CN104597130B - Method for detecting and analyzing evolution process of structure of surrounding rock in area of deep tunnel of coal mine - Google Patents
Method for detecting and analyzing evolution process of structure of surrounding rock in area of deep tunnel of coal mine Download PDFInfo
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- CN104597130B CN104597130B CN201510059350.XA CN201510059350A CN104597130B CN 104597130 B CN104597130 B CN 104597130B CN 201510059350 A CN201510059350 A CN 201510059350A CN 104597130 B CN104597130 B CN 104597130B
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- 239000011435 rock Substances 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title abstract description 15
- 239000003245 coal Substances 0.000 title abstract description 7
- 230000008569 process Effects 0.000 title abstract description 4
- 238000012360 testing method Methods 0.000 claims abstract description 21
- 239000000523 sample Substances 0.000 claims abstract description 15
- 238000005553 drilling Methods 0.000 claims description 120
- 238000001514 detection method Methods 0.000 claims description 18
- 238000004458 analytical method Methods 0.000 claims description 13
- 230000010429 evolutionary process Effects 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 5
- 238000007619 statistical method Methods 0.000 claims description 4
- 239000007943 implant Substances 0.000 claims description 3
- 238000013102 re-test Methods 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 abstract 1
- 238000002604 ultrasonography Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000012098 association analyses Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003696 structure analysis method Methods 0.000 description 1
Abstract
The invention discloses a method for detecting and analyzing the evolution process of the structure of surrounding rock in the area of a deep tunnel of a coal mine. The method comprises the following steps: (1) distributing testing drill holes in a to-be-detected area of the surrounding rock of the deep tunnel of the coal mine, and installing and propelling digital drill hole picture taking probes in the drill holes in sequence to obtain the principle on evolution of the propagation characteristic of sound waves along with time in the drill holes of the surrounding rock, wherein the drill holes are arranged in parallel, and have the same depth as the to-be-detected area of the surrounding rock; (2) obtaining the spacial distribution of the volumetric joint count (Jv) of the surrounding rock in the area of the deep tunnel according to single hole structure surface information; (3) obtaining the spacial distribution of the integrity index (Kv) of the surrounding rock in the area of the deep tunnel and the evolution principle of the surrounding rock by taking the propagation of sound waves of adjacent drill holes in the area of the deep tunnel as a boundary condition; and (4) comparing the integrity index, the volumetric joint count (Jv), with the integrity index (Kv) of the surrounding rock comprehensively to obtain the evolution process of the structure of the surrounding rock in the area of the deep tunnel of the coal mine. The method disclosed by the invention is practical, is easy and convenient to operate and is used for obtaining the integrity and evolution principle of the structure of the surrounding rock before and after excavating the tunnel of the coal mine so as to provide scientific basis for the stable control and security evaluation of the surrounding rock of the deep tunnel of the coal mine.
Description
Technical field
The invention belongs to rock mass structure detection analysis technical field, is applied to colliery deep tunnel area more particularly to a kind of
The detection analysis method of domain surrounding rock structure evolutionary process.
Background technology
Affected by geological environment and the activity of mankind's excavation, colliery deep laneway surrounding rock has substantial amounts of structural plane.This
A little structural planes are often the relatively weak position of coffer mechanics intensity, and it causes the discontinuity of coffer mechanics property, heterogeneity
Property and anisotropy, its spatial distribution and combined situation have vital shadow to the dielectric attribute and mechanical attribute of country rock
Ring.Therefore, detection analysis surrounding rock structure grasp its evolutionary process colliery deep laneway surrounding rock stability contorting and safety are commented
Estimate and have great importance.
At present, the Main Means of surrounding rock structure detection are still drilling core algoscopy, and it is simple, convenient, directly perceived, practical.
But, due to high-ground stress and the weak broken feature of colliery deep wall rock, core is taken extremely difficult, causes drilling core to be surveyed
The method of determining is difficult to reflect the development characteristics of structural plane.And the digital panoramic shooting system in hole structure face, borehole camera can be passed through
The image information of bore inner is obtained, high-resolution 360 ° of hole wall expanded views and three-dimensional block diagram is given, and then is obtained drilling
The information such as the occurrence of structural plane, mark length, gap width and implant.However, being restricted by objective condition, testing bore holes are difficult to covering and enclose
The Zone Full of rock, the information obtained by one borehole shooting can only often reflect the architectural feature of local country rock, it is difficult to anti-
Reflect the provincial characteristicss of surrounding rock structure.In addition, the surrounding rock structure after roadway excavation is in fact dynamic change, and only by drilling
Image capture method is difficult to grasp this change procedure.Therefore, need a kind of new detection analysis method badly to obtain colliery deep tunnel
The structure evolution process of region country rock, and this method domestic and foreign literature there is not been reported.
