CN106249287A - A kind of determination method of colliery travelling limit angle - Google Patents
A kind of determination method of colliery travelling limit angle Download PDFInfo
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- G01V1/288—Event detection in seismic signals, e.g. microseismics
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract
The invention discloses the determination method of a kind of colliery travelling limit angle, including the multiple microseism cymoscopes being crisscross arranged at coal-face, each microseism cymoscope is connected with data acquisition and monitoring station, multiple data acquisition and monitoring stations connect one complete monitoring net of composition by optical fiber, it is connected to ground-based server, ground-based server releases energy along the regularity of distribution of work surface trend according to coal mine work area top board microseismic event number and the microseism of monitoring, leading infection distance l and the roof strata thickness h that are determined by work surface obtain the traveling angle θ that rock stratum is movable, the inventive method is reasonable in design, calculate simplicity, the effective minimizing coal mining loss to surface buildings, ensure the safety in production in mine, promote Economy of Mine Regions development and social stability, there is great economic worth and social meaning.
Description
[technical field]
The invention belongs to the technical field such as Safety of Coal Mine Production and mining engineering, be specifically related to a kind of colliery travelling limit angle
Determination method.
[background technology]
At present, strata movement and subsidence that underground mining causes are Problems of Underground Engineerings the most serious,
During underground mining, stress of primary rock balance is destroyed, and country rock deforms, moves, and even produces large area and moves.Along with
The increase of mining depth, the continuous extraction of Ore, surrouding rock deformation, movement and destruction are gradually aggravated.And some mines of China due to
The travelling limit angle determined in recovery process is unreasonable so that produce in the building on earth's surface and production facility are in turnover zone
Destroying, not only safety in production and stablizing of surface buildings to mine cause serious threat, and likely bring huge
Economic loss.But, rationally determining of travelling limit angle is sufficiently complex, on the one hand travelling limit angle choose safety to be met
The needs produced, on the other hand land area to be reduced as far as, reduce cost of winning.The most scientific and reasonable determination
The movement of rock formation in ground surface angle of mine underground exploitation, is a great scientific research difficult problem.Improve underground engineering strata movement angular dimensions
The accuracy of prediction, the always research emphasis in mining engineering field.Sum up the domestic and international current situation in this field and research
Achievement, the prediction theory of travelling limit angle mainly has with Forecasting Methodology: 1. field monitoring method;2. theoretical analysis method;3. thing
Reason analogy method;4. numerical analysis method etc..Wherein field monitoring method needs to arrange big measurement point, relatively costly and monitoring
Time is longer;Theoretical analysis method due to the complexity of field condition, is difficult to set up and a set of matches with on-site actual situations
Theoretical model and method;On the basis of physical simulating method condition the most at the scene, field condition is done a large amount of simplification, thus
The result causing physical simulating method is bigger with field monitoring result difference;Numerical analysis method is often limited to be used
Analysis method, constitutive equation, additionally in numerical analysis method, the selection of rock mass parameter is also the most difficult, so causing numerical value
The result of analogy method is difficult to corresponding with scene.
In recent years, obtained sending out rapidly as a kind of rock mass micro rupture three dimensions monitoring technology On Microseismic Monitoring Technique
Exhibition, microseism mainly monitors rock mass fragile material under external force, occur micro rupture time, sky, strong (time, space, intensity)
And relevant focal shock parameter.On Microseismic Monitoring Technique is used widely in mine at home and abroad, presses research with becoming deeps mines
An important means with management.A large amount of scholar collieries at home are installed Microseismic monitoring system be used for carrying out rock burst impact ground
Preventing and controlling in terms of the coal and rock dynamic disasters such as pressure, landslide, coal and gas prominent and gushing water.Deep is become at micro seismic monitoring
A kind of colliery based on micro seismic monitoring travelling limit angle is set up on the basis of one important means of rock pressure research and management
Determination method, for widening the range of application of micro seismic monitoring, reduce Coal Mine Disasters, save fund input, ensure mine safety
Produce significant.
[summary of the invention]
The technical problem to be solved is reasonably to determine colliery travelling limit angle, the method provide a kind of based on
The determination method of the colliery travelling limit angle of micro seismic monitoring, for widening the range of application of micro seismic monitoring, reduces colliery fund and throws
Enter, ensure that Mine Safety in Production has great economic worth and social meaning.
