CN104199110A - Method for channel wave earthquake stereoscopic advanced detection during underground coal mine support - Google Patents
Method for channel wave earthquake stereoscopic advanced detection during underground coal mine support Download PDFInfo
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- CN104199110A CN104199110A CN201410450813.0A CN201410450813A CN104199110A CN 104199110 A CN104199110 A CN 104199110A CN 201410450813 A CN201410450813 A CN 201410450813A CN 104199110 A CN104199110 A CN 104199110A
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Abstract
The invention discloses a method for channel wave earthquake stereoscopic advanced detection during underground coal mine support, and relates to the technical field of underground tunneling geological advanced detection. The method includes following steps: 1, vibration produced by a roofbolter bit in rock breaking during roadway support is used as a point focus, and the roofbolter bit operates on left and right sides of a roadway and on a coal seam roof in sequence, so that small-dot-pitch focus stereoscopic stimulation is achieved; 2, detectors are arranged on the top plate and the bottom plate and on the left and right sides of the roadway at a close range, or the detectors are arranged on the single side of the roadway, and the detectors are connected with a channel wave seismometer through an acquisition station and a data transmission line; 3, an earthquake wave signal stimulated by the roofbolter bit in rock breaking runs into a geologic body surface and then goes through refraction, scattering and wave-type conversion, scattering and nonstop channel waves are received by the detectors and are transmitted to the channel wave seismometer, and then a detection result is provided after data processing; and 4, a tunneling plan is reasonably arranged based on the detection result. By the aid of the method, vibration produced by the roofbolter bit in rock breaking is used as the pint focus, operation is not interrupted, and meanwhile, the channel wave earthquake advanced detection is carried out.
Description
Technical field
The present invention relates to driving geology advanced detection technology field, down-hole.
Background technology
In prior art, the method for carrying out forward probe mainly contains TSP(Tunnel SeismicPrediction) and mutation method, loose stratum etc.
TSP is the seismic event forward probe method of relatively commonly using at Tunnel prediction, but the reflection due to different directions in the restriction of observation condition and rock mass, make it running into very large difficulty aspect explanation and differentiation, it is too high that import equipment disposable dropped into the cost that ambassador's the method implements forward probe, and practical application has certain limitation.Its disadvantage is to quit work in construction period, blows out earthquake-wave-exciting.Quit work and can impact produce, and utilize explosive source, the construction of big gun hole is complicated, has certain security risk, and the seismic event that excites of explosive source be single direction be main, quantity of information is few, wave field imaging is affected by noise larger, effect is poor.
Loose stratum (being also seismic reflection method of high frequency), its essence is vertical seismic wave reflection method, the method adopts minimum offset distance on tunnel tunnel face, single-point acquiring high-frequency seism reflected signal forms serial section, by cruciform recording geometry and broadband laser pulse reception technique, position and the occurrence of forecast front of tunnel heading tomography and other geological interface.Loose stratum advantage is that resolution is higher, and its shortcoming need take face, and impact is produced.
When above advanced detection technology is surveyed under coal mine, detection range is near, weak effect, and abnormal ranges is many.
