CN105652314B - Based on the definite method of the mine floor collapse dept of micro seismic monitoring - Google Patents
Based on the definite method of the mine floor collapse dept of micro seismic monitoring Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012544 monitoring process Methods 0.000 title claims abstract description 19
- 239000003245 coal Substances 0.000 claims abstract description 22
- 238000009826 distribution Methods 0.000 claims abstract description 15
- 230000035939 shock Effects 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 239000011435 rock Substances 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 3
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- 238000011161 development Methods 0.000 abstract description 2
- 238000004364 calculation method Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/288—Event detection in seismic signals, e.g. microseismics
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/30—Analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/64—Geostructures, e.g. in 3D data cubes
- G01V2210/646—Fractures
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Abstract
The invention discloses a kind of methods that mine floor collapse dept is determined based on micro seismic monitoring, belong to the technical fields such as Safety of Coal Mine Production, the technical issues of mainly solving to determine collapse dept by micro seismic monitoring.This method includes the following steps：Determine the average elevation of working face seat earth；Lay microseism wave detector；Filtering, microseismic event positioning and definite related focal shock parameter；Bottom plate microseismic event is analyzed, determines the distribution curve of bottom plate microseismic event number and energy along depth；Plate destructing depth is determined along the distribution curve of depth direction according to the average elevation of working face seat earth and bottom plate microseismic event number and energy.The present invention realizes the dynamic monitoring of plate destructing depth, is Water Inrush accident early warning convenient for determining the development trend of plate destructing depth；And the layer position of coal seam floor failure is determined, so as to which the work for preventing harnessing the river for bottom plate provides foundation.
Description
Technical field
The invention belongs to the technical fields such as Safety of Coal Mine Production.More particularly to the micro seismic monitoring skill of mine floor collapse dept
Art.
Background technology
Seat earth cracking depth is an important indicator for being related to Safety of Coal Mine Production, mainly there is theoretical calculation at present
Method, empirical formula method, field measurement method, indoor Analog simulation method, Method for Numerical.Theoretical calculation is that coal geology is simplified
Into corresponding mathematical model, using relevant theory of mechanics, mechanical model is established, using the failure criteria of rock, calculates coal seam
Plate destructing depth.But the Seam Floor Failure depth formula that theoretical calculation obtains is built upon some basic assumptions basis
On, these hypothesis are to be not suitable for the mechanical characteristics of rock mass, this will certainly be deviated the plate destructing depth of calculating.Through
It is that field personnel sums up the Practical Formula come in process of production to test equation.These empirical equation parameters are simple, easily
In acquisition, therefore it is always the foundation that plate destructing depth calculates with very big practicability.But with the increasing of mining depth
Add, the result of calculation of empirical equation and actually have very big deviation so that empirical equation has in the application that deep fractures are exploited
Certain limitation.Indoor Analog simulation method is that laboratory test simulation is done in laboratory with analog material, and equivalent material simulating is examined
Worry factor is less and idealizes, therefore only has the meaning of theoretical research, is restricted in terms of practical application.Method for Numerical
It is to calculate plate destructing depth using numerical simulation software, it may be considered that many factors influence coal seam floor failure, and convenience of calculation
Fast, but various parameters are difficult to accurately determine.
Field measurement is mainly realized using the method for probing water filling (slip casting), geophysical exploration, micro seismic monitoring, with other
Method compares, and the significant advantage of field measurement is that the plate destructing depth obtained is more accurate.The shortcomings that one maximum of probing method, exists
In the collapse dept that can only measure some point, and in the presence of the constructions such as tomography, the influence to collapse dept be difficult to by
Probing method monitors.The disadvantage of geophysical method is：Due to the complexity of geophysical field, geophysics side is caused
Method monitoring accuracy is poor.Microseism is established on the basis of the micro- destruction of bottom plate is monitored, and On Microseismic Monitoring Technique is applied to colliery bottom
Determining for plate collapse dept, a kind of practical and effective means are provided for Safety of Coal Mine Production.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of mine floor collapse dept based on micro seismic monitoring really
Determine method.Coal seam is located at sedimentary rock environment, and what plate destructing depth determined substantially determines coal seam floor failure layer position.It is true using microseism
The principle for determining coal seam floor failure layer position is：The spatial position of most microseismic events should be located at more than coal seam floor failure layer position.
