CN101581789A - Mine working face inter-lane seismic wave CT detection method - Google Patents
Mine working face inter-lane seismic wave CT detection method Download PDFInfo
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Abstract
The invention discloses a mine working face inter-lane seismic wave CT detection method which is a highly precise detection method for a geologic anomalous body in the mine working face, namely, seismic wave CT detection which is similar to medical CT and relates to a practical technique by taking the coal mine coal face as a research object and utilizing an upper lane and a lower lane for CT detection. An observation system relates to the relative relationship between a trigger point and a receiving point in space, and generally, the trigger point (adopting mining explosive as a seismic focus) is arranged at one lane, and the receiving point is arranged at another lane, and the observation mode of 'one-trigger, multi-receiving, and one-explosion, one-release' is adopted. After a coordinate system is established, the coordinate parameters of each point of the observation system are determined, and inversion calculation is conducted by utilizing an inter-lane seismic wave CT tomography technique, thus obtaining seismic velocity equal CT inversion slice in the working face so as to accurately and effectively judge the geological structure and the anomalous body trace in the working face. The method has better pertinence to the geological structure and the interpretation of anomaly thereof, and can provide reliable technical parameters for safe production in mines. The method broadens the application scope of the seismic wave CT detection technique and improves the accuracy for geologic anomalous body detection in the mine working face.
Description
Technical field:
The present invention relates to geologic anomaly body Detection Techniques in a kind of mine working face face, relate in particular to the mine seismic wave CT Detection Techniques that geologic anomaly bodies such as tomography, dirt band, the thick variation zone of coal, karst collapse col umn in the workplace face are surveyed.
Background technology:
In the Coal Production process, the continuous application of particularly novel mine comprehensive mechanical coal mining means, more and more higher to the requirement of the productive exploration data in colliery.Safety of Coal Mine Production requires to accomplish " one through three prevention ".Here " three is anti-" said just is meant waterproof, fire prevention, anti-gas; " one is logical " is meant ventilation.Accomplish this some, at first will understand the exploitation geologic condition in the mine (as tomography, fold, shatter belt, dirt band, the thick variation zone of coal, karst collapse col umn, tectonic stress district etc.).And conventional ground 3-d seismic exploration can only solve the tomography of the interior drop of workplace face greater than 5m, and the amplitude of fluctuation greater than 10m is often arranged on the position; Other geophysical prospecting method of down-hole often is subjected to metal support, water pipe, metallic conductor, power-equipment, various cable and particularly all signal is caused very big interference with objective factors such as the telephone wire of ground conducting, signal wires.See that theoretically seismic wave CT technology can be detected the geologic anomaly condition in the mining production fully.Principle with tomography in the practical application is applied to geophysical survey, by field data collection and processing, dopes the subsurface geology anomalous body, can judge its structural feature and locus exactly.Had and just can work up the most reasonably exploitation measure after the condition data of production geology comprehensively and accurately and instruct production, help like this enhancing productivity, improve the utilization factor of coal resources, instruct carrying out fast and efficiently of mining production effectively, avoid great personnel and property loss, accomplish safe high-yield and high-efficiency.
