CN102183322A - A method for detecting coal mine roof stress in real time and predetermining roof caving - Google Patents
A method for detecting coal mine roof stress in real time and predetermining roof caving Download PDFInfo
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- CN102183322A CN102183322A CN 201110008210 CN201110008210A CN102183322A CN 102183322 A CN102183322 A CN 102183322A CN 201110008210 CN201110008210 CN 201110008210 CN 201110008210 A CN201110008210 A CN 201110008210A CN 102183322 A CN102183322 A CN 102183322A
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Abstract
The invention discloses a method for detecting coal mine roof stress in real time and predetermining roof caving. In the invention, detection units intensively distributing along a roadway on a roof (every 1 meter, 2 meters and the like) and a plurality of detection centers are comprised. The detection unit comprises one or more copolymer piezoelectric sensing elements used to sense stress signals of the rock roof and a processing element. After being pre-processed by the processing element, a sensing signal or data received by the sensing elements is delivered to a detection center. The detection center receives data delivered from a plurality of detection units in a comparatively large area, and analyzes and processes the data. Data can be exchanged among the detection centers to obtain changing status of gob roof in a larger area, thereby analyzing and predetermining roof caving of the coal mine. The method in the invention has characteristics of low cost, convenient installation and flexible network construction. By the method in the invention, the pre-determination and detection of coal mine roof caving in any large area can be realized.
Description
[technical field]
The present invention relates to mine roof fall monitoring instrument instrument and sensor and circuit design field, be specifically related to a kind of low cost, can the dense layout monitoring point, thereby cover the earthquake precursors method of real-time of any large area region.
[background technology]
During coal mining, the mining area roof is often harder and be difficult for collapsing, and therefore, the goaf, mining area often presents large-area outstanding top phenomenon, the outstanding top area in some goaf even have several football fields so big.
Owing to adopted the coal seam hard top board under empty, and caused mining area roof pressure concentration phenomenon, when the intensity of concentrated stress surpasses rock strength, can take place that roof strata ruptures, the phenomenon that collapses, be commonly referred to as " roof fall ".The rock that this roof fall falls has been filled the goaf, and the air in compression goaf forms storm wind.This storm wind energy and power of taking advantage of a situation is very big, and the impact wave energy that storm wind forms starts tens meters with several tons heavy underground equipment, even the down-hole mine car is compressed into a scrap iron.The generation of roof strata fracture, the phenomenon that collapses causes catastrophic casualties, property loss to the mine.
The prerequisite that rock stratum roof plate ruptures, collapses is the heavy burden that the intensity of rock stratum can not support the rock stratum, and this is the process that a strength causes object deformation, and the deformation of monitoring rock stratum is the most direct means of prediction roof fall.The deformation of whole rock stratum is difficult for obtaining, because whole rock stratum is buried in underground, does not have good means to its composite measurement deformation.But for the deformation of local rock formation, we can obtain by the stress monitoring means.If intensive installation can be monitored the sensor of top board STRESS VARIATION in the tunnel, goaf, also just can obtain the deformation situation of the rock stratum that we are concerned about, roof fall is made a prediction and analyzed.
[summary of the invention]
Fundamental purpose of the present invention is exactly to solve the problem that survey, no early warning were only reinforced, faced less to existing coal mine roof plate, a kind of coal mine roof plate drop omen monitoring and large tracts of land roof fall omen monitoring method are provided, have low cost, can the dense layout monitoring point, the abnormal conditions of the capable top board stress of rock of real-time monitor large-area top panel area, thus carry out Roof Fall Analysis and forecast.
For achieving the above object, the invention provides a kind of specific monitoring means structure, tool is characterised in that: comprise at least one monitoring means and at least one monitoring center, described each monitoring means comprises at least one multipolymer piezoelectricity rock top board stress sensing unit, a processing unit, and connect with at least one monitoring center.Other monitoring technology that monitoring means is compared current use have extremely low cost, and quickly networking is installed easily, can be in less zone, such as every 5m, 10m along the tunnel, or the like, monitoring point of layout, thus make a monitoring center can cover a bigger zone; A plurality of monitoring center can the whole colliery of interconnected covering.
Described monitoring means comprises one or more multipolymer piezoelectricity rock top board stress sensings unit, a processing unit.Sensing unit can obtain rock top board stress signal.Processing unit carries out the data of sensing unit sending to monitoring center by wired or wireless mode after the pre-service.Monitoring center realizes the intensive monitoring in big zone, as the foundation of colliery Roof Fall Analysis and forecast by the monitoring means of big regional dense layout.