The technical scheme is that：Based on the definite method of the mine floor collapse dept of micro seismic monitoring, step is as follows：
1) average elevation of mine floor to be monitored is determined：According to the contour map of mine floor to be monitored, determine to wait to supervise
Survey the average elevation of mine floor；
2) microseism wave detector is laid：Two groups of microseism wave detectors are arranged in track lane and the air return lane of coal mine work area
Mine floor to be monitored, principle of layouting：1. track lane and air return lane are moving towards direction and depth direction in staggeredly cloth along colliery
It puts；2. it is arranged in non-producing side；3. microseism detector interval is between 100m, local location wave detector in track lane or air return lane
Away from encryption to 60m.4. microseism wave detector is arranged in hard rock, it is close to palisades；By every group of microseism detection of mine floor to be detected
Device uses cable connection respectively, then with microseism data acquisition Monitor Sub-Station of Less within coal mines is set to be connected, forms one and completely supervise
Survey grid；
3) filtering, microseismic event positioning and focal shock parameter are determined successively：Microseism data acquisition Monitor Sub-Station of Less passes through optical fiber
With storage server on the ground is set to be connected, the storage server that the Wave data monitored is passed to ground in real time carries out
Filtering, microseismic event judge, microseismic event positioning and focal shock parameter determine；
4) distribution curve of mine floor microseismic event number to be monitored and energy along depth is determined：According to microseismic event
Spatial and temporal distributions position and the energy size of microseismic event, obtain mine floor microseismic event number to be monitored and energy along depth
Distribution curve；
5) plate destructing depth is determined：It is bent along the distribution of depth according to mine floor microseismic event number to be detected and energy
Line, determine mine floor maximum microseismic event numerical digit to be monitored in absolute altitude, this absolute altitude is subtracted into the flat of mine floor to be detected
Equal absolute altitude is mine floor collapse dept to be detected.
Beneficial effects of the present invention：1. the dynamic monitoring of plate destructing depth is realized, convenient for determining plate destructing depth
Development trend is Water Inrush accident early warning；2. determine the layer position of coal seam floor failure, so as to the work for preventing harnessing the river for bottom plate provide according to
According to.
Description of the drawings
Fig. 1 is the contour map of bottom plate working face seat earth.
Fig. 2 is Microseismic monitoring system network topological diagram.
Fig. 3 is the scatter chart of bottom plate microseismic event number and energy along depth.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical scheme is carried out it is clear, completely retouch
It states.The invention discloses a kind of definite method of the mine floor collapse dept based on micro seismic monitoring, the method includes as follows
Step：
1) seat earth average elevation to be detected is determined；
2) microseism wave detector is laid；
3) filtering, microseismic event positioning and definite related focal shock parameter is definite；
4) distribution curve of bottom plate microseismic event number and energy along depth is determined；
5) plate destructing depth is determined；
Embodiment
(1) according to the contour of bottom plate working face seat earth, it can be seen that in the contour of working face seat earth
The floor absolute altitude in the lower left corner is up to+276m, the upper right corner floor minimum+225m of absolute altitude, takes its average value to be, then working face coal
Layer bottom plate average elevation is+250m.
(2) two groups of 15 microseism wave detectors are arranged in the track lane of coal mine work area and the bottom plate of air return lane, it will
The microseism wave detector of bottom plate is connected by cables to the microseism acquisition substation of underground, forms a complete monitoring net, as shown in the figure；
(3) microseism acquisition substation with optical fiber is connected to the master server on ground, monitoring data are passed to ground in real time
Master server be filtered, microseismic event positioning and determine determining for related focal shock parameter；
(4) according to the positioning of the spatial and temporal distributions of microseismic event and the energy size of microseismic event, bottom plate microseismic event number is made
The distribution curve of mesh and energy along depth, as shown in the figure；
(5) according to the distribution curve of bottom plate microseismic event number and energy along depth, determine bottom plate maximum microseismic event and
The depth that energy is located at, it is plate destructing depth that this depth is subtracted working face seat earth average elevation；
There are two types of microseism wave detector deployment scenarios：The first, as shown in the figure, when satisfying the requirements in underworkings space, adopts
With along tunnel both sides, respectively 15 microseism wave detectors of arrangement, microseism detector interval are controlled between 50m-100m；Second, in well
It when lower lane space does not satisfy the requirements, is arranged in using 15 wave detectors in a tunnel, the drilling of installation microseism wave detector should
The both sides in same tunnel are distributed, to avoid microseism wave detector on same straight line, the drilling of installation microseism wave detector should be towards not
Same direction, to avoid microseism wave detector at grade；
After coal work proceeds by, 24 it is small when uninterrupted sampling working face micro seismic monitoring data, in gatherer process,
Reply face advance and working face geology situation carry out detailed record.
