CN104406681B - A kind of method of testing determining microseism velocity of wave in real time - Google Patents
A kind of method of testing determining microseism velocity of wave in real time Download PDFInfo
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- 238000010998 test method Methods 0.000 title claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 44
- 239000002360 explosive Substances 0.000 claims abstract description 34
- 230000001960 triggered effect Effects 0.000 claims abstract description 21
- 238000005065 mining Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 12
- 239000011435 rock Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000009792 diffusion process Methods 0.000 description 1
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Abstract
A kind of method of testing determining microseism wave-wave speed in real time disclosed by the invention, is applicable to the microseism position monitor of the various Geotechnical Engineerings such as mine, oil and side slope.The human-generated explosives of the microseismic sensors utilizing Microseismic monitoring system to carry and known focus determines microseism wave-wave speed in real time.The volume coordinate of each microseismic sensors of Accurate Determining and human-generated explosives event in the existing space coordinates of Microseismic monitoring system; The microseism ripple that in pickup Microseismic monitoring system, each microseismic sensors monitors then, using first microseismic sensors be triggered then as comparison other, adopt the arrival time difference of other microseismic sensors and first microseismic sensors that is triggered respectively and they are relative to the range difference real time inversion microseism wave-wave speed of human-generated explosives focus.Along with the carrying out of mining operation, the present invention can Obtaining Accurate microseism wave-wave speed in real time, and avoid and again install manpower, the financial resources that microseismic sensors causes and expend, simple to operate, economically feasible.
Description
Technical field
The present invention relates to a kind of method of testing, especially a kind of method of testing determining microseism velocity of wave being in real time applicable to the various Geotechnical Engineerings such as mine, oil and side slope, belongs to microseism position monitor field.
Background technology
On Microseismic Monitoring Technique refers to a kind of geophysics real time monitoring utilizing the microseismic signals produced in rock masses fracturing process to study and evaluate rock stability in Geotechnical Engineering.This technology is used to study the Rockburst Problem in hard rock mine the earliest, and in recent years, On Microseismic Monitoring Technique is widely applied in all kinds of Geotechnical Engineering.Microseism seismic source location is the core of On Microseismic Monitoring Technique, and it utilizes microseism waveform signal, the then data of microseismic sensors record and the volume coordinate of microseism ripple Velocity Inversion microseismic event and the origin time of earthquake.Microseism wave-wave speed is most important for raising seismic source location precision and stability accurately, is also more difficult exactly determined seismic source location input parameter simultaneously.
At present in microseism seismic source location, usually adopt field survey and laboratory experiment determination microseism wave-wave speed.Field survey, normally before Microseismic monitoring system is installed, utilizes site test inverting microseism wave-wave speed in micro seismic monitoring region.Due to the property complicated and changeable of micro seismic monitoring regional tectonics and dielectric property, site test can only reflect the microseism wave-wave speed in some region in micro seismic monitoring region, can not represent the microseism wave-wave speed in monitored area under all paths completely; In addition by the impact of mining operation, microseism wave-wave speed in micro seismic monitoring region is moment change, the microseism wave-wave speed adopted in seismic source location also needs to revise according to on-site actual situations, and adopt site test determination microseism wave-wave speed not only to be well positioned to meet this demand, but also causing the dissipation of manpower and financial resources to a certain extent, economic benefit is poor.The true microseism wave-wave speed of micro seismic monitoring Test in Situ medium can not be reflected by the velocity of wave that small scale rock sample is tested in laboratory, if the velocity of wave tested in laboratory carries out seismic source location as microseism wave-wave speed must cause larger seismic source location error.
