A coal mine environment safety monitoring system and method

Abstract

The present application provides a kind of coal mine environment safety monitoring system and method, the system is by setting up environment information acquisition terminal in different monitoring position and using end server to carry out pre-processing, improve the analysis and identification precision of the safety level corresponding to environment information, then selectively select the environment information exceeding the preset safety level limit and transmit to the main server of upper level, reasonably allocate monitoring workload, reduce the processing problem caused by too much data.The main server is used to store, analyze and process the environment information exceeding the preset safety level limit, the safety level matched therewith and the personnel position identity information into three-dimensional space safety information updated according to monitoring cycle.The use of the system and method can effectively monitor the safety problems in coal mine underground, realize accurate and timely automatic informationization prediction and early warning, and provide effective help for handling safety accidents.

Description

Technical Field

[0001] This invention belongs to the field of coal mining and relates to a coal mine environmental safety monitoring system and method. Background Technology

[0002] With coal mine safety issues becoming increasingly prominent, it is becoming increasingly important to monitor the safety status of coal mines, improve the early warning capabilities for major hazard sources, reduce the incidence of major hazard source accidents, and improve the overall safety management level of coal mines.

[0003] The most common method for coal mine safety monitoring is to use sensors to detect environmental information in various underground areas, such as the content of hazardous gases like methane, and then send this data directly to a ground server. The server then records the correspondence between the current time and the hazardous gas content, thus completing the safety monitoring of the coal mine.

[0004] CN104675435A discloses a coal mine safety monitoring system. This system connects to an underground ring network platform via a network switch, which in turn connects to a server. Terminal devices connect to the ring network platform to receive signals transmitted remotely from monitoring substations and send them to the host for processing; it also receives signals from the host and sends them to the corresponding monitoring substations. This mine monitoring system monitors methane concentration, carbon monoxide concentration, wind speed, wind pressure, temperature, smoke, power supply status, air door status, ventilation duct status, local ventilation fan operation, and main ventilation fan operation. It also implements audible and visual alarms for methane exceeding limits, power outages, and methane-powered interlock control. The system is highly automated, accurately detects the content of various gases, and ensures the safety of underground production.

[0005] CN202140117U discloses a system for detecting, identifying, predicting, and providing early warning of major hazard sources in coal mines. The system includes a server, an operator terminal, a ring network switch, fire and gas detectors, a hydrological monitor, and a roof pressure monitor. The fire and gas detectors, hydrological monitors, and roof pressure monitors installed underground are connected to the ring network switch, which in turn connects to the server and operator terminal located above ground via a network. The system utilizes a decision support module in the software platform to achieve real-time centralized monitoring of water, fire, gas, and roof pressure. It can provide early warnings and predictions of hazardous conditions, offering the most effective assistance in handling accidents and disasters.

[0006] However, due to the complexity of the coal mine environment and operating conditions, and the large amount of environmental information that needs to be monitored, the monitoring system often results in an excessive amount of data received by the ground server, leading to a rapid increase in workload and delays in data processing, thus failing to accurately reflect the current safety status of the coal mine.

[0007] More specifically: existing monitoring systems have not yet established multi-disciplinary, multi-professional integrated models for the detection, identification, and early warning of major hazard sources. They lack comprehensive data mining of the massive amounts of data acquired by detection and monitoring equipment, relying instead on simple analyses based on single disciplines. There is no unified information data processing platform or network platform, resulting in limited consideration of factors in the analysis and research of related accidents. This leads to difficulties in information sharing and exchange, complex system operation, and low accuracy in forecasting. Furthermore, coal enterprises' technical management models are still primarily based on traditional manual management methods, which cannot adapt to the needs of information management and cannot fully leverage the advantages of information technology in terms of speed, accuracy, and real-time performance. Coal mine information falls under the category of spatial information, and different mines have varying mining technology conditions. A large amount of data is acquired through numerous monitoring and control systems, and general industrial control configuration software is not tailored to the coal industry, failing to meet the needs of processing spatial information in coal mines.