The content of the invention
Present invention aims to colliery deep laneway surrounding rock stable control, there is provided a kind of region surrounding rock structure
The detection analysis method of evolutionary process, it is easy to implement the method, it is easy to operate, obtain roadway excavation before and after surrounding rock structure integrity and its
Evolution, so as to being that colliery deep laneway surrounding rock stability contorting and safety evaluatio provide scientific basis.
In order to realize above-mentioned purpose, the present invention adopts following technical measures：
A kind of detection analysis method suitable for colliery deep tunnel region surrounding rock structure, its step is：
(1) excavated in roadway surrounding rock region to be measured in colliery deep and arranged testing bore holes（5,9,13, according to
Regional extent and certainty of measurement determine）, drill, mutually put down between drilling
OK, hole depth is consistent with regional depth.For each drilling, installed in hole successively and push digital borehole camera probe
（BHCTV）, gather borehole image information.Afterwards, adjacent drilling combination of two, installs ultrasound probe header（SR-RCT（B））,
Carry out across hole ultrasonic testing, and by the retest in different time, obtain the propagation characteristic of sound wave country rock between hole with
The Evolution of time.
(2) according to single hole arrangements surface information, across hole association analysiss are carried out, judges the similarity in adjacent hole structure face, prolong
Hole structure face is stretched or connects, the structure region feature of country rock between acquisition pores.Further, by enclosing between all drilled hole and hole in region
The statistical analysiss of rock structural surface information, obtain the spatial distribution characteristic of the country rock volume joint number Jv of region surrounding rock structure.
(3) by the use of the sonic propagation feature of adjacent drilling in region as boundary condition, inverting sound wave is enclosed in whole region
Propagation characteristic in rock, and then the Perfection Index of analyzed area country rock, obtain the space point of region rock integrity index Kv
Cloth feature and its Evolution with the time.
(4) Comprehensive Correlation rock integrity index country rock volume joint number Jv and region rock integrity index Kv, with area
Initial condition of the volume joint number Jv of domain surrounding rock structure as rock integrity, the evolution rule of region rock integrity index Kv
The dynamic condition as rock integrity is restrained, the evolutionary process of region surrounding rock structure integrity is obtained.
As a result of above technical measures, the detection analysis method of colliery deep tunnel region surrounding rock structure of the present invention
Good effect and advantage are：
1. single hole arrangements surface information is based on, the structural surface information of country rock between across hole association analysiss acquisition pores, Jin Ertong is carried out
The statistical nature that statistical analysiss obtain region wall rock structure face is crossed, it is achieved thereby that surrounding rock structure detection is detected to region from hole
The breakthrough of detection；
2. the retest in different time is carried out using across hole supercritical ultrasonics technology, obtains drilling for tunnel region rock integrity
Law, it is achieved thereby that breakthrough of the surrounding rock structure detection from static instrumentation to dynamic instrumentation；
3. arrange as a result of porous and the assembled scheme that drills, improve efficiency and the structural plane letter of surrounding rock structure detection
It is comprehensive that breath is extracted；
4. structural surface information is mutually authenticated and relative analyses using two kinds of different measuring technologies, is improve country rock knot
The accuracy of structure result of detection and reliability；
5. the method cannot be only used for excavating the structure detection of roadway surrounding rock, it can also be used to closes on and does not excavate roadway surrounding rock
The forward probe of structure.
6. the method can improve surrounding rock structure investigative range up to more than 30 times.
Description of the drawings
Fig. 1 is a kind of tunnel region Host Medium Selection schematic diagram.
Fig. 2 is that a kind of tunnel region wall rock drill-hole arranges schematic diagram.
Fig. 3 is a kind of drilling arrangement schematic diagram of tunnel region country rock five.
Fig. 4 is borehole camera schematic diagram.
Fig. 5 is across hole ultrasonic testing schematic diagram.
Fig. 6 is the tunnel test zone that determines and borehole pattern in embodiment.
Fig. 7 is the borehole image that obtains in embodiment.
Fig. 8 be in embodiment the velocity of wave that obtains with hole depth change curve.
Fig. 9 be embodiment in analyze acquisition wall rock structure face spatial distribution map.
Figure 10 is to analyze the region rock integrity isogram of acquisition in embodiment.
Figure 11 changes over figure for the region rock integrity contour for analyzing acquisition in embodiment.
