CN102455434A - Monitoring method of working-face coal-body advanced stress - Google Patents
Monitoring method of working-face coal-body advanced stress Download PDFInfo
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- CN102455434A CN102455434A CN2010105145761A CN201010514576A CN102455434A CN 102455434 A CN102455434 A CN 102455434A CN 2010105145761 A CN2010105145761 A CN 2010105145761A CN 201010514576 A CN201010514576 A CN 201010514576A CN 102455434 A CN102455434 A CN 102455434A
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Abstract
The invention discloses a monitoring method of a working-face coal-body advanced stress. The method is characterized by: firstly, determining a monitoring area; then setting a sensor probe and a shot point in the monitoring area; through monitoring analysis of a shock wave generated by shot firing, acquiring a propagation velocity in the coal body; carrying out inversion according to different wave velocity distributions in the coal body through software processing so as to acquire a size of the stress and distribution conditions in the coal body. By using the method of the invention, the stress distribution in the coal body at the front of the working face can be effectively monitored. Monitoring precision is high. Compared to the current other methods, in the invention, boring construction is not needed so that a work amount can be substantially reduced; the method can be used effectively and rapidly; real-time monitoring can be realized so that an adverse impact brought by a hysteresis quality can be reduced; the monitoring precision is high and a function of early warning of hazards is possessed, and installation and operation are convenient.
Description
Technical field
The present invention relates to the monitoring method of the leading stress of a kind of workplace coal body, mainly be applicable to coal mine fully-mechanized mining working, fully mechanized coal face, carry out the monitoring that workplace the place ahead coal body internal stress distributes with hard or thicker top board.
Background technology
For the coal winning method that adopts the mode that all collapses, behind the seam mining, the structure major part of superincumbent stratum is the structure of semiarch formula, so rib one end is almost supporting most of weight of the outstanding cut-layer in working room top.And inbreak spoil in rear, goaf only bears the weight of compacting zone, and is much smaller compared with the support pressure in rib the place ahead, and therefore, the stress distribution of grasping rib the place ahead has vital role for coal face Roof Control and definite advanced support method.
In recent years, along with the increase of mining depth, the increasing of mining rate, the distribution of coal body internal stress not only is related to the problem on deformation in tunnel, also is the immediate cause that rock burst takes place, and therefore the monitoring for ahead work face stress also seems particularly urgent.At present also varied for the monitoring method of the leading stress of coal body, comparatively commonly used at present is exactly the borehole stressmeter method.This method all is to reach the monitoring purpose through erection stress meter in coal body, at first in the workplace crossheading, in the coal body of workplace the place ahead, drills; Boring is along the seam inclination direction, and boring is imbedded borehole stressmeter in the hole after accomplishing; Utilize oil pressure pump in taseometer, to be pressed into fluid; Make it to have certain first pressing, the tensimeter record STRESS VARIATION trend that links to each other with taseometer of basis afterwards, thus draw the Changing Pattern of leading support pressure.But the drilling construction of this method is comparatively complicated, because the crash rate of borehole stressmeter is higher, will once arrange a plurality of taseometers usually, and monitoring periods is longer.In addition, the monitoring range of this method only limits to the near zone of holing, and receives this regional structure influence bigger.And drilling hole stress counts disposable products, can not reuse.It is found that in recent years when stress wave was propagated in coal and rock, the suffered stress intensity of its velocity of propagation and coal and rock was being deposited greatly certain relation, therefore, through the propagation law of velocity of wave in the judgement coal body, but just inverting becomes the stress distribution in the coal body.
Summary of the invention
The monitoring method that the purpose of this invention is to provide the leading stress of a kind of workplace coal body can be monitored any zone of workplace, and monitoring time is shorter, and is very little to producing influence.
To achieve these goals, the present invention adopts following technical scheme:
The monitoring method of the leading stress of a kind of workplace coal body, step is following:
A, choose a workplace of exploiting as the monitored area;
B, skyhook: in a side crossheading of monitoring face, anchor pole is installed near the tunnel of coal body and helps, anchor pole spacing 3～5m; Quantity is looked monitored area length and is decided; The length requirement tail end of skyhook must be deep into zone outside the fissure zone, is positioned at the centre, coal seam, is parallel to top, base plate and vertical rib; Anchor pole needs full length fastening, and anchor pole should closely be fixed with boring;
C, the sensor probe of on mounted said anchor pole tailing screw flight section, screwing on clockwise; This sensor probe is to be used for monitoring the shock wave that explosion produces; This sensor probe should guarantee the center of circle maintenance level of surperficial circle when installing; After this sensor probe installation, all the sensors probe is connected on the mine seismic survey appearance shock wave data that this mine seismic survey appearance is used for collecting and the storage sensors probe monitors with cable;
D, in institute's monitoring face opposite side crossheading, arrange blow-up point, produce the shock wave that supplies sensor probe to receive through explosion, the layout of blow-up point is corresponding with the sensor probe position, equally in the side near coal body;
E, check whether the circuit of each blow-up point is normal, whether be communicated with between exploder and the said sensor probe whether inspection mine seismic survey appearance is in normal operating conditions;
F, carry out explosion: exploder starts moment, and sensor probe and mine seismic survey appearance are started working; After explosion finishes; Lead between exploder and the sensor probe is broken off; The seismic wave signal that sensor probe is monitored imports computer through the vibrations registering instrument, and operation analysis software seismic wave CT resolution system analyzes, and draws the velocity of wave distribution plan of monitored area; Through the anomaly of wave velocity zone is analyzed, just obtained the ABNORMAL STRESS distribution plan of monitored area.
