CN213957645U - Small-structure advanced detection system based on power of roadheader - Google Patents

Abstract

The utility model provides a little structure advanced detection system based on combine and dig quick-witted power, including being fixed in two groups in tunnel and combine the host computer of digging three detection unit on the machine and connecting three detection unit, every detection unit includes a plurality of signal receiver and connects a plurality of signal receiver's wireless base station, the host computer respectively with every wireless base station communication connection, signal receiver can acquire the acceleration of shock wave. The utility model has the advantages that: the detection units on the left side and the right side generate offset apertures, so that the speed analysis and subsequent offset superposition in front of tunneling are facilitated, the small structure in front of the tunneling position can be effectively positioned and analyzed, a worker does not need to stop the machine for operation, the small structure in front is continuously tracked and probed, secondary accidents caused by a seismic source generated by blasting are avoided, and fine superposition positioning can be performed on the small structure in front of tunneling through forward movement of the fully-mechanized excavating machine.

Description

Small-structure advanced detection system based on power of roadheader

Technical Field

The utility model relates to a coal mine tunnel geophysical prospecting technical field especially relates to a little structure advanced detection system based on combine machine of digging power.

Background

The conventional three-dimensional seismic exploration of coal fields and the mine geophysical prospecting have limited detection precision, small structures such as small faults, collapse columns and the like are often missed, the safety production of coal mines is seriously influenced due to the abnormal small structures in the coal mine tunneling process, and the fine detection cost and the effect are poor when the coal mine tunneling system is matched with drilling. At present, the conventional seismic exploration precision is often related to the arrangement of an observation system, the conventional seismic mine geophysical prospecting method has the precision of 5-10m, has poor response to small structures below 5m, and does not have the capability of advanced prediction.

At present, the reflected wave earthquake method advanced detection mainly generates vibration through drilling blasting, collects vibration echoes for analysis to realize advanced detection, however, the method has the following problems that (1) explosives are used as a seismic source, potential safety hazards exist under a coal mine, particularly gas protrudes out of a mine, and a channel for gas and water inrush leakage is possibly formed by drilling, so that accidents are caused; (2) the drilling blasting method has low efficiency, and blasting is performed to excite seismic waves to acquire data under the condition of ensuring safety, so that the excavation construction efficiency of a mine is influenced; (3) the detection precision of blasting vibration is 5m or more, the small structure abnormity is difficult to be accurately positioned, the maximum detectable distance of one-time advance detection in the traditional method is not more than 150m, the deeper the detection distance is, the precision is easy to be influenced, and continuous tracking advance detection consistent with the roadway tunneling progress cannot be completely realized.

The invention patent application with publication number CN106772557A discloses a method for detecting geological structures in all directions of a coal mine driving tunnel by using a following driving signal, wherein a detector is arranged in the tunnel to collect seismic waves, and the vibration of a driving machine or a coal mining machine during working is used as a seismic source to advance detect a mine, but the method still cannot meet the precision requirement of small structure detection.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a detection precision is higher in order to satisfy the little structure detection requirement along with digging the detection system is provided.

The utility model discloses a solve above-mentioned technical problem through following technical scheme: a small-structure advanced detection system based on power of a comprehensive excavator comprises three detection units and a host computer, wherein the three detection units are fixed on two sides of a roadway and the comprehensive excavator, the host computer is connected with the three detection units, each detection unit comprises a plurality of signal receivers and a wireless base station connected with the plurality of signal receivers, the host computer is in communication connection with each wireless base station, and the signal receivers can acquire acceleration of shock waves.

The utility model jointly observes the echo seismic source position based on the sensors at the two sides of the tunnel and the three positions of the development machine, generates the deviation aperture based on the detection units at the left side and the right side, is beneficial to speed analysis and subsequent deviation superposition in front of development, can effectively carry out positioning analysis on the small structure in front of the development position, continuously tracks and explores the small structure abnormity in front along with the increase of development depth in work, does not need to be shut down for operation, does not influence development work, uses the vibration generated by the development machine work as the seismic source, avoids using the secondary accident caused by the seismic source generated by blasting, by means of forward movement of the fully-mechanized excavating machine, a plurality of position detection results can be jointly analyzed, positioning positions are overlapped and identified, fine overlapping positioning of small structures in front of excavation is achieved, side wall and head-on joint scattering offset overlapping imaging can also be carried out, and surrounding rock loosening conditions near the head-on are detected.

Preferably, the signal receivers of the detecting units on the lane sides are arranged and fixed on the lane sides along the tunneling direction.

Preferably, the signal receiver on the fully-mechanized mining machine is fixedly coupled with the fully-mechanized mining machine.

Preferably, the signal receiver comprises an acceleration sensor and a housing for packaging the acceleration sensor, and a coupling medium is filled between the housing and the acceleration sensor.

Preferably, the shell is provided with a threaded hole, the threaded hole is fixedly connected with a tail cone or a base in a threaded manner, the tail cone can be inserted and fixed on a roadway side, and the base can be fixedly connected to the roadheader.

Preferably, the caudal vertebra is a uniform conical structure.

Preferably, the base is directly contacted, coupled and fixed with the fully-mechanized excavating machine.

Preferably, the acceleration sensor has three mutually perpendicular sensitivity directions.

The utility model provides a little structure advanced detection system based on combine and dig quick-witted power's advantage lies in: the method comprises the steps that the echo seismic source position is jointly observed by sensors based on two sides of a roadway and three positions of a tunneling machine, the detection units based on the left side and the right side generate offset apertures, the speed analysis and the subsequent offset superposition in the front of tunneling are facilitated, the small structure in the front of the tunneling position can be effectively positioned and analyzed, the small structure abnormity in the front is continuously tracked and probed along with the increase of the tunneling depth in the work, the shutdown operation is not needed, the tunneling work is not influenced, the time-space domain superposition of the target geological abnormity is formed, the missing detection is avoided, and the accurate abnormity probing of the small structure in the front of the tunneling roadway is ensured; the vibration generated by the working of the heading machine is used as a seismic source, secondary accidents caused by the seismic source generated by blasting are avoided, the detection results of a plurality of positions can be jointly analyzed by the forward movement of the comprehensive heading machine, the positioning positions are superposed and identified, the fine superposition positioning of small structures in front of heading is realized, the side wall and head-on joint scattering offset superposition imaging can be carried out, and the loose situation of surrounding rocks near the head is detected. The acceleration sensor is wrapped in the shell by using the coupling medium, and the shell is fixed with the roadway side or the fully-mechanized excavating machine by the tail cone or the base, so that the loss in the seismic wave transmission process is reduced, and the positioning precision is improved; the acceleration sensor has high sensitivity and wide frequency band range, improves the signal-to-noise ratio of seismic data and has high detection precision.

Drawings

Fig. 1 is a schematic view of a small-structure advanced detection system based on the power of a fully-mechanized excavating machine according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a signal receiver of a fully-mechanized mining machine power-based small-structure advanced detection system according to an embodiment of the present invention;

3-7 are seismic wave data acquired using the fully-mechanized mining power-based small-structure advanced detection system provided by the embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described below in detail and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the embodiment provides a small-structure advanced detection system based on power of a roadheader, which includes three detection units 1 fixed on two sides of a roadway and the roadheader, and a host 2 connected to the three detection units 1, each detection unit 1 includes a plurality of signal receivers 3 and wireless base stations 4 connected to the plurality of signal receivers 3, the host 2 is in communication connection with each wireless base station 4, and the signal receivers 3 can acquire acceleration of a vibration wave.

The detection system provided by the embodiment can jointly observe the positions of echo seismic sources based on sensors at two sides of a roadway and three positions of a heading machine, the detection units 1 based on the left side and the right side generate offset apertures, so that the speed analysis and the subsequent offset superposition in the front of the heading can be facilitated, the small structure in the front of the heading position can be effectively positioned and analyzed, the small structure in the front can be continuously tracked and explored along with the increase of the heading depth in the work, the shutdown operation is not needed, the heading work is not influenced, the vibration generated by the working of the heading machine is used as the seismic source, the secondary accident caused by the seismic source generated by blasting is avoided, the detection results at multiple positions can be jointly analyzed through the forward movement of the comprehensive heading machine, the positioning positions are superposed and identified, the fine superposition positioning of the small structure in the front of the heading can be realized, and the combined scattering, offset, superposition and imaging of the lateral side walls and the head-on the roadway can be carried out, and detecting the surrounding rock loosening condition near the head.

The working process of the detection system provided by the embodiment is as follows:

s1: arranging signal receivers 3 on the roadway and the comprehensive excavator as required, connecting the signal receivers 3 belonging to the same detection unit 1 to the same wireless base station 4, and transmitting data to the host 2 by the wireless base station 4 through a wireless communication technology to form a detection system;

s2: when the host 2 and the wireless base stations 4 are synchronized, the wireless base stations 4 are ensured to acquire seismic data simultaneously;

s3: effective seismic signal extraction, namely identifying effective elastic wave field characteristics under a power source of the fully-mechanized excavating machine according to main command actions and vibration and wave field signal characteristics of a cut coal body in the operation process of the fully-mechanized excavating machine, extracting and synthesizing effective seismic front reflected wave signals from a large number of pseudo-random signals according to intelligent algorithms such as denoising correlation superposition and the like, and completing conversion from a seismic source of the fully-mechanized excavating machine to an active explosive source;

s4: seismic data preprocessing, specifically including seismic data bad track elimination, null shift correction, digital filtering, bad track removal, noise removal and common frequency signal interference, and data signal-to-noise ratio improvement;

s5: acquiring reflected wave information in front of the roadway, and adopting a linear Radon transformation technology to separate up and down traveling waves according to the negative apparent velocity characteristic of a reflection time distance curve so as to extract the reflected wave information;

the separation of the up-down traveling wave and the preservation of the traveling wave (negative apparent velocity) in the data processing process essentially suppresses the information from the vertical direction of the measuring line and preserves the reflection information from the horizontal direction;

s6: and (3) depth migration processing and interface extraction, namely migrating and returning the reflected energy from the front medium to a space point under the condition of a given speed model, forming an interface position extraction map of geological anomaly in the front of tunneling, and dividing a small structure in the front of tunneling.

The specific data processing methods related to the above methods can be realized by using the prior art or simply modifying the prior art.

The data shown in fig. 3-7 can be obtained in the experiment, the seismic signal data is processed and analyzed, and advanced detection early warning analysis of the roadway can be realized.

Specifically, the signal receivers 3 of the detection units 1 on the two sides of the roadway are arranged and fixed on the roadway sides along the tunneling direction, and the signal receivers 3 on the comprehensive tunneling machine are coupled and fixed with the comprehensive tunneling machine, so that the vibration signals transmitted by the comprehensive tunneling machine are effectively acquired, and in the embodiment, the signal receivers 3 are coupled and fixed on the outer wall or the support of the comprehensive tunneling machine. Referring to fig. 2, the signal receiver 3 includes an acceleration sensor 31 and a housing 32 enclosing the acceleration sensor 31, and the housing 32 has a certain weight to improve the coupling effect and the signal-to-noise ratio; a coupling medium 33 is filled between the housing 32 and the acceleration sensor 31, and the coupling medium 33 is a hard rigid medium. The shell 32 is provided with a threaded hole (not shown), a tail cone 34 or a base 35 is fixed to the threaded hole in a threaded mode, the tail cone 34 is of an even conical structure and can be knocked and inserted into a roadway side for fixing, the base 35 can be fixed to the roadheader in a direct contact mode through bolts, welding, magnetic attraction and the like, the acceleration sensor is provided with three mutually perpendicular sensitivity directions, and therefore accurate positioning is conducted on the position of a reflected wave.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (8)

1. The utility model provides a little structure advanced detection system based on combine machine of digging power which characterized in that: the system comprises three detection units fixed on two sides of a roadway and a comprehensive excavator and a host connected with the three detection units, wherein each detection unit comprises a plurality of signal receivers and a wireless base station connected with the plurality of signal receivers, the host is in communication connection with each wireless base station, and the signal receivers can acquire the acceleration of shock waves.

2. The fully-mechanized mining power-based small-structure advanced detection system of claim 1, wherein: and signal receivers of the detection units on the lane sides are arranged and fixed on the lane sides along the tunneling direction.

3. The fully-mechanized mining power-based small-structure advanced detection system of claim 1, wherein: and the signal receiver on the comprehensive excavating machine is fixedly coupled with the comprehensive excavating machine.

4. The fully-mechanized mining power-based small-structure advanced detection system of claim 1, wherein: the signal receiver comprises an acceleration sensor and a shell for packaging the acceleration sensor, and a coupling medium is filled between the shell and the acceleration sensor.

5. The fully-mechanized mining power-based small-structure advanced detection system of claim 4, wherein: the mining machine is characterized in that a threaded hole is formed in the shell, a tail cone or a base is fixedly connected with the threaded hole in a threaded mode, the tail cone can be inserted and fixed to a roadway side, and the base can be fixedly connected to the mining machine.

6. The fully-mechanized mining power-based small-structure advanced detection system of claim 5, wherein: the caudal vertebra is a uniform conical structure.

7. The fully-mechanized mining power-based small-structure advanced detection system of claim 5, wherein: the base is in direct contact coupling with the roadheader.

8. The fully-mechanized mining power-based small-structure advanced detection system of claim 4, wherein: the acceleration sensor has three mutually perpendicular sensitivity directions.

Images