Figure 12 is region rock integrity isogram before and after slip casting in embodiment.
Excavate tunnel 1-1, do not excavate tunnel 1-2, first area country rock 2-1, second area country rock 2-2, the 3rd region
Country rock 2-3, the first drilling 3-1, the second drilling 3-2, the 3rd drilling 3-3, the 4th drilling 3-4, the 5th drilling 3-5, the 6th drilling
3-6, the 7th drilling 3-7, the 8th drilling 3-8, the 9th drilling 3-9, the tenth drilling 3-10, the 11st drilling 3-11, the 12nd are bored
Hole 3-12, the 13rd drilling 3-13, digital borehole camera probe 4（BHCTV）, across hole ultrasound probe header 5-1（SR-RCT
（B））, across hole ultrasound probe header 5-2（SR-RCT（B））.
Specific embodiment
Embodiment 1：
The present invention is further detailed explanation below in conjunction with the accompanying drawings.
According to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, a kind of detection suitable for colliery deep tunnel region surrounding rock structure
Analysis method, its step is：
A, according to engineering demand, select region to be measured tunnel 1-1 peripheries are being excavated, regional depth is 3 ~ 7 Bei Dong footpaths, should
Region can be positioned at first area country rock 2-1, the second area country rock 2-2 of roadway's sides and positioned at the 3rd of roadway floor the
Region country rock 2-3.For the forward probe that do not excavate roadway surrounding rock structure is closed on, tunnel 1-2 is not excavated such as, lane can be excavated
It is test zone that road 1-1 peripheries select second area country rock 2-2.
At region bed boundaries to be measured and center is respectively arranged testing bore holes, it is 5 that drilling is minimum, i.e., the first drilling
3-1, the second drilling 3-2, the 3rd drilling 3-3, the 4th drilling 3-4, the 5th drilling 3-5, if regional extent to be measured is larger, can enter one
The 6th drilling 3-6 of step arrangement, the 7th drilling 3-7, the 8th drilling 3-8, the 9th drilling 3-9, if regional extent to be measured is larger and right
Certainty of measurement require it is higher, further can arrange the tenth drilling 3-10, the 11st drilling 3-11, the 12nd drilling 3-12, the tenth
Three drilling 3-13, borehole axial are mutually perpendicular to the region scope of freedom, and angle can be readjusted by a small margin according to live physical condition, but
Less than ± 5 °.All drillings are parallel to each other, and hole depth is consistent with regional depth.
As a example by testing the five hole arrangements of second area country rock 2-2, first drill 3-1, the second drilling 3-2, the
Three drilling 3-3, the 4th drilling 3-4, the 5th drilling 3-5 install digital borehole camera probe 4 successively, gradually push away along hole depth direction
Enter, obtain the image information of whole drilling.After the test is completed, in all drillings, bore including the first drilling 3-1, second
Hole 3-2, the 3rd drilling 3-3, the 4th drilling 3-4, the 5th drilling 3-5 install sleeve pipe, in adjacent drilling（Comprising 8 groups, respectively
One drilling 3-1 and the second drilling 3-2 combinations, the second drilling 3-2 and the 3rd drilling 3-3 combinations, the 3rd drilling 3-3 and the 4th drilling
3-4 combinations, the 4th drilling 3-4 and the first drilling 3-1 combinations, the first drilling 3-1 and the 5th drilling 3-5 combinations, the second drilling 3-2
With the 5th drilling 3-5 combination, the 3rd drilling 3-3 and the 5th drilling 3-5 combination, the 4th drilling 3-4 and the 5th drilling 3-5 combination,）
Interior embedded across hole ultrasound probe header 5-1, across hole ultrasound probe header 5-2, are synchronously slowly advanced, and acquisition sound wave is between hole
The propagation characteristic of country rock.Repeat the test in different time, obtain not in the same time sound wave first drill 3-1, the
Propagation characteristic between two drilling 3-2, the 3rd drilling 3-3, the 4th drilling 3-4, the 5th drilling 3-5.
B, analysis borehole image information, obtain the first drilling 3-1, the second drilling 3-2, the 3rd drilling 3-3, the 4th drilling
3-4, the occurrence of the 5th drilling 3-5 structural planes, mark length, gap width and charges information, the occurrence of the adjacent drilling of comparison, mark length, gap
Wide similarity degree, and judge whether a certain structural plane of adjacent drilling is similar with reference to implant informix.If similar, extend
Or connection hole structure face, structural surface information between acquisition pores.Further, by structural surface information between all drilled hole and hole in region
Statistical analysiss, obtain tunnel region surrounding rock structure country rock volume joint number Jv spatial distribution characteristic.