Summary of the invention:
Technical matters to be solved by this invention is to survey at geologic anomaly bodies such as tomography, dirt band, the thick variation zone of coal, karst collapse col umn in the mine working face face, the present invention proposes a kind of mine working face inter-lane seismic wave CT detection method, improved the detection accuracy of geologic anomaly body in the face, has detection data reliability height, detection method is simple and direct, result of detection is clear and intuitive, precision is high, can satisfy the advantages such as technical requirement that mining is produced fully.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
Mine working face inter-lane seismic wave CT detection method is characterized in that comprising following steps:
1) elder generation excites the big gun hole at a roadway construction of mine coal-cutting workplace, and its parameter is as follows usually:
The position: it is a gang of near coal-face to be positioned at the tunnel;
Hole depth: 1.2-1.8m;
The hole to: horizontal vertical in group and point in the coal-face face;
Aperture: can put explosive into and get final product;
Borehole spacing: 10～15m;
Big gun hole height: all beat, i.e. the identical about 1.2-1.8m of height at the bottom of the lane at the gradeline place;
Dose: every big gun hole 70～120g emulsion explosive of packing into;
Breeching: the forward powder charge, the yellow mud shutoff is to the aperture of borehole;
2) receive the wave detector sequence of seismic signal in other roadway arrangement of workplace, wave detector requires to be arranged in 1.2-1.8m height on the roadway floor in the recording geometry, the spacing of wave detector is at 10～15m, drill rod can be squeezed into the coal seam, and wave detector is fixed on reaches the receiver coupling condition on the drill rod, require drill rod to be parallel to roof and floor, carry out as the geophone station of rock and edit and record, wave detector is connected to data recording equipment;
3) after above-mentioned steps is finished, ignite big gun hole explosive one by one, excite the mine working face seismic event, each wave detector in the recording geometry receives simultaneously gathers the mine working face geological data; Finally finish the collecting work of mine working face geological data after repeatedly blowing out;
4) during data processing, set up coordinate system, determine each big gun hole, each wave detector position coordinate parameters of recording geometry, form Parameter File to excite acceptance point position and workplace relation; Select suitable grid cell, search coverage is carried out grid dividing, form the roughly the same pixel of yardstick one by one, and the value of the average value of wave speed in the pixel as its central point; After grid forms, pick up during in conjunction with the travelling to of different ripple groups, and utilize the inter-lane seismic wave CT chromatography imaging technique to carry out the Inversion Calculation of distinct methods, mainly utilizing direct rays and curved rays method to carry out seismic travel time follows the trail of, utilize arithmetic associating alternative manner (SIRT method), least square method (LSQR method) etc. to carry out Inversion Calculation, images such as the interior two-dimentional velocity of wave of reconstruction face, the CT inverting section that further draws property parameters such as the longitudinal and transverse wave-wave speed of seismic event, dynamic modulus of elasticity;
5) carry out analysis-by-synthesis according to the unusual of multiattribute parameters such as velocity of wave, dynamic modulus of elasticity and roadway workface exposure geologic information, judge the structural attitude and the regularity of distribution thereof in the workplace, form workplace structural attitude integrated interpretation figure.
Described mine working face inter-lane seismic wave CT detection method, it is characterized in that: the placement of borehole and wave detector can be mine working face two tunnels up and down, also cut eye or crossheading etc., what detect is the geologic condition of part between big gun hole and the wave detector, can form geologic condition multiattribute CT slice map in the workplace.
Advantage of the present invention:
1, improved detection accuracy: can find out the above extension situation of tomography in workplace of drop 1m that the mine working face tunnel has disclosed; Can find out that drop is greater than extended length, the extension direction of 3m potential fault in workplace in the mine working face; Can find out that thickness of coal seam is less than the distribution developmental state of 1m " the thick thinning belt of coal " in the mine working face.
2, increased distance and the ray degree of covering that penetrates: single hole explosive dose source-detector distance between 70～120g can reach 1000m, avoids because sparse zone of ray even blind area are caused in the intersection station, thereby has effectively increased the ray degree of covering.
3, detection method is easy, and is effective.
4, result of detection is clear and intuitive, precision is high, can satisfy the technical requirement that mining is produced fully.
5, data reliability height: be not subjected to the influence of roadway support mode, metal support, water pipe, metallic conductor, power-equipment, various cable, signal wire etc., the data reliability height.
Description of drawings:
Fig. 1 is a mine inter-lane seismic wave CT detection system synoptic diagram;
Fig. 2 is velocity of longitudinal wave CT section and key drawing thereof;
Fig. 3 is a workplace comprehensive geology key drawing;
Fig. 4 is a thickness of coal seam isoline distribution plan behind the working face extraction.