The present invention is by the following technical solutions: the determination method of a kind of colliery travelling limit angle, is adopting including being crisscross arranged
Multiple microseism cymoscopes of coal work surface, each described microseism cymoscope is connected with data acquisition and monitoring station, multiple described data
Gather monitoring station and connect one complete monitoring net of composition by optical fiber, be connected to surface data storage and processing server, institute
State surface data storage and processing server to release energy edge according to coal mine work area top board microseismic event number and the microseism of monitoring
The regularity of distribution of work surface trend, leading infection distance l and the roof strata thickness h that are determined by work surface obtain rock stratum activity
Traveling angle θ.
Further, described leading infection distance l determines on the basis of energy threshold, when the energy of microseism release is less than energy
During amount threshold values, the energy of this region microseismic event release is ignored;When the energy of microseism release is higher than energy threshold, this district
The energy of territory microseismic event is relatively big, determines leading infection distance l of work surface.
Further, leading infection distance l of described work surface takes absolute value, particularly as follows:
L=L-L '
Wherein, L is work surface position, and L ' is leading infection position.
Further, described roof strata thickness h is the vertical dimension between soil layer base plate and roof.
Further, described traveling angle θ is:
θ=arctan (l/h)
Wherein, l is leading infection distance, and h is roof strata thickness.
Further, the layout rules of described microseism cymoscope is: is arranged in the track lane of coal mine work area and returns
The mine floor to be monitored of air way, and non-producing side, move towards direction and depth direction be interlaced arrangement, pay close attention to along colliery
Area intensive is laid.
Further, described microseism cymoscope is pressed 80-120m spacing in track lane or return airway and is laid, and pays close attention to district
In territory, described microseism cymoscope is pressed 30-80m spacing and is laid.
Further, described microseism cymoscope is arranged in hard rock, is close to crag, the installation of each described microseism cymoscope
Hole is towards difference.
Further, described data acquisition and monitoring station includes explosion-proof tank, be provided with in described explosion-proof tank optical-electrical converter and
Underground work station, uses series system to be connected to surface data storage through optical-electrical converter between described data acquisition and monitoring station
Data storage and process is carried out with processing server.
Further, the one end at described underground work station is connected with multiple microseism cymoscopes by communication cable, described well
The other end of lower work station is connected with optical-electrical converter by netting twine.
Compared with prior art, the present invention at least has the advantages that
The invention provides a kind of new colliery travelling limit angle and measure means, will by the microseism cymoscope being crisscross arranged
The top board microseism practical situation at coal-face scene is sent to ground-based server and monitors in real time, and certainty of measurement is high, measures
Mode is safe and simple, and the leading infection distance and the roof strata thickness that are determined by work surface just can be calculated rock stratum activity
Traveling angle, effectively save production cost.
Further, the boring of microseism cymoscope is towards difference, it is to avoid microseism cymoscope is disposed on the same plane impact
Certainty of measurement, and paying close attention to area intensive lay collection information, measure signal by optical-electrical converter carry out the signal of telecommunication with
After the mutually conversion of optical signal, it is sent to ground-based server, on the basis of energy threshold, is quickly drawn rock by antitrigonometric function
The traveling angle of layer.
The determination method of a kind of colliery of present invention travelling limit angle is according to traveling angle and ore body plan production zone, permissible
On earth's surface, correspondence marks an effective moving area, it is to avoid have personnel activity in moving area, transfers to industrial activity move
Outside dynamic region, the determination for mine expropriation of land, resettlement scope is significant, both can avoid because of expropriation of land, resettlement model
Enclose too small and cause people's property and safety to be on the hazard, expropriation of land, resettlement scope can be avoided again excessive and cause spending excessive,
The determination of traveling angle simultaneously has certain guidance suggestion for the addressing on mine square, by the prison to colliery strata movement
Survey can effectively reduce the coal mining loss to surface buildings, it is ensured that the safety in production in mine, promotes Economy of Mine Regions development
And social stability.
In sum, the determination method of a kind of colliery of this method travelling limit angle, accurately, traveling angle determines simplicity in monitoring,
Can adapt to long-distance transmissions needs, there is great economic worth and social meaning.
Below by drawings and Examples, technical scheme is described in further detail.