C, the velocity of wave propagated between hole according to sound wave in different time and its decay characteristics, the region of country rock between acquisition pores
Rock integrity index Kv rules over time；Using the Perfection Index Kv of country rock between hole as boundary condition, inverting point
The spatial distribution characteristic and its Evolution with the time of analysis region rock integrity index Kv.
D, Comprehensive Correlation rock integrity index country rock volume joint number Jv and region rock integrity index Kv, will be logical
The initial condition of the country rock volume joint number Jv as rock integrity of the region country rock that borehole camera is obtained is crossed, will across hole ultrasound
The dynamic condition that the evolution Feature of the region rock integrity index Kv that ripple test is obtained develops as rock integrity, obtains coal
Ore deposit deep tunnel region surrounding rock structure evolutionary process.
Embodiment 2：
This example is detected to certain colliery deep tunnel region surrounding rock structure that buried depth is -850m.Test zone and
Drilling arrangement is as shown in fig. 6, it is 4.50 × 3.45m that the hole footpath of tunnel 1-1 has been excavated in test.Concrete grammar and step are as follows：
A, selection have excavated the second area 2-2 of tunnel 1-1 as region to be measured, and area size is 2 × 1 × 25m（Wide ×
It is high × deep）, region lower limb is positioned at 0.5m above base plate.Due to selecting search coverage less, so at zone boundary and center
Five drillings of place's arrangement, the respectively first drilling 3-1, the second drilling 3-2, the 3rd drilling 3-3, the 4th drilling 3-4, the 5th drilling
3-5, boring aperture 130mm, downward-sloping 2 °, hole depth 25m.First drill 3-1, the second drilling 3-2, the 3rd drilling 3-3, the
Installed in four drilling 3-4, the 5th drilling 3-5 successively and push digital borehole camera probe 4, gather borehole image information, such as Fig. 7 institutes
Show.Afterwards, in the first drilling 3-1, the second drilling 3-2, the 3rd drilling 3-3, the 4th drilling 3-4, the 5th drill 3-5, installation is used
In the steel thimble across hole ultrasonic testing to foot of hole, steel thimble sealed bottom, then slip casting cause steel thimble to enclose with drilling
Space filling between rock is closely knit.In adjacent drilling（Comprising 8 groups, the respectively first drilling 3-1 and the second drilling 3-2 combinations, the
Two drilling 3-2 and the 3rd drilling 3-3 combinations, the 3rd drilling 3-3 and the 4th drilling 3-4 combinations, the 4th drilling 3-4 and the first drilling
3-1 combinations, the first drilling 3-1 and the 5th drilling 3-5 combinations, the second drilling 3-2 and the 5th drilling 3-5 combinations, the 3rd drilling 3-3
With the 5th drilling 3-5 combination, the 4th drilling 3-4 and the 5th drilling 3-5 combination,）Interior embedded across hole ultrasound probe header 5-1,
Across hole ultrasound probe header 5-2, is synchronously slowly advanced, and obtains the spread speed and decay characteristics of sound wave country rock between hole, such as
Shown in Fig. 8.
B, the 3-1 that drills based on first, the second drilling 3-2, the 3rd drilling 3-3, the 4th drilling 3-4, the 5th drilling 3-5 structures
Surface information, carries out across hole association analysiss, obtains the spatial distribution characteristic of the country rock volume joint number Jv of tunnel region surrounding rock structure,
As shown in Figure 9.Based on across hole ultrasound test result, roadway surrounding rock Perfection Index spatial distribution characteristic is obtained and its with the time
Evolution it is as shown in Figure 10.
The evolution Feature of C, the country rock volume joint number Jv based on region country rock and region rock integrity index Kv, obtains
Colliery deep tunnel region surrounding rock structure evolutionary process is as shown in figure 11.
According to region surrounding rock structure detection analysis result, after finding roadway excavation, near field rock integrity is more poor, and by
Walk to depths and extend, rock integrity develops and is not introduced into steady statue.Meanwhile, surface displacement monitoring result also show phase
Same result.Therefore be secondary to test section to have carried out reinforcing Shallow hole grouting+deep hole grouting+high-strength prestressed anchor cable+multiple spray-up
Supporting.Afterwards, test result shows, rock integrity improves 15% ~ 30%（As shown in figure 12）, rock integrity evolution is progressively
Enter steady statue.
