CN112983546B - Intelligent coal discharging and coal quantity overload alarm method for all domains - Google Patents
Intelligent coal discharging and coal quantity overload alarm method for all domains Download PDFInfo
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- CN112983546B CN112983546B CN202110235355.9A CN202110235355A CN112983546B CN 112983546 B CN112983546 B CN 112983546B CN 202110235355 A CN202110235355 A CN 202110235355A CN 112983546 B CN112983546 B CN 112983546B
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- 239000003245 coal Substances 0.000 title claims abstract description 216
- 238000007599 discharging Methods 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 238000002474 experimental method Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 14
- 238000005520 cutting process Methods 0.000 claims description 11
- 238000005065 mining Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 2
- 238000004088 simulation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses a global intelligent coal discharging and coal quantity overload alarm method, which comprises the following steps: the method comprises the steps of establishing a coal-discharging software operation program in a comprehensive-discharging working face crossheading centralized control center, sending a coal-discharging command to a bracket electrohydraulic control host through a coal-discharging host of a downhole centralized control center, controlling the bracket to execute the coal-discharging program after the bracket electrohydraulic control host receives the command, issuing and executing the electrohydraulic control program command through an OPC instruction for a staged experiment, realizing automatic coal-discharging execution conditions in a selected area according to a coal-discharging process by the automatic coal-discharging program execution condition of a single bracket, thereby realizing automatic coal-discharging of the whole working face, setting a voice alarm device in a crossheading centralized control center Beck system, starting the Beck voice alarm device when the current of a rear scraper conveyor is monitored to exceed a rated value, reducing the labor intensity of coal-discharging workers, and improving the top coal recovery rate of the comprehensive-discharging working face.
Description
Technical Field
The invention relates to the technical field of intelligent automatic coal discharging of coal mines, in particular to a global intelligent coal discharging and coal quantity overload alarming method.
Background
In the production process of the fully-mechanized caving face of the ultra-thick coal seam, top coal caving is a main production process, and the yield of the face is mainly coal caving, so that the fully-mechanized caving face coal caving work plays an important role in the whole coal mining cycle process. In the production process, especially in the long-time production process of night shifts, the biological clock of people is disturbed, and the fatigue phenomenon is unavoidable. The coal discharging worker can cause uneven coal discharging, large gangue easily enters the rear scraper conveyor, light load, overload or equipment damage accidents of the rear scraper conveyor are caused, and in the process of handling the equipment damage accidents, operators need to enter the rear space of the bracket, so that safety accidents are easy to occur. Aiming at various defects existing in the existing manual coal caving of the fully mechanized caving face, the automatic coal caving technology of the fully mechanized caving face is researched and developed, and the method has important significance for reducing the labor intensity of coal caving workers, reducing the gangue mixing rate, improving the top coal mining rate, the mining efficiency and the like.
The traditional coal discharging mode, namely manual coal discharging, mainly utilizes the rear top coal of a disturbance bracket of a back swing beam to realize the discharging of the top coal by frequently lifting the back swing beam. The manual coal discharge can not accurately control the discharge amount of the top coal of each bracket, and the top coal can not be uniformly sunk and discharged, so that the waste of department coal resources is caused. In addition, the uneven discharge of the roof coal can also cause different supporting strength of each bracket to the roof, so that the roof is stressed unevenly, the roof is easy to break, and roof leakage accidents occur.
At present, in the field of automatic coal caving of fully mechanized caving face, coal gangue recognition, voice recognition and image recognition are mainly used as key technologies for realizing automatic coal caving at home and abroad, but are limited by site factors such as the size of a coal caving hole, the coal caving space, coal dust and the like of a coal mine, and the key technical bottlenecks such as coal gangue recognition, voice recognition and image recognition are not realized all the time.
In the aspect of automatic coal discharge, the time parameters are adjusted by the support electrohydraulic control host computer to automatically discharge coal, so that the monitoring of the rear scraper conveyor cannot be realized, and accidents such as uneven coal discharge, overload and equipment damage are easily caused, so that the coal discharge software for guiding the top coal discharge is necessary to be researched and developed.
Based on the above, the invention designs a global intelligent coal discharging and coal quantity overload alarm method.
Disclosure of Invention
The invention aims to provide a global intelligent coal caving and coal quantity overload alarm method, which is used for meeting the requirement of automatic coal caving of a fully mechanized caving face of a mine, reducing the labor intensity of a coal caving worker, further improving the top coal mining rate and reducing the gangue mixing rate.
