CN110130990B - Gas overrun early warning system and method - Google Patents
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- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- E—FIXED CONSTRUCTIONS
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Abstract
The invention discloses a gas overrun early warning system and a gas overrun early warning method. The gas overrun early warning system analyzes gas concentration data in real time and manually inputs early warning data through a gas overrun early warning comprehensive management platform, calculates an early warning result by using an early warning model, and issues gas overrun early warning information through a gas overrun early warning information issuing system. By the gas overrun early warning system and the gas overrun early warning method, influence factors which possibly cause gas overrun, such as the excavation footage, the gas concentration change and the tunneling of mine functional departments, the conditions of stope faces (coal bed occurrence, geological structure, ventilation and management factors) and the like, can be subjected to integrated management and comprehensive analysis, the real-time grading early warning of the gas overrun of mines is realized, the occurrence probability and the safety management cost of gas overrun accidents of the mines are effectively reduced, and the safety production of the mines is guaranteed. The existing underground looped network and the mining area local area network are utilized to connect the gas overrun early warning integrated server with the existing coal mine safety monitoring system and the mine manual data acquisition system.
Description
Technical Field
The invention relates to the technical field of coal mine safety, in particular to a gas overrun early warning system and a gas overrun early warning method.
Background
Gas disasters are one of the major disasters in coal mine safety production. Among them, coal and gas outburst and gas explosion are the most serious. Coal and gas outburst is a very complex power phenomenon that a large amount of coal and gas are suddenly sprayed from the inner part of a coal wall to a mining space in a very short time from a coal body containing gas in a coal mine. The coal mine underground coal mine underground coal mine. The mine gas explosion is essentially a violent oxidation reaction generated under the action of certain temperature due to the interaction of certain concentration of methane and oxygen in the air. Once the occurrence happens, not only a great deal of casualties can be caused, but also mine facilities can be seriously destroyed, and the production is interrupted; even secondary accidents such as coal dust explosion, mine fire and the like can be caused, so that disasters are aggravated and huge losses are caused. In 11000 mines in China, over 95% of coal mines are mined by adopting well work, high-gas and coal and gas outburst mines account for over 50%, coal mine safety accidents such as gas suffocation, gas explosion and coal and gas outburst are easy to happen to the high-gas mines, and particularly the coal and gas outburst accidents have the characteristics of high destructiveness, high complexity, low predictability and the like, so that the method is an urgent major safety problem to be solved in the production process of the coal mines at present. Therefore, the research and the mastering of the mine gas accident occurrence reason and the prevention and treatment technology thereof have very important significance for the mine safe production and the guarantee of the life safety of miners.
After decades of gas accident mechanism researches and field practices, China forms a four-in-one comprehensive outburst prevention measure technical system which integrates outburst risk prediction, outburst prevention measures, outburst prevention measure effect inspection and safety protection measures. In addition, according to the accident cause theory, three basic conditions of temperature, oxygen concentration and gas concentration of mine gas explosion are comprehensively analyzed, so that the mine gas explosion prevention and control are obtained, the underground gas accumulation of the coal mine is prevented, and the occurrence of gas overrun accidents is avoided. The four-in-one comprehensive outburst prevention system is implemented, the gas concentration of each underground wind using place is strictly controlled, various gas disasters are effectively prevented and controlled, and due to the insufficient understanding of the gas disaster mechanism and the complexity of the production field, the gas disasters cannot be completely eradicated at present.
