CN110107308A - It is a kind of generation in tunnel TBM cutterhead the grade of rock burst determine method - Google Patents
It is a kind of generation in tunnel TBM cutterhead the grade of rock burst determine method Download PDFInfo
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- CN110107308A CN110107308A CN201910363776.2A CN201910363776A CN110107308A CN 110107308 A CN110107308 A CN 110107308A CN 201910363776 A CN201910363776 A CN 201910363776A CN 110107308 A CN110107308 A CN 110107308A
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- rock burst
- grade
- microseism
- cutterhead
- tbm
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- 239000011435 rock Substances 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 239000006185 dispersion Substances 0.000 claims abstract description 15
- 238000010276 construction Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000029052 metamorphosis Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/11—Making by using boring or cutting machines with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a kind of generation grades of rock burst in tunnel TBM cutterhead to determine method, the microseism parameter of the different brackets rock burst outside TBM cutterhead occurs by micro seismic monitoring analysis, calculate the average value and coefficient of dispersion of microseism energy, apparent volume and earthquake magnitude, and carry out the coefficient of dispersion summation of the microseism energy, apparent volume and earthquake magnitude of different brackets rock burst, the microseism index that the minimum corresponding microseism parameter of the sum of coefficient of dispersion is determined as rock burst grade in TBM cutterhead, the average value of the microseism index is as the grade scale of rock burst grade when different brackets rock burst is occurred.The difference of the microseism index and different brackets rock burst grade scale when rock burst occurs in TBM cutterhead is calculated, the minimum corresponding rock burst grade of difference is the grade of the rock burst.Keep the determination of rock burst grade in TBM cutterhead feasible and more objective and accurate timely.The present invention can be used for the analysis of tunnel engineering rock-burst monitoring and administer.
Description
Technical field
The present invention relates to geotechnical engineering fields, and it is true to be more particularly to a kind of generation grade of rock burst in tunnel TBM cutterhead
Determine method.
Background technique
During the development and utilization of the underground space, rapid construction is preferentially carried out using TBM and has become total development trend.
Different from conventional drilling and blasting method, electronics, information, telemetering, the contour science and technology of remote control are widely used to whole operations progress in TBM driving
Guidance and monitoring, driving speed are about 4~10 times of conventional drilling and blasting method, be widely used to various countries' energy, traffic, urban construction,
The departments such as national defence underground engineering construction.In some developed countries, many construction enterprises are all clearly stipulate that tunnel for 3km or more
Hole, it is necessary to be excavated using TBM.With the high speed development and nation-building demand of national economy, the spy of TBM construction tunnel great burying
Point is more and more significant, and the geological environment of rock mass institute preservation is increasingly complex, and crustal stress is higher, and the rock burst hazard for excavating induction becomes more
Add protrusion.Rock burst is underground chamber under excavation or other external disturbances, and the flexible deformation potential energy accumulated in rock mass is violent suddenly
Strong release, cause rock burst and or the phenomenon that eject, be a kind of power type disaster of complexity, seriously endanger and applies safely
Work.Rock burst grade is the index for describing rock burst intensity and destroying scale, is to choose reasonable rock burst prevention method, correctly formulate
The basis and premise of rock-burst prevention strategy and design of its support.Rock burst grade is typically divided into strong rock burst on active, strong rock burst, middle isolith
Quick-fried and slight rock burst is generally determined by quick-fried pit-size, sillar ejection, sound size etc. caused by when rock burst generation.
TBM passes through rotary head and promotes, and makes hobboing cutter attrition crushing rock.The diameter and tunnel cross-section basic one of cutterhead
It causes, and cutterhead has certain thickness.It is adjoint when can be by measuring quick-fried pit-size, rock burst when rock burst occurs outside TBM cutterhead
Sound, observation sillar ejection phenomena such as accurately determine rock burst grade.But when rock burst occurs in TBM cutterhead, due to cutterhead
Presence, can not carry out quick-fried pit-size measurement or observation sillar ejection phenomena such as.Operating personnel is difficult to 24 hours nearby simultaneously
The acoustic information that moment occurs for rock burst is recorded, and the judgement of acoustic information is heavier by artificial subjective impact, therefore, when rock burst is sent out
It is difficult to accurately determine its grade when life is in TBM cutterhead.
