shorting member and the record that tries again, and is designated as time signal t2；
C. after drill bit runs into the coal body of varying strength, torque-on-bit and the pressure of the drill can occur to change accordingly, short by testing
Torque-on-bit and the pressure of the drill signal can be detected and store in real time by connecing element, and test shorting member is simultaneously by the impact endurance test shock detected
Time electric signal t1And t2, torque signal and the pressure of the drill signal be converted to vibration signal or convert the information into electromagnetic signal along drilling rod
Transmit to signal receiver；
D. signal receiver reception signal and signal processor, signal by wire or are wirelessly communicated information to
Processor is according to the time electric signal t of reception1And t2Show that impact endurance test shock signal is completed Once dissemination along drilling rod and taken with reflection
Between t=t1-t2, then drilling depth h=l+a-b can be calculated according to run of steel l=vt/2, drawn at different drilling depths " deep
The corresponding informance of degree-moment of torsion-the pressure of the drill ", and draw " depth-moment of torsion " curve and " depth-the pressure of the drill " curve in real time by display screen,
The variation characteristic of different depth coal mass strength is drawn by the mutation analysis of moment of torsion and the pressure of the drill, realizes that coal body is strong in drilling process
Spend the pre-test of distribution characteristics；In formula：V is spread speed, and a is the length of the bit, and b is the exposed segment length of drilling rod；
E. drilling construction finishes backed off after random drill bit, removes test shorting member, in shorting member record and store when
Between, moment of torsion and the pressure of the drill information analyzed again, contrast " depth-moment of torsion " curve obtained by real-time detection and " depth-the pressure of the drill " be bent
Line, comprehensive analysis draw coal mass strength distribution characteristics at different depth, so as to realize the continuous probe of coal mass strength distribution characteristics.
It is described to be bored to the drilling that coal seam is constructed near horizontal, gently inclined seam work towards at least constructing 3 in front of coal body
Hole.
A kind of coal mass strength distribution characteristics continuous detectiion equipment for realizing the above method, including drill bit, drilling rod, rig, water
Just, a test shorting member is connected between the drill bit and drilling rod, the drilling rod and water just between be connected with one
Signal receiver, signal receiver are connected with signal processor through wire；Described test shorting member diameter is identical with drilling rod,
Threadably it is connected with drill bit and drilling rod, test shorting member includes the strain-type sensing for being built-in with measurable moment of torsion and the pressure of the drill
Device and detectable and record impact shock signal micro-vibration sensor.
Beneficial effect：Because the intensity level of coal body at torque-on-bit, the pressure of the drill and bit location is closely related, torque-on-bit and
The pressure of the drill can accurately reflect the size of coal mass strength at bit location, the present invention using torque-on-bit during drilling,
The dependency relation of coal mass strength, is worth by real-time detection torque-on-bit, the pressure of the drill and drilling depth at the pressure of the drill and its position
Go out the variation characteristic of coal mass strength at different depth, realize the continuous probe of coal mass strength distribution characteristics, be mine motive force calamity
Harmful prevention provides reference.The present invention breaches original underground coal mine coal body for the difficult present situation of mine motive force hazard prediction
Intensity on-the-spot test component difficulty is big, forward probe is difficult and test result is difficult to meet the present situation that prediction requires, by managing
After analysis and laboratory experiment analytic demonstration, using the dependency relation of coal mass strength at torque-on-bit, the pressure of the drill and bit location,
Cleverly between drill bit and drilling rod connect one can with the short circuit original paper of real-time detection torque-on-bit, the pressure of the drill and drilling depth,
By drawing the continuously distributed spy of coal mass strength to the continuous probe of torque-on-bit, the pressure of the drill and drilling depth in drilling process
Sign.Test philosophy science, as a result accurately, the creative dynamic realtime for realizing torque-on-bit, the pressure of the drill and drilling depth detection,
Take full advantage of drill hole information, high efficiency smart, advanced practicality；Coal mass strength is detected in construction common drilling, can be real
When understand tunnel around coal rock strength distribution characteristics, provide authentic and valid coal mass strength for the FORECAST AND PREVENTION of bump
Information；Continuous probe is carried out to coal mass strength distribution characteristics when constructing advanced prediction drilling or extinction drilling, can accurately be detected
Go out the situation of change of square coal mass strength in face of work, the prediction and prevention for the various dynamic disasters of underground coal mine provide important
Reference information.The real-time continuous detection to coal mass strength when coal mine underground construction drills is the composite can be widely applied to, can be coal
The daily production of ore deposit provides important information, has good application prospect in mine motive force hazard prediction early warning technology field.