Embodiment:
The invention will be further described below in conjunction with accompanying drawing, and the two lanes of mine working face seismic wave CT detection method comprises the steps:
1) excites the explosive source mode in the hole that adopts.Usually go up construction tier hole, lane earlier as shown in Figure 1 in a tunnel, the first bombard is cut the about 2m of eye from workplace, and second big gun is later on every big gun hole of 10～15m construction.Its big gun hole parameter is as follows usually:
Hole depth: 1.5m;
The hole to: horizontal vertical in group and point in the workplace face;
The aperture: (general diameter 42mm) is as the criterion with mining air drill, can put explosive into and get final product;
Big gun hole height: all beat, i.e. the about 1.5m of height (or guaranteeing) at the bottom of the lane in same level height at the gradeline place;
The selection of detonator: choose identical or be slightly more than same batch of detonator of big gun hole count, preferably minimum time-delay (I section) instantaneous cap with the big gun hole count; If not this kind detonator, follow-up DATA PROCESSING need be proofreaied and correct the detonator time-delay.
Dose: every big gun hole 70～120g emulsion explosive of packing into;
Breeching: the forward powder charge, the yellow mud shutoff is to the aperture of borehole.
For the destruction that prevents to explode to adjacent bores, increase the powder charge difficulty of adjacent bores, and according to the overall arrangement of real work, the scene can disposablely install medicine or per ten big guns, one dress with the big gun hole, but must put by a big gun one.If run into when unusual such as tomography can suitably disclose the zone encryption shot points at tomography at two dishes.
2) arranging wave detector as lane under Fig. 1 simultaneously, the wave detector of recording geometry requires to be arranged in 1.5m height on the roadway floor, the track pitch of wave detector is at 10～15m, drill rod can be squeezed into the coal seam, carry out as the geophone station of rock and to edit and record, require drill rod to be parallel to roof and floor, and wave detector is fixed on reaches the receiver coupling condition on the drill rod.
3) adopt according to the method described above and ignite the observed pattern that big gun hole explosive, each wave detector write down the mine working face seismic data simultaneously one by one, the employing continuous high-efficient is blown out, guarantee maximum fan-shaped coverage and stacking fold, finally finish the collecting work of mine working face geological data.After setting up coordinate system, determine the cautious coordinate parameters of each big gun of recording geometry, utilize the inter-lane seismic wave CT chromatography imaging technique to carry out Inversion Calculation, draw CT inverting section, and property parameters such as base area seismic velocity carries out geologic structure interpretation.
Example: geologic condition is comparatively complicated in certain ore deposit 328 workplace face, and workplace integral body is a uniclinal structure, and workplace machine, air way disclose 5 tomographies altogether.In order to find out connection and the extension situation of these tomographies in workplace, carried out this pair lane seismic wave CT and surveyed.Shot point is arranged in the air way, totally 48 shot points, shotpoint spacing average out to 10m; Geophone station is arranged in the machine lane, amounts to 48, and the some anomaly is 10m.For guaranteeing precision, bring computing into the eyeball distance during actual computation.Utilize the mine seismic wave CT readout process software of developing voluntarily to carry out inverting and draw the longitudinal wave velocity section as shown in Figure 2.
This workplace was since back production on February 22 in 2005, back production to April 29 the time cut eye place and met tomography, on May 7th, 2005 this workplace has been carried out the CT detection for this reason,, does this face back production end fully at present until being forced to receive because of the obstruction of the major fault in the place ahead on January 26th, 2006.It is identical fine to compare by disclosed actual geology structural attitude of working face extraction and CT result of detection, and its detection accuracy to the geology anomalous body reaches more than 90%.SIRT method fixedly slowness initial value contrast is resolved, and has marked the boundary line of tomography with the relative low regime of compressional wave, and high velocity mainly directly marks with tomography in the drawings with tomography is intimate consistent.The velocity of wave comparatively homogeneous that distributes totally illustrates that the coal seam is comparatively stable on the whole among Fig. 2.