In order to achieve the above purpose, the present invention provides the following technical solutions: an intelligent coal discharging and coal quantity overload alarming method in the whole domain comprises the following steps:
s1: the coal discharging host of the crossheading centralized control center of the underground comprehensive coal discharging working face is controlled by automatic coal discharging software, so that the coal discharging function of the bracket is controlled;
s2: the data to be received by the coal discharging host are all obtained from the support electro-hydraulic control host, and the communication adopts an OPC mode to test the execution condition and the existing problems of the single support coal discharging program;
s3: selecting an intelligent coal discharging area on a working surface, executing a multi-round sequential coal discharging process program, and carrying out automatic coal discharging;
s4: the working face adopts automatic coal cutting and automatic frame moving with the machine, or the automatic coal discharging execution condition is carried out after the automatic coal discharging program is started under the condition of manually simulating automatic coal cutting and automatic frame moving with the machine;
s5: a voice alarm device is arranged in a Beck system of a gate centralized control center, and when the current of the rear scraper conveyor is monitored to exceed a rated value, the Beck voice alarm device is started to realize the overload alarm of the coal quantity of a working face.
Further, in step S1, an electrohydraulic control host is installed on the fully-mechanized hydraulic support, a coal placement host is arranged at the centralized control center of the belt gate, and an automatic coal placement program command is issued to the support electrohydraulic control host through an OPC command of the coal placement host, so that the coal placement host controls the coal placement action of the hydraulic support.
Further, in step S2, the data to be received by the coal-discharging host is obtained from the support electro-hydraulic host, and the communication adopts an OPC mode;
the received data includes: the rear scraper machine current, the numerical value of a bracket tail beam travel sensor, the numerical value of a bracket angle sensor, bracket pressure, coal machine position, pushing travel, electrohydraulic control, scraper machine, reversed loader and other stop signals;
the OPC control command includes: support coal discharging time, extension board inserting time, tail beam resetting stroke, tail beam upper swing stroke, tail beam lower swing stroke, board collecting time, coal discharging support number and stop coal discharging support number;
the automatic coal discharge of the experimental single bracket is mainly determined and executed by a time parameter, a tail beam travel parameter, an infrared sensor parameter and the like.
Further, in step S3, the method specifically includes the following steps:
s31, firstly, carrying out a round of sequential coal discharging in a selected intelligent coal discharging area, wherein the test contents comprise: after the coal discharging parameters are issued, whether the bracket response time, the bracket action execution is accurate, the coal discharging time, the plugboard recovery and extension time, the tail boom lower swing and upper swing stroke values, whether the coal discharging stop command is priority, and whether a round of complete coal discharging can be carried out in a selected area according to the sequence;
after the coal discharging test in S32 and S31 is completed, the test contents can be executed smoothly, and a complete round of 'multi-round sequential' coal discharging is started in the selected intelligent coal discharging area.
S33, selecting proper coal caving rounds and coal caving time of each round according to the top coal thickness condition of the fully mechanized caving face, and carrying out experiments by adopting a multi-round sequential coal caving process in a selected designated area of the full mechanized caving face according to designated coal caving intervals.
Further, in step S4, the method specifically includes: the working face adopts automatic coal cutting and automatic frame moving with the machine, or under the conditions of manual simulation of automatic coal cutting and automatic frame moving with the machine, intelligent coal discharging is carried out according to the programmed coal discharging wheel times and the coal discharging time of each wheel, and finally automatic top coal discharging is realized.
Further, in step S5, the method specifically includes: by arranging the rear scraper conveyor current monitoring system in the coal discharging software, when the rear scraper conveyor current value exceeds the rated value, the coal discharging software sends a command to the Beck voice system, and the Beck voice alarm device is started to alarm the overload of the coal quantity of the rear scraper conveyor on the working face.