The coal mine safety monitoring system and the outburst risk prediction are important technical means for preventing and controlling mine gas overrun and coal and gas outburst. At present, in China, a high-gas outburst mine mainly monitors and forecasts the gas concentration of each operation place of the mine by a coal mine safety monitoring system, the outburst risk of a coal seam area is forecasted in a drilling mode to the coal seam, and outburst prevention measures are taken for dangerous areas or working faces to eliminate the outburst risk. However, the existing coal mine safety monitoring system and the existing outburst risk prediction method still have the defects and the places to be improved: firstly, relative isolation exists between gas concentration monitoring and forecasting and outburst danger forecasting indexes, and comprehensive intelligent prediction on gas disasters on a working face cannot be carried out; secondly, the existing gas disaster monitoring system cannot generally feed back the real-time operation conditions of a coal seam area or a working surface, such as coal seam occurrence, geological structure, ventilation and drilling gas change conditions, and is not beneficial to real-time early warning of gas disasters; the existing gas disaster prediction method mostly only considers objective gas overrun indexes and outburst risk prediction indexes to carry out gas disaster prediction, and ignores the mine management level and the execution condition of outburst prevention measures which play a role in determination; the existing gas disaster prediction methods mostly use prediction indexes to give prediction results absolutely, and cannot subdivide the gas disaster grade of the working face and the gas disaster occurrence trend of the advanced working face under the accumulation effect of various early warning grades.
At present, in the aspect of coal mine safety monitoring systems, a German TF-200 gas monitoring system, a Poland CMM-20 gas monitoring system, an American SCADA gas monitoring system and the like are mainly arranged abroad. The KJ90 coal mine safety comprehensive monitoring system of the Chongqing coal academy, the KJ95 coal mine monitoring system of the Changzhou automation division company of the Tiandi science and technology shares company, the KJF338 mine safety production comprehensive monitoring system of the Shenyang coal academy, the KJ4/KJ2000 system of the Beijing ruisai company and other systems are widely applied to most high gas and outburst mines in China. The aspects of software and hardware functions, system stability, reliability and the like represent the technical level of the coal mine monitoring system in China. Particularly, a digital mine database is established in the Chongqing coal academy on the basis of a Geographic Information System (GIS), a coal and gas outburst risk early warning index is established, trend early warning and disaster-impending early warning are carried out on the coal and gas outburst, and a solid foundation is laid for further research of a gas disaster early warning system. However, in the mine gas disaster early warning system, further research is still needed in the aspects of real-time data entry of the mine working face, early warning and prediction index interaction relation and early warning system architecture.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method and a system for performing gas overrun early warning by using gas concentration information acquired in real time and manually input information, and the related safety information is monitored, analyzed and early warned in real time, so that corresponding gas disaster prevention measures are taken for mines, and a basis is provided for gas disaster prevention and control.
The technical scheme adopted by the invention for realizing the purpose is as follows: a gas overrun early warning system comprises:
the gas overrun early warning comprehensive management platform is used for acquiring gas concentration data of a mine, excavation footage, geological measurement, outburst prevention indexes and gas data of a coal seam of an underground working face, uploading the acquired data to a gas overrun early warning database in a gas overrun early warning comprehensive server, and is also used for setting early warning rules of the mine, issuing early warning results, relieving early warning, performing gas early warning judgment in the gas overrun early warning database according to the early warning rules and issuing judgment results through a gas overrun early warning information issuing system;
the gas overrun early warning integrated server is used for establishing a gas overrun early warning database of a mine; the gas overrun early warning database is used for storing gas overrun early warning data of a mine and is also used for calculating and judging an early warning result;
the gas overrun early warning information publishing system is connected with the gas overrun early warning comprehensive management platform and used for publishing network information of mine gas overrun comprehensive early warning results.
The gas over-limit early warning comprehensive management platform is connected with a working face gas emission dynamic characteristic management system, and the working face gas emission dynamic characteristic management system is connected with a monitoring system through monitoring system interface software; the monitoring system is used for reading gas concentration data of a mine in real time and uploading the data to the working face gas emission dynamic characteristic management system through the monitoring system interface software.
The working face gas emission dynamic characteristic management system is used for displaying, inquiring and dynamically analyzing the data to be calibrated, managing the gas sensor which normally works and is calibrated, and simultaneously performing modeling processing on the data hidden information.
The gas overrun early warning data comprises gas, geology, production, early warning rules and early warning results.