1) detects 3 tomography Fjs1, Fjs2, Fjs4 and actual identical fine (as shown in Figure 3) that disclose in four tomographies being explained.Wherein opened again because of the influence of tomography Fjs2 in the exploitation process and cut eye; Because not only drop is big but also the extension in face is longer for tomography Fjs1, thereby has hindered the smooth back production of workplace, finally be forced to receive work because of crossing this tomography.Contrast finds that the judgement of Fjs3 tomography and actual geology disclose a bit and comes in and goes out, and this position is an area of stress concentration in fact.By Fig. 4 back production thickness of coal seam isogram as can be known: this place is because trap-down Fjs2 and trap-up Fjs4 mutual extrusion, make the coal seam thicken and be subjected to bigger pressure effect, cause herein stress to be concentrated and make the velocity of propagation of ripple in the coal seam increase relatively, show as the high speed effect.
2) detect 3 tomography zone of influence GY1, GY2, the GY3 that is explained, have only back production to pass through this tomography zone of influence of GY3, it is consistent with the CT result of detection that back production discloses the coverage that actual tomography Fjs4 causes.And GY1, GY2 be owing to too greatly and are not directly passed through by the influence of tomography in the process of back production, and this and actual geologic condition match.
Thereby the reliability and the validity of this Detection Techniques system have been verified.
Claims (2)
1, mine working face inter-lane seismic wave CT detection method is characterized in that comprising following steps:
1) elder generation excites the big gun hole at a roadway construction of mine coal-cutting workplace, and its parameter is as follows usually:
The position: it is a gang of near coal-face to be positioned at the tunnel;
Hole depth: 1.2-1.8m;
The hole to: horizontal vertical in lane group and point in the workplace face;
Aperture: can put explosive into and get final product;
Borehole spacing: 10～15m;
Big gun hole height: all beat, i.e. the identical about 1.2-1.8m of height at the bottom of the lane at the gradeline place;
Dose: every big gun hole 70～120g emulsion explosive of packing into;
Breeching: the forward powder charge, the yellow mud shutoff is to the aperture of borehole;
2) receive the wave detector sequence of seismic signal in other roadway arrangement of workplace, wave detector requires to be arranged in 1.2-1.8m height on the roadway floor in the recording geometry, and the spacing of wave detector is at 10～15m; Drill rod can be squeezed into the coal seam, wave detector is fixed on reaches the receiver coupling condition on the drill rod, require drill rod to be parallel to roof and floor, carry out as the geophone station of rock and edit and record, wave detector is connected to data recording equipment;
3) after above-mentioned steps is finished, ignite big gun hole explosive one by one and carry out seismic event and excite, to require to ignite electric detonator be same batch and have minimum time-delay.Each wave detector in the recording geometry receives simultaneously gathers each observation station seismic data; Finally finish the collecting work of mine working face geological data after repeatedly blowing out;
4) during data processing, set up coordinate system, determine each big gun hole, each wave detector position coordinate parameters of recording geometry, form Parameter File to excite acceptance point position and workplace relation; Select suitable grid cell, search coverage is carried out grid dividing, form the roughly the same pixel of yardstick one by one, and the value of the average value of wave speed in the pixel as its central point; After grid forms, pick up during in conjunction with the travelling to of different ripple groups, and utilize the inter-lane seismic wave CT chromatography imaging technique to carry out the Inversion Calculation of distinct methods, mainly utilizing direct rays and curved rays method to carry out seismic travel time follows the trail of, utilize arithmetic associating alternative manner (SIRT method), least square method (LSQR method) etc. to carry out Inversion Calculation, images such as the interior two-dimentional velocity of wave of reconstruction face, the CT inverting section that further draws property parameters such as the longitudinal and transverse wave-wave speed of seismic event, dynamic modulus of elasticity;
5) carry out analysis-by-synthesis according to the unusual of multiattribute parameters such as velocity of wave, dynamic modulus of elasticity and roadway workface exposure geologic information, judge the structural attitude and the regularity of distribution thereof in the workplace, form workplace structural attitude integrated interpretation figure.
