CN202883017U - Online monitoring and pre-warning system for coal mine anchor cable stress - Google Patents
Online monitoring and pre-warning system for coal mine anchor cable stress Download PDFInfo
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- CN202883017U CN202883017U CN 201220591519 CN201220591519U CN202883017U CN 202883017 U CN202883017 U CN 202883017U CN 201220591519 CN201220591519 CN 201220591519 CN 201220591519 U CN201220591519 U CN 201220591519U CN 202883017 U CN202883017 U CN 202883017U
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Abstract
The utility model discloses an online monitoring and pre-warning system for coal mine anchor cable stress, and belongs to the field of online monitoring and pre-warning for coal mine anchor cable support conditions. The online monitoring and pre-warning system comprises a pressure sensor, a data acquisition unit, a master data receiver and a master computer, wherein the pressure sensor is mounted on a key anchor cable and used for acquiring the stress condition of the anchor cable, the data acquisition unit is connected with the pressure sensor, the master data receiver is connected with the data acquisition unit, and the master computer is connected with the master data receiver. The pressure sensor is connected with the data acquisition unit through a data line, the data acquisition unit is connected with the ground master computer after collecting acquired data to the master data receiver, and data processing results are obtained by data analysis software to decide whether to send short messages for pre-warning or not. Moreover, when the results exceed a safe range, pre-warning is timely issued. The online monitoring and pre-warning system has the advantages that the data are timely updated, the safety condition of a coal mine roof can be monitored and automatically pre-warned all day long and the like, and the system can be used for managing, monitoring and pre-warning the support condition of the coal mine roof.
Description
Technical field
The utility model relates to the stressed on-line monitoring of a kind of colliery anchor cable and early warning system, belongs to on-line monitoring and early warning field; Be mainly used in Real-Time Monitoring and the early warning of coal mine roof plate supporting situation.
Background technology
For a long time, roof accident is colliery the most incidental heavy accident.Roof accident refers in the underground coal mining process, and the unexpected inbreak of top board causes casualties, the accident of device damage, production termination etc.Show that according to statistics the China's coal-mine roof accident plays number and death toll, account for respectively coal mining accident and always play 50%, 40% of number and death toll.Therefore, strengthen the coal mine roof plate management, it is significant to prevent that roof accident from occuring.Since the nineties in 20th century, the supporting method take cable bolting as core has been obtained in the colliery tunnel support engineering of China and has been developed by leaps and bounds, and has greatly improved the safe condition of back.The cable bolting detection of construction quality is indivisible important component part in the coal mine roadway cable bolting complete set technology.After the cable bolting construction, reply deformation of the surrounding rock in tunnel and destruction situation, anchor pole (rope) distribution of force and size are systematically monitored comprehensively, to obtain displacement and the stress information of prop and country rock, thereby reasonability and the reliability of checking cable bolting initial designs are judged degree of stability and the safety of roadway surrounding rock.
The supporting position of anchor cable is whole support system ground key position often, even sometimes the anchor pole of negligible amounts lost efficacy in support system and can not produce considerable influence to whole support system, yet the inefficacy of an anchor cable is huge on the impact of support system.Often the inefficacy of an anchor cable will cause the inefficacy of whole support system, and then causes a series of roof accidents.So to the monitoring of down-hole support system stream line stressing conditions, particularly real-time, the online monitoring of key position place anchor cable stressing conditions is most important.At present, traditional, conventional mechanical type or inductance type method are still adopted in the factor monitoring that back pressure, displacement, anchor cable force-bearing situation etc. is directly affected tunnel safety, and be most of even or see prediction and the early warning that can realize roadway surrounding rock pressure, stress, displacement, anchor cable force-bearing situation by artificial.Thus, often cause monitored data to lag behind, can't monitor the roof timbering situation in real time.Therefore, between the importance of anchor cable in whole support system, adopting real-time, dynamic back monitoring technology is the only way that guarantees mine safety production.
Summary of the invention
The utility model provides the stressed on-line monitoring of a kind of colliery anchor cable and early warning system, and purpose is in order to solve the on-line monitoring problem of coal mine roof plate cable bolting anchor cable stressing conditions.