The multipolymer piezoelectric sensor of described sensing unit, perception rock top board stress, the passive cable of perceptual signal process (such as, superpower toughness high density polyethylene (HDPE), can be when direct-burried waterproof, low electric capacity-89pF/m, can reach 100m or longer) be transferred to ground, carry out sample quantization again after being connected to processing unit.
The capable top board stress of the coal mine roof plate rock situation of the reflection institute overlay area that provides by the large quantities of monitoring means that connect this monitoring center, analysis-by-synthesis is got rid of local interference, carries out the analysis and the forecast of roof fall.The interconnection of a plurality of monitoring center can cover zone, whole colliery.
The invention has the beneficial effects as follows:
The low-cost coal mine roof plate of monitoring in real time rock stratum roof plate stress can dense layout, and covers any large area region, thereby grasps the real-time change of whole monitored area top board state.Solve not have the low cost that realizes for a long time, the problem of setting up of the real-time monitoring point of roof fall that highly dense intensity, large tracts of land cover, forecast for the analysis of roof fall omen and roof fall and to set up detailed, accurate, believable Monitoring Data basis.
[description of drawings]
Fig. 1 is that monitoring means and monitoring center connect one to one.
Fig. 2 is that a monitoring center connects two monitoring means.
Fig. 3 is that the monitoring center of three monitoring means of connection is interconnected.
Fig. 4 is the application-specific analysis of an embodiment of the present invention.
Fig. 5 is a kind of embodiment of monitoring means.(convenient for statement, we are called SP with monitoring means)
[embodiment]
The application's feature and advantage will be by embodiment, in conjunction with the accompanying drawings.
For explaining conveniently, we are called SP with monitoring means, and monitoring center is called SC.By the interconnected roof fall omen monitoring that just can realize big arbitrarily zone of a series of SP and SC, this kind structure comprises at least one SP and at least one SC, and at least one among SP and the SC is interconnected, and SC and SC's is interconnected, as shown in Figures 1 to 3.
SP and SC, SC and SC interconnected all can adopt wireless or wired mode.
Fig. 4 is the application-specific analysis of an embodiment of the present invention, SP of regional layout of every 10m on roadway direction, be total to 100 SP of layout in the zone, tunnel of 1Km like this, at SC of the tunnel of 10km zone layout, SP arrives at least one SC by GPRS or the wireless distributing data of 3G module, by 3G wireless module and wired interconnected, make each SC can obtain the data that Zone Full SP faces survey, thereby monitor colliery roof fall omen in real time between the SC.
Fig. 5 is the embodiment of a kind of SP, comprises two each and every one multipolymer piezoelectricity rock top board stress sensing unit (representing with SA), a processing unit among the SP.The SA sensing unit can obtain the rock top board stress signal of 100Hz to 100kHz; Processing unit comprises that a signal to sensing unit carries out pretreated modules such as digitizing, GPRS or 3G module, and a power management module provides power management, and pretreated data send to monitoring center by GPRS or 3G wireless mode.
The data that SP sends comprise at least:
The sign of SP (each SP has unique identification);
Positional information (coordinate);
The monitoring time precision;
The time interval of monitoring or transmission data;
The top board stress signal of roof strata;
Above content be in conjunction with a kind of embodiment to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (4)
1. the system of the monitoring means of the one kind big intensive real-time monitoring colliery roof fall omen in zone and monitoring center forms structure, it is characterized in that: comprise at least one monitoring means and at least one monitoring center, described each monitoring means comprises at least one multipolymer piezoelectricity rock top board stress sensing unit, a processing unit, and connect with at least one monitoring center.Other monitoring technology that monitoring means is compared current use have extremely low cost, and quickly networking is installed easily, can be in less zone, such as every 5m, 10m along the tunnel, or the like, monitoring point of layout, thus make a monitoring center can cover a bigger zone; A plurality of monitoring center can the whole colliery of interconnected covering.
2. specific monitoring means structure as claimed in claim 1 is characterized in that: described monitoring means comprises one or more multipolymer piezoelectricity rock top board stress sensings unit, a processing unit.Sensing unit can obtain rock top board stress signal.Processing unit carries out the data of sensing unit sending to monitoring center by wired or wireless mode after the pre-service.Monitoring center realizes the intensive monitoring in big zone, as the foundation of colliery Roof Fall Analysis and forecast by the monitoring means of big regional dense layout.
3. specific sensing unit structure as claimed in claim 2, tool is characterised in that: the multipolymer piezoelectric sensor of described sensing unit, perception rock top board stress, the passive cable of perceptual signal process (such as, superpower toughness high density polyethylene (HDPE), can be when direct-burried waterproof, low electric capacity-89pF/m, can reach 100m or longer) be transferred to ground, carry out sample quantization again after being connected to processing unit.