Seam seismic exploration be utilize the guided wave excite and to propagate in coal seam (as low speed waveguide), to detect a kind of new geophysical method of Discontinuity of coal seam.The bulk wave exciting in coal seam comprises compressional wave and shear wave, the portion of energy exciting is because the multiple total reflection of top bottom boundary is confined in the rock of coal seam and vicinity thereof (abbreviation coal groove), not to country rock radiation, stack, constructive interference mutually in coal seam, form strong interference disturbance, i.e. a slot wave.It is take coal seam and along coal seam, outwards propagates as waveguide, so slot wave claims again seam-wave or guided wave.Existing slot wave seismic method, needs explosive shooting, relates to safety problem, and required personnel and department are numerous, coordinates inconvenience.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of three-dimensional forward probe method of the slot wave earthquake in Bracing Process under coal mine, it is strong that slot wave is propagated antijamming capability in coal seam, detection range is far away, investigative range is large, the vibration producing when roofbolter drill bit breaks rock while adopting roadway support operation is as single source, left in tunnel, right side and roof excite successively, form the three-dimensional network that excites, realizing focus point excites apart from solid, excite often, can fully obtain space wave field information, raising is to the place ahead positioning precision of plastid poorly, interruption operation not, can facilitate and predict in time coal seam, the place ahead pressure, structure situation, carry out down-hole status monitoring, and then reasonably arrange driving to plan, revise arrangement and method for construction, effectively control the generation of Mine Geological Hazard.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of three-dimensional forward probe method of slot wave earthquake under coal mine in Bracing Process, comprises the steps:
(1) vibration producing while utilizing the broken rock of roofbolter drill bit in roadway support process is as single source, and in tunnel, left and right side and roof carry out operation to roofbolter successively, realize point and excite apart from focus solid;
(2) top board, base plate, left side and the right side in tunnel closely arranges wave detector, or travelling trader working on his own layout wave detector, and each wave detector is connected on in-seam seismograph by acquisition station and data line, forms a detection system;
(3) seismic signal exciting during the broken rock of roofbolter drill bit reflects while running into geologic body interface, scattering and waveform transformation, scattering slot wave and through slot wave are wherein received by above-mentioned wave detector, and pass to in-seam seismograph, through data processing with after analyzing, provide forward probe result;
(4) in conjunction with forward probe result, for Roadway Leading Prospecting provides reliable basis, so that the plan of arranged rational driving, revise arrangement and method for construction, take corresponding preventive measure, control the generation of Mine Geological Hazard.
Preferably, between focus, be spaced apart 0.8～1m, in tunnel, left and right side and roof excite successively, form the three-dimensional network that excites, and fully to obtain space wave field information, improve the place ahead positioning precision of plastid poorly.
Preferably, between wave detector, be spaced apart 2～10m, a plurality of wave detectors form the monitoring network to the place ahead, tunnel, from the nearest wave detector of roofbolter drill bit apart from roofbolter drill bit 5m～10m, from roofbolter drill bit wave detector farthest, apart from roofbolter drill bit 30m～40m, avoid the appearance of signal to noise ratio (S/N ratio) situation on the low side.
Preferably, wave detector is according to face timbering progress, adopt laddering alternately move mode to move to driving supporting direction, realization is monitored continuously to the structure situation of the place ahead, tunnel, the place ahead, coal seam and periphery, by the coal seam situation to the place ahead, tunnel, monitor, analyze, collect structural anormaly and the pressure anomaly of supporting the place ahead and periphery, and constantly analyze, correct, in Bracing Process, obtain the information in abnormal location in the place ahead, coal seam and getting working face.
Principle of work of the present invention is as follows:
In roadway support process, during supporting operation, impact coal during the broken rock of roofbolter drill bit, rock produces powerful seismic signal.According to Huygens-Frensel principle and Fermat principle, while there is the interface of two kinds of different mediums in seismic propagation path, wave propagation by reflecting, scattering and waveform transformation.When running into geologic body interface, the seismic signal exciting partly there is scattering, part is propagated to rear, tunnel along rib, the wave detector that this scattered information is installed in tunnel rib receives, and passes to in-seam seismograph, through data processing with after analyzing, can provide forward probe result.
The beneficial effect that adopts technique scheme to produce is:
(1) vibration producing when the present invention utilizes the broken rock of roofbolter drill bit in roadway support process is as single source, in roadway support process, carry out the three-dimensional forward probe of slot wave earthquake, do not affect roadway support work, and can predict in time coal seam, the place ahead pressure, structure situation, carry out down-hole status monitoring, effectively control the generation of Mine Geological Hazard.
(2) vibration producing when roofbolter drill bit breaks rock is a kind of very reliable multiple focus, in tunnel, left and right side and roof carry out operation to roofbolter successively, excite successively, realizing point excites apart from focus solid, form the three-dimensional network that excites, contain much information, effective, can fully obtain space wave field information, improve the place ahead positioning precision of plastid poorly.