[accompanying drawing explanation]
Fig. 1 is that data transmission link of the present invention builds and data flow schematic diagram;
Fig. 2 is the microseismic region microseismic event of the present invention energy profile at work surface;
Fig. 3 is the determination method flow diagram of colliery of the present invention travelling limit angle.
Wherein: 1. optical fiber;2. optical-electrical converter;3. underground work station;4. explosion-proof tank;5. netting twine;6. surface data storage
And processing server;7. data flow;8. microseism cymoscope;9. communication cable.
[detailed description of the invention]
" building, water body, railway and main roadway coal column stay and set and mining pressed coal code " is to rim angle, traveling angle and splits
Seam angle has carried out detailed definition.It is that mining causes ground that rim angle is boundary point to the connecting line what is called border of gob edge
The boundary point of table deformation;Traveling angle is the outermost point of satisfied certain slope, curvature and horizontal distortion rate to goaf
The connecting line on border and the horizontal line angle in coal column side claim traveling angle;Angle of break is the principal section at subsidence trough
On, the line of basin edge macrocrack to gob edge and the horizontal line angle in coal column side.Rim angle is mainly used
In considering Affected areas by mining;Traveling angle is mainly used in the impact considering earth's surface deformation to Surface structure;Angle of break is mainly examined
Consider earth's surface and produce the scope of macrocrack.The result of study of forefathers shows: rock mass deforms the most at the beginning and just produces acoustic emission, and
Be to arrive to a certain degree in deformation, i.e. rock mass starts to produce damage, and rock mass macroscopic cracking starts to produce acoustic emission before producing.Rock mass
Starting to produce damage and mean the generation of rock mass inelastic deformation, often rock mass inelastic deformation is to earth's surface rock mass and building structure
Become considerable influence, i.e. can effectively determine that ahead work face affects distance and travelling limit angle by micro seismic monitoring, therefore, based on
Micro seismic monitoring result may determine that colliery travelling limit angle.
Refer to shown in Fig. 1 to Fig. 3, the invention discloses the determination method of a kind of colliery travelling limit angle, including interlocking
Being arranged on multiple microseism cymoscopes 8 of coal-face, each described microseism cymoscope 8 is connected with data acquisition and monitoring station, many
Individual described data acquisition and monitoring station connects one complete monitoring net of composition by optical fiber 1, is connected to surface data storage and place
Reason server 6, the storage of described surface data and processing server 6 are according to the coal mine work area top board microseismic event number and micro-of monitoring
Shake releases energy along the regularity of distribution of work surface trend, is determined by leading infection distance l and the roof strata thickness h of work surface
Obtain the traveling angle θ that rock stratum is movable.Data acquisition and monitoring station includes explosion-proof tank 4, is provided with optical-electrical converter in described explosion-proof tank 4
2 and underground work station 3, adopt to be connected serially by optical-electrical converter 2 between data acquisition and monitoring station and carry out data transmission.
The one end at underground work station 3 is connected with multiple microseism cymoscopes 8 by communication cable 9, and the other end at described underground work station 3 leads to
Cross netting twine 5 to be connected with optical-electrical converter 2.
Described method comprises the steps of:
1) set up Microseismic monitoring system in aim coal mine, carry out microseism cymoscope and circuit according to the concrete condition of work surface
Lay.
Basic principle laid by microseism cymoscope 8:
1. direction is being moved towards along colliery and depth direction is interlaced arrangement in main transportation roadway and assistant conveyance lane;
2. non-producing side it is arranged in;
3. the spacing of 80-120m is selected to lay according to actual geology and mining situation in main transportation roadway and assistant conveyance lane
Microseism cymoscope, the position that local need to be paid close attention to selects the spacing encryption of 30-80m to lay microseism cymoscope;
4. microseism cymoscope is arranged in hard rock, is close to crag;
5. microseism cymoscope is staggered in level and in vertical direction, arranges around target area to be monitored.
Data transmission link builds:
1. the corresponding relation between underground work station 3 and microseism cymoscope 8: according to microseism cymoscope lay basic principle,
Monitoring purpose and the actual geological condition of coal mine work area to be monitored, determine that orientation arranged by microseism cymoscope, install microseism cymoscope 8
After, microseism cymoscope is connected to underground work station by communication cable;Microseism cymoscope and down-hole is determined by Knock test
The corresponding relation of work station;
2. the data communication relation between underground work station 3 and surface data storage and processing terminal: underground work station 3 is adopted
Transmitting data with series system, micro seismic monitoring real time data is obtained by microseism cymoscope 8, is then passed by communication cable 9
Delivering to underground work station 3, underground work station 3 is sent to surface data by switch, optical-electrical converter 2 and optical fiber 1 and stores
With processing terminal server 6.