Brief description of the drawings
Fig. 1 (a) is the coal mass strength distribution characteristics forward probe drilling arrangement schematic diagram of the present invention；
Fig. 1 (b) is Fig. 1 (a) A-A to schematic diagram；
Fig. 2 is the schematic diagram of the drilling depth real-time detection principle of the present invention；
Fig. 3 is the coal mass strength distribution characteristics continuous detectiion equipment structural representation of the present invention.
In figure：1- driving faces, 2- drillings, 3- coal bodies, 4- drill bits, 5- drilling rods, 6- test shorting members, 7- rigs,
8- water just, 9- signal receivers, 10- wires, 11- signal processors, 12- display screens, 13- depth-torque curve, 14- depth-
Load curve, 15- vibrations or the electromagnetic signal direction of propagation, 16- impact endurance test shock signal propagation directions, 17- impact endurance test shocks signal return
Pass direction.
Embodiment
One embodiment of the present of invention is further described below in conjunction with the accompanying drawings：
The coal mass strength distribution characteristics continuous detectiion equipment of the present invention, mainly by drill bit 4, drilling rod 5, rig 7, water just 8, survey
Examination shorting member 6, signal receiver 9 and signal processor 11 are formed, and a survey is connected between described drill bit 4 and drilling rod 5
Shorting member 6 is tried, a signal receiver 9 is connected between described drilling rod 5 and water just 8, signal receiver 9 connects through wire 10
It is connected to signal processor 11；The described diameter of test shorting member 6 is identical with drilling rod 5, with drill bit 4 and drilling rod 5 threadably
Connection, test shorting member 6 include being built-in with the strain gauge transducer of measurable moment of torsion and the pressure of the drill and detectable and record punching
Hit the micro-vibration sensor of vibration signal.
The coal mass strength distribution characteristics continuous probe method of the present invention, step are as follows：
A. while starting rig 7 to 3 construction drill 2 of coal seam, the test shorting member 6 that is installed between drill bit 4 and drilling rod 5
Started working in drilling process；The drilling 2 to the construction of coal seam 3 is before nearly horizontal, gently inclined seam works towards coal body
At least construct 3 and drill in side；
B. drill bit 4 constantly impacts in the presence of the feed power of rig 7, peels off coal body 3, and sends impact endurance test shock signal, rushes
Hit vibration signal to be propagated from drill bit 4 to the exposed extreme direction 16 of drilling rod, when impact endurance test shock signal is by test shorting member 6, by surveying
Examination shorting member 6, which is detected and done, once to be recorded, and is designated as time signal t1, impact endurance test shock signal sends out after propagating to the end of drilling rod 5
Raw reflection, is returned along drilling rod 5 to drill bit direction 17, then by being detected again during test shorting member 6 and the record that tries again,
It is designated as time signal t2；
C. after drill bit 4 runs into the coal body 3 of varying strength, the moment of torsion of drill bit 4 and the pressure of the drill can occur to change accordingly, pass through test
Shorting member 6 can detect and store in real time torque-on-bit and the pressure of the drill signal, and test shorting member 6 simultaneously shakes the impact detected
Dynamic time electric signal t1And t2, torque signal and the pressure of the drill signal be converted to vibration signal or convert the information into electromagnetic signal edge
Drilling rod 5 is transmitted to signal receiver 9；
D. the reception signal of signal receiver 9 and signal processor is communicated information to by wire 10 or wirelessly
11, signal processor 9 is according to the time electric signal t of reception1And t2Draw impact endurance test shock signal along drilling rod 5 complete Once dissemination with
T=t the time required to reflection1-t2, then can calculate drilling depth h=l+a-b according to run of steel l=vt/2, draw different drillings
The corresponding informance of depth " depth-moment of torsion-the pressure of the drill ", and draw " depth-moment of torsion " curve 13 and " depth in real time by display screen 12
Degree-the pressure of the drill " curve 14, the variation characteristic of different depth coal mass strength is drawn by the mutation analysis of moment of torsion and the pressure of the drill, is realized
The pre-test of coal mass strength distribution characteristics in drilling process；In formula：V is spread speed, and a is the length of the bit, and b is the exposed segment length of drilling rod
Degree；
E. the construction of drilling 2 finishes backed off after random drill bit 4, removes test shorting member 6, to recording and storing in shorting member 6
Time, moment of torsion and the pressure of the drill information analyzed again, contrast real-time detection obtained by " depth-moment of torsion " curve 13 and " depth-brill
Pressure " curve 14, comprehensive analysis draws coal mass strength distribution characteristics at different depth, so as to realize the company of coal mass strength distribution characteristics
Continuous detection.
