CN101852088B - Method for controlling dismantling device - Google Patents
Method for controlling dismantling device Download PDFInfo
- Publication number
- CN101852088B CN101852088B CN 201010110487 CN201010110487A CN101852088B CN 101852088 B CN101852088 B CN 101852088B CN 201010110487 CN201010110487 CN 201010110487 CN 201010110487 A CN201010110487 A CN 201010110487A CN 101852088 B CN101852088 B CN 101852088B
- Authority
- CN
- China
- Prior art keywords
- mining equipment
- gas concentration
- gas
- digging amount
- work plane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- General Factory Administration (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Testing And Monitoring For Control Systems (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention provides a method for controlling a dismantling device along a work face of underground mining. The method involves measuring gas concentration by a gas sensor, and operating a dismantling device in dependence on the result of the measurement. When the gas concentration is close to a predetermined maximum critical value of the gas concentration, the control device keeps the gas concentration inside the work face under the predetermined maximum limit value by reduction of the dismantling quantity of the dismantling device, without stopping the dismantling device, and the excavating depth is decreased by reduction of the dismantling quantity of the dismantling device.
Description
The application is to be that September 4, application number in 2007 are 200710149515.8 the applying date, and denomination of invention is divided an application for the application of the method for mining equipment " be used for drive ".
Technical field
The present invention relates to a kind of method, be used for control along the mining equipment at the work plane of underground mine, wherein come measure gas concentrations by at least one gas sensor, and send alarm signal according to measurement result.
Background technology
This type method is basically open from practice, and is used for determining dangerous gas concentration, particularly unallowed high concentration of methane gas.Can determine the rising of gas concentration in work plane by measure gas concentrations, thereby the alarm signal that can pass through to send realizes early warning.For example this alarm signal can trigger the sense of hearing and/or visual display device, and perhaps this alarm signal is closed the consumer in work plane, in order to make the danger of methane blast drop to minimum.Only have when carrying out that measured methane value reduces again after enough ventilation a period of times, mining operations just can be proceeded.
Problem in the published method is, although used modern monitoring technology, the methane blast still always occurs at present in underground mine, is that operating personnel deliberately carry out artificial improper manipulation to gas sensor to this one of them reason.Therefore known from practice, cover gas sensor in order to improve daily output, perhaps carry air stream to this gas sensor continuously, thereby this gas sensor can not detect in esse gas concentration in work plane.The possible reason of another of gas burst may be that gas sensor produces fault.
Summary of the invention
The object of the invention is to, a kind of method and apparatus is provided, utilize the method and the device can be in artificial improper manipulation or the fault that detects gas sensor in service constantly.
This purpose realizes by the feature of independent claims, and particularly realize thus, namely measure the digging amount by the mining equipment exploitation, it is measure gas concentrations, namely when the underproof correlation determined between the exploitation digging amount measured and the measured gas concentration, send alarm signal.
The present invention is based on following understanding, the methane that is namely produced by coal in exploitation is about at least and the digging amount is proportional.At this, the value of the methane gas that one ton of coal of every exploitation produces for example is about 20m3.Therefore, when the digging amount raise or reduce, measured gas concentration can raise or reduce (usually having in time delay) equally.And then, can measure by the time graph of digging amount relatively and measured gas concentration, between these two measured values, be qualified or underproof correlation.Equally also can detect by comparing absolute value at different time points, there is the artificial improper manipulation to gas sensor in possibility.When the digging amount rises, determine too gas concentration and rise, and the digging amount determines concentration of methane gas and descend too (usually having in time delay) when descending, can think qualified correlation so.Yet, if by covering or spraying artificial this gas sensor of improper manipulation with fresh air, because the gas concentration of measuring does not rely on the fluctuation of digging amount basically, just has so underproof correlation between digging amount and gas concentration.In this case, send alarm signal, so that active ating displaying device or stop exploitation operation for example the reason of alarm signal occurs until get rid of, and guarantees that the concentration of methane gas in work plane is enough low.
An advantageous embodiment of the invention is described in manual, accompanying drawing and dependent claims.
According to favourable embodiment, can calculate the digging amount by speed and the excavation depth of mining equipment.Optional possibility for calculating the digging amount of being exploited is, weighs to the material of exploiting by the ribbon conveyer scale that is arranged on the conveying circuit, perhaps utilizes ultrasonic measurement to calculate delivered volume.Yet the present invention is not limited to described method.