[0008] Therefore, a new technical solution for monitoring environmental safety in coal mines is needed to address the above issues. Summary of the Invention

[0009] In view of the problems existing in the prior art, the purpose of this invention is to provide a coal mine environmental safety monitoring system and method. The system improves the accuracy of analysis and identification of the safety levels corresponding to environmental information by setting up environmental information acquisition terminals at different monitoring locations and using an end server for preprocessing. It then selectively selects environmental information exceeding preset safety level limits and transmits it to the upper-level main server, rationally allocating the monitoring workload and reducing processing problems caused by excessive data volume. Simultaneously, the main server stores, analyzes, and processes environmental information exceeding preset safety level limits, along with their matching safety levels and personnel location and identity information, into three-dimensional spatial safety information updated according to the monitoring cycle. Using this system and method, efficient monitoring of underground coal mine safety issues can be achieved, enabling accurate and timely automatic information-based prediction and early warning, providing effective assistance in handling safety accidents.

[0010] To achieve this objective, the present invention adopts the following technical solution:

[0011] In a first aspect, the present invention provides a coal mine environmental safety monitoring system, including environmental information acquisition terminals installed in different areas underground, each group of environmental information acquisition terminals being connected to a corresponding end server; the end server is also connected to a safety level output terminal and is connected to an upper-level main server through a network switch, the network switch being connected to a monitoring host;

[0012] The end server includes an environmental information acquisition module, a personnel location acquisition module, a personnel identity acquisition module, an analysis module, and a control module. The end server is configured to control the environmental information acquisition terminal to collect and analyze environmental information, calculate and match security levels based on the environmental information, output the security level results to the security level output terminal, and output environmental information that exceeds the preset security level limit, along with the corresponding security level, personnel location information, and personnel identity information, to the main server.

[0013] The main server includes a storage module, a GIS module, and a management and control module; the main server is configured to store environmental information exceeding the preset security level limit, as well as the corresponding security level, personnel location information, and personnel identity information, and analyze and generate three-dimensional spatial security information updated according to the monitoring cycle.

[0014] The system described in this invention refers to a system composed of equipment and devices. In the coal mine environmental safety monitoring system, by setting up an end server, environmental information is first processed. Based on the processing results, i.e., the relationship between the obtained safety level and the preset safety level limit, environmental information exceeding the preset safety level limit, along with the corresponding safety level, personnel location information, and personnel identity information, is selectively transmitted to the main server. Therefore, the end server can share the workload in analyzing and identifying environmental information and calculating matching safety levels, improving the accuracy of safety level determination and reducing the total amount and size of uploaded data. Furthermore, the main server generates three-dimensional spatial safety information based on the uploaded and stored data and in conjunction with a Geographic Information System (GIS), effectively realizing safety level feedback and monitoring. Using the described system and method, efficient monitoring of underground coal mine safety issues can be effectively achieved, enabling accurate and timely automatic information-based prediction and early warning, providing effective assistance in handling safety accidents.

[0015] The following are preferred technical solutions of the present invention, but are not intended to limit the technical solutions provided by the present invention. The technical objectives and beneficial effects of the present invention can be better achieved and realized through the following technical solutions.

[0016] As a preferred technical solution of the present invention, the installation location of the environmental information acquisition terminal includes the tunneling face, the coal mining face, the intake airway, and the return airway.

[0017] Preferably, the installation position in the tunneling face includes any one or a combination of at least two of the following: the return air side of the tunneling machine, the return air side of various working points, and the breathing zone between the dust-generating point and the dust collector. Typical but non-limiting examples of the combination include the combination of the return air side of the tunneling machine and the return air side of various working points, the combination of the return air side of the tunneling machine and the breathing zone between the dust-generating point and the dust collector, or the combination of the return air side of various working points and the breathing zone between the dust-generating point and the dust collector.