The gas overrun early warning comprehensive management platform is connected with a working face excavation progress management system, a working face geological measurement management system, a working face dynamic outburst prevention management system and an underground data input terminal;
the working face excavation progress management system is used for recording the working face mining footage daily report and the tunneling footage daily report, and realizing dynamic management of the mine excavation progress;
the working face geological measurement management system is used for managing a new excavation roadway and a stope working face of a mine, recording a geological structure in real time and realizing dynamic management of the new and old roadways, the working faces and the geological structure of the mine;
the working face dynamic outburst prevention management system is used for recording early warning indexes of gas overrun of each working face of a mine in real time, generating a full mine gas geological map and realizing dynamic management of the full mine gas overrun information from a local part to an area;
the underground data input terminal is used for recording abnormal conditions of coal seam occurrence, geological structure, ventilation, management factors and gas data of underground tunneling and stoping working faces in real time and transmitting the abnormal conditions to the working face early warning management system connected with the gas overrun early warning management sub-platform through an underground looped network.
A gas overrun early warning method comprises the following steps:
acquiring gas concentration data of a mine, and excavating footage, geological measurement, outburst prevention indexes and underground working face coal seam gas data;
uploading the acquired data to a gas overrun early warning database in a gas overrun early warning comprehensive server; the gas overrun early warning integrated server is used for establishing a gas overrun early warning database of a mine; the gas overrun early warning database is used for storing gas overrun early warning data of a mine;
calculating and judging the early warning result according to the corresponding early warning rule in the gas overrun early warning database;
and network information is issued to the mine gas overrun comprehensive early warning result through a gas overrun early warning information issuing system.
The method for acquiring the gas concentration data of the mines, the excavation footage, the geological measurement, the outburst prevention indexes and the gas data of the coal seam of the underground working face comprises the following steps:
reading gas concentration data of a mine in real time;
mine excavation footage, geological survey, outburst prevention indexes and field input of underground working face coal bed gas data.
The method for realizing calculation and judgment of the early warning result according to the corresponding early warning rule in the gas overrun early warning database comprises the following steps:
according to the gas emission quantity change condition of each working face analyzed by the working face gas emission dynamic characteristic management system, and according to a preset gas overrun rule, sending out gas overrun early warning information;
sending out gas overrun early warning information according to the gas overrun index according to the gas pressure, the gas content and the gas geological map in the dynamic outburst prevention system;
according to coal seam occurrence characteristics, geological structures, ventilation and management factors which are input in real time by an underground data input terminal, the relative distances between the front of a working face and coal seam occurrence abnormal areas, geological structure zones and gas abnormal areas are judged by combining tunneling and stoping footage data information of the working face in a mining progress management system, and gas overrun rule judgment is carried out by combining ventilation measure formulation and management factors, so that gas overrun early warning information is sent out.
According to each working face gas emission quantity change condition of working face gas emission dynamic characteristic management system analysis to according to predetermined gas overrun rule, send out gas overrun early warning information, specifically do: when the gas concentration meets the overrun early warning rule that T1 is more than or equal to 1%, "T2 is more than or equal to 0.7%," T7 maximum value is more than or equal to 1.6%, "or the gas concentration change value is more than or equal to 0.3% under the same process condition in one class, immediately performing the overrun yellow early warning on the gas in the whole mine; when the T1 is more than or equal to 1.2 percent, the T2 is more than or equal to 0.8 percent or the gas concentration change value is more than or equal to 0.4 percent under the same working procedure condition within one class, the red over-limit early warning of the gas in the whole mine is carried out in real time; wherein, T1 is the working face gas sensor value, T2 is the return airway gas sensor value, T7 is the special gas exhaust airway sensor value;
according to gas pressure, gas content and gas geological map among the dynamic outburst prevention system, according to the gas overrun index, send out gas overrun early warning information, specifically do: when the gas pressure and the gas content value reach the over-limit early warning rule of W being more than or equal to 7.5 and less than 8m3Or P is more than or equal to 0.7 and less than 0.74MPa, and performing yellow ultralimit early warning on the gas of the whole mine in real time; when W is more than or equal to 8m3The/t or the P is more than or equal to 0.74MPa, and the red warning of the gas overrun of the whole mine is carried out immediately; wherein W is the gas content and P is the gas pressure;
according to coal seam occurrence characteristics, geological structure, ventilation and management factors input in real time by the underground data input terminal, tunneling and stoping footage data information of a working face in the mining progress management system is combined, the relative distance between the working face and a coal seam occurrence abnormal area, a geological structure area and a gas abnormal area in front is judged, ventilation measures are combined to make and manage the factors, gas overrun rule judgment is carried out, and gas overrun early warning information is sent out, and the method specifically comprises the following steps: when the tunneling and stoping working face is positioned within the range of 20m of a geological structure zone, within the range of 50m of ground drilling or the top plate is broken, performing gas over-limit yellow early warning; when the coal layer of the driving face is disordered, the trend of the coal layer and the dip angle are suddenly changed sharply or the damage type of the coal body is changed from I and II type coal into III type coal, IV type coal and V type coal, the early warning of the overlimit yellow of gas is sent out immediately; when the working face has areas with wind stoppage, breeze and wind flow reversal or the ventilation section is smaller than the design section 2/3, performing gas over-limit yellow early warning; in the gas management of a stoping and driving working face, when the problems of gas, abnormal geological structure, no report, artificial damage of ventilation facilities and the like occur, the gas over-limit yellow early warning is carried out; and when the monitoring and monitoring system is found to be out of operation or gas control measures are not executed, carrying out red early warning of gas overrun in real time.