2) filtering, microseismic event location and focal shock parameter are determined successively: the underground work station 3 after series connection is by optical fiber 1
Be arranged on ground surface data storage and processing server 6 be connected, in real time the Wave data monitored is passed to ground
Storage server be filtered, microseismic event judge, microseismic event location and the determination of focal shock parameter.
3) statistics and analysis coal mine work area to be monitored top board microseismic event number and microseism release energy along the advance of the face
The regularity of distribution in direction, determines energy threshold, so that it is determined that micro seismic monitoring is along leading infection distance l in advance of the face direction,
Energy threshold has the most negligible feature of energy less than the release of the microseismic event in energy threshold region, work surface
Leading infection distance l take absolute value, particularly as follows:
L=L-L '
Wherein, L is work surface position, and L ' is leading infection position.
4) according to the geologic column situation of work surface, roof strata thickness h (not comprising the thickness of overlying soil) is determined,
It is specially the vertical dimension between soil layer base plate and roof.
5) according to leading infection distance l and roof strata thickness h, the traveling angle θ that calculating digs up mine causes rock stratum movable is:
θ=arctan (l/h)
Wherein, l is leading infection distance, and h is roof strata thickness, between soil layer base plate and roof vertical away from
From.
Embodiment
(1) set up Microseismic monitoring system in aim coal mine, carry out microseism cymoscope and line according to the concrete condition of work surface
Road is laid.Two groups of microseism cymoscopes 8 are arranged in track lane and the mine floor to be monitored of return airway of coal mine work area,
Track lane and return airway are moving towards direction and depth direction is interlaced arrangement along colliery, are arranged in non-producing side, in track lane or
In return airway, microseism detector interval is encrypted to spacing 60m at 100m, local location, and microseism cymoscope is arranged in hard rock, tightly
Patch crag.The often group microseism cymoscope 8 of mine floor to be detected is connected with communication cable 9 respectively, then with setting within coal mines
Microseism data gather Monitor Sub-Station of Less connect, form a complete monitoring net.
Microseism cymoscope deployment scenarios has two kinds:
The first, when underworkings space satisfies the requirements, use and respectively arrange that a number of microseism is examined along both sides, tunnel
Ripple device 8, the direction of arrow that each microseism cymoscope 8 flows to 7 according to Real-time Monitoring Data carries out data transmission, microseism cymoscope 8
Spacing is according to on-site actual situations control;
The second, when underworkings space does not satisfies the requirements, uses a number of cymoscope to be arranged in a tunnel
In, the boring installing microseism cymoscope should be distributed in the both sides in same tunnel, with avoid microseism cymoscope on same straight line,
The boring installing microseism cymoscope should be towards different directions, to avoid microseism cymoscope at grade.
(2) filtering, microseismic event location and focal shock parameter are determined successively: microseism data gathers Monitor Sub-Station of Less and passes through optical fiber
Being connected with being arranged on ground storage server, the storage server that the Wave data monitored passes to ground in real time is carried out
Filtering, the judgement of microseismic event, the location of microseismic event and the determination of focal shock parameter.After coal work proceeds by, 24
The micro seismic monitoring data of hour uninterrupted sampling work surface, in gatherer process, reply face advance and work surface geology feelings
Condition carries out itemized record.
(3) according to top board micro seismic monitoring result, add up and analyze microseism and release energy along the distribution in advance of the face direction
Rule, so that it is determined that micro seismic monitoring is along the leading infection distance in advance of the face direction, leading infection distance to be determined, it is necessary to first
Determine energy threshold (referring in Fig. 2 along shown in the heavy line of abscissa direction).
The foundation that energy threshold determines:
When the energy of microseism release is less than energy threshold, the energy of this region microseismic event release can be ignored not substantially
Meter;
When the energy of microseism release is higher than energy threshold, the energy of this region microseismic event is bigger, it is impossible to ignore.
(4) according to work surface drill hole geologic situation, roof strata thickness (not comprising the thickness of overlying soil) is comprehensively determined.
Work surface geotechnical boring and top board divide band situation as shown in the table:
Roof strata thickness h=618.43m-232.47m=385.96m.
