CN103104294B - Rock burst prediction method - Google Patents
Rock burst prediction method Download PDFInfo
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- CN103104294B CN103104294B CN201310040211.3A CN201310040211A CN103104294B CN 103104294 B CN103104294 B CN 103104294B CN 201310040211 A CN201310040211 A CN 201310040211A CN 103104294 B CN103104294 B CN 103104294B
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Abstract
The invention discloses a rock burst prediction method. According to the method, a three-dimensional vibration-picking connecting sleeve (2) is fixedly connected between an electric coal drill (1) and a drilling rod (3), the three-dimensional vibration-picking connecting sleeve (2) is used for synchronously collecting three-dimensional vibration signals of the drilling rod in the drilling process, the vibration signals are wirelessly transmitted to a signal transceiver (6) for storage through a wireless radio frequency transceiver chip (5) on the three-dimensional vibration-picking connecting sleeve (2), a spectrum curve is output at an interval time T, the first 8 orders of master frequency of each spectrum curve are recorded, a changing curve of each order of master frequency along with the drilling depth or time is output, then the number of distortion points on the changing curve of each order of master frequency along with the drilling depth or time is used for predicting rock burst tendentiousness of a coal bed, and the amount of drilling cuttings and the vibration curves obtained in drilling are combined to predict rock burst comprehensively. By means of the method, impacting phenomena of drill sucking, drill clamping and drilling are digitalized, and accuracy of rock burst prediction is greatly improved.
Description
Technical field
The present invention relates to the Forecasting Methodology of a kind of mine bump or rock burst.
Background technology
Bump, also known as rock burst, refers to roadway or work plane surrounding rock body, produces suddenly the violent dynamic phenomenon destroyed, often dishes out with coal and rock, the phenomenon such as loud noise and blast due to the instantaneous relase of elastic deformation energy.It has very large destructiveness, is one of colliery disaster.Bump has omen before occurring, and main manifestations is: periodic weighting manifests acutely, cuts gugen kohle wall wall caving, the roof fall of upper and lower termination, and speed of crushing increases; There is bit freezing when beating release big gun, pressure relief vent and inhale and bore phenomenon.
Generally, bump occurs in the area of stress concentration of getting working face.Its peak value is larger, and peak distance rib is nearer, and the danger that bump occurs is larger.Before bump occurs, coal rock deformation is stagnated, and roof and floor translational speed slows down, and coal is extruded by work plane and also slows down.The coal seam be compressed and the top deformed, base plate bear high pressure in the mode of elastic deformation, and accumulate a large amount of deformation energy.The sound emission and microseismic activity that cause can be changed by Deformation Monitoring, just may infer danger of burst degree.Accumulate energy many, shock hazard is just large.If repeatedly discharge, then the small scale discharged.If once concentrate release, then impact strong.
The Forecasting Methodology of bump, except heuristic methods in the past, roughly can be divided into two classes.One class is the partial detection method based on drilling cuttings method, comprises coal and rock deformation observation method, coal and rock stress measurement method, flowing rock noise detection method, rock cake method etc.These class methods are mainly used in the danger of burst degree detecting digging partial section, and simple, intuitive and reliable, are used widely.But the shortcoming of these class methods is prediction work in time, spatially discontinuous, time-consuming.
Equations of The Second Kind is system monitoring method, comprises rock noise system monitoring method and microseismic system monitoring method, and other geophysical methods, as: electromagnetic radiation, ground temperature, earth magnetism etc.These class methods are according to the dynamic phenomenon predicting rock burst precarious position occurred in recording occurring continuously coal and rock.The primary condition of institute's foundation is the dangerous destruction process of rock mass structure, be the series of physical phenomenon occurred in advance is information.These class methods can be implemented in the continuous monitoring on room and time.But adopt the method maintenance management more difficult, analyze data and judge that the mechanical state difficulty of coal and rock is comparatively large, need through long term test, accumulating a large amount of empirical data just can Accurate Prediction.
Therefore, develop a kind of bump drilling rod and move parameter prediction method, adopting when holing pick-up device these oscillation phenomenons to be recorded, just can judge whether shock hazard according to the characteristic value of a little oscillation phenomenon.Or the signal collected by pick-up device is monitored the leading indicator of impulsion pressure as drilling cuttings method thus improved drilling cuttings method precision of prediction, obvious for raising coal mine safety prewarning degree meaning.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the Forecasting Methodology of the high bump of a kind of degree of accuracy.