The utility model is realized with following technical scheme: a kind of colliery anchor cable on-line monitoring and early warning system, it comprises and is installed on the key position anchor cable pressure sensor that is used for gathering the anchor cable stressing conditions, the data acquisition unit that is connected with pressure sensor, the master data receiver that is connected with data acquisition unit, the master computer that is connected with the master data receiver; Described pressure sensor is connected with data acquisition unit by data wire, and data acquisition unit is connected with aboveground master computer by optical cable after institute's image data is summarized in the master data receiver; Draw data processed result by DAS again, when occurring exceeding the situation of safe range, send early warning.
In the stressed on-line monitoring of this colliery anchor cable and the early warning system, the anchor cable present position of laying pressure sensor is only limited to the key position of roof timbering, thereby carries out targetedly real time on-line monitoring.The data of transmitting via the master data receiver are by after the related software analyzing and processing, and selection with good conditionsi sends the SMS early warning.
The beneficial effects of the utility model: the utility model carries out real time on-line monitoring to down-hole anchor cable stressing conditions, and only carries out data monitoring for key position, only sends early warning for the situation that exceeds safe range.The utility model has remedied the deficiency that traditional monitoring method data lag behind, and downhole safety is implemented 24 hours on-line monitorings.Owing to only carry out data monitoring for local key position, reduced spending and data processing amount, help more efficiently monitoring management.After down-hole anchor pole force-bearing situation exceeded safe range, on-line monitoring system sent early warning automatically, need not the omnidistance monitoring of staff, thereby reached the generation that prevents roof accident.
Description of drawings
Fig. 1 is system construction drawing of the present utility model;
Fig. 2 is pressure sensor installation site figure.
Among the figure: 1, pressure sensor, 2, data acquisition unit, 3, the master data receiver, 4, optical cable, 5, master computer, 6, mobile phone, 7, basic top, 8, anchor cable, 9, pallet, 10, immediate roof, 11, nut.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1, a plurality of pressure sensors 1 of the stressed on-line monitoring of this colliery anchor cable and early warning system, and all be installed on anchor cable 8 places of key position, concrete pressure sensor 1 mounting means as shown in Figure 2, pressure sensor 1 is installed between the pallet 9 and nut 11 of exposed parts of anchor cable 8, gathers the anchor cable stressing conditions and also transmits stressing conditions.Consider underworkings, particularly the length in large tunnel is generally very long, that have even reach thousands of rice, large tunnel can be divided into a plurality of locations, a data collector 2 is placed in each location at underworkings, and each pressure sensor 1 in this location all is connected by data wire with the data acquisition unit 2 in this location; Each ground segment length is controlled in 50 meters generally speaking.Thereby transfer data on the data acquisition unit 2.Again each data acquisition unit 2 is connected with master data receiver 3 by data wire, realizes the process that data gather.At last, with optical cable 4 master data receiver 3 and aboveground master computer 5 are coupled together, transfer data on the master computer 5, to data analysis, processing, and determine whether to send the SMS early warning by corresponding software.
Adopt related software that the situation that exceeds safe range is made automatic early-warning, it is as follows specifically to send the early warning situation:
Wherein
The stressed size of arbitrary moment t i root anchor cable, x
MaxIt is the maximum stress that can bear by the anchor cable that calculates in conjunction with concrete conditions down-hole.
In such cases, the stressed maximum stress that can bear that exceeded of anchor cable illustrates that top board ore deposit pressure manifests acutely herein, and the roof fall possibility is arranged, and anchor cable has the damage possibility simultaneously.
Wherein
The stressed size of arbitrary moment t i root anchor cable, x
MinIt is the minimum stress that should bear by the anchor cable that calculates in conjunction with concrete conditions down-hole.
In such cases, anchor cable is stressed to be lower than the minimum working resistance that should reach, and illustrates that anchor cable can't play the effect that stops roof deformation herein, and anchor cable has the inefficacy may simultaneously.
D (i) is the variance of i root anchor cable suffered stress in a period of time t1 ~ tn,
That i root anchor cable is at time t
mThe time suffered stress intensity,
That i root anchor cable is at a period of time t
1~ t
nThe average of interior suffered stress, C is a constant.
In such cases, i root anchor cable is at a period of time t
1~ t
nIn suffered stress fluctuation larger, exceeded safety factor, illustrate that anchor cable is stressed irregular herein, the ore deposit presses that to manifest variation larger, needs emphasis that herein supporting situation is detected the roof accident that eliminating may occur.