Further comprising:
the multi-index superposed gas overrun comprehensive grading early warning of two or more single-index early warnings is realized: and when two or more yellow early warning indexes are met simultaneously, two or more yellow early warnings can be upgraded to a gas over-limit red early warning.
The method fully utilizes the called real-time gas concentration information and the manually input information to carry out early warning, and manages and analyzes the factors which possibly cause the gas overrun of the working face, such as the mining footage of each part of the mine, the gas index change, the working face condition (coal bed occurrence, geological structure, ventilation, management factors) and the like by combining with the newly developed underground data input terminal, thereby realizing the real-time grading early warning of the gas overrun of the mine, effectively reducing the occurrence probability of the gas overrun accident of the mine and ensuring the safety production of the mine.
Drawings
FIG. 1 is a schematic diagram of a gas overrun early warning system;
FIG. 2 is a key index diagram of the gas overrun warning method;
FIG. 3 is a diagram of a mining face overrun gas and geological structure double-index stacking grading early warning model;
FIG. 4 shows a gas pre-warning flow chart.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the gas overrun early warning system of the present embodiment includes:
the gas overrun early warning integrated management platform 1 (copyright registration number: 2016SR055229) is used for maintaining gas overrun real-time early warning data and early warning rule systems in a gas overrun early warning database in a gas overrun early warning integrated server of a group company, managing a mine early warning subsystem, making specific early warning rules of a mine, issuing early warning results, relieving early warning, and uploading the early warning rules to the gas overrun early warning database in the gas overrun early warning integrated server;
the gas overrun early warning database 2 is used for storing data related to the gas overrun early warning of the mine;
the gas overrun early warning comprehensive server 3 is used for establishing a gas overrun early warning database;
and the gas overrun early warning information release system 4 (copyright registration number: 2016SR087185) is used for network information release of the mine gas overrun comprehensive early warning result.
The monitoring system 5 includes:
the monitoring system 5(KJ333 coal mine safety production monitoring system, safety mark number: MFC070106) is used as an important data source of the gas overrun comprehensive early warning system, can read the gas concentration data of the mine in real time, and uploads the gas overrun early warning data to a gas overrun early warning database in a gas overrun early warning comprehensive server;
the monitoring system interface software 6 is used as analysis software of monitoring system data, and transmits the analyzed data to a working face gas emission dynamic characteristic management system;
a working face gas emission dynamic characteristic management system 7 (copyright registration number: 2016SR053982) which displays, inquires and dynamically analyzes the data to be regulated, manages the normally working and regulated gas sensor, and simultaneously performs modeling processing on the implicit information of the data;
since the manufacturers of the coal mine safety monitoring system 5 are not uniform and cannot directly acquire data, the data are indirectly acquired by adopting a data analysis mode of the monitoring system interface software 6, and the monitoring system interface software 6 is used for reading the gas concentration data of a mine in real time and uploading the data to the working face gas emission dynamic characteristic management system 7.