According to one of the inventive method favourable variant, because the methane and the digging amount that are produced by coal are at least approximately proportional, therefore can reduce by the digging amount that reduces mining equipment the methane concentration in the work plane when exploitation.When correspondingly reducing the digging amount, reduced equally by the methane that sprays in the coal, thereby the methane concentration in the work plane can keep below predetermined maximum critical value, and there is no need to stop fully exploitation.When measured gas concentration is enough low, can certainly correspondingly again improve the digging amount of mining equipment.Therefore, in the process that continues, can so regulate the digging amount, namely be no more than or only surpass momently and be scheduled to maximum critical value.In the method according to this invention variant, because digging amount here is at first after exploitation beginning even also rising, so also can detect possible artificial improper operation to gas sensor.Therefore, even under gas concentration remains on predetermined maximum critical value the time, also should be when the digging amount raises and same rising in the gas concentration of work plane inside.If not so, measured gas concentration descends suddenly, the underproof correlation of this meaning person between digging amount and gas concentration, thereby the alarm signal of sending although perhaps be substantially equal to original digging amount.
According to a further aspect in the invention, the present invention relates to a kind of for control along the method in the mining equipment of the work plane of underground mine, wherein by at least one sensor measurement gas concentration, and drive mining equipment based on measurement result.
This method is known in practice, wherein the sensor in known method (with direction of ventilation) is arranged on the buttock, and when measured gas concentration (particularly measured methane concentration) surpassed predetermined critical, mining equipment was stopped fully.When after measured methane value is by enough ventilation regular hours, descending, just again operation of mining equipment in this method.
For in the situation that do not reduce safety in the work plane, improve the productivity ratio of mining operations, when close to the predetermined maximum critical value of gas concentration, by reducing the digging amount of mining equipment, gas concentration in work plane inside is remained under the predetermined maximum critical value, and do not stop mining equipment simultaneously.
Because the methane and the digging amount that are produced by coal when exploitation are at least approximately proportional, so can be reduced in by the digging amount that reduces mining equipment the methane concentration of work plane inside.When correspondingly reducing the digging amount, also reduced by the methane that sprays in the coal, thereby can remain under the predetermined maximum critical value at the methane concentration of work plane inside, and there is no need to stop fully exploitation.When measured gas concentration is enough low, can certainly correspondingly improve the digging amount of mining equipment.Therefore, in the process that continues, can so regulate the digging amount, namely be no more than or only surpass momently and be scheduled to maximum critical value.
On the basis of the digging amount that calculates and measured gas concentration, can calculate the gas content in the material of exploiting, the methane that is wherein spilt by the coal amount of new excavation can be considered to long-pending proportional with the coal body that excavates very approx.Utilization can so be regulated the digging amount corresponding to the gas content of digging amount, namely is no more than predetermined maximum gas concentration, needn't stop mining operations fully simultaneously.In other words, by reducing delivered volume, for example long-pending by reducing exploitation rate or excavation depth, can so reduce the coal body of exploiting, the methane content that namely discharges when exploitation is no more than the threshold of permission.Because do not pre-determine at this methane content that discharges, but at first measure by measurement, utilize the variant of this method, when exploiting, also can notice the methane content of change.
According to another embodiment, can a plurality of gas sensors be set along work plane, methane transducer particularly, wherein so control or detect gas sensor, measured the place before mining equipment when namely in direction of ventilation, moving, should measure the place when moving in contrast to direction of ventilation and after mining equipment, realize.Therefore, different position in work plane inside is measured, wherein in mining equipment with measure spacing approximately constant preferably between the place, in other words, measure the place according to traffic direction with the spacing of approximately constant before mining equipment or mobile afterwards.
Utilize the variant of method of the present invention because measure the place be in mining equipment near, fast detecting goes out dangerous methane and raises basically.In known method, produce the time point of methane excavating coal and measure under will be through about time period of 3 to 5 minutes between the gas concentration, according to the present invention, owing to always measuring near the coal that excavates, measurement result will draw within several seconds on the contrary.In principle, the method according to this invention only also can utilize a gas sensor that is arranged on buttock to implement.
In addition, advantageously, be not to determine predetermined maximum critical value with immobilizing, but dynamically formulate this threshold.Thereby for example advantageously, particularly when measuring at work plane inner (directly forming on the spot in other words) when exceeding, allow only of short duration this threshold that exceeds constantly.When in the buttock setting only during a unique sensor, this sensor measurement is to Methane/air mixture mixing comparatively speaking and that water down by ventilation.In contrast, be bound to occur higher methane concentration along exploitation part, forward position, shut down or minimizing digging amount but this methane concentration needn't cause.