[0018] Preferably, the installation position of the coal mining face includes any one or a combination of at least two of the following: the return air side of the coal mining machine, the driver's working point, or the upper corner of the coal mining face. Typical but non-limiting examples of such combinations include the combination of the return air side of the coal mining machine and the driver's working point, the combination of the upper corner of the coal mining face and the return air side of the coal mining machine, or the combination of the return air side of the coal mining machine and the driver's working point.

[0019] Preferably, each group of environmental information acquisition terminals includes any one or a combination of at least two of the following: a gas sensor, an oxygen sensor, a dust sensor, a pressure sensor, or a temperature sensor. Typical but non-limiting examples of such combinations include combinations of gas and oxygen sensors, gas and dust sensors, gas and pressure sensors, gas and temperature sensors, oxygen and dust sensors, oxygen and pressure sensors, oxygen and temperature sensors, dust and pressure sensors, dust and temperature sensors, or temperature and pressure sensors.

[0020] Preferably, the security level output terminal includes an audible and visual alarm or a multi-color alarm.

[0021] When the end server outputs the security level result to the security level output terminal, different audible and / or visual alarm methods can be matched according to the security level classification. For example, when the security level result is less than the preset security level limit, the alarm light is green, representing "no risk, safe" or "low risk, safe"; when the security level result is equal to the preset security level limit, the alarm light can be set to yellow, representing "low risk, investigation recommended"; when the security level result is greater than the preset security level limit, the alarm light can be set to orange or red, representing "medium risk, investigation required" and "high risk, evacuation required," respectively. Those skilled in the art can select the alarm method that matches the security level according to actual needs.

[0022] Secondly, the present invention provides a method for monitoring environmental safety in coal mines, wherein the method is performed in the system described in the first aspect and includes the following steps:

[0023] Within a monitoring cycle, the end server first collects environmental information within a first time period and matches it to the first security level:

[0024] When the first security level = 0, output the security level result and enter the next monitoring cycle;

[0025] When the first security level is not equal to 0, new environmental information is collected in the second time range and / or in the third time range, where the first time range > the second time range > the third time range, and the corresponding new security level is matched respectively. Then, the correction level is increased according to the numerical relationship between the security level in the current time range and the security level in the previous time range.

[0026] The sum of all security levels and all correction levels is the total security level for the current monitoring period. The total security level result is output. At the same time, the corresponding environmental information, personnel location information, and personnel identity information that exceed the preset security level limit are output to the main server, and the next monitoring period begins.

[0027] The method described above utilizes an end server to monitor environmental information in stages within a monitoring cycle. A security level of 0 represents "no risk, safe," while a security level not equal to 0 indicates varying degrees of risk. Therefore, when the first security level within the first time period is not equal to 0, monitoring needs to be conducted within a second and / or third time period within the cycle, with the monitoring duration decreasing progressively to facilitate rapid verification of the monitoring results from the previous period. This avoids excessively extending the total monitoring time, allowing for multiple verifications of medium-risk results, reducing errors, data generation, and upload efficiency. Simultaneously, it enables rapid response to high-risk results, providing timely output or alarms.

[0028] As a preferred technical solution of the present invention, environmental information is collected at a first frequency, a second frequency, and a third frequency in the first time range, the second time range, and the third time range, respectively, and the first frequency < the second frequency < the third frequency.

[0029] In addition to the different duration range within a cycle, the monitoring frequency of the sensor can be further controlled within each duration, i.e., the number of monitoring times within that duration. In a longer duration range, the monitoring frequency can be reasonably reduced, especially when there is no tunneling or mining operation, which can effectively reduce the amount of data generated and reduce the working pressure on the sensor. However, as the duration range decreases, the monitoring frequency should be reasonably increased to ensure the accuracy of the monitoring results in a shorter duration range.

