CN106249287B - A kind of determining method of coal mine travelling limit angle - Google Patents
A kind of determining method of coal mine travelling limit angle Download PDFInfo
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- CN106249287B CN106249287B CN201610602909.3A CN201610602909A CN106249287B CN 106249287 B CN106249287 B CN 106249287B CN 201610602909 A CN201610602909 A CN 201610602909A CN 106249287 B CN106249287 B CN 106249287B
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Abstract
The invention discloses a kind of determining methods of coal mine travelling limit angle, including being staggered in multiple microseism wave detectors of coal working face, each microseism wave detector is connect 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 the regularity of distribution moved towards along working face according to the coal mine work area top plate microseismic event number of monitoring and microseism, the traveling angle θ of rock stratum activity is obtained by the leading infection distance l and roof strata thickness h that determine working face, the method of the present invention reasonable design, it calculates easy, the effective loss for reducing coal mining to surface buildings, ensure the safety in production in mine, promote Economy of Mine Regions development and social stability, with great economic value and social effect.
Description
【Technical field】
The invention belongs to the technical fields such as Safety of Coal Mine Production and mining engineering, and in particular to a kind of coal mine travelling limit angle
Determining method.
【Background technology】
At present, strata movement caused by underground mining and subsidence are a very serious Problems of Underground Engineering,
During underground mining, stress of primary rock balance is destroyed, and country rock deforms, moves or even generate large area movement.With
The increase of mining depth, ore constantly produce, surrouding rock deformation, movement and destruction gradually aggravation.And some mines in China due to
The travelling limit angle determined in recovery process is unreasonable so that the building and production facility of earth's surface are in turnover zone and generate
It destroys, serious threat is not only caused to the stabilization of the safety in production in mine and surface buildings, but also it is possible that bring huge
Economic loss.However, rationally determining for travelling limit angle is sufficiently complex, the selection of one side travelling limit angle will meet safety
On the other hand the needs of production will be reduced as far as land area, reduce cost of winning.Therefore how scientific and reasonable to determine
The movement of rock formation in ground surface angle of mine underground exploitation, is a great scientific research problem.Improve underground engineering strata movement angular dimensions
The accuracy of prediction is always the research emphasis in mining engineering field.It summarizes both at home and abroad in the current situation in the field and research
Achievement, the prediction theory of travelling limit angle mainly have with Forecasting Methodology：1. field monitoring method；2. theoretical analysis method；3. object
Manage analogy method；4. numerical analysis method etc..Wherein field monitoring method needs to arrange a large amount of measurement points, and cost is higher and monitors
Time is longer；Theoretical analysis method a set of is matched with on-site actual situations due to the complexity of field condition it is difficult to establish
Theoretical model and method；Physical simulating method often at the scene on the basis of condition, does field condition a large amount of simplification, so as to
Result and the field monitoring result difference for causing physical simulating method are larger；Used by numerical analysis method is often limited to
Analysis method, constitutive equation, in addition the selection of rock mass parameter is also very difficult in numerical analysis method, so causing numerical value
The result of analogy method is difficult corresponding with scene.
In recent years, as a kind of rock mass micro rupture three dimensions monitoring technology --- On Microseismic Monitoring Technique has obtained rapid hair
Exhibition, microseism mainly monitors rock mass fragile material under external force, occur micro rupture when, sky, strong (time, space, intensity)
And related focal shock parameter.On Microseismic Monitoring Technique is at home and abroad used widely in mine, becomes deeps mines ground pressure research
With an important means of management.A large amount of scholars at home in coal mine installation Microseismic monitoring system for carrying out rock burst impact ground
Preventing and controlling in terms of the coal and rocks dynamic disasters such as pressure, landslide, coal and gas prominent and gushing water.Become deep in micro seismic monitoring
A kind of coal mine travelling limit angle based on micro seismic monitoring is established on the basis of one important means of rock pressure research and management
Determining method, for widening the application range of micro seismic monitoring, reduce Coal Mine Disasters, save fund input, ensure mine safety
Production is of great significance.