Compared with the prior art, the invention has the beneficial effects that: the method is beneficial to reducing the labor intensity of coal discharging workers, reducing the gangue mixing rate and improving the top coal mining rate and the mining efficiency; meanwhile, the monitoring of the current of the scraper conveyor is realized, when the current of the rear scraper conveyor is large due to stone blockage or coal overload on the working surface, the coal discharging software receives and recognizes the large current signal of the rear scraper conveyor, and the Beck system voice alarm device is started, so that the monitoring and control of the coal amount of the rear scraper conveyor are realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a block diagram of the coal caving control system of the present invention;
FIG. 3 is a control chart of the operation flow of the support in the state of automatic coal discharge of a single support according to the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 3, the present invention provides a technical solution: the intelligent coal discharge and coal quantity overload alarm method for the whole domain specifically comprises the following steps:
(1) The automatic coal caving software mainly comprises mining information (including working face length, accumulated pushing length, current coal thickness, top coal recovery rate and automatic coal caving rate);
monitoring a coal discharging bracket, and displaying the bracket number and the total number of the bracket which are being automatically discharged in real time in the automatic coal discharging process, wherein the coal discharging bracket also comprises the size of a coal discharging port, the angle of a tail beam and the pressure of a rear column;
the coal mining process monitoring area can click an unlocking button to realize the functions of automatic coal discharging, such as starting and stopping, emergency stopping and resetting.
In the whole coal caving software interface, the most important choice before coal caving is parameter setting.
(2) In a parameter setting interface, most importantly, coal discharging parameters are set, namely coal discharging rounds are mainly selected, (coal is discharged according to a multi-round sequence), and regulations of rounds, safe distance (the safe distance between the coal discharging of the first round and a unit), coal discharging time, triggering distance, inserting plate withdrawing time, inserting plate extending time, tail beam upper swing stroke, tail beam lower swing stroke, tail beam resetting stroke and the like are set in each round.
(3) According to the thickness condition of the top coal, 5 brackets are randomly selected for single bracket instruction receiving and control test through a single bracket test experiment; the test content is that the coal discharging software sends instructions such as a receiving and extending plugboard, a tail beam lower hem, coal discharging time, a tail beam upper hem, tail beam reset and the like to the test support, and whether the support can normally execute is observed; issuing a coal stopping command downwards in the coal discharging executing process, and observing whether the coal discharging bracket can timely stop coal discharging;
finally, determining automatic coal discharging parameters of a single bracket, wherein the time of a plugging plate is 8s, the upper swing stroke of a tail beam is 280mm, the lower swing stroke of the tail beam is 210mm,210 mm-280 mm is the optimal coal discharging opening size under the condition that the bracket stroke meets 3.8m, the coal discharging opening cannot discharge a large block of gangue, the coal discharging time of the bracket is 40s, namely 5 cycles of the upper and lower swings, and the stroke of the tail beam after the bracket finishes coal discharging and returns to the high position is 260mm. Parameter setting of concrete field support controller and state of returning to high position after stopping coal discharging
(4) The automatic program coal feeding in the selected area can be successfully realized through multiple tests, in addition, according to the coal cutting and frame moving distance of the working face support, in order to realize automatic coal cutting and automatic coal feeding in the following state, after the automatic coal feeding program is started, whether automatic coal feeding can be executed is judged according to the acquired position of the coal cutter and the frame moving in-place condition of the support. And the coal caving process is carried out by three rounds according to the condition of the top coal thickness of the working face, and the coal caving time is changed from the previous 60s to the current 40s, so that coal resources can be recovered to the greatest extent.