2, mine working face inter-lane seismic wave CT detection method according to claim 1, it is characterized in that: the placement of borehole and wave detector can be two tunnels of mine working face, also cut eye or crossheading, and can form geologic condition multiattribute CT slice map in the workplace.
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| CN101798923A (en) * | 2010-03-30 | 2010-08-11 | 煤炭科学研究总院重庆研究院 | System and method for remote control coal mine evacuation working face advance detection and forecasting |
| CN102520441A (en) * | 2011-11-30 | 2012-06-27 | 朱德兵 | Method for acquiring earthquake exploration data through roadway oriented detection |
| WO2015002557A2 (en) | 2014-10-30 | 2015-01-08 | Instytut Technik Innowacyjnych Emag | Method and system for measuring relative changes in stress concentration in front of a longwall |
| CN105137475A (en) * | 2015-09-17 | 2015-12-09 | 中煤科工集团西安研究院有限公司 | Belt conveyor-based coal mine working face real-time detection system and method |
| CN105604557A (en) * | 2015-12-30 | 2016-05-25 | 福建工程学院 | Shield construction boulder detection method based on seismic CT |
| CN105765408A (en) * | 2014-10-30 | 2016-07-13 | 伊迈格创新技术学院 | Method and system for analysis of geological structure and relative changes in stress in the layers located above the workings of underground mine |
| CN106597538A (en) * | 2016-12-14 | 2017-04-26 | 中国电建集团贵阳勘测设计研究院有限公司 | Seismic wave CT imaging method between holes |
| CN106772597A (en) * | 2016-12-12 | 2017-05-31 | 中国矿业大学 | Take man-made explosion as the method for vibration signal inverting coal mine work area stress distribution |
| CN106772595A (en) * | 2016-12-05 | 2017-05-31 | 中国矿业大学 | A kind of method that detonator time delay is eliminated in shock wave Velocity Inversion for colliery |
| CN107741459A (en) * | 2017-11-14 | 2018-02-27 | 中国电建集团贵阳勘测设计研究院有限公司 | Utilize the method and device of sonic tomography technology detection lithologic anomalous body between hole |
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| CN110374584A (en) * | 2019-06-19 | 2019-10-25 | 中国矿业大学 | A kind of tunnel relaxation zone and the area visualization detection method that leaks out that drills |
| CN110748341A (en) * | 2019-09-24 | 2020-02-04 | 河南理工大学 | Method for detecting influence radius of controllable seismic source based on carbon dioxide blasting |
| CN110954961A (en) * | 2019-11-22 | 2020-04-03 | 山西晋煤集团技术研究院有限责任公司 | Large-sector mine working face radio wave penetration system and method |
| CN111413735A (en) * | 2020-05-11 | 2020-07-14 | 安徽理工大学 | Coal face rapid earthquake transmission chromatography method capable of simultaneously exciting multiple seismic sources |
| CN112305601A (en) * | 2019-07-31 | 2021-02-02 | 中国石油化工股份有限公司 | Seismic exploration acquisition excitation well design method based on chromatographic inversion |
| CN112415577A (en) * | 2020-11-24 | 2021-02-26 | 中国矿业大学(北京) | Method and system for embedding detector under karst landform |
| CN112433245A (en) * | 2020-11-04 | 2021-03-02 | 陕西彬长孟村矿业有限公司 | Coal mine fault structure prediction method |
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| CN101798923A (en) * | 2010-03-30 | 2010-08-11 | 煤炭科学研究总院重庆研究院 | System and method for remote control coal mine evacuation working face advance detection and forecasting |
| CN101798923B (en) * | 2010-03-30 | 2013-07-10 | 煤炭科学研究总院重庆研究院 | System and method for remote control coal mine evacuation working face advance detection and forecasting |
| CN102520441A (en) * | 2011-11-30 | 2012-06-27 | 朱德兵 | Method for acquiring earthquake exploration data through roadway oriented detection |