[0030] Preferably, the first duration range is 40 to 60 seconds, such as 40 seconds, 42 seconds, 44 seconds, 46 seconds, 48 ​​seconds, 50 seconds, 52 seconds, 54 seconds, 56 seconds, 58 seconds, or 60 seconds; the second duration range is 6 to 10 seconds, such as 6 seconds, 6.5 seconds, 7 seconds, 7.5 seconds, 8 seconds, 8.5 seconds, 9 seconds, 9.5 seconds, or 10 seconds; and the third duration range is 2 to 5 seconds, such as 2 seconds, 2.5 seconds, 3 seconds, 3.5 seconds, 4 seconds, 4.5 seconds, or 5 seconds. However, it is not limited to the listed values, and other unlisted values ​​within the above ranges are also applicable.

[0031] Preferably, the first frequency is 8 to 10 seconds per cycle, such as 8 seconds, 8.2 seconds, 8.4 seconds, 8.6 seconds, 8.8 seconds, 9 seconds, 9.2 seconds, 9.4 seconds, 9.6 seconds, 9.8 seconds, or 10 seconds per cycle; the second frequency is 2 to 3 seconds per cycle, such as 2 seconds, 2.2 seconds, 2.4 seconds, 2.6 seconds, 2.8 seconds, or 3 seconds per cycle; and the third frequency is 1 second per cycle or real-time monitoring, but is not limited to the listed values. Other unlisted values ​​within the above range are also applicable.

[0032] As a preferred technical solution of the present invention, the method for matching security levels includes matching security levels based on the relationship between the average value of environmental information in the current time period and a first threshold and a second threshold.

[0033] Preferably, the security level is 0 when the average value of the environmental information is less than a first threshold; the security level is 1 when the first threshold is less than or equal to the average value of the environmental information and less than a second threshold; and the security level is 2 when the average value of the environmental information is greater than or equal to the second threshold.

[0034] As a preferred technical solution of the present invention, when the first security level = 1, new environmental information is collected sequentially within the second time range and the third time range, and the corresponding security levels are matched as the second security level and the third security level, respectively. A first correction level is added according to the numerical relationship between the second security level and the first security level, and a second correction level is added according to the numerical relationship between the third security level and the second security level.

[0035] The sum of the first security level, the second security level, the third security level, the first correction level, and the second correction level is the total security level.

[0036] When the first safety level is 1, the safety risk is not the highest. At this time, the reliability of the monitoring results in the first period is low due to factors such as changes in the working environment and measurement errors. Therefore, it is necessary to repeat the monitoring in the second period and monitor again in the third period to verify the safety level results. The correction level is provided based on the changing trend of the monitoring results in the three periods to enhance the accuracy of the final overall safety level. After repeated monitoring, errors and fluctuations can be effectively filtered out, resulting in a more accurate, stable and detailed overall safety level.

[0037] Preferably, when the second security level - the first security level = -1, the first correction level = -1; when the second security level - the first security level = 0, the first correction level = 1; when the second security level - the first security level = 1, the first correction level = 2.

[0038] Preferably, when the third security level - the second security level = -2, the second correction level = -1; when the third security level - the second security level = -1, the second correction level = 0; when the third security level - the second security level = 0, the second correction level = 1; when the third security level - the second security level = 1, the second correction level = 2; when the third security level - the second security level = 2, the second correction level = 3.

[0039] As a preferred technical solution of the present invention, when the first security level = 2, new environmental information is directly collected within the third time range, the corresponding security level is matched as the fourth security level, and a third correction level is added according to the numerical relationship between the fourth security level and the first security level; the sum of the first security level, the fourth security level and the third correction level is the total security level.

[0040] When the first safety level is 2, the safety risk reaches its highest level. To avoid delays in alarm information, monitoring is carried out directly within the third time range, which has the shortest duration. A fourth correction level is added based on the monitoring results and the changing trend of the first safety level to reduce the impact of errors and fluctuations and to quickly identify high-risk situations.

[0041] Preferably, when the fourth security level - the first security level = -2, the third correction level = 0; when the fourth security level - the first security level = 1, the third correction level = 2; when the fourth security level - the first security level = 0, the third correction level = 4.