The technical scheme that the present invention solves the problems of the technologies described above comprises the following steps:
1) checkout gear is connected: be fixed on drilling rod by one end of three-dimensional pick-up adapter sleeve, confirm that the signal transmitting and receiving between three-dimensional pick-up adapter sleeve and signal transmitting and receiving machine send normally, again the other end of three-dimensional pick-up adapter sleeve and electric coal drill are socketed, open electric coal drill test running;
Described three-dimensional pick-up adapter sleeve is composed of a fixed connection by the linkage I at three dimension acceleration sensor and three dimension acceleration sensor two ends and linkage II, the shell of described three dimension acceleration sensor is connected with radio transceiver chip; The shell of signal transmitting and receiving machine is connected with radio transceiver chip, described linkage I is socketed with electric coal drill, and linkage II is affixed with drilling rod.
2) prebored hole: collect coal dust amount at non-high stress concentration zone prebored hole 1m, the time of record boring needed for 1m, rounds this time divided by 15 and obtains the spectrum curve output gap time
t; The three-dimensional vibrating situation of drilling rod when three dimension acceleration sensor synchronous acquisition creeps into during boring, the three-dimensional acceleration signal that three dimension acceleration sensor collects by radio transceiver chip I fixing on three dimension acceleration sensor shell is transferred on the signal transmitting and receiving machine with radio transceiver chip II and stores, and the data signal be stored on signal transmitting and receiving machine obtains the master oscillator frequenc of data signal and forms rumble spectrum curve after the spectrum block Spectrum Conversion on signal transmitting and receiving machine.
3) boring and signals collecting: start drill hole of drilling machine, the three-dimensional vibrating of drilling rod when three dimension acceleration sensor synchronous acquisition creeps into during boring, three-dimensional acceleration signal is transferred on signal transmitting and receiving machine by radio transceiver chip I and stores, at interval of the time
texport a spectrum curve, record the front 8 rank master oscillator frequencs of each spectrum curve, export every rank master oscillator frequenc in time or drilling depth change curve; Often stop creeping into after boring 1m, and collect coal dust amount.
4) prediction of bump: for not having normally creeping into of bump, the extensional vibration of drilling rod and oscillation crosswise are equivalent to the beam vibration mechanical model of two ends freely-supported, and when bit freezing, be equivalent to certain some increase intermediate support in beam and limit the radial displacement of this point, oscillation crosswise frequency then during bit freezing can obviously increase, and namely reveals distortion at " oscillation crosswise frequency-drilling depth " curve table; And when there is drilling hole burst, the end condition of drilling rod extensional vibration changes, then extensional vibration frequency during drilling hole burst also can obviously increase, and namely shows distortion equally at " extensional vibration frequency-drilling depth " curve;
Therefore, the rumble spectrum curve generalization predicting rock burst obtained during prebored hole according to master oscillator frequenc in step 3) in time or the bump-prone property in the measurable coal seam of distortion point number of drilling depth change curve, then in conjunction with coal powder quantity of bore and step 2).
Further, the acceleration transducer described in step 1) adopts the piezoelectric acceleration transducer of built-in charge amplifier, and drilling rod adopts twist drill rods, and electric coal drill adopts in high-stress coal, bores electric coal drill required when φ 42 ~ 50mm holes.
The invention has the beneficial effects as follows: the impact taxis predicting coal body according to three parameters such as coal powder quantity of bore, the horizontal master oscillator frequenc of drilling rod and the longitudinal master oscillator frequencs of drilling rod, by auxiliary parameter (inhale bore, bit freezing and the drilling hole burst phenomenon) digitlization in drilling cuttings method, avoid in the construction of drilling cuttings method to cause because operating personnel's error of omission and bump is failed to judge phenomenon; Meanwhile, using the master oscillator frequenc of drilling rod vibration when creeping into as major prognostic parameter, the accuracy of Prediction of Rock Burst is substantially increased.
Accompanying drawing explanation
Fig. 1 be the inventive method adopt the structure chart of device.
In figure: 1, electric coal drill, 2, three-dimensional pick-up adapter sleeve, 3, twist drill rods, 4, drill bit, 5, radio transceiver chip I, 6, signal transmitting and receiving machine, 7, radio transceiver chip II, 21, linkage I, 22, three dimension acceleration sensor, 21, linkage II.