| CN102520441B (en) * | 2011-11-30 | 2013-06-19 | 朱德兵 | Method for acquiring earthquake exploration data through roadway oriented detection |
| WO2015002557A2 (en) | 2014-10-30 | 2015-01-08 | Instytut Technik Innowacyjnych Emag | Method and system for measuring relative changes in stress concentration in front of a longwall |
| CN105765409B (en) * | 2014-10-30 | 2019-07-12 | 伊迈格创新技术学院 | For measuring the method and system for the opposite variation that the stress in front of longwell is concentrated |
| CN105765409A (en) * | 2014-10-30 | 2016-07-13 | 伊迈格创新技术学院 | Method and system for measuring relative changes in stress concentration in front of a longwall |
| CN105765408A (en) * | 2014-10-30 | 2016-07-13 | 伊迈格创新技术学院 | Method and system for analysis of geological structure and relative changes in stress in the layers located above the workings of underground mine |
| CN105137475A (en) * | 2015-09-17 | 2015-12-09 | 中煤科工集团西安研究院有限公司 | Belt conveyor-based coal mine working face real-time detection system and method |
| CN105604557A (en) * | 2015-12-30 | 2016-05-25 | 福建工程学院 | Shield construction boulder detection method based on seismic CT |
| CN106772595A (en) * | 2016-12-05 | 2017-05-31 | 中国矿业大学 | A kind of method that detonator time delay is eliminated in shock wave Velocity Inversion for colliery |
| CN106772597A (en) * | 2016-12-12 | 2017-05-31 | 中国矿业大学 | Take man-made explosion as the method for vibration signal inverting coal mine work area stress distribution |
| CN106597538A (en) * | 2016-12-14 | 2017-04-26 | 中国电建集团贵阳勘测设计研究院有限公司 | Seismic wave CT imaging method between holes |
| CN107741459A (en) * | 2017-11-14 | 2018-02-27 | 中国电建集团贵阳勘测设计研究院有限公司 | Utilize the method and device of sonic tomography technology detection lithologic anomalous body between hole |
| CN110374584A (en) * | 2019-06-19 | 2019-10-25 | 中国矿业大学 | A kind of tunnel relaxation zone and the area visualization detection method that leaks out that drills |
| CN110196281A (en) * | 2019-06-25 | 2019-09-03 | 石家庄铁道大学 | A kind of detection method, system and the terminal device of signal wave transmission velocity of wave |
| CN112305601A (en) * | 2019-07-31 | 2021-02-02 | 中国石油化工股份有限公司 | Seismic exploration acquisition excitation well design method based on chromatographic inversion |
| CN112305601B (en) * | 2019-07-31 | 2024-05-17 | 中国石油化工股份有限公司 | Design method of seismic exploration acquisition excitation well based on tomographic inversion |
| CN110748341A (en) * | 2019-09-24 | 2020-02-04 | 河南理工大学 | Method for detecting influence radius of controllable seismic source based on carbon dioxide blasting |
| CN110954961A (en) * | 2019-11-22 | 2020-04-03 | 山西晋煤集团技术研究院有限责任公司 | Large-sector mine working face radio wave penetration system and method |
| CN111413735A (en) * | 2020-05-11 | 2020-07-14 | 安徽理工大学 | Coal face rapid earthquake transmission chromatography method capable of simultaneously exciting multiple seismic sources |
| CN111413735B (en) * | 2020-05-11 | 2022-08-26 | 安徽理工大学 | Coal face rapid earthquake transmission chromatography method capable of simultaneously exciting multiple seismic sources |
| CN112433245A (en) * | 2020-11-04 | 2021-03-02 | 陕西彬长孟村矿业有限公司 | Coal mine fault structure prediction method |
| CN112433245B (en) * | 2020-11-04 | 2024-03-22 | 陕西彬长孟村矿业有限公司 | Coal mine fault structure prediction and forecast method |
| CN112415577A (en) * | 2020-11-24 | 2021-02-26 | 中国矿业大学(北京) | Method and system for embedding detector under karst landform |
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Open date: 20091118 |