The working face excavation progress management system 8, the working face geological measurement management system 9, the working face dynamic outburst prevention management system 10 and the underground data input terminal 11 are used for field input of mine excavation footage, geological measurement, outburst prevention indexes and underground working face coal seam gas data and upload the data to a gas overrun early warning database in a gas overrun early warning comprehensive server; the method specifically comprises the following steps:
the working face excavation progress management system 10 (copyright registration number: 2016SR053394) is used for recording the working face mining footage daily report and the tunneling footage daily report, and realizes the dynamic management of the mine excavation progress;
the working face geological measurement management system 11 (copyright registration number: 2016SR053177) is used for managing a new excavation roadway and a stope face of a mine, and recording geological structures such as faults, collapse columns and the like in real time to realize dynamic management of the new and old roadways, the working faces and the geological structures of the mine;
the working face dynamic outburst prevention management system 12 (copyright registration number: 2016SR053401) is used for real-time input of mine working face gas overrun early warning indexes and can automatically generate a full mine gas geological map;
the underground data input terminal 13 is used for recording abnormal conditions of underground tunneling, coal seam occurrence of a stope face, geological structure, ventilation, management factors and gas data in real time and uploading the abnormal conditions to the gas overrun early warning comprehensive management platform in time through an underground looped network;
the early warning process is as shown in fig. 4, and includes data acquisition including automatic acquisition and manual entry by the monitoring system, judgment of early warning rules, output of early warning results, and issuance of early warning results.
The gas overrun early warning method specifically comprises the following steps:
1) data acquisition of mine gas overrun data
Monitoring center personnel carry out information interconnection between a coal mine safety monitoring system and a working face gas emission dynamic characteristic management system through a mining area local area network, automatically read real-time data of mine gas concentration in real time, regularly adjust and update according to the working condition of a gas sensor in the monitoring system, and upload the data to a gas overrun early warning database in a gas overrun early warning comprehensive server;
production progress management personnel of a production department input the driving and stoping working face footage and related information into a gas overrun early warning database in a gas overrun early warning comprehensive server through a working face excavation progress management system and are responsible for maintaining the excavation progress management system;
a geological measurement manager of the geological survey department inputs mine geological survey data into a gas overrun early warning database in a gas overrun early warning comprehensive server through a working face geological measurement management system and is responsible for maintaining the geological measurement management system;
an outburst prevention management worker of the ventilation department inputs the gas pressure and the gas content value of the mine working face into a gas overrun early warning database in a gas overrun early warning comprehensive server through a working face dynamic outburst prevention management system to generate a coal bed gas geological map and takes charge of the dynamic outburst prevention management system;
a technical staff of a downhole working face team of a production department inputs abnormal conditions of data such as coal seam occurrence, geological structure, ventilation, management factors and gas into a gas overrun early warning database in a gas overrun early warning comprehensive server through a downhole data input terminal, and an electromechanical department is responsible for maintenance of downhole and uphole early warning equipment and lines.