China Patent Publication No. CN102096093A, denomination of invention " a kind of microseism point that utilizes calculates the method for mining area seismic wave propagation speed as focus ", this invention is for the calculating of mining area seismic wave propagation speed, utilize microseism point as focus, the seismic event time that the microseism point recorded according to multiple predetermined sensor produces is determined the coordinate estimated value of microseism point to calculate mining area seismic wave propagation speed by the coordinate estimated value of microseism point.Because the coordinate estimated value of microseism point itself exists positioning error, the seismic wave velocity calculated therefore can be caused to there is error.Chinese patent publication No. CN103697999A, denomination of invention " a kind of heavily stressed hard rock TBM construction tunnel microseism velocity of wave real time acquiring method ", this application case arranges at least 4 microseismic sensors in the rock mass of heavily stressed hard rock TBM construction tunnel face rear, using the rock mass damage event that occurs near face as microquake sources, measure the volume coordinate of rock mass damage event, because rock mass damage usually occurs in rock mass deep, its true failure position is unknown, measure the volume coordinate obtained and certainly exist comparatively big error, therefore certain influence is existed to the microseism velocity of wave this coordinate points obtained as microquake sources inverting.In addition in order to obtain microseism wave-wave speed, above-mentioned two kinds of methods all need specific placement microseismic sensors, and this must cause expending of manpower and financial resources to a certain extent.
Therefore, need a kind of can fully utilize on-the-spot known focus human-generated explosives event and the method for microseismic sensors real-time testing microseism wave-wave speed that carries of existing Microseismic monitoring system, this is for accurately determining microseism wave-wave speed, thus raising microseism seismic source location precision is significantly.
Summary of the invention
Technical matters: the object of the invention is for above-mentioned Problems existing, provides the method for testing of a kind of method simple, easy to operate, real-time Obtaining Accurate microseism wave-wave speed.
Technical scheme: for achieving the above object, the method for testing determining microseism wave-wave speed in real time of the present invention, comprises the steps:
(1) utilize the human-generated explosives event of existing Microseismic monitoring system and known focus, in the existing space coordinates of Microseismic monitoring system, adopt the volume coordinate of each microseismic sensors and human-generated explosives event in total powerstation Accurate Determining Microseismic monitoring system;
(2) adopt the microseism waveform of Microseismic monitoring system monitoring human-generated explosives event, pick up microseism ripple that each microseismic sensors monitors then, according to each microseismic sensors then size sort, and to be designated as respectively: t
1, t
2, t
3, t
4t
it
n;
(3) using first microseismic sensors be triggered then as comparison other, utilize formula:
Adopt the arrival time difference of other microseismic sensors and first microseismic sensors that is triggered respectively and they are relative to the range difference real time inversion determination microseism wave-wave speed of human-generated explosives focus;
In formula: v is microseism wave-wave speed; I=2,3,4 ..., n, n represent the number of microseismic sensors in Microseismic monitoring system; t
1represent first microseismic sensors be triggered then, t
irepresent i-th microseismic sensors be triggered then; x
0, y
0, z
0and x
i, y
i, z
irepresent the volume coordinate of human-generated explosives focus and i-th microseismic sensors be triggered respectively.
Beneficial effect: owing to taking technique scheme, the present invention adopts the human-generated explosives event of microseismic sensors and the known focus carried in Microseismic monitoring system to determine microseism wave-wave speed in real time, and compared with prior art tool has the following advantages:
(1) adopt human-generated explosives event as microseism source inversion microseism wave-wave speed, the volume coordinate of human-generated explosives event can adopt all-station instrument accurate measurement, thus the microseism wave-wave speed error avoided because focus volume coordinate error causes, improve the precision of microseism wave-wave speed.
(2) directly utilize the microseismic sensors in existing Microseismic monitoring system and the existing space coordinates of Microseismic monitoring system to carry out microseism ripple Velocity Inversion, avoid the manpower and financial resources that installation microseismic sensors causes again and expend; And new space coordinates need not be set up, and simple to operate, economically feasible.
(3) can Real-time Obtaining microseism wave-wave speed, the microseism wave-wave speed adopted in microseism seismic source location is adjusted in real time, thus solve the problem that in the monitored area caused due to mining operation, microseism wave-wave speed may change, ensure that the real-time accuracy of microseism wave-wave speed, improve microseism seismic source location precision.
Accompanying drawing explanation
Fig. 1 is the schematic diagram determining microseism wave-wave speed method of testing in real time.