(3) the present invention adopts the three-dimensional forward probe method of slot wave earthquake, the three-dimensional distribution point in source location is apart from exciting, wave detector position closely three-dimensional distribution receives, fully to obtain space wave field information, raising is to the place ahead positioning precision of plastid poorly, and antijamming capability is strong, and detection range is far away, detection blind area is little, and solid space forecast distance can reach 60～90m.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation;
Fig. 1 is the Technology Roadmap of the embodiment of the present invention 1;
Fig. 2 is the three-dimensional forward probe schematic diagram of the slot wave earthquake in Bracing Process of the present invention;
In figure, 1, the left side in tunnel; 2, the right side in tunnel; 3, wave detector; 4, focus; 5, tomography.
Embodiment
Embodiment 1
The three-dimensional forward probe method of slot wave earthquake under coal mine in Bracing Process, comprises the steps:
One, technology path: as shown in Figure 1.
The three-dimensional forward probe method of slot wave earthquake in mine support process is mainly the research to seismic technology wave field characteristics in Bracing Process, comprise the data acquisition in the Bracing Process of down-hole, the signal that the seismic event exciting while being mainly the broken rock of reception roofbolter drill bit in the gatherer process of down-hole is propagated along coal seam; Collection completes laggard row data processing, is mainly that the wavefield signals to gathering is identified and extracted, and special interference wave is rejected, and slot wave signal is carried out to cross correlation process, wave field separation, and attributive analysis, determines source location, the line displacement imaging processing of going forward side by side.
Two, technical scheme:
(1) vibration producing while utilizing the broken rock of roofbolter drill bit in roadway support process is as single source, in tunnel, left and right side and roof carry out operation to roofbolter successively, excite successively, between single source, be spaced apart 0.8～1m, realizing point excites apart from focus solid, form the three-dimensional network that excites, can fully obtain space wave field information like this, improve the place ahead positioning precision of plastid poorly.
(2) top board, base plate, left side and the right side in tunnel closely arranges wave detector, or travelling trader working on his own layout wave detector, and each wave detector is connected on in-seam seismograph by acquisition station and data line, forms a monitoring system.
Between wave detector, be spaced apart 2～10m, a plurality of wave detectors form the monitoring network to driving the place ahead, and monitoring, range of control can covering radius be to meet head in coal seam in 0～90m spatial dimension and coal seam around.
From the nearest wave detector of roofbolter drill bit, apart from roofbolter drill bit 5m～10m, from roofbolter drill bit wave detector farthest, apart from roofbolter drill bit 30m～40m, avoid the data signal to noise ratio (S/N ratio) that obtains on the low side.
According to face timbering progress, wave detector can adopt laddering alternately move mode to move to driving supporting direction, realization is monitored continuously to the structure situation of the place ahead, tunnel, the place ahead, coal seam and periphery, by the coal seam situation to the place ahead, tunnel, monitor, analyze, collect structural anormaly and the pressure anomaly of supporting the place ahead and periphery, and constantly analyze, correct, in Bracing Process, obtain the information in abnormal location in the place ahead, coal seam and getting working face.
(3) seismic signal exciting during the broken rock of roofbolter drill bit reflects while running into geologic body interface, scattering and waveform transformation, scattering slot wave and through slot wave are wherein received (as shown in Figure 2) by above-mentioned wave detector, and pass to in-seam seismograph, through data processing with after analyzing, provide forward probe result.
(4) in conjunction with forward probe result, for Roadway Leading Prospecting provides reliable basis, and then reasonably arrange driving plan, correction arrangement and method for construction, take corresponding preventive measure, control the generation of Mine Geological Hazard.
