CN109521467A - A kind of forward probe method based on projecting coal bed tunnel - Google Patents
A kind of forward probe method based on projecting coal bed tunnel Download PDFInfo
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- CN109521467A CN109521467A CN201811417790.8A CN201811417790A CN109521467A CN 109521467 A CN109521467 A CN 109521467A CN 201811417790 A CN201811417790 A CN 201811417790A CN 109521467 A CN109521467 A CN 109521467A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
- G01V1/288—Event detection in seismic signals, e.g. microseismics
Abstract
The invention discloses a kind of forward probe methods based on projecting coal bed tunnel, comprising: the preliminary seismic wave propagation speed for determining monitoring region carries out tunnel hammering to monitoring region using active focus；The seismic signal for obtaining the hammering of active focus, is corrected preliminary seismic wave propagation speed according to seismic signal, obtains seismic target earthquakes velocity of wave propagation；Event detection is carried out to seismic signal and obtains coal and rock micro rupture signal event；Coal and rock micro rupture signal event is manually finely tuned according to seismic target earthquakes velocity of wave propagation, obtains fine adjustment signal event；Location Calculation is carried out to fine adjustment signal event, obtains fine adjustment signal state event location result；Focal mechanism solution is carried out to fine adjustment signal event, obtains coal and rock micro rupture Forming Mechanism；Double difference imaging is carried out to fine adjustment signal event, inverting obtains velocity field；According to fine adjustment signal state event location result, coal and rock micro rupture Forming Mechanism, velocity field portray tunnel meet head on front unfavorable geologic body Distribution Characteristics.
Description
Technical field
The present invention relates to technical field of mine safety more particularly to a kind of forward probe sides based on projecting coal bed tunnel
Method.
Background technique
Currently, projecting coal bed Roadway Leading Prospecting has probing method, Electromagnetic Wave Method and traditional seismic wave method.Probing method is in tunnel
Meeting head on, front is direct to punch, and checks formation lithology, gas enrichment condition, construction etc.；Electromagnetic Wave Method is based on rocks such as resistivity
Electrical properties analyze the apparent resistivity etc. of country rock, to judge the geological conditions near measuring point；Traditional seismic wave method is anti-based on earthquake
Ejected wave information analyzes tunnel geological condition.
Probing method search coverage is limited, and equipment is heavy in work progress, and operating expenses is high, when occupying normal cyclic construction
Between it is long, primary effectively detecting limitation is more, and frequent operation is time-consuming and laborious.Electromagnetic Wave Method is dry by live stray electrical current and electrical equipment
Disturb larger, there are cutting coal machines in digging laneway, therefore, in detection process can generate more geologic anomaly detection false.Tradition
Seismic wave method is mainly based upon Three Dimensional Ground earthquake and tunnel earthquake forward probe, is seismic reflectuon seismic noise.Conventional three-dimensional earthquake
It is at high cost, and by ground surface environment and projecting coal bed buried depth influenced that detection accuracy is caused to reduce, it is difficult to effectively ground in front of detection tunnel
Matter anomalous body.
Summary of the invention
Technical problems based on background technology, the invention proposes a kind of forward probes based on projecting coal bed tunnel
Method；
A kind of forward probe method based on projecting coal bed tunnel proposed by the present invention, comprising:
S1, the preliminary seismic wave propagation speed that monitoring region is determined according to monitoring region geologic information；
S2, tunnel hammering is carried out to monitoring region using active focus；
S3, the seismic signal that the hammering of active focus is obtained by microseismic sensors, and according to seismic signal to preliminary
Seismic wave propagation speed is corrected, and determines the seismic target earthquakes velocity of wave propagation in monitoring region；
S4, signal identification and pretreatment are carried out to seismic signal, obtains pre-processed seismic wave signal；
S5, event detection is carried out to pre-processed seismic wave signal, obtains coal and rock micro rupture signal event；
S6, the longitudinal wave positioned according to seismic target earthquakes velocity of wave propagation to coal and rock micro rupture signal event, shear wave carry out people
Work fine tuning obtains fine tuning coal and rock micro rupture signal event；
S7, positioning mode and seismic target earthquakes when being walked by the positioning of collapsing grid search, the double difference earthquake comprising azimuth information
Velocity of wave propagation carries out location Calculation to fine tuning coal and rock micro rupture signal event, obtains the positioning of coal and rock micro rupture signal event
As a result；
S8, focal mechanism solution is carried out to fine tuning coal and rock micro rupture signal event, obtains coal and rock micro rupture Forming Mechanism；
S9, double difference imaging calculating is carried out to fine tuning coal and rock micro rupture signal event, inverting obtains velocity field；
S10, it is portrayed according to coal and rock micro rupture signal event positioning result, coal and rock micro rupture Forming Mechanism, velocity field
Tunnel meet head on front unfavorable geologic body Distribution Characteristics.