When the position based on mining equipment changes predetermined maximum critical value, be favourable equally.Using in the situation of a unique gas sensor, if measure high methane concentration at buttock, when mining equipment is in work plane at the first bruss, the situation of this high methane concentration is considered to emergency.In contrast, when mining equipment is in the work plane tail end, owing to perhaps only being local in this case and the upward rising of limited methane concentration of time, perhaps can bear high methane concentration.
The impact of mining equipment digging amount can be automatically by the control appliance realization, and for example exploitation rate and/or excavation depth are reduced automatically when gas concentration raises.On the other hand, the gas concentration of rising also can be passed through the visual display device demonstration in work plane inside, in order to inform the driver to mining equipment, thereby this driver must reduce exploitation rate and/or excavation depth.
For example can be on a plurality of positions of work plane inside, signalization device on the per ten exploitation position for example, this recoil simulator is informed the miner, whether measured gas concentration is higher than or is lower than predetermined critical.
According to another aspect of the present invention, the present invention relates to a kind of force piece (Strebausbau), this force piece has a plurality of gas sensors that particularly evenly separate, and wherein these gas sensors can preferably be called respectively by control appliance based on the position of mining equipment.Therefore, when the gas sensor in work plane inside can be connected on the work plane control appliance of original existence, be particularly advantageous.This basically known work plane control appliance is used for control production position, electric hydaulic ground, and this work plane control appliance with its separately adjacent machine and link to each other with central control equipment, by this way, call individually or fully each gas sensor by central control equipment, the extra-pay that is used in simultaneously the methane measurement minimizes.
When between digging amount and gas concentration, being qualified by the control appliance examinations with calculation element or during underproof correlation, be favourable.For example control appliance can utilize the time graph of computer recording exploitation digging amount and measured gas concentration, and to detect existing correlation by suitable algorithm be qualified or defective.For example when in the digging amount after the rising of predetermined time interval surpasses predetermined threshold value, when the rising that identifies gas concentration surpasses another predetermined threshold, can send alarm signal.On the contrary, when measured gas concentration descends, but when finding exploitation digging amount and correspondingly not reducing, can send alarm signal equally.After mining equipment is stopped, must identify the obvious decline of measured methane concentration, even when the decline of this gas concentration can lingeringly occur in time.If for example to the artificial improper operation of carrying out of gas sensor, namely aim at gas sensor and spray the fresh air stream that continues, so measured gas concentration remains unchanged basically, thereby utilize the method according to this invention, determine underproof correlation between digging amount and gas concentration, and then send alarm signal.
Description of drawings
Below, exemplarily the present invention will be described by embodiment and with reference to accompanying drawing.Shown in the figure:
Fig. 1 is the schematic schematic diagram of force piece;
Fig. 2 is the digging amount of exploiting and the measured schematic curve of gas concentration when qualified correlation; And
Fig. 3 is the curve when underproof correlation among Fig. 2.
The specific embodiment
The schematic diagram of the very big simplification of force piece has been shown among Fig. 1, and this force piece has a plurality of exploitation positions 10 that are arranged side by side, and this exploitation position is connected with the conveyer (not shown) in common mode.Label 12 expression mining equipment, this mining equipment can be designed as roller mill (Walze) or coal plough (Hobel).Direction of ventilation utilizes arrow W to show in the diagram, and is distinguished and admirable mobile counterclockwise in schematic diagram 1 in other words.
In order to measure the inner methane concentration that occurs in the path, for example in the per ten exploitation position, methane transducer 14 is set along this work plane, this methane transducer is connected with control appliance 20 by common bus 16.At this, bus 16 can be data/address bus, and the control appliance of each exploitation position 10 utilizes the each other communication of this data/address bus.This external buttock arranges another methane transducer 18.Utilize control appliance 20 (this control appliance can be the central control equipment of each exploitation position 10) can individually control or call gas sensor 14, more precisely according to individually controlling or call gas sensor 14 along the position (these positions are detected by control appliance 20 equally) of the mining equipment 12 of exploiting the forward position.At this, methane transducer 14 is called in this wise or is selected, and namely in mobile mining equipment, when advancing with direction of ventilation, the place of measurement is in before the mining equipment 12, and when when advancing in contrast to direction of ventilation, is in after this mining equipment.In other words, move before mining equipment 12 or afterwards with changeless distance in the place of measurement.