【Invention content】
The technical problems to be solved by the invention are that reasonably determining coal mine travelling limit angle, this method provide one kind and be based on
The determining method of the coal mine travelling limit angle of micro seismic monitoring for widening the application range of micro seismic monitoring, reduces coal mine fund and throws
Enter, ensure that Mine Safety in Production has great economic value and social effect.
The present invention uses following technical scheme：A kind of determining method of coal mine travelling limit angle, is being adopted including being staggered
Multiple microseism wave detectors of coal working face, each microseism wave detector are connect with data acquisition and monitoring station, multiple data
It acquires monitoring station and one complete monitoring net of composition is connected by optical fiber, be connected to surface data storage and processing server, institute
Surface data storage and processing server is stated to be released energy edge according to the coal mine work area top plate microseismic event number of monitoring and microseism
The regularity of distribution of working face trend obtains rock stratum activity by the leading infection distance l and roof strata thickness h that determine working face
Traveling angle θ.
Further, the leading infection distance l is determined on the basis of energy threshold, when the energy of microseism release is less than energy
When measuring threshold values, the energy of the region microseismic event release is ignored；When the energy of microseism release is higher than energy threshold, the area
The energy of domain microseismic event is larger, determines the leading infection distance l of working face.
Further, the leading infection distance l of the working face takes absolute value, specially：
L=L-L '
Wherein, L is working face position, and L ' is leading infection position.
Further, vertical range of the roof strata thickness h between soil layer bottom plate and roof.
Further, the 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 the microseism wave detector are：It is arranged in the track lane of coal mine work area and returns
Mine floor to be monitored and the non-producing side of air way move towards direction and depth direction in interlaced arrangement along coal mine, pay close attention to
Area intensive is laid.
Further, the microseism wave detector is laid in track lane or air return lane by 80-120m spacing, pays close attention to area
In domain, the microseism wave detector is laid by 30-80m spacing.
Further, the microseism wave detector is arranged in hard rock, is close to palisades, the installation of each microseism wave detector
Hole direction is different.
Further, the data acquisition and monitoring station includes explosion-proof tank, be provided in the explosion-proof tank photoelectric converter and
Underground work station is connected to surface data by photoelectric converter using series system between the data acquisition and monitoring station and stores
Data storage and processing are carried out with processing server.
Further, the one end at the underground work station is connect by communication cable with multiple microseism wave detectors, the well
The other end of lower work station is connect by cable with photoelectric converter.
Compared with prior art, the present invention at least has the advantages that：
The present invention provides a kind of new coal mine travelling limit angle mensuration means, will by the microseism wave detector being staggered
The top plate microseism actual conditions at coal working face scene are sent to ground-based server and are monitored in real time, high certainty of measurement, measure
Mode is safe and simple, and rock stratum activity can be calculated by the leading infection distance and roof strata thickness that determine working face
Traveling angle, effectively save production cost.
Further, the drilling of microseism wave detector avoids microseism wave detector from being disposed on the same plane influence towards difference
Measurement accuracy, and acquisition information is laid paying close attention to area intensive, measuring signal by photoelectric converter into horizontal electrical signal and
After the mutual conversion of optical signal, ground-based server is sent to, on the basis of energy threshold, rock is quickly obtained by antitrigonometric function
The traveling angle of layer.
A kind of determining method of coal mine travelling limit angle of the present invention, can be with according to traveling angle and ore body plan production zone
Correspondence marks an effective moving area in earth's surface, avoids having personnel activity in moving area, industrial activity is transferred to shifting
Except dynamic region, it is of great significance for mine expropriation of land, resettlement the determining of range, it both can be to avoid because of expropriation of land, resettlement model
Enclose it is too small and cause people's property and safety be on the hazard, and can to avoid expropriation of land, resettlement range it is excessive and cause to pay wages it is excessive,
The addressing determined for mine square of traveling angle has certain guidance opinion simultaneously, passes through the prison to coal mine strata movement
Survey can effectively reduce loss of the coal mining to surface buildings, ensure the safety in production in mine, promote Economy of Mine Regions development
And social stability.