Said adjacent blow-up point spacing, said neighboring sensors probe spacing are from more little, and precision is high more, are to enlarge survey area, can accomplish one-shot measurement after, sensor probe is arranged in new position.
Beneficial effect of the present invention: the present invention can effectively monitor the stress distribution in the coal body of workplace the place ahead, and has higher monitoring accuracy.With existing data by MoM and MEI; This invention need not carried out drilling construction, has significantly reduced quantities, and is more effectively quick; And this invention can realize real-time monitoring; Reduced the adverse effect that hysteresis quality is brought, this invention also possesses the function of monitoring accuracy height and danger early warning, installation and easy to operate in addition.
Embodiment
The monitoring method of the leading stress of a kind of workplace coal body: its step is following: a. chooses a workplace of exploiting as the monitored area; Can realize like this stress distribution in the coal body of workplace the place ahead is observed; B. skyhook: in a side crossheading of monitoring face, anchor pole is installed near the tunnel of coal body and helps, anchor pole spacing 3～5m; Quantity is looked monitored area length and is decided; The length requirement tail end of skyhook must be deep into zone outside the fissure zone, is positioned at the centre, coal seam, is parallel to top, base plate and vertical rib; Anchor pole needs full length fastening, and anchor pole should closely be fixed with boring; C. the sensor probe of on mounted said anchor pole tailing screw flight section, screwing on clockwise; This sensor probe is to be used for monitoring the shock wave that explosion produces; This sensor probe should guarantee the center of circle maintenance level of surperficial circle when installing; After this sensor probe installation, all the sensors probe is connected on the vibrations registering instrument shock wave data that this mine seismic survey appearance is used for collecting and the storage sensors probe monitors with cable; D. in institute's monitoring face opposite side crossheading, arrange blow-up point, produce the shock wave that supplies sensor probe to receive through explosion, the layout of blow-up point is corresponding with the sensor probe position, and is same in the side near coal body; Whether whether the circuit of e. checking each blow-up point is normal, be communicated with between exploder and the said sensor probe, and whether inspection mine vibrations registering instrument is in normal operating conditions; F. carry out explosion: exploder starts moment, and sensor probe and mine vibrations registering instrument are started working; After explosion finishes; Lead between exploder and the sensor probe is broken off; The seismic wave signal that sensor probe is monitored imports computer through the vibrations registering instrument, and operation analysis software seismic wave CT resolution system analyzes, and draws the velocity of wave distribution plan of monitored area; Through the anomaly of wave velocity zone is analyzed, just obtained the ABNORMAL STRESS distribution plan of monitored area.
Said adjacent blow-up point spacing, said neighboring sensors probe spacing are from more little, and precision is high more, are to enlarge survey area, can accomplish one-shot measurement after, probe is arranged in new position.Can there be certain coincidence fore-and-aft survey position (rock gangway road direction).
More than be preferred embodiment of the present invention and design graphic; Above-mentioned preferred embodiment and designing graphicly only illustrates; Be not to be used to limit interest field of the present invention; All with equalization technological means or be the interest field that contained of the application's claim and the implementer does not all break away from protection scope of the present invention.
Claims (2)
1. the monitoring method of the leading stress of workplace coal body, it is characterized in that: its step is following:
A, choose a workplace of exploiting as the monitored area;
B, skyhook: in a side crossheading of monitoring face, anchor pole is installed near the tunnel of coal body and helps, anchor pole spacing 3～5m; Quantity is looked monitored area length and is decided; The length requirement tail end of skyhook must be deep into zone outside the fissure zone, is positioned at the centre, coal seam, is parallel to top, base plate and vertical rib; Anchor pole needs full length fastening, and anchor pole should closely be fixed with boring;
C, the sensor probe of on mounted said anchor pole tailing screw flight section, screwing on clockwise; This sensor probe is to be used for monitoring the shock wave that explosion produces; This sensor probe should guarantee the center of circle maintenance level of surperficial circle when installing; After this sensor probe installation, all the sensors probe is connected on the mine seismic survey appearance shock wave data that this mine seismic survey appearance is used for collecting and the storage sensors probe monitors with cable;
D, in institute's monitoring face opposite side crossheading, arrange blow-up point, produce the shock wave that supplies sensor probe to receive through explosion, the layout of blow-up point is corresponding with the sensor probe position, equally in the side near coal body;
E, check whether the circuit of each blow-up point is normal, whether be communicated with between exploder and the said sensor probe whether inspection mine seismic survey appearance is in normal operating conditions;
F, carry out explosion: exploder starts moment, and sensor probe and mine seismic survey appearance are started working; After explosion finishes; Lead between exploder and the sensor probe is broken off; The seismic wave signal that sensor probe is monitored imports computer through the vibrations registering instrument, and operation analysis software seismic wave CT resolution system analyzes, and draws the velocity of wave distribution plan of monitored area; Through the anomaly of wave velocity zone is analyzed, just obtained the ABNORMAL STRESS distribution plan of monitored area.