By the communication line (not shown), the speed of mining equipment is delivered on the control appliance 20 on the one hand, the excavation depth of regulating on the other hand is delivered to this control appliance, and this control appliance 20 calculates the digging amount based on this speed and excavation depth, that is to say the quantity of the coal of being exploited.Then this control appliance is determined the methane content of institute's mined material by the digging amount of calculating and measured methane concentration.This calculating is carried out constantly, thereby calculates different gas concentrations when the gas content in the material of exploiting changes.
Fig. 2 shows the digging amount take cubic meter as unit by the control appliance record that is represented by dotted lines very briefly, and shows the gas concentration take percentage as unit by the gas sensor measurement that represents with chain-dotted line.As shown in the figure, along with the rising of digging amount, gas concentration raises too, and this gas concentration is almost being followed the curvilinear motion of digging amount in time.When control appliance was measured this correlation, this correlation was proved to be qualified and does not send alarm signal.
Fig. 3 shows recovery process equally very briefly, in this recovery process, the artificial improper operation to methane transducer occurred in moment t1.Because this manual operation, although the digging amount almost remains unchanged, measured concentration of methane gas sharply descends.At this, for example can derive (Ableitung) gas concentration signal by the very first time and the image of the exploitation digging amount measured is determined by control appliance, these two measured values are not in almost identical situation, thereby can send alarm signal.
In addition, control appliance 20 is calculated specified digging amount on the basis of the gas content of calculating in advance, and the exploitation of this specified digging amount has caused a gas concentration, and this gas concentration is under the predetermined maximum gas concentration (marking with max in Fig. 3).When the methane content of the coal of for example exploiting improved, control appliance 20 automatically reduced exploitation rate and/or excavation depth, and then did not reach predetermined maximum methane concentration, as shown in Figure 3.
Selectively or additionally, control appliance 20 can be controlled different visual display devices, this display device is arranged on the inside of work plane, for example is arranged on again the per ten backplate place, and this display device also can be connected on the control appliance of exploitation position.This visual displays for example can have the signal optical source of three kinds of different colors, wherein green glow represents that measured methane concentration is lower than threshold value, red light source can represent that concentration has reached threshold value, and yellow light sources can represent that measured methane concentration is near threshold value.By this way, the operator of mining equipment can manually, for example correspondingly adjust the digging amount by reducing exploitation rate or excavation depth.
Utilize the method according to this invention or according to device of the present invention, can be constantly and without interruptedly so control production operation, namely do not reach the methane threshold by changing the digging amount.Simultaneously, in the situation that consider methane content, make digging amount optimization, and can identify the artificial improper manipulation to gas sensor.
Claims (18)
1. one kind is used for control along the method in the mining equipment of the work plane of underground mine, wherein by at least one gas sensor measure gas concentrations, and drive mining equipment based on measurement result, it is characterized in that, when close to the predetermined maximum critical value of gas concentration, by the digging amount that reduces described mining equipment the gas concentration in work plane inside is remained under the described predetermined maximum critical value by control appliance, and need not to stop described mining equipment, and in order to reduce the digging amount minimizing excavation depth of mining equipment.
2. method according to claim 1 is characterized in that, calculates described digging amount by speed and the excavation depth of described mining equipment, and is calculated the gas content of institute's mined material by the described digging amount of calculating and measured described gas concentration.
3. method according to claim 1, it is characterized in that, along described work plane a plurality of described gas sensors are set, and when described mining equipment advances with direction of ventilation, measuring the place realized before described mining equipment, when advancing in contrast to direction of ventilation, then realize after described mining equipment in described measurement place in described mining equipment.
4. method according to claim 1, it is characterized in that, when described mining equipment advances with direction of ventilation, measuring the place realized before described mining equipment with constant spacing, when advancing in contrast to direction of ventilation, then realize after described mining equipment with constant spacing in described measurement place in described mining equipment.
5. method according to claim 1 is characterized in that, described gas sensor is arranged on buttock.
6. method according to claim 1 is characterized in that, changes described predetermined maximum critical value according to the position of described mining equipment and/or according to temporal fluctuation.
7. method according to claim 1 is characterized in that, shows in the described work plane whether measured gas concentration approaches or reach the described predetermined maximum critical value of described gas concentration.