In conclusion a kind of determining method of coal mine travelling limit angle of this method, monitoring is accurate, and traveling angle determines simplicity,
It can adapt to transmit needs at a distance, there is great economic value and social effect.
Below by drawings and examples, technical scheme of the present invention is described in further detail.
【Description of the drawings】
Fig. 1 is built for data transmission link of the present invention and data flow schematic diagram；
Fig. 2 is energy profile of the microseismic region microseismic event of the present invention in working face；
Fig. 3 is the determining method flow diagram of coal mine travelling limit angle of the present invention.
Wherein：1. optical fiber；2. photoelectric converter；3. underground work station；4. explosion-proof tank；5. cable；6. surface data stores
And processing server；7. data flow；8. microseism wave detector；9. communication cable.
【Specific embodiment】
《Building, water body, railway and main roadway coal column, which stay, to be set and mining pressed coal regulation》To rim angle, traveling angle and split
Seam angle has carried out detailed definition.Rim angle is that the so-called boundary of connecting line of boundary point to gob edge causes ground for mining
The boundary point of table deformation；Traveling angle is to meet the outermost point of certain slope, curvature and horizontal distortion rate to goaf
The connecting line on boundary claims traveling angle with angle of the horizontal line in coal column side；Angle of break is the principal section in subsidence trough
On, line and angle of the horizontal line in coal column side of basin most edge macrocrack to gob edge.Rim angle is mainly used
In consideration Affected areas by mining；Traveling angle is mainly used for considering the influence that earth's surface is deformed to Surface structure；Angle of break is mainly examined
Consider the range that earth's surface generates macrocrack.The result of study of forefathers shows：Not deformation at the beginning just generates sound emission to rock mass, and
It is to be reached to a certain degree in deformation, i.e., rock mass starts to generate damage, and rock mass macroscopic cracking starts to generate sound emission before generating.Rock mass
Start to generate the generation for damaging and meaning rock mass inelastic deformation, often rock mass inelastic deformation is to earth's surface rock mass and building structure
Into larger impact, i.e., it can effectively determine that ahead work face influences distance and travelling limit angle by micro seismic monitoring, therefore, be based on
Micro seismic monitoring is the result is that coal mine travelling limit angle can be determined.
Shown in please referring to Fig.1 to Fig.3, the invention discloses a kind of determining method of coal mine travelling limit angle, including staggeredly
Multiple microseism wave detectors 8 of coal working face are arranged on, each microseism wave detector 8 is connect with data acquisition and monitoring station, more
A data acquisition and monitoring station connects one complete monitoring net of composition by optical fiber 1, is connected to surface data storage and place
Manage server 6, surface data storage and processing server 6 is according to the coal mine work area top plate microseismic event number of monitoring and micro-
The regularity of distribution for releasing energy and being moved towards along working face is shaken, passes through and determines the leading infection distance l of working face and roof strata thickness h
Obtain the traveling angle θ of rock stratum activity.Data acquisition and monitoring station includes explosion-proof tank 4, and photoelectric converter is provided in the explosion-proof tank 4
2 and underground work station 3, it adopts to be connected serially by photoelectric converter 2 between data acquisition and monitoring station and carries out data transmission.
The one end at underground work station 3 is connect by communication cable 9 with multiple microseism wave detectors 8, and the other end at the underground work station 3 leads to
Cable 5 is crossed to connect with photoelectric converter 2.
The method comprises the following steps：
1) Microseismic monitoring system is established in aim coal mine, microseism wave detector and circuit is carried out according to the concrete condition of working face
It lays.
Microseism wave detector 8 lays basic principle：
1. direction and depth direction are being moved towards in interlaced arrangement along coal mine in main transportation roadway and assistant conveyance lane；
2. it is arranged in non-producing side；
3. it is laid in main transportation roadway and assistant conveyance lane according to the spacing of practical geology and mining situation selection 80-120m
Microseism wave detector is laid in microseism wave detector, the spacing encryption of position selection 30-80m that need to locally pay close attention to；
4. microseism wave detector is arranged in hard rock, it is close to palisades；
5. microseism wave detector staggeredly, is arranged in level and in vertical direction around target area to be monitored.