Claims (4)
1. a colliery anchor cable on-line monitoring and early warning system, it is characterized in that: it comprises and is installed on the key position anchor cable pressure sensor (1) that is used for gathering anchor cable (8) stressing conditions, the data acquisition unit (2) that is connected with pressure sensor (1), the master data receiver (3) that is connected with data acquisition unit (2), the master computer (5) that is connected with master data receiver (3); Described pressure sensor (1) is connected with data acquisition unit (2) by data wire, and data acquisition unit (2) is summarized in master data receiver (3) with institute's image data and is connected with aboveground master computer (5) by optical cable (4) afterwards; Draw data processed result by DAS again, when occurring exceeding the situation of safe range, send early warning.
2. anchor cable stressed on-line monitoring in colliery according to claim 1 and early warning system, it is characterized in that: the anchor cable present position of laying pressure sensor (1) is limited to the key position of roof timbering.
3. anchor cable stressed on-line monitoring in colliery according to claim 1 and 2 and early warning system, it is characterized in that: pressure sensor (1) is installed between the pallet (9) and nut (11) of anchor cable (8) exposed parts.
4. anchor cable stressed on-line monitoring in colliery according to claim 1 and early warning system, it is characterized in that: a data collector (2) is placed in each location at underworkings, and each pressure sensor (1) in this location all is connected by data wire with the data acquisition unit (2) in this location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220591519 CN202883017U (en) | 2012-11-09 | 2012-11-09 | Online monitoring and pre-warning system for coal mine anchor cable stress |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220591519 CN202883017U (en) | 2012-11-09 | 2012-11-09 | Online monitoring and pre-warning system for coal mine anchor cable stress |
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| CN202883017U true CN202883017U (en) | 2013-04-17 |
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| CN 201220591519 Expired - Fee Related CN202883017U (en) | 2012-11-09 | 2012-11-09 | Online monitoring and pre-warning system for coal mine anchor cable stress |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612733A (en) * | 2015-03-04 | 2015-05-13 | 北京中水新能工程技术有限公司 | Anchor rod monitoring device and anchor rod using device |
| CN105257315A (en) * | 2015-09-24 | 2016-01-20 | 国网浙江省电力公司宁波供电公司 | Anti-floating structure for underground tunnel |
| CN106121727A (en) * | 2016-08-23 | 2016-11-16 | 辽宁工程技术大学 | A kind of deep tunnel bolt-mesh-anchor support condition monitoring system and method |
| CN107203010A (en) * | 2017-06-05 | 2017-09-26 | 山东理工大学 | Underground space country rock disaster, which is released, and can buffer method of real-time |
| CN107503796A (en) * | 2017-08-23 | 2017-12-22 | 山东科技大学 | A kind of cable bolting back unstability inbreak method for early warning |
| CN112459137A (en) * | 2020-11-16 | 2021-03-09 | 中国矿业大学(北京) | NPR anchor rod monitoring and control system and method for rocky slope collapse disaster |
| CN112963202A (en) * | 2021-02-05 | 2021-06-15 | 中煤科工开采研究院有限公司 | Rock burst monitoring and early warning method and system |
-
2012
- 2012-11-09 CN CN 201220591519 patent/CN202883017U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612733A (en) * | 2015-03-04 | 2015-05-13 | 北京中水新能工程技术有限公司 | Anchor rod monitoring device and anchor rod using device |
| CN105257315A (en) * | 2015-09-24 | 2016-01-20 | 国网浙江省电力公司宁波供电公司 | Anti-floating structure for underground tunnel |
| CN106121727A (en) * | 2016-08-23 | 2016-11-16 | 辽宁工程技术大学 | A kind of deep tunnel bolt-mesh-anchor support condition monitoring system and method |
| CN107203010A (en) * | 2017-06-05 | 2017-09-26 | 山东理工大学 | Underground space country rock disaster, which is released, and can buffer method of real-time |
| CN107503796A (en) * | 2017-08-23 | 2017-12-22 | 山东科技大学 | A kind of cable bolting back unstability inbreak method for early warning |
| CN112459137A (en) * | 2020-11-16 | 2021-03-09 | 中国矿业大学(北京) | NPR anchor rod monitoring and control system and method for rocky slope collapse disaster |
| WO2022042761A1 (en) * | 2020-11-16 | 2022-03-03 | 中国矿业大学(北京) | Npr anchor rod monitoring and control system and method for rock slope collapse disaster |
| CN112963202A (en) * | 2021-02-05 | 2021-06-15 | 中煤科工开采研究院有限公司 | Rock burst monitoring and early warning method and system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20131109 |