2. the monitoring method of the leading stress of a kind of workplace coal body according to claim 1; It is characterized in that: said adjacent blow-up point spacing, said neighboring sensors probe spacing are from more little; Precision is high more; Be to enlarge survey area, can accomplish one-shot measurement after, sensor probe is arranged in new position.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105145761A CN102455434A (en) | 2010-10-20 | 2010-10-20 | Monitoring method of working-face coal-body advanced stress |
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| CN2010105145761A CN102455434A (en) | 2010-10-20 | 2010-10-20 | Monitoring method of working-face coal-body advanced stress |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775073A (en) * | 2014-01-22 | 2014-05-07 | 中国矿业大学 | Mining working face ground stress distribution characteristic detection method |
| CN103790628A (en) * | 2013-05-30 | 2014-05-14 | 天地科技股份有限公司 | Warning evaluation method for fully mechanized mining face roof disasters |
| CN104481590A (en) * | 2014-11-18 | 2015-04-01 | 煤炭科学技术研究院有限公司 | Long wall coal mining roof pressure hydraulic support resistance change characteristic pre-warning method |
| CN107304681A (en) * | 2016-04-22 | 2017-10-31 | 天地科技股份有限公司 | Coal petrography gas composite power disaster is with position monitoring and pre-alarming method |
| CN105784221B (en) * | 2016-04-08 | 2018-08-03 | 山东科技大学 | Lead abutment pressure monitoring method based on fiber bragg grating pressure sensor |
| CN111337971A (en) * | 2020-04-21 | 2020-06-26 | 天地科技股份有限公司 | Coal body stress detection device based on controllable seismic source |
| CN111812728A (en) * | 2020-07-06 | 2020-10-23 | 山东大学 | Well ground resistivity CT observation system and working method thereof |
| CN111810127A (en) * | 2020-07-06 | 2020-10-23 | 北京安科兴业科技股份有限公司 | Laser positioning drilling stress meter mounting rod and mounting method thereof |
| CN113359645A (en) * | 2021-06-30 | 2021-09-07 | 四川交达预应力工程检测科技有限公司 | Prestressed construction monitoring and early warning system and method based on engineering Internet of things |
-
2010
- 2010-10-20 CN CN2010105145761A patent/CN102455434A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790628A (en) * | 2013-05-30 | 2014-05-14 | 天地科技股份有限公司 | Warning evaluation method for fully mechanized mining face roof disasters |
| CN103775073A (en) * | 2014-01-22 | 2014-05-07 | 中国矿业大学 | Mining working face ground stress distribution characteristic detection method |
| CN103775073B (en) * | 2014-01-22 | 2016-04-13 | 中国矿业大学 | A kind of getting working face geostatic stress distribution characteristics detection method |
| CN104481590A (en) * | 2014-11-18 | 2015-04-01 | 煤炭科学技术研究院有限公司 | Long wall coal mining roof pressure hydraulic support resistance change characteristic pre-warning method |
| CN105784221B (en) * | 2016-04-08 | 2018-08-03 | 山东科技大学 | Lead abutment pressure monitoring method based on fiber bragg grating pressure sensor |
| CN107304681A (en) * | 2016-04-22 | 2017-10-31 | 天地科技股份有限公司 | Coal petrography gas composite power disaster is with position monitoring and pre-alarming method |
| CN111337971A (en) * | 2020-04-21 | 2020-06-26 | 天地科技股份有限公司 | Coal body stress detection device based on controllable seismic source |
| CN111812728A (en) * | 2020-07-06 | 2020-10-23 | 山东大学 | Well ground resistivity CT observation system and working method thereof |
| CN111810127A (en) * | 2020-07-06 | 2020-10-23 | 北京安科兴业科技股份有限公司 | Laser positioning drilling stress meter mounting rod and mounting method thereof |
| CN111810127B (en) * | 2020-07-06 | 2023-11-24 | 北京安科兴业科技股份有限公司 | Laser positioning drilling stress meter mounting rod and mounting method thereof |
| CN113359645A (en) * | 2021-06-30 | 2021-09-07 | 四川交达预应力工程检测科技有限公司 | Prestressed construction monitoring and early warning system and method based on engineering Internet of things |
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Application publication date: 20120516 |