(5) Under the conditions of automatic coal cutting and automatic frame moving, the coal discharging software can be set according to the coal discharging parameters to realize three-wheel sequential coal discharging. According to the automatic coal discharge test of 7.18-7.24 days a week, 232284t of coal is accumulated by the 7-day whole team, 45 cutters are pushed, and the single cutter yield is 5156.8t. According to the coal detection condition, the average thickness of the coal bed is 14.15m, the average thickness of the gangue is 0.35m, and the average pure coal thickness is 13.8m;
the clean coal reserves per knife (per knife calculated as 0.75 m) are:
Q storage of clean coal per knife ＝251×13.8×0.75×1.46＝3793t
According to the average single-blade yield 5161.8t of the whole team and the average clean coal washing rate of 0.6653, the recovery rate of the top coal of the working face is: 5161.8 × 0.6653 ++3793=90.5% and the recovery of top coal is improved by 3.5% compared with the previous 87%.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The further embodiments of the invention disclosed above are intended only to help illustrate the invention. Further examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (3)
1. The intelligent coal discharge and coal quantity overload alarm method for the whole domain is characterized by comprising the following steps of:
s1: the coal discharging host of the crossheading centralized control center of the underground comprehensive coal discharging working face is controlled by automatic coal discharging software, so that the coal discharging function of the bracket is controlled;
s2: the data to be received by the coal discharging host are all obtained from the support electro-hydraulic control host, and the communication adopts an OPC mode to test the execution condition and the existing problems of the single support coal discharging program;
the received data includes: the rear scraper machine current, the numerical value of a bracket tail beam travel sensor, the numerical value of a bracket angle sensor, bracket pressure, coal machine position, pushing travel and stop signals of electrohydraulic control, scraper machine and reversed loader equipment;
an electro-hydraulic control host is arranged on a fully-mechanized coal mining hydraulic support, a coal placing host is arranged at a belt gate centralized control center, and an automatic coal placing program command is issued to the support electro-hydraulic control host through an OPC command of the coal placing host, so that the coal placing host can control the coal placing action of the hydraulic support; the OPC control command includes: support coal discharging time, extension board inserting time, tail beam resetting stroke, tail beam upper swing stroke, tail beam lower swing stroke, board collecting time, coal discharging support number and stop coal discharging support number;
determining and executing an automatic coal discharging rest time parameter, a tail beam travel parameter and an infrared sensor parameter of a single experimental bracket;
s3: selecting an intelligent coal discharging area on a working surface, executing a multi-round sequential coal discharging process program, and carrying out automatic coal discharging; the method specifically comprises the following steps:
s31, firstly, carrying out a round of sequential coal discharging in a selected intelligent coal discharging area, wherein the test contents comprise: after the coal discharging parameters are issued, whether the bracket response time, the bracket action execution is accurate, the coal discharging time, the plugboard recovery and extension time, the tail boom lower swing and upper swing stroke values, whether the coal discharging stop command is priority, and whether a round of complete coal discharging can be carried out in a selected area according to the sequence;
s32, after the coal discharge test in S31 is completed, the test contents can be smoothly executed, and one round of complete 'multi-round sequential' coal discharge is started in the selected intelligent coal discharge area;
s33, selecting proper coal caving rounds and coal caving time of each round according to the top coal thickness condition of the fully mechanized caving face, and carrying out experiments by adopting a multi-round sequential coal caving process in a selected designated area of the full-face according to designated coal caving intervals;
s4: the working face adopts automatic coal cutting and automatic frame moving with the machine, or under the condition of manually simulating automatic coal cutting and automatic frame moving with the machine, the automatic coal discharging program is started and then experiments are carried out according to the execution condition of automatic coal discharging;
s5: a voice alarm device is arranged in a Beck system of a gate centralized control center, and when the current of the rear scraper conveyor is monitored to exceed a rated value, the Beck voice alarm device is started to realize the overload alarm of the coal quantity of a working face.
2. The global intelligent coal caving and coal quantity overload alarm method according to claim 1, characterized by comprising the following steps: in step S4, specifically, the method includes: the working face adopts automatic coal cutting and automatic frame moving with the machine, or under the conditions of manual simulation of automatic coal cutting and automatic frame moving with the machine, intelligent coal discharging is carried out according to the programmed coal discharging wheel times and the coal discharging time of each wheel, and finally automatic top coal discharging is realized.
3. The global intelligent coal caving and coal quantity overload alarm method according to claim 1, characterized by comprising the following steps: in step S5, specifically, the method includes: by arranging the rear scraper conveyor current monitoring system in the coal discharging software, when the rear scraper conveyor current value exceeds the rated value, the coal discharging software sends a command to the Beck voice system, and the Beck voice alarm device is started to alarm the overload of the coal quantity of the rear scraper conveyor on the working face.
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| CN103256064B (en) * | 2013-05-14 | 2016-04-06 | 天地科技股份有限公司 | A kind of caving roof coal hydraulic support Based Intelligent Control puts coal method |
| CN107091107B (en) * | 2017-05-12 | 2018-11-27 | 河南理工大学 | Intelligent Sub-Level Caving control system and method |
| CN107130989A (en) * | 2017-05-12 | 2017-09-05 | 河南理工大学矿山开发设计研究所 | Hydraulic support of top-coal saving face puts coal method |
| CN111427291A (en) * | 2020-03-24 | 2020-07-17 | 中国矿业大学 | Intelligent control method for special working condition of top coal caving of fully mechanized caving face |
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