Data transmission link is built：
1. the correspondence between underground work station 3 and microseism wave detector 8：According to microseism wave detector lay basic principle,
Purpose and the practical geological condition of coal mine work area to be monitored are monitored, determines that microseism wave detector arranges orientation, installation microseism wave detector 8
Afterwards, microseism wave detector is connected to underground work station by communication cable；Microseism wave detector and underground are determined by Knock test
The correspondence of work station；
2. the data communication relationship between underground work station 3 and surface data storage and processing terminal：It adopts at underground work station 3
Data are transmitted with series system, micro seismic monitoring real time data is obtained by microseism wave detector 8, is then passed by communication cable 9
It send to underground work station 3, underground work station 3 is sent to surface data by interchanger, photoelectric converter 2 and optical fiber 1 and stores
With processing terminal server 6.
2) filtering, microseismic event positioning and focal shock parameter are determined successively：Underground work station 3 after series connection passes through optical fiber 1
With surface data storage and processing server 6 on the ground is set to connect, the Wave data monitored is passed into ground in real time
Storage server be filtered, microseismic event judgement, microseismic event positioning and focal shock parameter determine.
3) statistics and analysis coal mine work area top plate microseismic event number to be monitored 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 leading infection distance l of the micro seismic monitoring along advance of the face direction,
Energy threshold has the characteristics that the energy that the microseismic event less than energy threshold region discharges is substantially negligible, working face
Leading infection distance l take absolute value, specially：
L=L-L '
Wherein, L is working face position, and L ' is leading infection position.
4) according to the geologic column situation of working face, roof strata thickness h (thickness for not including overlying soil) is determined,
Vertical range specially between soil layer bottom plate and roof.
5) it according to leading infection distance l and roof strata thickness h, calculates mining and causes the traveling angle θ of rock stratum activity to be：
θ=arctan (l/h)
Wherein, l be leading infection distance, h be roof strata thickness, between soil layer bottom plate and roof it is vertical away from
From.
Embodiment
(1) Microseismic monitoring system is established in aim coal mine, microseism wave detector and line is carried out according to the concrete condition of working face
It lays on road.Two groups of microseism wave detectors 8 are arranged in the track lane of coal mine work area and the mine floor to be monitored of air return lane,
Track lane and air return lane are moving towards direction and depth direction in interlaced arrangement along coal mine, are arranged in non-producing side, in track lane or
Microseism detector interval is in 100m in air return lane, and local location is encrypted to spacing 60m, and microseism wave detector is arranged in hard rock, tightly
Paste palisades.Every group of microseism wave detector 8 of mine floor to be detected is connected respectively with communication cable 9, then with setting within coal mines
Microseism data acquisition Monitor Sub-Station of Less connection, formed a complete monitoring net.
There are two types of microseism wave detector deployment scenarios：
The first, when satisfying the requirements in underworkings space, respectively arranges that a certain number of microseisms are examined using along tunnel both sides
Wave device 8, the arrow direction that each microseism wave detector 8 flows to 7 according to Real-time Monitoring Data carry out data transmission, microseism wave detector 8
Spacing is controlled according to on-site actual situations；
Second, when not satisfying the requirements in underworkings space, a tunnel is arranged in using a certain number of wave detectors
Interior, the drilling of installation microseism wave detector should be distributed in the both sides in same tunnel, to avoid microseism wave detector on same straight line,
The drilling for installing microseism wave detector should be towards different directions, to avoid microseism wave detector in the same plane.
(2) 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 connect, the storage server that the Wave data monitored is passed to ground in real time carries out
Filtering, the judgement of microseismic event, the positioning of microseismic event and focal shock parameter determine.After coal work proceeds by, 24
The micro seismic monitoring data of hour uninterrupted sampling working face in gatherer process, cope with face advance and working face geology feelings
Condition carries out detailed record.
(3) according to top plate micro seismic monitoring as a result, the distribution that statistics and analysis microseism release energy along advance of the face direction
Rule, so that it is determined that leading infection distance of the micro seismic monitoring along advance of the face direction, will determine leading infection distance, it is necessary to first
Determine energy threshold (please 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 the region microseismic event release can be ignored not substantially
Meter；
When the energy of microseism release is higher than energy threshold, the energy of the region microseismic event is larger, it is impossible to ignore.