2) Mine gas overrun real-time grading early warning
And the gas overrun management personnel of the ventilation department add gas overrun early warning rules into a gas overrun early warning database in the gas overrun early warning comprehensive server through a gas overrun early warning comprehensive management platform, supervise the running conditions of other early warning subsystems, issue early warning results, formulate response measures and track implementation. The method specifically comprises the following steps:
(1) the gas overrun early warning comprehensive management platform generates a mine dynamic excavation engineering plan based on a network geographic information system according to spatial information and attribute information of geological exploration drilling holes, gas extraction drilling holes and underground coal bed, geological structures, working faces and roadway measurement data in geological measurement data, and provides a basic platform for mine gas overrun early warning management;
(2) the gas over-limit early warning integrated management platform generates a coal bed gas geological map and contour lines of gas pressure, gas content and gas emission quantity according to the actual measurement of the gas pressure, gas content and gas emission quantity of the underground working surface through a working surface gas emission dynamic characteristic management system and a working surface dynamic outburst prevention management system, and generates the coal bed gas geological map based on a network geographic information system;
(3) therefore, according to abnormal gas emission quantity, mining influence caused by mining activities, over-limit prediction indexes, coal bed occurrence, geological structure, ventilation and management factors input by an underground terminal, comprehensive early warning of single-index early warning and double-index superposition is carried out, and gas over-limit grading early warning information is sent out;
the specific gas overrun early warning process is carried out in the gas overrun early warning database 2, and comprises the following steps:
firstly, a gas overrun early warning comprehensive management platform intelligently analyzes the change condition of the gas emission quantity of each working face according to a working face gas emission dynamic characteristic management system and sends out gas overrun early warning information according to a preset gas overrun rule; specifically, when the gas concentration meets the overrun early warning rule of 'T1 is more than or equal to 1.0%', 'T2 is more than or equal to 0.7%', 'T7 maximum value is more than or equal to 1.6%', or the gas concentration change value is more than or equal to 0.3% under the same working procedure condition in one class, the overrun yellow early warning of the whole mine gas is immediately carried out; when the T1 is more than or equal to 1.2 percent, the T2 is more than or equal to 0.8 percent or the gas concentration change value is more than or equal to 0.4 percent under the same working procedure condition within one class, the red over-limit early warning of the gas in the whole mine is carried out in real time;
secondly, the gas overrun early warning comprehensive management platform sends out gas overrun early warning information according to the gas pressure, the gas content and a gas geological map in the dynamic outburst prevention system and the gas overrun index; specifically, when the gas pressure and the gas content value reach the over-limit early warning rule of W being more than or equal to 7.5 and less than 8m3Or P is more than or equal to 0.7 and less than 0.74MPa, and performing yellow ultralimit early warning on the gas of the whole mine in real time; when W is more than or equal to 8m3The/t or the P is more than or equal to 0.74MPa, and the red warning of the gas overrun of the whole mine is carried out immediately;
thirdly, the gas overrun early warning comprehensive management platform judges the relative distance between the front part of the working face and a coal seam occurrence abnormal area, a geological structure area and a gas abnormal area according to coal seam occurrence characteristics, geological structures, ventilation and management factors recorded in real time by the underground data input terminal and by combining tunneling and stoping footage data information of the working face in the mining progress management system, and judges a gas overrun rule by combining ventilation measure formulation and management factors to send out gas overrun early warning information;
specifically, when the tunneling and recovery working face is located within the range of 20m of a geological structure zone, within the range of 50m of ground drilling or a roof is broken, gas over-limit yellow early warning is carried out; when the coal layer of the driving face is disordered, the trend of the coal layer and the dip angle are suddenly changed sharply or the damage type of the coal body is changed from I and II type coal into III type coal, IV type coal and V type coal, the early warning of the overlimit yellow of gas is sent out immediately; when the working face has areas with wind stoppage, breeze and wind flow reversal or the ventilation section is smaller than the design section 2/3, performing gas over-limit yellow early warning; in the gas management of a stoping and driving working face, when the problems of gas, abnormal geological structure, no report, artificial damage of ventilation facilities and the like occur, the gas over-limit yellow early warning is carried out; when the monitoring and monitoring system is found to be out of operation or gas control measures are not executed, performing red early warning of gas overrun in real time;
and fourthly, the gas overrun early warning comprehensive management platform can realize multi-index superposition gas overrun comprehensive grading early warning of two or more single-index early warnings while realizing gas overrun early warning according to the single-index early warning rule. The multi-index superposed gas overrun comprehensive grading early warning means that one working face gas overrun yellow early warning is generated when only one index is triggered, and when two or more yellow early warning indexes are met simultaneously, the two or more yellow early warnings can be upgraded into one gas overrun red early warning. As shown in fig. 3, when the geological structure abnormality and the gas concentration abnormality simultaneously trigger the gas overrun yellow early warning, the two overrun yellow early warnings jointly identify the overrun danger and send out the gas overrun red early warning.