Detailed description of the invention
Below in conjunction with accompanying drawing 1 and detailed description of the invention, the present invention is described in further detail.
A Forecasting Methodology for bump, its step is as follows:
1) checkout gear is connected: be fixed on drilling rod 3 by one end of three-dimensional pick-up adapter sleeve 2, confirm that the signal transmitting and receiving between three-dimensional pick-up adapter sleeve 2 and signal transmitting and receiving machine 6 send normally, again the other end of three-dimensional pick-up adapter sleeve 2 and electric coal drill 1 are socketed, open electric coal drill 1 test running;
Described three-dimensional pick-up adapter sleeve 2 is composed of a fixed connection by the linkage I 21 at three dimension acceleration sensor 22 and three dimension acceleration sensor two ends and linkage II 23, has been provided with wireless rf chip I 5 in described three dimension acceleration sensor 22; Be provided with radio transceiver chip II 7 in signal transmitting and receiving machine 6, described linkage I 21 is socketed with electric coal drill 1, and linkage II 23 is affixed with drilling rod 3;
Described acceleration transducer 22 adopts the piezoelectric acceleration transducer of built-in charge amplifier, and drilling rod 3 adopts twist drill rods, and electric coal drill adopts in high-stress coal, bores electric coal drill required when φ 42 ~ 50mm holes.
2) prebored hole: collect coal dust amount at non-high stress concentration zone prebored hole 1m, the time of record boring needed for 1m, rounds this time divided by 15 and obtains the spectrum curve output gap time
t; The three-dimensional vibrating situation of drilling rod 3 when three dimension acceleration sensor 22 synchronous acquisition creeps into during boring, the three-dimensional acceleration signal that three dimension acceleration sensor 22 collects by radio transceiver chip I 5 fixing on three dimension acceleration sensor 22 shell is transferred on the signal transmitting and receiving machine 6 with radio transceiver chip II 7 and stores, and the data signal be stored on signal transmitting and receiving machine 6 obtains the master oscillator frequenc of data signal and forms rumble spectrum curve after the spectrum block Spectrum Conversion on signal transmitting and receiving machine.
3) boring and signals collecting: first round according to 3.5 times of mining height and determine drilling depth and prepare drilling rod and screw-type adapter sleeve, drill hole of drilling machine is started after everything in readiness, the three-dimensional vibrating of drilling rod when three dimension acceleration sensor 22 synchronous acquisition creeps into during boring, three-dimensional acceleration signal is transferred on signal transmitting and receiving machine 6 by radio transceiver chip I 5 and stores, at interval of the time
texport a spectrum curve, record the front 8 rank master oscillator frequencs of each spectrum curve, export every rank master oscillator frequenc in time or drilling depth change curve; Often stop creeping into after boring 1m, and collect coal dust amount;
4) prediction of bump: for not having normally creeping into of bump, the extensional vibration of drilling rod and oscillation crosswise are equivalent to the beam vibration mechanical model of two ends freely-supported, and when bit freezing, be equivalent to certain some increase intermediate support in beam and limit the radial displacement of this point, oscillation crosswise frequency then during bit freezing can obviously increase, and namely reveals distortion at " oscillation crosswise frequency-drilling depth " curve table; And when there is drilling hole burst, the end condition of drilling rod extensional vibration changes, then extensional vibration frequency during drilling hole burst also can obviously increase, and namely shows distortion equally at " extensional vibration frequency-drilling depth " curve;
Therefore, the rumble spectrum curve generalization predicting rock burst obtained during prebored hole according to master oscillator frequenc in step 3) in time or the bump-prone property in the measurable coal seam of distortion point number of drilling depth change curve, then in conjunction with coal powder quantity of bore and step 2).