Embodiment 1, for the one near horizontal projecting coal bed of certain projecting mine, such as Fig. 1（a）It is shown, carrying out headwork
During 1 outburst prediction of face, in the men working advanced prediction of Driving Face in Coal Tunnel 1 drilling 2, incline by protrusion-dispelling regulation closely horizontal, slow
Oblique working face of coal seam should be at least 3 drillings of construction in front of coal body, and bore diameter 42mm, hole depth H are 8 ~ 10m, carry out drilling cuttings
The test of gasresolution index and coal powder quantity of bore；Drilling 2 is arranged in the soft layering of coal body 3 as far as possible, a drilling such as Fig. 1（a）
Middle 1# hole positions are in the middle part of the digging laneway section, and parallel to tunneling direction, other 2 drillings such as Fig. 1（a）Middle 2#, 3# hole, 2#,
The whole hole point in 3# holes should be located at the outer 2 ~ 4m of drift section both sides contour line, be designated as vertical height d.
Start rig 7, start the drilling 2 to the construction of coal seam 3 advanced prediction, during drilling, respectively to coal powder quantity of bore
Tested with drilling cuttings gasresolution index；The test shorting member 6 between drill bit 4 and drilling rod 5 starts in drilling process simultaneously
Work, by testing 6 detectable drilling depth of shorting member, as shown in Fig. 2 as drill bit 4 is ceaselessly crept into, drill bit 4 is boring
Machine 7 enters to be fed constantly to impact in the presence of power, peels off coal body 3, sends impact endurance test shock signal, impact endurance test shock signal from drill bit 4 to
The exposed extreme direction 16 of drilling rod is propagated, and during by testing shorting member 6, test shorting member 6 can detect this impact endurance test shock letter
Number and do and once record, be designated as time signal t1, impact endurance test shock signal reflects after propagating to the end of drilling rod 5, along drilling rod 5 to
Drill bit direction 17 returns, and by being detected again during test shorting member 6, is designated as time signal t2, it is fixed to test shorting member 6
The time signal t that Shi Zidong record storages detect twice1And t2, while drill bit 4 runs into the moment of torsion of drill bit 4 after the coal body 3 of varying strength
It can occur to change accordingly with the pressure of the drill, this shorting member 6 can detect and store in real time torque-on-bit, the pressure of the drill signal, test short circuit
The time electric signal t that element will detect simultaneously1And t2, torque signal and the pressure of the drill signal be converted to vibration signal or turn information
Change electromagnetic signal into transmit to signal receiver 9 along drilling rod 5, the direction of propagation 15 of vibration or electromagnetic signal, as shown in Figure 3；Letter
Number reception signal of receiver 9, and signal processor 11 is transferred information to by wire 10, signal processor 9 is according to reception
Time electric signal t1And t2Show that impact endurance test shock signal completes Once dissemination and reflection required time t=t along drilling rod 51-t2, due to
Known spread speed v, then the length l=vt/2 of drilling rod 5, and the length of drill bit 4 is a, 5 exposed segment length of drilling rod is b, as shown in Fig. 2
Drilling depth h=l+a-b can be then calculated, draws at different drilling depths the corresponding informance of " depth-moment of torsion-the pressure of the drill ", and aobvious
" depth-moment of torsion " curve 13 and " depth-the pressure of the drill " curve 14 are drawn in display screen 12 in real time, is obtained by the mutation analysis of moment of torsion and the pressure of the drill
Go out the variation characteristic of coal mass strength at different depth, realize the pre-test of the coal mass strength distribution characteristics in drilling process；Drilling 2
Construction finishes backed off after random drill bit 4, takes out test shorting member 6, to time, moment of torsion and the brill for recording and storing in shorting member 6
Pressure information is analyzed again, contrasts " depth-moment of torsion " curve 13 and " depth-the pressure of the drill " curve 14 obtained by real-time detection, comprehensive
Analysis draws coal mass strength distribution characteristics at the front different depth of driving face 1, that is, realizes coal mass strength distribution characteristics
Continuous probe.Three coal mass strength, coal powder quantity of bore and drilling cuttings gasresolution indexs can accurately reflect the front coal of driving face 1
Body intensity distribution, stress distribution and gas bearing capacity situation, Comprehensive Comparison investigation is carried out to these three indexs, you can realize
Scientific forecasting to the outburst hazard of 3 Driving Face in Coal Tunnel of coal seam 1.