Claims (4)
1. the three-dimensional forward probe method of the slot wave earthquake in Bracing Process under coal mine, is characterized in that comprising the steps:
(1) vibration producing while utilizing the broken rock of roofbolter drill bit in roadway support process is as single source, and in tunnel, left and right side and roof carry out operation to roofbolter successively, realize point and excite apart from focus solid;
(2) top board, base plate, left side and the right side in tunnel closely arranges wave detector, or travelling trader working on his own layout wave detector, and each wave detector is connected on in-seam seismograph by acquisition station and data line, forms a detection system;
(3) seismic signal exciting during the broken rock of roofbolter drill bit reflects while running into geologic body interface, scattering and waveform transformation, scattering slot wave and through slot wave are wherein received by above-mentioned wave detector, and pass to in-seam seismograph, through data processing with after analyzing, provide forward probe result;
(4) in conjunction with forward probe result, for Roadway Leading Prospecting provides reliable basis, so that the plan of arranged rational driving, revise arrangement and method for construction, take corresponding preventive measure, control the generation of Mine Geological Hazard.
2. the three-dimensional forward probe method of the slot wave earthquake in Bracing Process under a kind of coal mine according to claim 1, it is characterized in that the 0.8～1m that is spaced apart between described single source, in tunnel, left and right side and roof excite successively, form the three-dimensional network that excites, fully to obtain space wave field information, improve the place ahead positioning precision of plastid poorly.
3. the three-dimensional forward probe method of the slot wave earthquake in Bracing Process under a kind of coal mine according to claim 1, it is characterized in that the 2～10m that is spaced apart between described wave detector, a plurality of wave detectors form the monitoring network to the place ahead, tunnel, from the nearest wave detector of roofbolter drill bit apart from roofbolter drill bit 5m～10m, from roofbolter drill bit wave detector farthest, apart from roofbolter drill bit 30m～40m, avoid the appearance of signal to noise ratio (S/N ratio) situation on the low side.
4. the three-dimensional forward probe method of the slot wave earthquake in Bracing Process under a kind of coal mine according to claim 1, it is characterized in that described wave detector is according to face timbering progress, adopt laddering alternately move mode to move to driving supporting direction, realization is to the place ahead, tunnel, the structure situation of the place ahead, coal seam and periphery is monitored continuously, by the coal seam situation to the place ahead, tunnel, monitor, analyze, collect structural anormaly and the pressure anomaly of supporting the place ahead and periphery, and constantly analyze, correct, in Bracing Process, obtain the information in abnormal location in the place ahead, coal seam and getting working face.
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Cited By (5)
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| CN104678428A (en) * | 2015-03-11 | 2015-06-03 | 山东大学 | Tunnel boring machine rock breaking seismic source and active source three-dimensional seismic combined advanced detection system |
| CN105607128A (en) * | 2015-12-31 | 2016-05-25 | 中铁第四勘察设计院集团有限公司 | Geological fault detection method under hard and soft interbedded geological condition |
| CN106526673A (en) * | 2016-11-10 | 2017-03-22 | 淮南矿业(集团)有限责任公司 | Fault testing method for reflection method channel wave seismic exploration roadway advanced detection |
| CN108121010A (en) * | 2017-12-21 | 2018-06-05 | 中煤科工集团西安研究院有限公司 | Based on the united underground dead face slot wave forward probe method and system in hole lane |
| CN113203533A (en) * | 2021-04-06 | 2021-08-03 | 淮北市平远软岩支护工程技术有限公司 | Method and equipment for verifying support body of roadway with large rock burst |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678428A (en) * | 2015-03-11 | 2015-06-03 | 山东大学 | Tunnel boring machine rock breaking seismic source and active source three-dimensional seismic combined advanced detection system |
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| CN106526673A (en) * | 2016-11-10 | 2017-03-22 | 淮南矿业(集团)有限责任公司 | Fault testing method for reflection method channel wave seismic exploration roadway advanced detection |
| CN106526673B (en) * | 2016-11-10 | 2018-06-08 | 淮南矿业(集团)有限责任公司 | A kind of bounce technique seam seismic exploration Roadway Leading Prospecting tomography test method |
| CN108121010A (en) * | 2017-12-21 | 2018-06-05 | 中煤科工集团西安研究院有限公司 | Based on the united underground dead face slot wave forward probe method and system in hole lane |
| CN113203533A (en) * | 2021-04-06 | 2021-08-03 | 淮北市平远软岩支护工程技术有限公司 | Method and equipment for verifying support body of roadway with large rock burst |
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Application publication date: 20141210 |