Claims (4)
1. a Forecasting Methodology for bump, the steps include:
1) connect checkout gear: be fixed on drilling rod (3) by one end of three-dimensional pick-up adapter sleeve (2), the other end and electric coal drill (1) are socketed, open electric coal drill (1) test running;
Described three-dimensional pick-up adapter sleeve (2) is composed of a fixed connection by the linkage I (21) at three dimension acceleration sensor (22) and three dimension acceleration sensor two ends and linkage II (23), the shell of described three dimension acceleration sensor (22) is connected with radio transceiver chip I (5); The shell of signal transmitting and receiving machine (6) is connected with radio transceiver chip II (7);
2) prebored hole: collect coal dust amount at non-high stress concentration zone prebored hole 1m, the time of record boring needed for 1m, rounds this time divided by 15 and obtains the rumble spectrum curve output gap time
t; The three-dimensional vibrating situation of drilling rod (3) when three dimension acceleration sensor (22) synchronous acquisition creeps into during boring, the three-dimensional acceleration signal that three dimension acceleration sensor (22) collects is transferred to the upper storage of signal transmitting and receiving machine (6) with radio transceiver chip II (7) by radio transceiver chip I (5), and the data signal be stored on signal transmitting and receiving machine (6) obtains the master oscillator frequenc of data signal and forms rumble spectrum curve after the spectrum block Spectrum Conversion on signal transmitting and receiving machine;
3) boring and signals collecting: start drill hole of drilling machine, the three-dimensional vibrating of drilling rod (3) when three dimension acceleration sensor (22) synchronous acquisition creeps into during boring, three-dimensional acceleration signal is transferred to the upper storage of signal transmitting and receiving machine (6), at interval of the time by radio transceiver chip I (5)
texport a spectrum curve, record the front 8 rank master oscillator frequencs of each spectrum curve, export every rank master oscillator frequenc in time or drilling depth change curve; Often stop creeping into after boring 1m, and collect coal dust amount;
4) prediction of bump: according to master oscillator frequenc in step 3) in time or the bump-prone property in the measurable coal seam of distortion point number of drilling depth change curve, then in conjunction with coal powder quantity of bore and step 2) prebored hole time the rumble spectrum curve generalization predicting rock burst that obtains.
2. the Forecasting Methodology of a kind of bump as claimed in claim 1, the acceleration transducer (22) described in step 1) adopts the piezoelectric acceleration transducer of built-in charge amplifier.
3. the Forecasting Methodology of a kind of bump as claimed in claim 1, the drilling rod (3) described in step 1) adopts twist drill rods.
4. the Forecasting Methodology of a kind of bump as claimed in claim 1, the electric coal drill (1) described in step 1) adopts in high-stress coal, bores electric coal drill required when φ 42 ~ 50mm holes.
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| CN201310040211.3A CN103104294B (en) | 2013-02-01 | 2013-02-01 | Rock burst prediction method |
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| CN106150476B (en) * | 2015-04-09 | 2019-04-30 | 中国石油化工股份有限公司 | A kind of system of viscous suction bit freezing risk that predicting drill string |
| CN106522950A (en) * | 2016-10-20 | 2017-03-22 | 山东科技大学 | Method for monitoring rock burst risk of soft coal roadway posterior |
| CN107589026B (en) * | 2017-09-05 | 2020-09-11 | 辽宁工程技术大学 | Rock burst simulator |
| CN110486007B (en) * | 2019-08-29 | 2023-02-03 | 武汉长盛煤安科技有限公司 | In-situ testing device and method for mechanical parameters of coal mine surrounding rock while drilling |
| CN110905402B (en) * | 2019-11-13 | 2021-05-28 | 山东科技大学 | Pressure relief hole construction method based on mining induced stress dynamic monitoring |
| CN111325461B (en) * | 2020-02-18 | 2022-03-08 | 山东科技大学 | Real-time evaluation method for coal seam impact risk based on vibration monitoring technology |
| CN111551624B (en) * | 2020-04-21 | 2023-07-07 | 山东科技大学 | Device and method for predicting rock burst of coal rock through hydrogen bond rupture |
| CN112483185A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for observing rock burst danger range under three-dimensional coal pillar |
| CN112523807A (en) * | 2020-12-18 | 2021-03-19 | 山东科技大学 | Three-dimensional coal pillar transfer force display observation method for impact roadway area |
| CN114483024B (en) * | 2022-04-18 | 2022-07-15 | 中国矿业大学(北京) | Rock burst grade in-situ evaluation and control design method |
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Effective date of registration: 20201224 Address after: 224400 No.10 Chunyuan Road, Xingou Town, Funing County, Yancheng City, Jiangsu Province Patentee after: Funing Jinyu Plastics Co.,Ltd. Address before: 411201 shimatou, Taoyuan Road, Yuhu District, Xiangtan City, Hunan Province Patentee before: Hunan University of Science and Technology |
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