(5) according to leading infection distance and roof strata thickness, calculate mining and cause the traveling angle of rock stratum activity.Colliery
Ahead work face impact distance and traveling angle corresponding relation are as shown in the table
Described method provides a kind of new colliery travelling limit angle and measures means, by the research to colliery strata movement
Can effectively reduce the coal mining loss to surface buildings, it is ensured that the safety in production in mine, promote Economy of Mine Regions development and
Social stability, has great economic worth and social meaning.
Above content is only the technological thought that the present invention is described, it is impossible to limit protection scope of the present invention with this, every presses
The technological thought proposed according to the present invention, any change done on the basis of technical scheme, each fall within claims of the present invention
Protection domain within.
Claims (10)
1. the determination method of a colliery travelling limit angle, it is characterised in that include being crisscross arranged at coal-face is multiple
Microseism cymoscope (8), each described microseism cymoscope (8) is connected with data acquisition and monitoring station, multiple described data acquisition and monitorings
Stand and connect one complete monitoring net of composition by optical fiber (1), be connected to surface data storage and processing server (6), described
Surface data storage and processing server (6) release energy edge according to coal mine work area top board microseismic event number and the microseism of monitoring
The regularity of distribution of work surface trend, leading infection distance l and the roof strata thickness h that are determined by work surface obtain rock stratum activity
Traveling angle θ.
The determination method of a kind of colliery the most according to claim 1 travelling limit angle, it is characterised in that described leading infection
Distance l determines on the basis of energy threshold, when the energy of microseism release is less than energy threshold, this region microseismic event release
Energy is ignored;When the energy of microseism release is higher than energy threshold, the energy of this region microseismic event is relatively big, determines work
Leading infection distance l in face.
The determination method of a kind of colliery the most according to claim 2 travelling limit angle, it is characterised in that described work surface
Leading infection distance l takes absolute value, particularly as follows:
L=L-L '
Wherein, L is work surface position, and L ' is leading infection position.
The determination method of a kind of colliery the most according to claim 1 travelling limit angle, it is characterised in that described roof strata
Thickness h is the vertical dimension between soil layer base plate and roof.
The determination method of a kind of colliery the most according to claim 1 travelling limit angle, it is characterised in that described traveling angle θ
For:
θ=arctan (l/h)
Wherein, l is leading infection distance, and h is roof strata thickness.
The determination method of a kind of colliery the most according to claim 1 travelling limit angle, it is characterised in that described microseism detection
The layout rules of device (8) is: be arranged in the track lane of coal mine work area and the mine floor to be monitored of return airway, Yi Jifei
Exploitation side, moves towards direction and depth direction is interlaced arrangement along colliery, pays close attention to area intensive and lays.
The determination method of a kind of colliery the most according to claim 6 travelling limit angle, it is characterised in that described microseism detection
Device (8) is pressed 80-120m spacing in track lane or return airway and is laid, and pays close attention in region, and described microseism cymoscope (8) is pressed
30-80m spacing is laid.
The determination method of a kind of colliery the most according to claim 7 travelling limit angle, it is characterised in that described microseism detection
Device (8) is arranged in hard rock, is close to crag, and the installing hole of each described microseism cymoscope (8) is towards difference.
The determination method of a kind of colliery the most according to claim 1 travelling limit angle, it is characterised in that described data acquisition
Monitoring station includes explosion-proof tank (4), is provided with optical-electrical converter (2) and underground work station (3), described number in described explosion-proof tank (4)
Series system is used to be connected to surface data storage and processing server through optical-electrical converter (2) between monitoring station according to gathering
(6) data storage and process are carried out.
The determination method of a kind of colliery the most according to claim 9 travelling limit angle, it is characterised in that described down-hole work
The stand one end of (3) is connected with multiple microseism cymoscopes (8) by communication cable (9), the other end of described underground work station (3)
It is connected with optical-electrical converter (2) by netting twine (5).
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Cited By (2)
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CN108930554A (en) * | 2018-08-20 | 2018-12-04 | 煤炭科学技术研究院有限公司 | Well-ground-air combined monitoring method of the fracture of coal mine overlying strata and surface strata movement |
CN111208211A (en) * | 2020-01-17 | 2020-05-29 | 大连理工大学 | Knocking device for positioning and correcting deep microseism of rock mass |
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