8. method according to claim 7 is characterized in that, shows by visual display device whether measured gas concentration approaches or reach described default maximum gas concentration in the described work plane and passes through visual display device.
9. method according to claim 7 is characterized in that, carries out in the described work plane of being presented at of a plurality of positions inside.
10. be used for implementing the force piece of method according to claim 1, described force piece comprises mining equipment (12) and a plurality of exploitations position (10), it is characterized in that, along described force piece a plurality of gas sensors (14) are set.
11. force piece according to claim 10 is characterized in that, described gas sensor (14) is separated equably.
12. force piece according to claim 10 is characterized in that, described gas sensor (14) is called respectively by control appliance (20) based on the position of described mining equipment (12).
13. force piece according to claim 10 is characterized in that, in direction of ventilation, extra gas sensor (18) is arranged on the end of described work plane.
14. force piece according to claim 10 arranges visual display device in a plurality of exploitations position (10), utilizes described visual display device to show, measured gas concentration whether close to or reach predetermined maximum gas concentration.
15. force piece according to claim 10, it is characterized in that, each described exploitation position (10) has an electrical control equipment, the control appliance that described electrical control equipment is adjacent carries out communication, and described gas sensor (14) is connected at least some described control appliances.
16. be used for the control appliance of force piece according to claim 10, it is characterized in that, described control appliance is provided with calculation element, utilize described calculation element to calculate the digging amount according to speed and the excavation depth of mining equipment (12), and utilize described calculation element to be calculated the gas content of mined material by the described digging amount of calculating and measured described gas concentration.
17. control appliance according to claim 16 is characterized in that, comprising:
Calling device utilizes described calling device one by one to call a plurality of sensors (14), and input unit is used for pre-entering the maximum gas concentration value,
Comparison means utilizes described comparison means to calculate measured gas concentration and predetermined maximum gas concentration, and
Output, described output relatively comes output display signal and/or control signal according to this.
18. control appliance according to claim 16, it is characterized in that, described calculation element is set, utilizes described calculation element to calculate specified digging amount according to the gas content of calculating, then cause gas concentration to maintain under the predetermined maximum gas concentration with described specified digging amount exploitation.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006041570.1 | 2006-09-05 | ||
| DE102006041570.1A DE102006041570B4 (en) | 2006-09-05 | 2006-09-05 | Method for controlling a mining device, longwall construction for carrying out the method and control for such a longwall construction |
| DE200710014662 DE102007014662B4 (en) | 2007-03-27 | 2007-03-27 | Method for operating a mining device, longwall construction for carrying out the method and control for such a longwall construction |
| DE102007014662.2 | 2007-03-27 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101495158A Division CN101139938B (en) | 2006-09-05 | 2007-09-04 | Method and equipment for driving mining device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101852088A CN101852088A (en) | 2010-10-06 |
| CN101852088B true CN101852088B (en) | 2013-01-30 |
Family
ID=40528267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010110487 Expired - Fee Related CN101852088B (en) | 2006-09-05 | 2007-09-04 | Method for controlling dismantling device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101852088B (en) |
| RU (1) | RU2374444C2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777212A (en) * | 2012-08-10 | 2012-11-14 | 中国建筑第四工程局有限公司 | Monitoring method of tunnel gas |
| CN103216232B (en) * | 2013-04-09 | 2015-05-20 | 中国矿业大学 | Method for automatically regulating and controlling transportation load of high-gas coal face |
| BE1027207B1 (en) * | 2019-04-03 | 2020-11-23 | Thyssenkrupp Ind Solutions Ag | Method and device for the automatable operation of a material extraction system on the mining front of a material extraction site |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2213858A (en) * | 1987-12-17 | 1989-08-23 | Coal Ind | Equipment and method for measuring convergence |