Summary of the invention
The object of the invention is to the grades in order to solve the problems, such as rock burst in TBM cutterhead to be difficult to accurately determine, provide one
Kind occurs the grade of rock burst in tunnel TBM cutterhead and determines method.
To achieve the above object, the grade determination side of a kind of generation proposed by the invention rock burst in tunnel TBM cutterhead
Method is characterized in that, comprising the following steps:
Carry out micro seismic monitoring in TBM tunnel, the rock of all varying strengths outside TBM cutterhead and in cutterhead occurs for monitoring
Quick-fried adjoint microseismic signals；
It is determined and is occurred in TBM knife by phenomena such as quick-fried pit-size of measurement rock burst, the sillar ejection or sound size that observe
The grade of all varying strength rock bursts outside disk；
By the way that the adjoint microseismic signals of all rock bursts are analyzed outside TBM cutterhead to generation, the micro- of each rock burst is determined
Shake energy, apparent volume and earthquake magnitude three classes microseism parameter；
Calculate separately the microseism energy, apparent volume of all different brackets rock burst releases and putting down for earthquake magnitude outside above-mentioned TBM cutterhead
Mean value and coefficient of dispersion；
Further, respectively by different brackets rock burst events all outside above-mentioned TBM cutterhead release microseism energy, apparent volume and
The coefficient of dispersion of earthquake magnitude is summed；
The coefficient of dispersion of microseism energy, apparent volume and earthquake magnitude after more above-mentioned summation selects coefficient of dispersion minimum corresponding
Microseism parameter, using the microseism parameter as occur in TBM cutterhead rock burst grade determine microseism index；
The average value of the microseism index is as generation in TBM cutterhead when different brackets rock burst outside above-mentioned TBM cutterhead is occurred
The grade scale of interior rock burst grade；
The size of microseism index when determining that rock burst occurs in TBM cutterhead by micro seismic monitoring, calculate its from it is different etc.
The difference of grade rock burst grade scale, the minimum corresponding rock burst grade of difference are the grade of generation rock burst in TBM cutterhead.
Further, the monitoring microseismic signals carry out one by arranging microseismic sensors in buried TBM tunnel
Obtained by month micro seismic monitoring.
Compared with prior art, the present invention having the advantage that
1, microseism parameter when being occurred by rock burst assert rock burst grade, and when being occurred using different brackets rock burst
The average value of microseism parameter carries out rock burst rank as grade scale, rises to quantitatively from qualitative, avoids and pass through tradition
The drawbacks of indexs such as quick-fried hole depth, ejection, sound determine rock burst grade in TBM cutterhead, makes the determination of rock burst grade in TBM cutterhead
It is feasible and more objective and accurate.
2, rock burst grade can be determined when the quick-fried hole of rock burst does not disclose in TBM cutterhead, determines rock burst grade more
In time, eliminate wait rock burst exposure just can be carried out grade determine bring time lag influence, while avoid rock burst disclose
Quick-fried hole metamorphosis bring grade determination deviation in the process.
3, the rock burst grade occurred in TBM cutterhead is determined using multiple microseism parameters, selects coefficient of dispersion most
Small most representational microseism parameter keeps rock burst level certification more scientific accurate as evaluation index.
Specific embodiment
The present invention is described in further detail combined with specific embodiments below:
Microseismic sensors are arranged in a buried TBM tunnel, carry out a month micro seismic monitoring.It monitors to occur altogether in TBM
Cutterhead is outer and cutterhead in 24 varying strengths rock burst, wherein the rock burst occurred outside TBM cutterhead shares 15；
Its rock is determined by phenomena such as quick-fried pit-size of above-mentioned 15 rock bursts of measurement, the sillar ejection observed, sound size
Quick-fried grade；Through judging, strong rock burst on active, strong rock burst, medium rock burst and slight rock burst are respectively 2,2,5 and 6；
Determine that the microseism energy, apparent volume and earthquake magnitude three classes of above-mentioned 15 different brackets rock bursts release are micro- by micro seismic monitoring
Parameter value is shaken, after arrangement as shown in table 1.