Claims (1)
1. a kind of detection analysis method suitable for colliery deep tunnel region surrounding rock structure, its step is：
(1) testing bore holes are arranged in colliery deep laneway surrounding rock region to be measured, drilling is respectively positioned at zone boundary to be measured and area
Domain center, it is 5 that drilling is minimum, and borehole axial is mutually perpendicular to the region scope of freedom, and angle can be entered according to live physical condition
Row fine tune, but ± 5 ° are less than, it is parallel to each other between drilling, hole depth is consistent with regional depth, for each drilling, in hole
Inside install successively and push digital borehole camera probe, gather borehole image information, afterwards, adjacent drilling combination of two installs super
Sonic test is popped one's head in, and carries out across hole ultrasonic testing, by the retest in different time, obtains sound wave country rock between hole
Evolution of the propagation characteristic with the time；
(2) borehole image information is analyzed, obtains occurrence, mark length, gap width and the charges information of structural plane, the adjacent drilling of comparison
The wide similarity degree of occurrence, mark length, gap, and judge whether a certain structural plane of adjacent drilling is similar with reference to implant informix,
If similar, extend or connect hole structure face, surrounding rock structure surface information between acquisition pores, by all drilled hole in region and hole
Between surrounding rock structure surface information statistical analysiss, the spatial distribution for obtaining the country rock volume joint number Jv of tunnel region surrounding rock structure is special
Levy；
(3) boundary condition is characterized as using the sonic propagation of adjacent drilling in region, inverting sound wave is in whole region country rock
Propagation characteristic, the Perfection Index of analyzed area country rock, obtain region rock integrity index Kv spatial distribution characteristic and with
The Evolution of time；
(4) Comprehensive Correlation rock integrity index country rock volume joint number Jv and region rock integrity index Kv, is enclosed with region
Initial condition of the volume joint number Jv of rock structure as rock integrity, the Evolution of region rock integrity index Kv is
The dynamic condition of rock integrity, obtains the evolutionary process of region surrounding rock structure integrity.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105759010B (en) * | 2016-02-04 | 2017-11-07 | 山东大学 | A kind of dynamic monitoring of mining influence tunnel and Stability Assessment method |
| CN111999781A (en) * | 2020-09-14 | 2020-11-27 | 山东科技大学 | Deep well roadway omnibearing surrounding rock structure dynamic measurement analysis method |
| CN116299708A (en) * | 2023-02-02 | 2023-06-23 | 西南交通大学 | Visualization method and related equipment for tunnel surrounding rock loose ring evolution process |
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| JP2010266347A (en) * | 2009-05-15 | 2010-11-25 | Japan Atomic Energy Agency | Geological structure survey system and method therefor |
| CN101914912A (en) * | 2010-08-09 | 2010-12-15 | 中国科学院武汉岩土力学研究所 | In-situ testing method for deep underground engineering during rockburst preparation and evolution process |
| CN102996149A (en) * | 2012-11-21 | 2013-03-27 | 山东科技大学 | Support method for bolt-grouting composite crushing dynamic-pressure roadway soft rock roof by high-pre-stressed anchor cable |
| CN103017822A (en) * | 2012-11-29 | 2013-04-03 | 长江水利委员会长江科学院 | Surrounding rock deformation fracture evolution test method and structure for underground powerhouse in high ground stress region |
| CN103487797A (en) * | 2013-09-29 | 2014-01-01 | 中国科学院武汉岩土力学研究所 | In-situ test method for surrounding rock relaxation depth in columnar jointing rock mass cavity project |
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| KR101064655B1 (en) * | 2011-05-25 | 2011-09-15 | 한국지질자원연구원 | Excitation device and downhole seismic test method using it |
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Patent Citations (5)
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|---|---|---|---|---|
| JP2010266347A (en) * | 2009-05-15 | 2010-11-25 | Japan Atomic Energy Agency | Geological structure survey system and method therefor |
| CN101914912A (en) * | 2010-08-09 | 2010-12-15 | 中国科学院武汉岩土力学研究所 | In-situ testing method for deep underground engineering during rockburst preparation and evolution process |
| CN102996149A (en) * | 2012-11-21 | 2013-03-27 | 山东科技大学 | Support method for bolt-grouting composite crushing dynamic-pressure roadway soft rock roof by high-pre-stressed anchor cable |
| CN103017822A (en) * | 2012-11-29 | 2013-04-03 | 长江水利委员会长江科学院 | Surrounding rock deformation fracture evolution test method and structure for underground powerhouse in high ground stress region |
| CN103487797A (en) * | 2013-09-29 | 2014-01-01 | 中国科学院武汉岩土力学研究所 | In-situ test method for surrounding rock relaxation depth in columnar jointing rock mass cavity project |
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