Claims (7)
1. The utility model provides a gas overrun early warning system which characterized in that includes:
the gas overrun early warning comprehensive management platform is used for acquiring gas concentration data of a mine, excavation footage, geological measurement, outburst prevention indexes and gas data of a coal seam of an underground working face, uploading the acquired data to a gas overrun early warning database in a gas overrun early warning comprehensive server, and is also used for setting early warning rules of the mine, issuing early warning results, relieving early warning, performing gas early warning judgment in the gas overrun early warning database according to the early warning rules and issuing judgment results through a gas overrun early warning information issuing system;
the gas overrun early warning integrated server is used for establishing a gas overrun early warning database of a mine; the gas overrun early warning database is used for storing gas overrun early warning data of a mine and is also used for calculating and judging an early warning result;
the gas overrun early warning information release system is connected with the gas overrun early warning comprehensive management platform and used for releasing network information of a mine gas overrun comprehensive early warning result;
the gas overrun early warning comprehensive management platform is connected with a working face excavation progress management system, a working face geological measurement management system, a working face dynamic outburst prevention management system and an underground data input terminal;
the working face excavation progress management system is used for recording the working face mining footage daily report and the tunneling footage daily report, and realizing dynamic management of the mine excavation progress;
the working face geological measurement management system is used for managing a new excavation roadway and a stope working face of a mine, recording a geological structure in real time and realizing dynamic management of the new and old roadways, the working faces and the geological structure of the mine;
the working face dynamic outburst prevention management system is used for recording early warning indexes of gas overrun of each working face of a mine in real time, generating a full mine gas geological map and realizing dynamic management of the full mine gas overrun information from a local part to an area;
the underground data input terminal is used for recording abnormal conditions of coal seam occurrence, geological structure, ventilation, management factors and gas data of underground tunneling and stoping working faces in real time and transmitting the abnormal conditions to the working face early warning management system connected with the gas overrun early warning management sub-platform through an underground looped network.
2. The gas overrun early warning system as claimed in claim 1, wherein the gas overrun early warning integrated management platform is connected with a working face gas emission dynamic characteristic management system, and the working face gas emission dynamic characteristic management system is connected with a monitoring system through monitoring system interface software; the monitoring system is used for reading gas concentration data of a mine in real time and uploading the data to the working face gas emission dynamic characteristic management system through the monitoring system interface software.
3. The gas overrun early warning system as claimed in claim 2, wherein the working face gas emission dynamic characteristic management system is used for displaying, inquiring and dynamically analyzing the data to be calibrated, managing the normally working and calibrated gas sensor, and modeling the implicit information of the data.
4. The gas overrun early warning system as claimed in claim 1, wherein the gas overrun early warning data comprises gas, geology, production, early warning rules and early warning results.
5. A gas overrun early warning method is characterized by comprising the following steps:
acquiring gas concentration data of a mine, and excavating footage, geological measurement, outburst prevention indexes and underground working face coal seam gas data;
uploading the acquired data to a gas overrun early warning database in a gas overrun early warning comprehensive server; the gas overrun early warning integrated server is used for establishing a gas overrun early warning database of a mine; the gas overrun early warning database is used for storing gas overrun early warning data of a mine;
calculating and judging the early warning result according to the corresponding early warning rule in the gas overrun early warning database;
network information publishing is carried out on the mine gas overrun comprehensive early warning result through a gas overrun early warning information publishing system;
the method for acquiring the gas concentration data of the mines, the excavation footage, the geological measurement, the outburst prevention indexes and the gas data of the coal seam of the underground working face comprises the following steps:
reading gas concentration data of a mine in real time;
mine excavation footage, geological survey, outburst prevention indexes and field input of underground working face coal seam gas data;
the method for realizing calculation and judgment of the early warning result according to the corresponding early warning rule in the gas overrun early warning database comprises the following steps:
according to the gas emission quantity change condition of each working face analyzed by the working face gas emission dynamic characteristic management system, and according to a preset gas overrun rule, sending out gas overrun early warning information;
sending out gas overrun early warning information according to the gas overrun index according to the gas pressure, the gas content and the gas geological map in the dynamic outburst prevention system;
according to coal seam occurrence characteristics, geological structures, ventilation and management factors which are input in real time by an underground data input terminal, the relative distances between the front of a working face and coal seam occurrence abnormal areas, geological structure zones and gas abnormal areas are judged by combining tunneling and stoping footage data information of the working face in a mining progress management system, and gas overrun rule judgment is carried out by combining ventilation measure formulation and management factors, so that gas overrun early warning information is sent out.