Microseism energy, apparent volume and earthquake magnitude when the outer rock burst of 1 TBM cutterhead of table occurs
Calculate separately the microseism energy of above-mentioned 15 different brackets rock burst event release, the average value of apparent volume and earthquake magnitude and
Coefficient of dispersion.Wherein, the average value of strong rock burst on active, strong rock burst, medium rock burst and slight rock burst microseism energy is respectively
33550000J, 713770J, 22220J and 2076J, coefficient of dispersion are respectively 0.59,0.19,0.70 and 1.00；Strong rock burst on active,
The average value of strong rock burst, medium rock burst and slight rock burst apparent volume is respectively 7389m3、1648m3、249m3And 5.8m3, discrete
Coefficient is respectively 0.35,0.43,0.41 and 1.59；Strong rock burst on active, strong rock burst, medium rock burst and slight rock burst earthquake magnitude are averaged
Value is respectively 1.92,0.90,0.55 and 0.07, and coefficient of dispersion is respectively 0.14,0.47,0.58 and 0.98；
Further, respectively by the discrete system of the microseism energy of above-mentioned different brackets rock burst event release, apparent volume and earthquake magnitude
Number is summed, and the sum of coefficient of dispersion of microseism energy, apparent volume and earthquake magnitude is respectively 2.48,2.77 and 2.17；
The coefficient of dispersion of the coefficient of dispersion of microseism energy, apparent volume and earthquake magnitude after more above-mentioned summation, earthquake magnitude is minimum, because
Different brackets rock burst outside TBM cutterhead occurs using earthquake magnitude as the microseism index that rock burst grade determines in TBM cutterhead occurs for this
When earthquake magnitude grade scale of the average value as rock burst grade in TBM cutterhead, i.e., strong rock burst on active, strong rock burst, medium rock burst and
Its earthquake magnitude is respectively 1.92,0.90,0.55 and 0.07 when slight rock burst occurs；
Monitor that 9 occur the rock burst in TBM cutterhead during micro seismic monitoring altogether, wherein earthquake magnitude when a rock burst occurs
Size is 0.75, by taking the secondary rock burst as an example, determines its grade.Calculate its with strong rock burst on active, strong rock burst, medium rock burst and slight
The difference of earthquake magnitude grade scale is respectively 1.17,0.15,0.20 and 0.68 when rock burst occurs, difference minimum 0.15, in correspondence
It is medium rock burst that the rock burst grade in TBM cutterhead, which occurs, for equal rock bursts, i.e. this time.
Claims (2)
1. a kind of generation grade of rock burst in tunnel TBM cutterhead determines method, which comprises the following steps:
Monitor microseismic signals:
Carry out micro seismic monitoring in TBM tunnel, the rock burst companion of all varying strengths outside TBM cutterhead and in cutterhead occurs for monitoring
With microseismic signals；
Determine rock burst grade scale in cutterhead:
To varying strength rock burst divided ranks all outside TBM cutterhead, and determine microseism energy, apparent volume and the earthquake magnitude of each rock burst
Three classes microseism parameter；Calculate the average value of the microseism energy, apparent volume and earthquake magnitude of all different brackets rock burst releases outside TBM cutterhead
And the sum of coefficient of dispersion, using smallest discrete coefficient and corresponding microseism parameter as rock burst grade grade scale；
Rock burst in cutterhead is classified:
Average value when different brackets rock burst of the corresponding microseism index of the grade scale outside TBM cutterhead is calculated, by micro-
Shake monitoring determines the size of microseism index when rock burst occurs in TBM cutterhead, calculates itself and different brackets rock burst grade scale
Difference, the minimum corresponding rock burst grade of difference is the grade of generation rock burst in TBM cutterhead.
2. generation grade of rock burst in tunnel TBM cutterhead according to claim 1 determines method, it is characterised in that: institute
Monitoring microseismic signals are stated by arranging microseismic sensors in buried TBM tunnel, are carried out obtained by a month micro seismic monitoring.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114169597A (en) * | 2021-11-29 | 2022-03-11 | 中国科学院武汉岩土力学研究所 | Rock burst control measure implementation effect overall process quantitative evaluation method |
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