| US5087099A (en) * | 1988-09-02 | 1992-02-11 | Stolar, Inc. | Long range multiple point wireless control and monitoring system |
| CN1096846A (en) * | 1993-06-25 | 1994-12-28 | 于斌 | Coal mine gas monitoring and controlling system |
| PL318237A1 (en) * | 1997-01-30 | 1997-07-21 | Glowny Instytut Gornictwa | Electronic circuit arrangement of a conductometric meter for measuring co 2, co and ch4 content in gases |
| UA61611A (en) * | 2003-03-17 | 2003-11-17 | Vasyl Viktorovych Bilonozhko | System for controlling inflammable gas content in mine atmosphere |
| CN2761848Y (en) * | 2005-01-21 | 2006-03-01 | 陕西恒润科技发展有限公司 | Mine alarm positioning device |
| CN2787839Y (en) * | 2005-05-23 | 2006-06-14 | 辽宁工程技术大学 | Multi-source information gas monitoring instrument |
| CN1786422A (en) * | 2005-11-29 | 2006-06-14 | 李铁顺 | Method and system for monitoring gas in mine |
-
2007
- 2007-09-04 CN CN 201010110487 patent/CN101852088B/en not_active Expired - Fee Related
- 2007-09-04 RU RU2007133239/03A patent/RU2374444C2/en not_active IP Right Cessation
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2213858A (en) * | 1987-12-17 | 1989-08-23 | Coal Ind | Equipment and method for measuring convergence |
| US5087099A (en) * | 1988-09-02 | 1992-02-11 | Stolar, Inc. | Long range multiple point wireless control and monitoring system |
| CN1096846A (en) * | 1993-06-25 | 1994-12-28 | 于斌 | Coal mine gas monitoring and controlling system |
| PL318237A1 (en) * | 1997-01-30 | 1997-07-21 | Glowny Instytut Gornictwa | Electronic circuit arrangement of a conductometric meter for measuring co 2, co and ch4 content in gases |
| UA61611A (en) * | 2003-03-17 | 2003-11-17 | Vasyl Viktorovych Bilonozhko | System for controlling inflammable gas content in mine atmosphere |
| CN2761848Y (en) * | 2005-01-21 | 2006-03-01 | 陕西恒润科技发展有限公司 | Mine alarm positioning device |
| CN2787839Y (en) * | 2005-05-23 | 2006-06-14 | 辽宁工程技术大学 | Multi-source information gas monitoring instrument |
| CN1786422A (en) * | 2005-11-29 | 2006-06-14 | 李铁顺 | Method and system for monitoring gas in mine |
Non-Patent Citations (1)
| Title |
|---|
| 贾鹏昆.望儿山金矿全尾砂高浓度充填新技术研究.《工程科技I辑》.2005, * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101852088A (en) | 2010-10-06 |
| RU2007133239A (en) | 2009-03-10 |
| RU2374444C2 (en) | 2009-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103434816B (en) | Scraper conveyer chain condition monitoring and protection system | |
| CN101852088B (en) | Method for controlling dismantling device | |
| CN104555343B (en) | A kind of underground coal mine coal-face self-adapting intelligent drag conveyor | |
| CN105293078B (en) | Cigarette machine wire-feeding pipe wind speed balance method and unit control apparatus | |
| CN101139938B (en) | Method and equipment for driving mining device | |
| CN101418688A (en) | Intelligent full automatic combine coal mining system | |
| CN103216266A (en) | Pressure detecting method for preventing clogging of filling pipeline | |
| CN105300097A (en) | Detecting device for rollers of roller kiln | |
| CN106379708B (en) | A kind of coal stream equalising control device and its control method | |
| TW200626124A (en) | Air-Massager Anomaly Detecting System | |
| AU2012369561A1 (en) | Method of assessing dust controls in mining | |
| CN107702755A (en) | Belt conveyor flow detector and detection method | |
| CN202039099U (en) | Strip breakage protective device of silicon steel continuous annealing machine set | |
| CN206705159U (en) | A kind of mine belt conveyor monitoring device safe for operation | |
| KR20130024533A (en) | Fire detection apparatus and system | |
| CN205156609U (en) | Roller kilns roller stick detection device | |
| KR101032554B1 (en) | System and method for measuring discharging speed of molten iron and liquid level using molten iron detecting sensor | |
| CN205820258U (en) | Upper embryo detection alarm device | |
| CN201766344U (en) | Alarm system | |
| CN101649960A (en) | Portable lamp and failure monitoring system used for mine operation | |
| CN114560256A (en) | Scraper conveyor fault detection method and system and storage medium | |
| CN210863893U (en) | Cable terminal fault on-line monitoring device | |
| CN201827901U (en) | Coal feeding system capable of judging coal blockage and coal interruption | |
| CN203199603U (en) | Belt anti-fracture monitoring device | |
| CN207566379U (en) | A kind of belt feeder belt protective device against longitudinal tear, comprehensive protector and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20190904 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |