CN109188507B - Based on CO2Mine earthquake advanced detection method of cannon - Google Patents

Based on CO2Mine earthquake advanced detection method of cannon Download PDF

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CN109188507B
CN109188507B CN201811062871.0A CN201811062871A CN109188507B CN 109188507 B CN109188507 B CN 109188507B CN 201811062871 A CN201811062871 A CN 201811062871A CN 109188507 B CN109188507 B CN 109188507B
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gas
cannon
advanced detection
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signal
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CN109188507A (en
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王勃
郝家林
黄兰英
刘盛东
周福宝
郑方坤
谢晶岩
高彬
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China University of Mining and Technology CUMT
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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
    • G01V1/02—Generating seismic energy
    • G01V1/104—Generating seismic energy using explosive charges
    • G01V1/13—Arrangements or disposition of charges to produce a desired pattern in space or time
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/20—Arrangements of receiving elements, e.g. geophone pattern

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Abstract

The invention discloses a method based on CO2Mine earthquake advanced detection method of cannon by using CO2Firecracker asA seismic source for mine earthquake advanced detection; drilling a hole in the middle of the head of the roadway, and then drilling CO2Placing the cannon at a preset position for directional installation; a plurality of six-component detectors are sequentially arranged on one side of the roadway side by side; starting the collection host to enable CO2The method comprises the following steps that a vibration signal is transmitted to a pre-excavation direction by a cannon once, and at the moment, a plurality of six-component detectors transmit the detected vibration signal to an acquisition host computer which records the vibration signal; the collection host transmits the collected vibration signals to the computer, and the computer performs comprehensive analysis by combining with on-site geological data and finally predicts the geological abnormal structure in front of the coal roadway. The invention has the advantages of low-pressure initiation, seismic source orientation, controllable energy and reutilization, and can be used for CO2And the monitor performs mine earthquake advanced detection in the coal body fracturing operation process, so that mine earthquake advanced detection is realized under the condition of not influencing the working face construction.

Description

Based on CO2Mine earthquake advanced detection method of cannon
Technical Field
The invention relates to a mine earthquake advanced detection method, in particular to a method based on CO2Provided is a mine earthquake advanced detection method of cannons.
Background
Because of the national conditions of rich coal, less gas and poor oil, the coal in China is determined to occupy the leading position in energy production and consumption and cannot be changed for a long time. Along with the continuous development of the coal industry, mine safety problems are very severe, such as roof caving, coal and gas outburst, mine water inrush and the like seriously affect the life safety of mine workers, and more than 85% of safety problems in many accidents are generated in mine roadway tunneling production according to statistics.
The method for providing the first-hand geological technical data for mine tunnel excavation production by utilizing the seismic advanced detection method is an important guarantee for the safe exploitation of deep coal seams. The design of the mine working face and the development of the roadway urgently need to find out the geological structure distribution rule finely, and the hidden geological structure in the front of the head is not clear, so that a series of major accidents such as falling, coal and gas outburst, mine water inrush and the like are easily caused in the subsequent mining process. At present, a mine earthquake advanced detection seismic source mainly adopts two modes of hammering and blasting, although the hammering seismic source is convenient to implement, the hammered seismic source has the defects of weak emitted energy and low seismic signal resolution; although the energy emitted by the blasting seismic source is strong, the seismic signal resolution is high, the field construction needs to be stopped when the blasting seismic source detonates, and high-voltage detonation is needed, so that corresponding voltage transformation equipment is needed, great potential safety hazards exist in blasting detonation, a plurality of major safety accidents occur once, and under the condition, the approval procedure required by the detonation is forced to be very complicated, and the efficiency is very low. The innovation of seismic sources for seismic advanced detection based on the above situation is a problem which needs to be solved urgently in the industry at present.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a CO-based catalyst2The mine earthquake advanced detection method of the cannon has the advantages of low-pressure detonation, seismic source orientation, controllable energy and reutilization, and can be used for CO2And the monitor performs mine earthquake advanced detection in the coal body fracturing operation process, so that mine earthquake advanced detection is realized under the condition of not influencing the working face construction.
In order to achieve the purpose, the invention adopts the technical scheme that: based on CO2The mine earthquake advanced detection method of the cannon comprises the following specific steps:
A. CO with multiple gas injection holes facing the same direction2The gun is used as a seismic source for mine earthquake advanced detection;
B. comprehensively considering characteristics of lithology, excitation energy and detection depth to determine liquid CO2The medicine quantity Q is shown as the specific formula;
Figure BDA0001797556760000021
wherein Q is liquid CO2The dosage A is the amplitude (namely excitation energy) of the excitation wavelet, n is a value selected in the range of 0.2-1 according to lithology and detection depth, and c is a constant;
C. drilling holes in the middle of the head of the roadway along the pre-excavation direction, determining a plurality of preset positions in the holes at equal intervals, and then adding CO2Placing the cannon to a preset position nearest to the hole opening of the drill hole for directional installation, and then, placing CO at the preset position2Leading out the detonating cord of the cannon to the drill hole opening;
D. in the range of 100 meters away from the head of the roadway on one side wall, sequentially arranging a plurality of six-component detectors side by side, wherein the six-component detectors are all connected with the acquisition base station and the acquisition host through a connecting main line, so that the six-component detectors, the acquisition base station and the acquisition host form an earthquake advanced detection observation system;
E. the CO in the step C is treated2The cannon is connected with the signal trigger box in parallel on the low-voltage exploder through the detonating cord, and the signal trigger box is connected with the acquisition host;
F. starting the collection host machine, and enabling CO to be generated through a low-pressure exploder2The method comprises the following steps that a vibration signal is transmitted to a pre-excavation direction by a cannon, and meanwhile, a signal trigger box feeds back a trigger signal to a collection host machine, so that the collection host machine receives data transmitted by a six-component detector in real time; at the moment, the six-component detectors transmit the detected vibration signals to the acquisition host, and the acquisition host records the vibration signals; then CO is introduced2After the cannon is pushed into the borehole to the next preset position, CO is led to be arranged through a low-pressure detonator2The cannon emits a vibration signal once again to the pre-excavation direction, the signal trigger box feeds back a trigger signal to the acquisition host computer at the same time, the acquisition host computer records the signals, and the process is circulated until CO2After the cannon finishes launching at each preset position, finishing the collection work;
G. the collection host transmits the collected vibration signals to the computer, and the computer performs comprehensive analysis by combining with on-site geological data and finally predicts the geological abnormal structure in front of the coal roadway.
Further, the distance between the six component detectors in the step D is 5 meters.
Further, the CO is2The cannon is CO2And (3) a vibration gun excited in the gas-phase fracturing pipe.
Compared with the prior art, the invention adopts CO2The gun is used as the seismic source for the earthquake advanced detection due to CO2The characteristics of safe low-pressure detonation, directional installation detonation, seismic source orientation, controllable energy and reusability of the gun can solve the problems of weak energy, low resolution, complex explosive seismic source, potential safety hazard and the like of the existing mine advanced detection hammering seismic source, and in addition, CO2The gun is currently used as a main tool for increasing permeability of coal bed fracturing under a mine, so that CO is adopted2The mode that the cannon is used as a seismic source for seismic advanced detection does not need to additionally add seismic source equipment, and the working principle of the cannon is that CO which is changed into gas state from liquid state through low-pressure detonation2The original cracks in the coal rock body are expanded and permeability-increased or are fractured to generate new cracks through the impact force, so that the gas in the coal rock body is conveniently extracted2The coal rock mass is impacted after the cannon is launched, the impact energy can enable the coal rock mass to generate a vibration signal, the vibration signal is obtained through the six-component wave detector, and therefore CO can be detected2The monitor carries out vibration advanced detection in the process of carrying out coal body fracturing operation, thereby realizing the advanced detection of the geological structure in a mode without influencing field construction.
Drawings
FIG. 1 is a position layout diagram of the present invention.
In the figure: 1. coal seam, 2, CO2The system comprises a gun 3, a drill hole 4, a roadway 5, a top plate 6, a bottom plate 7, a collecting host machine 8, a six-component detector 9, a head-on 10 and a detonating cord.
Detailed Description
The present invention will be further explained below.
As shown in the figure, the method comprises the following specific steps:
A. by using more than oneWith individual gas injection holes facing the same CO2A gun 2 used as a seismic source for mine earthquake advanced detection;
B. comprehensively considering characteristics of lithology, excitation energy and detection depth to determine liquid CO2The medicine quantity Q is shown as the specific formula;
Figure BDA0001797556760000031
wherein Q is liquid CO2The dosage, A is the amplitude of the excitation wavelet (excitation energy), n is a value selected within the range of 0.2-1 according to lithology and detection depth (advanced detection in coal bed is generally selected as
Figure BDA0001797556760000032
) C is a constant;
C. drilling a borehole 3 in the middle of the roadway head 9 along the pre-excavation direction, determining a plurality of preset positions in the borehole 3 at equal intervals, and then introducing CO2The cannon 2 is placed to a preset position nearest to the hole opening of the drill hole for directional installation, and CO is discharged after the directional installation is finished2Leading out the detonating cord of the cannon 2 to the drill hole opening;
D. in the range of 100 meters away from the head of the roadway 4, a plurality of six-component detectors 8 are sequentially arranged side by side, and the six-component detectors 8 are connected with the acquisition base station and the acquisition host 7 through a connecting main line, so that the six-component detectors 8, the acquisition base station and the acquisition host 7 form an earthquake advanced detection observation system;
E. the CO in the step C is treated2The cannon 2 is connected with a signal trigger box in parallel on the low-voltage exploder through an explosion wire, and the signal trigger box is connected with an acquisition host 7;
F. the collection host 7 is started, and CO is led by a low-pressure detonator2The monitor 2 emits a primary vibration signal to the pre-excavation direction, and simultaneously the signal trigger box feeds back a trigger signal to the acquisition host 7, so that the acquisition host 7 receives data transmitted from the six-component detector 8 in real time; at the moment, the six-component detectors 8 transmit the detected vibration signals to the acquisition host 7, and the acquisition host 7 records the vibration signals; then CO is introduced2The gun 2 is advanced into the borehole 3 to the next predetermined positionAfter that, CO is initiated by a low-pressure initiator2The cannon 2 emits a vibration signal once again to the pre-excavation direction, meanwhile, the signal trigger box feeds back a trigger signal to the acquisition host 7, the acquisition host 7 records, and the process is circulated until CO2The cannon 2 finishes the collection work after finishing the launching at each preset position;
G. the collecting host 7 transmits the collected vibration signals to a computer, and the computer performs comprehensive analysis by combining with field geological data and finally predicts geological abnormal structures in front of the coal roadway.
Further, the distance between the six-component detectors 8 in the step D is 5 meters.
Further, the CO is2The cannon 2 is CO2And (3) a vibration gun excited in the gas-phase fracturing pipe.