Preferably, step S4 is specifically included:
Signal identification is carried out to seismic signal；
Direct current is carried out to the seismic signal of identification and inclination, bandpass filtering, trap and addition of waveforms are handled, is obtained pre-
Handle seismic signal.
Preferably, step S5 is specifically included:
By carrying out event detection to pre-processed seismic wave signal with STA algorithm and/or LTA algorithm, it is micro- to obtain coal and rock
Destruction signals event.
In the present invention, with the working face of digging laneway forward probe is carried out to tunnel front of meeting head on, avoids probing method
Single hole detection, and on the basis of Electromagnetic Wave Method, traditional seismic wave method Roadway Leading Prospecting, the working face for increasing digging laneway is super
Preceding detection；It is not influenced by live metal equipment, can be used safely in projecting coal bed tunnel, and can be with tunnelling production and construction
It carries out simultaneously, does not influence project progress；It is imaged, is detected in front of tunnel and driving face by state event location and formation velocity field
Geologic anomaly situation；Whole day real-time data acquisition, processing, analysis in 24 hours, are compared to probing method, Electromagnetic Wave Method and tradition
The interval forward probe of seismic wave method has with the real-time forward probe advantage of pick.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the forward probe method based on projecting coal bed tunnel proposed by the present invention.
Specific embodiment
Referring to Fig.1, a kind of forward probe method based on projecting coal bed tunnel proposed by the present invention, comprising:
Step S1 determines the preliminary seismic wave propagation speed in monitoring region according to monitoring region geologic information.
In concrete scheme, since microseismic event space orientation is related to coal and rock seismic wave propagation speed, for monitoring
Region (zone of ignorance) its seismic wave propagation speed be it is unknown, therefore, can only by monitoring region where big region (including
Monitor region) the geologic information information of interior coal and rock, it goes to determine monitoring region coal and rock seismic wave propagation speed, is microseismic event
Space orientation provides premise.
Step S2 carries out tunnel hammering to monitoring region using active focus.
Step S3 obtains the seismic signal of active focus hammering by microseismic sensors, and according to seismic signal pair
Preliminary seismic wave propagation speed is corrected, and determines the seismic target earthquakes velocity of wave propagation in monitoring region.
It is a comparative basis according to the seismic wave propagation speed that geologic information obtains, for micro- in concrete scheme
For shaking event space positioning accuracy request, positioning accuracy is not high enough, and therefore, it is necessary to be carried out using active focus to monitoring region
Tunnel hammering constantly calculates, correction, optimizes the seismic wave propagation speed obtained according to geologic information, makes the space of microseismic event
Positioning accuracy is higher.
Step S4 carries out signal identification and pretreatment to seismic signal, obtains pre-processed seismic wave signal.
This step specifically includes: carrying out signal identification to seismic signal；Direct current is carried out to the seismic signal of identification
With the processing of inclination, bandpass filtering, trap and addition of waveforms, pre-processed seismic wave signal is obtained.
In concrete scheme, the quality (signal-to-noise ratio for improving seismic signal) of seismic signal is improved, because of detection system
System will receive the movable influence of live coal production, such as noise jamming during acquiring, storing original seismic signal
Etc. can be doped in seismic signal, a complex wave is formed, therefore, passes through above-mentioned processing, rejects produced on-site moving obstacle
Signal improves the quality of original seismic signal.
Step S5 carries out event detection to pre-processed seismic wave signal, obtains coal and rock micro rupture signal event.
This step specifically includes: by carrying out event inspection to pre-processed seismic wave signal with STA algorithm and/or LTA algorithm
It surveys, obtains coal and rock micro rupture signal event.
Step S6, the longitudinal wave that coal and rock micro rupture signal event is positioned according to seismic target earthquakes velocity of wave propagation, shear wave into
The fine tuning of pedestrian's work obtains fine tuning coal and rock micro rupture signal event.
Step S7, positioning mode and target when being walked by the positioning of collapsing grid search, the double difference earthquake comprising azimuth information
Seismic wave propagation speed carries out location Calculation to fine tuning coal and rock micro rupture signal event, obtains coal and rock micro rupture signal event
Positioning result.
In concrete scheme, positioning mode when being walked based on the positioning of collapsing grid search, the double difference earthquake comprising azimuth information
And seismic target earthquakes velocity of wave propagation carries out location Calculation to fine tuning coal and rock micro rupture signal event, and microseismic event can be made empty
Between positioning accuracy it is higher.
Step S8 carries out focal mechanism solution to fine tuning coal and rock micro rupture signal event, obtains coal and rock micro rupture and formed
Mechanism.