6. The gas overrun warning method as claimed in claim 5,
according to each working face gas emission quantity change condition of working face gas emission dynamic characteristic management system analysis to according to predetermined gas overrun rule, send out gas overrun early warning information, specifically do: when the gas concentration meets the overrun early warning rule that T1 is more than or equal to 1%, "T2 is more than or equal to 0.7%," T7 maximum value is more than or equal to 1.6%, "or the gas concentration change value is more than or equal to 0.3% under the same process condition in one class, immediately performing the overrun yellow early warning on the gas in the whole mine; when the T1 is more than or equal to 1.2 percent, the T2 is more than or equal to 0.8 percent or the gas concentration change value is more than or equal to 0.4 percent under the same working procedure condition within one class, the red over-limit early warning of the gas in the whole mine is carried out in real time; wherein, T1 is the working face gas sensor value, T2 is the return airway gas sensor value, T7 is the special gas exhaust airway sensor value;
according to gas pressure, gas content and gas geological map among the dynamic outburst prevention system, according to the gas overrun index, send out gas overrun early warning information, specifically do: when the gas pressure and the gas content value reach the over-limit early warning rule of W being more than or equal to 7.5 and less than 8m3Or P is more than or equal to 0.7 and less than 0.74MPa, and performing yellow ultralimit early warning on the gas of the whole mine in real time; when W is more than or equal to 8m3The/t or the P is more than or equal to 0.74MPa, and the red warning of the gas overrun of the whole mine is carried out immediately; wherein W is the gas content and P is the gas pressure;
according to coal seam occurrence characteristics, geological structure, ventilation and management factors input in real time by the underground data input terminal, tunneling and stoping footage data information of a working face in the mining progress management system is combined, the relative distance between the working face and a coal seam occurrence abnormal area, a geological structure area and a gas abnormal area in front is judged, ventilation measures are combined to make and manage the factors, gas overrun rule judgment is carried out, and gas overrun early warning information is sent out, and the method specifically comprises the following steps: when the tunneling and stoping working face is positioned within the range of 20m of a geological structure zone, within the range of 50m of ground drilling or the top plate is broken, performing gas over-limit yellow early warning; when the coal layer of the driving face is disordered, the trend of the coal layer and the dip angle are suddenly changed sharply or the damage type of the coal body is changed from I and II type coal into III type coal, IV type coal and V type coal, the early warning of the overlimit yellow of gas is sent out immediately; when the working face has areas with wind stoppage, breeze and wind flow reversal or the ventilation section is smaller than the design section 2/3, performing gas over-limit yellow early warning; in the gas management of a stoping and driving working face, when the problems of abnormal gas and geological structure and no report or artificial damage of ventilation facilities occur, the yellow over-limit gas early warning is carried out; and when the monitoring and monitoring system is found to be out of operation or gas control measures are not executed, carrying out red early warning of gas overrun in real time.
7. The gas overrun early warning method as claimed in claim 6, further comprising:
the multi-index superposed gas overrun comprehensive grading early warning of two or more single-index early warnings is realized: and when two or more yellow early warning indexes are met simultaneously, two or more yellow early warnings can be upgraded to a gas over-limit red early warning.
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| CN113217083B (en) * | 2021-05-31 | 2022-09-02 | 重庆工程职业技术学院 | Gas treatment system for gas abnormal area of easily spontaneous combustion coal bed |
| CN113586150A (en) * | 2021-06-30 | 2021-11-02 | 华北科技学院(中国煤矿安全技术培训中心) | Coal and gas outburst early warning method |
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| CN114932762B (en) * | 2022-03-03 | 2024-05-07 | 汇源印刷包装科技（天津）股份有限公司 | Safety precaution system of full-automatic ink jet numbering machine |
| CN114885130A (en) * | 2022-05-10 | 2022-08-09 | 中国矿业大学 | Intelligent monitoring and early warning system and method for dust disasters of coal mine excavation face |
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