(4) according to working face drill hole geologic situation, comprehensive determining roof strata thickness (thickness for not including overlying soil).
Working face geology drills and top plate point band situation is 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, the traveling angle that mining causes rock stratum activity is calculated.Coal mine
Ahead work face influences distance and traveling angle correspondence is as shown in the table
The method provides a kind of new coal mine travelling limit angle mensuration means, passes through the research to coal mine strata movement
Loss of the coal mining to surface buildings can effectively be reduced, ensure the safety in production in mine, promote Economy of Mine Regions development and
Social stability has great economic value and social effect.
More than content is merely illustrative of the invention's technical idea, it is impossible to protection scope of the present invention is limited with this, it is every to press
According to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within claims of the present invention
Protection domain within.
Claims (7)
- A kind of 1. determining method of coal mine travelling limit angle, which is characterized in that including being staggered in the multiple of coal working face Microseism wave detector (8), each microseism wave detector (8) connect with data acquisition and monitoring station, multiple data acquisition and monitorings It stands through optical fiber (1) connection one complete monitoring net of composition, is connected to surface data storage and processing server (6), it is described Surface data storage and processing server (6) releases energy edge according to the coal mine work area top plate microseismic event number of monitoring and microseism The regularity of distribution of working face trend, leading infection distance l and top plate caused by by determining that coal mine moves towards long-armed working face mining Depth of stratum h obtains the traveling angle θ of rock stratum activity；The leading infection distance l is determined on the basis of energy threshold, when the energy of microseism release is less than energy threshold, the area The energy of domain microseismic event release is ignored；When the energy of microseism release is higher than energy threshold, the region microseismic event Energy is larger, determines that the leading infection distance l of working face, the leading infection distance l of the working face take absolute value, specially：L=L-L 'Wherein, L is working face position, and L ' is leading infection position；Vertical range of the roof strata thickness h between soil layer bottom plate and roof.
- A kind of 2. determining method of coal mine travelling limit angle according to claim 1, which is characterized in that the traveling angle θ For：θ=arctan (l/h)Wherein, l is leading infection distance, and h is roof strata thickness.
- A kind of 3. determining method of coal mine travelling limit angle according to claim 1, which is characterized in that the microseism detection The layout rules of device (8) are：It is arranged in the track lane of coal mine work area and the mine floor to be monitored of air return lane, Yi Jifei Exploitation side moves towards direction and depth direction in interlaced arrangement along coal mine, pays close attention to area intensive laying.
- A kind of 4. determining method of coal mine travelling limit angle according to claim 3, which is characterized in that the microseism detection Device (8) is laid in track lane or air return lane by 80-120m spacing, is paid close attention in region, the microseism wave detector (8) is pressed 30-80m spacing is laid.
- A kind of 5. determining method of coal mine travelling limit angle according to claim 4, which is characterized in that the microseism detection Device (8) is arranged in hard rock, is close to palisades, and the mounting hole direction of each microseism wave detector (8) is different.
- A kind of 6. determining method of coal mine travelling limit angle according to claim 1, which is characterized in that the data acquisition Monitoring station includes explosion-proof tank (4), and photoelectric converter (2) and underground work station (3), the number are provided in the explosion-proof tank (4) Surface data storage and processing server is connected to by photoelectric converter (2) using series system according between acquisition monitoring station (6) data storage and processing are carried out.
- A kind of 7. determining method of coal mine travelling limit angle according to claim 6, which is characterized in that the underground work The stand one end of (3) is connect by communication cable (9) with multiple microseism wave detectors (8), and the other end of the underground work station (3) leads to Cable (5) is crossed to connect with photoelectric converter (2).
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| CN108930554B (en) * | 2018-08-20 | 2019-11-19 | 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 |
| CN111208211B (en) * | 2020-01-17 | 2021-06-18 | 大连理工大学 | Knocking device for positioning and correcting deep microseism of rock mass |
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