In concrete scheme, according to the focal mechanism solution of microseismic event, the tearing type of coal and rock is judged, it is bad to judge
Geologic body is prepared.
Step S9 carries out double difference imaging to fine tuning coal and rock micro rupture signal event and calculates, and inverting obtains velocity field.
Step S10, according to coal and rock micro rupture signal event positioning result, coal and rock micro rupture Forming Mechanism, velocity field
Portray tunnel meet head on front unfavorable geologic body Distribution Characteristics.
In concrete scheme, if projecting coal bed tunnel meets head on to contain unfavorable geologic body in front and driving face, including
Gas enrichment region, karst collapse col umn, tomography, rich water band etc., as cutting coal machine cuts the disturbance that coal and rock is formed during tunnelling,
Tunnel meet head on front coal and rock original original stress equilibrium state will receive destructions, so as to cause coal and rock occur rupture in the form of elastic wave
To external radiation, tunnel rear area work face two sides digging laneway is laid in after unfavorable geologic body in front of tunnel in communication process
Interior coal mine carries out elastic wave real-time reception (whole day 24 hours) with microseismic sensors, is based on artificial finely positioning, formation velocity
Field imaging realizes that projecting coal bed tunnel with pick forward probe, instructs safety of coal mines to construct.
In present embodiment, with the working face of digging laneway forward probe is carried out to tunnel front of meeting head on, avoids probing
The single hole of method detects, and on the basis of Electromagnetic Wave Method, traditional seismic wave method Roadway Leading Prospecting, increases the work of digging laneway
Face forward probe；It is not influenced by live metal equipment, can be used safely in projecting coal bed tunnel, and can be produced with tunnelling
It constructs while carrying out, do not influence project progress；It is imaged by state event location and formation velocity field, detects tunnel and driving face
The geologic anomaly situation in front；Whole day real-time data acquisition, processing, analysis in 24 hours, be compared to probing method, Electromagnetic Wave Method and
The interval forward probe of traditional seismic wave method has with the real-time forward probe advantage of pick.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (3)
1. a kind of forward probe method based on projecting coal bed tunnel characterized by comprising
S1, the preliminary seismic wave propagation speed that monitoring region is determined according to monitoring region geologic information；
S2, tunnel hammering is carried out to monitoring region using active focus；
S3, the seismic signal that the hammering of active focus is obtained by microseismic sensors, and according to seismic signal to preliminary earthquake
Velocity of wave propagation is corrected, and determines the seismic target earthquakes velocity of wave propagation in monitoring region；
S4, signal identification and pretreatment are carried out to seismic signal, obtains pre-processed seismic wave signal；
S5, event detection is carried out to pre-processed seismic wave signal, obtains coal and rock micro rupture signal event；
S6, the longitudinal wave positioned according to seismic target earthquakes velocity of wave propagation to coal and rock micro rupture signal event, shear wave carry out artificial micro-
It adjusts, obtains fine tuning coal and rock micro rupture signal event；
S7, by collapsing grid search positioning, the double difference earthquake comprising azimuth information walk when positioning mode and seismic target earthquakes wave pass
It broadcasts speed and location Calculation is carried out to fine tuning coal and rock micro rupture signal event, obtain coal and rock micro rupture signal event positioning knot
Fruit；
S8, focal mechanism solution is carried out to fine tuning coal and rock micro rupture signal event, obtains coal and rock micro rupture Forming Mechanism；
S9, double difference imaging calculating is carried out to fine tuning coal and rock micro rupture signal event, inverting obtains velocity field；
S10, tunnel is portrayed according to coal and rock micro rupture signal event positioning result, coal and rock micro rupture Forming Mechanism, velocity field
The Distribution Characteristics of unfavorable geologic body in front of meeting head on.
2. the forward probe method according to claim 1 based on projecting coal bed tunnel, which is characterized in that step S4, tool
Body includes:
Signal identification is carried out to seismic signal；
Direct current is carried out to the seismic signal of identification and inclination, bandpass filtering, trap and addition of waveforms are handled, is pre-processed
Seismic signal.
3. the forward probe method according to claim 1 based on projecting coal bed tunnel, which is characterized in that step S5, tool
Body includes:
By carrying out event detection to pre-processed seismic wave signal with STA algorithm and/or LTA algorithm, coal and rock micro rupture is obtained
Signal event.
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| CN111636859A (en) * | 2020-07-09 | 2020-09-08 | 中煤科工集团重庆研究院有限公司 | Coal rock while-drilling self-identification method based on micro-fracture wave detection |
| CN117055115A (en) * | 2023-10-11 | 2023-11-14 | 煤炭科学研究总院有限公司 | Method, device, equipment and medium for detecting abnormal region of coal rock mass structure |
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Application publication date: 20190326 |