4. monitoring center as claimed in claim 1 structure, it is characterized in that: the coal mine roof plate rock top board stress situation of the reflection institute overlay area that provides by the large quantities of monitoring means that connect this monitoring center, analysis-by-synthesis is got rid of local interference, carries out the analysis and the forecast of roof fall.The interconnection of a plurality of monitoring center can cover zone, whole colliery.
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| CN 201110008210 CN102183322A (en) | 2011-01-14 | 2011-01-14 | A method for detecting coal mine roof stress in real time and predetermining roof caving |
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| CN 201110008210 CN102183322A (en) | 2011-01-14 | 2011-01-14 | A method for detecting coal mine roof stress in real time and predetermining roof caving |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519627A (en) * | 2011-11-14 | 2012-06-27 | 山东科技大学 | Method for quantitatively monitoring dynamic stress range of coal mine |
| CN102913285A (en) * | 2012-11-02 | 2013-02-06 | 中国科学院自动化研究所 | Mine roof hazard warning method |
| CN102928144A (en) * | 2012-10-14 | 2013-02-13 | 中国矿业大学 | System for monitoring gob stress in real time and overlying strata breakage judgment method |
| CN105807312A (en) * | 2016-03-15 | 2016-07-27 | 大连理工大学 | Coal mine roof rock mass vertical zone determination method based on micro-seismic monitoring |
| CN107659203A (en) * | 2017-09-28 | 2018-02-02 | 中国矿业大学 | A kind of deep tunnel roof monitoring wireless sensing node based on wind collecting |
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| US3844248A (en) * | 1973-05-22 | 1974-10-29 | J Parker | Devices and processes for warning against impending rockfalls in underground excavation |
| US4127788A (en) * | 1977-07-08 | 1978-11-28 | Daugherty Ralph N | Piezoelectric stress indicator for mine roofs |
| CN2077027U (en) * | 1989-09-19 | 1991-05-15 | 四川重庆红星无线电厂 | Head plate monitoring alarm treating device |
| CN1250158A (en) * | 1998-08-05 | 2000-04-12 | 松下电器产业株式会社 | Piezoelectric pressure sensor |
| CN101344012A (en) * | 2008-08-05 | 2009-01-14 | 山东省尤洛卡自动化装备股份有限公司 | Dynamic monitoring system of coal mine roof plate |
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2011
- 2011-01-14 CN CN 201110008210 patent/CN102183322A/en active Pending
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| US3844248A (en) * | 1973-05-22 | 1974-10-29 | J Parker | Devices and processes for warning against impending rockfalls in underground excavation |
| US4127788A (en) * | 1977-07-08 | 1978-11-28 | Daugherty Ralph N | Piezoelectric stress indicator for mine roofs |
| CN2077027U (en) * | 1989-09-19 | 1991-05-15 | 四川重庆红星无线电厂 | Head plate monitoring alarm treating device |
| CN1250158A (en) * | 1998-08-05 | 2000-04-12 | 松下电器产业株式会社 | Piezoelectric pressure sensor |
| CN101344012A (en) * | 2008-08-05 | 2009-01-14 | 山东省尤洛卡自动化装备股份有限公司 | Dynamic monitoring system of coal mine roof plate |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519627A (en) * | 2011-11-14 | 2012-06-27 | 山东科技大学 | Method for quantitatively monitoring dynamic stress range of coal mine |
| CN102519627B (en) * | 2011-11-14 | 2015-08-19 | 山东科技大学 | Colliery dynamic stress scope Quantitative Monitoring method |
| CN102928144A (en) * | 2012-10-14 | 2013-02-13 | 中国矿业大学 | System for monitoring gob stress in real time and overlying strata breakage judgment method |
| CN102928144B (en) * | 2012-10-14 | 2015-01-07 | 中国矿业大学 | System for monitoring gob stress in real time and overlying strata breakage judgment method |
| CN102913285A (en) * | 2012-11-02 | 2013-02-06 | 中国科学院自动化研究所 | Mine roof hazard warning method |
| CN105807312A (en) * | 2016-03-15 | 2016-07-27 | 大连理工大学 | Coal mine roof rock mass vertical zone determination method based on micro-seismic monitoring |
| CN105807312B (en) * | 2016-03-15 | 2018-01-26 | 大连理工大学 | Coal mine roof plate rock mass vertical zoning based on micro seismic monitoring determines method |
| CN107659203A (en) * | 2017-09-28 | 2018-02-02 | 中国矿业大学 | A kind of deep tunnel roof monitoring wireless sensing node based on wind collecting |
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Application publication date: 20110914 |