Fig. 2 is each microseismic sensors in embodiment in Microseismic monitoring system and human-generated explosives focus spatial distribution map.
Embodiment
Below in conjunction with accompanying drawing, a specific embodiment of the present invention is further described:
The method of testing determining microseism wave-wave speed in real time of the present invention, concrete steps are as follows:
(1) the human-generated explosives event of existing Microseismic monitoring system and known focus is utilized, in the existing space coordinates of Microseismic monitoring system, adopt the volume coordinate of each microseismic sensors and human-generated explosives event in total powerstation Accurate Determining Microseismic monitoring system, as shown in Figure 1, each sensor is designated as S respectively
1(x
1, y
1, z
1), S
2(x
2, y
2, z
2), S
3(x
3, y
3, z
3), S
4(x
4, y
4, z
4) ... S
i(x
i, y
i, z
i) ... S
n(x
n, y
n, z
n), explosion focus is designated as M (x
0, y
0, z
0);
(2) adopt the microseism waveform of Microseismic monitoring system monitoring human-generated explosives event, pick up microseism ripple that each microseismic sensors monitors then, according to each microseismic sensors then size sort, and to be designated as respectively: t
1, t
2, t
3, t
4t
it
n;
(3) using first microseismic sensors be triggered then as comparison other, utilize formula:
Adopt the arrival time difference of other microseismic sensors and first microseismic sensors that is triggered respectively and they are relative to the range difference real time inversion determination microseism wave-wave speed of human-generated explosives focus;
In formula: v is microseism wave-wave speed; I=2,3,4 ..., n, n represent the number of microseismic sensors in Microseismic monitoring system; t
1represent first microseismic sensors be triggered then, t
irepresent i-th microseismic sensors be triggered then; x
0, y
0, z
0and x
i, y
i, z
irepresent the volume coordinate of human-generated explosives focus and i-th microseismic sensors be triggered respectively.
Example 1, as shown in Figure 2, Certain Project has installed Microseismic monitoring system, and this Microseismic monitoring system contains 16 microseismic sensors.In the existing space coordinates of Microseismic monitoring system, adopt all-station instrument accurate measurement to obtain the volume coordinate of 16 microseismic sensors, the volume coordinate of each microseismic sensors refers to table 1.
The each microseismic sensors volume coordinate of table 1
During 29 days 15 July in 2014 37 points 30 seconds under key area 141 workplace of micro seismic monitoring lane carried out the test of human-generated explosives.As shown in Figure 2, the volume coordinate adopting this human-generated explosives event of all-station instrument accurate measurement is M (4372.0,2830.5 ,-73.9) in the position of human-generated explosives.Using this human-generated explosives event as the microquake sources calculating microseism wave-wave speed.The microseism ripple signal that human-generated explosives event causes will to space diffusion in monitored area, and 16 microseismic sensors in Microseismic monitoring system will receive the microseism waveform of this human-generated explosives event.
Utilize Microseismic monitoring system to monitor the microseism waveform of human-generated explosives event, the microseism waveform signal monitored is analyzed, picks up the microseism ripple of each microseismic sensors then, and the microseism ripple that each microseismic sensors is picked up then is sorted by size.The human-generated explosives microseism ripple that 16 microseismic sensors monitor then refers to table 2.
The human-generated explosives microseism ripple of each microseismic sensors monitoring of table 2 then
(4) as known from Table 2, microseismic sensors S7's is then minimum, shows that this microseismic sensors is triggered at first, and namely first is triggered, and by microseismic sensors S7, (it is then t
1=8.6ms) as comparison other, utilize formula:
Adopt respectively the arrival time difference of other microseismic sensors and microseismic sensors S7 and they relative to the range difference of human-generated explosives focus M solve determine microseism wave-wave speed;
Wherein, v is required microseism wave-wave speed; I=2,3,4 ..., n, n represent the number of microseismic sensors in Microseismic monitoring system, n=16 in the present embodiment; t
irepresent i-th microseismic sensors be triggered then, concrete numerical value can check in table 2; The volume coordinate of human-generated explosives focus is x in the present embodiment
0=4372.0, y
0=2830.5, z
0=-73.9; x
i, y
i, z
irepresent the volume coordinate of i-th microseismic sensors be triggered, concrete numerical value refers to table 1.