Claims (3)
- A kind of 1. coal mass strength distribution characteristics continuous probe method, it is characterised in that comprise the following steps：A. rig is started（7）To coal seam construction drill（2）While, it is installed in drill bit（4）With drilling rod（5）Between test short circuit member Part（6）Started working in drilling process；B. drill bit（4）In rig（7）Constantly impacted in the presence of feed power, peel off coal body（3）, and impact endurance test shock signal is sent, Impact endurance test shock signal is by drill bit（4）To the exposed extreme direction of drilling rod（16）Propagate, impact endurance test shock signal is by test shorting member（6） When, by test shorting member（6）Detect and do and once record, be designated as time signal t1, impact endurance test shock signal propagates to drilling rod （5）Reflected behind end, along drilling rod（5）To drill bit direction（17）Passback, then by test shorting member（6）Shi Zaici is detected To and the record that tries again, be designated as time signal t2；C. drill bit（4）Run into the coal body of varying strength（3）Afterwards, drill bit（4）Moment of torsion and the pressure of the drill can occur to change accordingly, pass through survey Try shorting member（6）Torque-on-bit and the pressure of the drill signal can be detected and stored in real time, tests shorting member（6）It will detect simultaneously The time electric signal t of impact endurance test shock1And t2, torque signal and the pressure of the drill signal be converted to vibration signal or convert the information into electromagnetism Signal is along drilling rod（5）Transmit to signal receiver（9）；D. signal receiver（9）Reception signal simultaneously passes through wire（10）Or wirelessly communicate information to signal processor （11）, signal receiver（9）According to the time electric signal t of reception1And t2Draw impact endurance test shock signal along drilling rod（5）Complete once T=t the time required to propagating with reflection1-t2, then can calculate drilling depth h=l+a-b according to run of steel l=vt/2, draw not With the corresponding informance of " depth-moment of torsion-the pressure of the drill " at drilling depth, and pass through display screen（12）" depth-moment of torsion " song is drawn in real time Line（13）" depth-the pressure of the drill " curve（14）, the change of different depth coal mass strength is drawn by the mutation analysis of moment of torsion and the pressure of the drill Change feature, realize the pre-test of the coal mass strength distribution characteristics in drilling process；In formula：V is spread speed, and a is the length of the bit, b For the exposed segment length of drilling rod；E. drill（2）Construction finishes backed off after random drill bit（4）, remove test shorting member（6）, to shorting member（6）It is middle record and Time, moment of torsion and the pressure of the drill information of storage are analyzed again, contrast " depth-moment of torsion " curve obtained by real-time detection（13）With " depth-the pressure of the drill " curve（14）, comprehensive analysis draws coal mass strength distribution characteristics at different depth, so as to realize coal mass strength point The continuous probe of cloth feature.
- 2. coal mass strength distribution characteristics continuous probe method according to claim 1, it is characterised in that：It is described to be applied to coal seam The drilling of work（2）Drilled near horizontal, gently inclined seam work towards at least constructing 3 in front of coal body.
- 3. a kind of coal mass strength distribution characteristics continuous detectiion equipment for realizing claim 1 methods described, including drill bit（4）, bore Bar（5）, rig（7）, water just（8）, it is characterised in that：In the drill bit（4）With drilling rod（5）Between be connected with one test short circuit Element（6）, in the drilling rod（5）With water just（8）Between be connected with a signal receiver（9）, signal receiver（9）Through wire （10）It is connected with signal processor（11）；Described test shorting member（6）Diameter and drilling rod（5）It is identical, with drill bit（4）And brill Bar（5）Threadably connect, test shorting member（6）Including be built-in with the strain gauge transducer of measurable moment of torsion and the pressure of the drill with And detectable and record impact shock signal micro-vibration sensor.
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| CN109406307A (en) * | 2018-12-10 | 2019-03-01 | 中国矿业大学(北京) | For studying the experiment loading system and method for rock fragmentation mechanisms under mine |
| CN110778363B (en) * | 2019-11-06 | 2023-05-05 | 山东科技大学 | Multi-parameter measurement while drilling method for determining peak area of coal body stress and early warning |
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