According to distribution curve of the bottom plate microseismic event number along depth, the depth that bottom plate maximum microseismic event is located at is determined.
The average value of seat earth absolute altitude is calculated, seat earth absolute altitude average value is equal to seat earth maximum absolute altitude and adds coal
The absolute altitude summation of layer bottom plate minimum, then divided by after 2 obtains seat earth average elevation.
The depth that the bottom plate maximum microseismic event that microseismic event determines is located at is subtracted each other with seat earth average elevation, then
It takes absolute value, this absolute value is exactly Seam Floor Failure depth.
The method can be to a kind of means of definite offer of Seam Floor Failure depth, and describe accurately, to be applied to
Follow-up study has important practical significance.
Claims (1)
1. a kind of definite method of mine floor collapse dept based on micro seismic monitoring, which is characterized in that step is as follows：
1) average elevation of mine floor to be monitored is determined：According to the contour map of mine floor to be monitored, coal to be monitored is determined
The average elevation of ore deposit bottom plate；
2) microseism wave detector is laid：Two groups of microseism wave detectors are arranged in the track lane of coal mine work area and treating for air return lane
Monitor mine floor, principle of layouting：1. track lane and air return lane are in interlaced arrangement moving towards direction and depth direction along colliery；②
Microseism wave detector is arranged in non-producing side；3. microseism detector interval is in 100m, local location inspection in track lane or air return lane
Ripple device spacing is encrypted to 60m；4. microseism wave detector is arranged in hard rock, it is close to palisades；It is micro- by every group of mine floor to be detected
It shakes wave detector and uses cable connection respectively, then with microseism data acquisition Monitor Sub-Station of Less within coal mines is set to be connected, formation one is complete
Whole monitoring net；
3) filtering, microseismic event positioning and focal shock parameter are determined successively：Microseism data gathers Monitor Sub-Station of Less by optical fiber with setting
Storage server connection on the ground is put, the storage server that the Wave data monitored is passed to ground in real time is filtered
Ripple, microseismic event judge, microseismic event positioning and focal shock parameter determine；
4) distribution curve of mine floor microseismic event number to be monitored and energy along depth is determined：According to the space-time of microseismic event
The energy size of Distribution and localization and microseismic event obtains the distribution of mine floor microseismic event number to be monitored and energy along depth
Curve；
5) plate destructing depth is determined：According to the distribution curve of mine floor microseismic event number to be detected and energy along depth,
Determine mine floor maximum microseismic event numerical digit to be monitored in absolute altitude, this absolute altitude is subtracted to the average mark of mine floor to be detected
Height is mine floor collapse dept to be detected.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106249287B (en) * | 2016-07-27 | 2018-06-29 | 陕西煤业化工技术研究院有限责任公司 | A kind of determining method of coal mine travelling limit angle |
| CN108919348B (en) * | 2018-09-19 | 2023-06-27 | 东北大学 | Intelligent grouting measurement and control system for fractured rock mass and implementation method |
| CN109884055B (en) * | 2019-03-04 | 2019-10-11 | 山东科技大学 | Stope overlying strata separation layer monitoring method based on optical fiber |
| CN113093271B (en) * | 2021-03-18 | 2022-02-15 | 北京科技大学 | Method for performing coal bed CT detection by using geological drilling arranged microseismic sensors |
| CN113703053B (en) * | 2021-08-31 | 2023-09-26 | 中煤科工集团重庆研究院有限公司 | Dynamic monitoring method and system for water damage microseism of working face |
| CN114397421B (en) * | 2021-11-29 | 2022-11-01 | 中煤科工开采研究院有限公司 | Mining coal seam floor damage depth monitoring method |
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