Above-mentioned parameter is substituted into formula (1), try to achieve the microseism wave-wave speed v=4273.3m/s in the present embodiment.
The microseism wave-wave speed v=4273.3m/s adopting the present invention to calculate carries out microseism seismic source location, and seismic source location precision is greatly improved, and seismic source location error-reduction, to 20 ~ 30m, can meet field engineering to positioning precision needs.
Claims (1)
1. determine a method of testing for microseism wave-wave speed in real time, it is characterized in that comprising the steps:
(1) utilize the human-generated explosives event of existing Microseismic monitoring system and known focus, in the existing space coordinates of Microseismic monitoring system, adopt the volume coordinate of each microseismic sensors and human-generated explosives event focus in total powerstation Accurate Determining Microseismic monitoring system;
(2) adopt the microseism waveform of Microseismic monitoring system monitoring human-generated explosives event, pick up microseism ripple that each microseismic sensors monitors then, according to each microseismic sensors then size sort, and to be designated as respectively:
;
(3) using first microseismic sensors be triggered then as comparison other, utilize formula:
（1）
Adopt the arrival time difference of other microseismic sensors and first microseismic sensors that is triggered respectively and they are relative to the range difference real time inversion determination microseism wave-wave speed of human-generated explosives focus;
In formula:
for microseism wave-wave speed;
,
represent the number of microseismic sensors in Microseismic monitoring system;
represent first microseismic sensors be triggered then,
represent the
ithe individual microseismic sensors be triggered then;
with
represent human-generated explosives focus and the respectively
ithe volume coordinate of the individual microseismic sensors be triggered.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2099751C1 (en) * | 1996-07-25 | 1997-12-20 | Объединенный институт физики Земли им. О.Ю.Шмидта РАН | Process of seismic microzoning |
| CN101770038A (en) * | 2010-01-22 | 2010-07-07 | 中国科学院武汉岩土力学研究所 | Intelligent positioning method of mine microquake sources |
| CN102506993A (en) * | 2011-11-21 | 2012-06-20 | 大同煤矿集团有限责任公司 | Coal mine downhole country rock slight shock detection method |
| CN103697999A (en) * | 2013-12-30 | 2014-04-02 | 中国科学院武汉岩土力学研究所 | Method for acquiring micro seismic wave speed of high-stress hard rock TBM (Tunnel Boring Machine) construction tunnel in real time |
| CN104100297A (en) * | 2014-07-31 | 2014-10-15 | 煤炭科学技术研究院有限公司 | Self-vibrating type micro-quake monitoring system and self-vibrating type micro-quake monitoring method |
-
2014
- 2014-11-21 CN CN201410677037.8A patent/CN104406681B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2099751C1 (en) * | 1996-07-25 | 1997-12-20 | Объединенный институт физики Земли им. О.Ю.Шмидта РАН | Process of seismic microzoning |
| CN101770038A (en) * | 2010-01-22 | 2010-07-07 | 中国科学院武汉岩土力学研究所 | Intelligent positioning method of mine microquake sources |
| CN102506993A (en) * | 2011-11-21 | 2012-06-20 | 大同煤矿集团有限责任公司 | Coal mine downhole country rock slight shock detection method |
| CN103697999A (en) * | 2013-12-30 | 2014-04-02 | 中国科学院武汉岩土力学研究所 | Method for acquiring micro seismic wave speed of high-stress hard rock TBM (Tunnel Boring Machine) construction tunnel in real time |
| CN104100297A (en) * | 2014-07-31 | 2014-10-15 | 煤炭科学技术研究院有限公司 | Self-vibrating type micro-quake monitoring system and self-vibrating type micro-quake monitoring method |
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