Claims (2)

1. Based on CO2The mine earthquake advanced detection method of the cannon is characterized by comprising the following specific steps:
A. CO with multiple gas injection holes facing the same direction2Gas phase fracturing of the tube to convert CO2When the gas-phase fracturing pipe fractures the coal body, the vibration generated by the coal body is used as a seismic source for mine earthquake advanced detection;
B. comprehensively considering characteristics of lithology, excitation energy and detection depth to determine liquid CO2The medicine quantity Q is shown as the specific formula;
Figure DEST_PATH_IMAGE002
wherein Q is liquid CO2The dosage A is the amplitude of the excitation wavelet, n is a value selected in the range of 0.2-1 according to lithology and detection depth conditions, and c is a constant;
C. drilling holes in the middle of the head of the roadway along the pre-excavation direction, determining a plurality of preset positions in the holes at equal intervals, and then adding CO2The gas phase fracturing pipe is placed to a preset position nearest to the hole opening of the drill hole for directional installation, and CO is added after the directional installation is finished2Leading out a detonating cord of the gas-phase fracturing pipe to a drill hole opening;
D. in the range of 100 meters away from the head of the roadway on one side wall, sequentially arranging a plurality of six-component detectors side by side, wherein the six-component detectors are all connected with the acquisition base station and the acquisition host through a connecting main line, so that the six-component detectors, the acquisition base station and the acquisition host form an earthquake advanced detection observation system;
E. the CO in the step C is treated2The gas-phase fracturing pipe is connected in parallel with the signal trigger box on the low-pressure exploder through an explosion wire, and the signal trigger box is connected with the acquisition host;
F. starting the collection host machine, and enabling CO to be generated through a low-pressure exploder2The gas-phase fracturing pipe emits a primary vibration signal to the pre-excavation direction, and the signal trigger box feeds back a trigger signal to the acquisition host machine, so that the acquisition host machine receives data transmitted by the six-component detector in real time; at the moment, the six-component detectors transmit the detected vibration signals to the acquisition host, and the acquisition host records the vibration signals; then CO is introduced2After the gas-phase fracturing pipe is pushed into the drill hole to the next preset position, CO is enabled to be generated by the low-pressure initiator2The gas-phase fracturing pipe emits a vibration signal once again to the pre-excavation direction, meanwhile, the signal trigger box feeds back a trigger signal to the acquisition host, the acquisition host records the signal, and the process is circulated until CO2Completing the collection work after the gas-phase fracturing pipe finishes launching at each preset position;
G. the collection host transmits the collected vibration signals to the computer, and the computer performs comprehensive analysis by combining with on-site geological data and finally predicts the geological abnormal structure in front of the coal roadway.
2. A CO-based composition according to claim 12The mine earthquake advanced detection method of the cannon is characterized in that the distance between the six-component detectors in the step D is 5 meters.
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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
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CN204116614U (en) * 2014-11-03 2015-01-21 河南省汉唐进出口有限公司 Supercritical CO 2 phase transformation CUMULATIVE BLASTING medium and low frequency focus
CN104297778A (en) * 2014-11-03 2015-01-21 河南省汉唐进出口有限公司 Low-frequency shock source in supercritical CO2 phase change energy-gathered explosion and shock source collection method

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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
PL230226B1 (en) * 2014-10-30 2018-10-31 Inst Technik Innowacyjnych Emag Method and the system for the assessment of the occurrence of a hazard of high-power shocks, generated by the underground exploitation
CN205280953U (en) * 2015-12-14 2016-06-01 山西潞安环保能源开发股份有限公司常村煤矿 Single -point arouses multiple spot to receive mine tunnel forward probe device

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Publication number Priority date Publication date Assignee Title
CN204116614U (en) * 2014-11-03 2015-01-21 河南省汉唐进出口有限公司 Supercritical CO 2 phase transformation CUMULATIVE BLASTING medium and low frequency focus
CN104297778A (en) * 2014-11-03 2015-01-21 河南省汉唐进出口有限公司 Low-frequency shock source in supercritical CO2 phase change energy-gathered explosion and shock source collection method

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