[0042] As a preferred technical solution of the present invention, the coal mine environmental safety monitoring method further includes:

[0043] The main server receives and stores environmental information that exceeds the preset security level limit, along with the corresponding security level, personnel location information, and personnel identity information. It then analyzes and generates three-dimensional spatial security information containing the security level, personnel location information, and personnel identity information through the GIS module, and updates the three-dimensional spatial security information in the next monitoring cycle.

[0044] Preferably, the preset security level limit is the median of the numerical range of the security level.

[0045] As a preferred technical solution of the present invention, the duration of the monitoring cycle varies in different work processes.

[0046] Preferably, the monitoring period has the shortest time range when tunneling and mining are carried out simultaneously, and the monitoring period has the longest time range when neither tunneling nor mining is being carried out.

[0047] As a preferred technical solution of the present invention, the coal mine environmental safety monitoring method further includes, in the same operation process, analyzing environmental information exceeding the preset safety level limit according to the monitoring cycle, and adjusting the first threshold, the second threshold and the preset safety level limit according to the monitoring needs and objectives.

[0048] Compared with existing technical solutions, the present invention has at least the following beneficial effects:

[0049] The system described in this invention sets up environmental information collection terminals at different monitoring locations. First, it uses an end server for preprocessing. Based on the processing results—the relationship between the obtained safety level and a preset safety level limit—it selectively transmits environmental information exceeding the preset safety level limit, along with the corresponding safety level, personnel location information, and personnel identity information, to the main server. This reduces workload in analyzing and identifying environmental information and calculating matching safety levels, improving the accuracy of safety level determination and reducing the total amount and size of uploaded data. Furthermore, the main server analyzes and generates three-dimensional spatial safety information based on the uploaded and stored data, effectively achieving safety level feedback and monitoring. Using this system and method, efficient monitoring of underground coal mine safety issues can be achieved, enabling accurate and timely automatic information-based prediction and early warning, providing effective assistance in handling safety accidents. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the coal mine environmental safety monitoring system provided by the present invention. Detailed Implementation

[0051] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0052] The following examples and comparative examples were all conducted within a coal mine environmental safety monitoring system, such as... Figure 1 As shown, the coal mine environmental safety monitoring system includes environmental information acquisition terminals installed in different areas underground, and each set of environmental information acquisition terminals is connected to a corresponding end server; the end server is also connected to a safety level output terminal and is connected to the upper-level main server through a network switch, and the network switch is also connected to a monitoring host;

[0053] The end server includes an environmental information acquisition module, a personnel location acquisition module, a personnel identity acquisition module, an analysis module, and a control module. The end server is configured to control the environmental information acquisition terminal to collect and analyze environmental information, calculate and match security levels based on the environmental information, output the security level results to the security level output terminal, and output environmental information that exceeds the preset security level limit, along with the corresponding security level, personnel location information, and personnel identity information, to the main server.

[0054] The main server includes a storage module, a GIS module, and a management and control module; the main server is configured to store environmental information exceeding the preset security level limit, as well as the corresponding security level, personnel location information, and personnel identity information, and analyze and generate three-dimensional spatial security information updated according to the monitoring cycle;

[0055] The environmental information collection terminals are installed at the following locations: the return air side of the tunneling machine in the tunneling face, the return air side of the coal mining machine in the coal mining face, the upper corner of the coal mining face, the intake roadway, and the return air roadway.

[0056] Each set of environmental information acquisition terminals includes a gas sensor, an oxygen sensor, and a dust sensor;

[0057] The security level output terminal is a four-color alarm, which has green, yellow, orange and red light alarm functions respectively.

[0058] Example 1

[0059] This embodiment provides a method for monitoring environmental safety in coal mines, which is performed within a coal mine environmental safety monitoring system. The method includes the following steps:

[0060] S1. Configure via monitoring host:

[0061] The first duration range is set to 40 seconds, the second duration range to 8 seconds, and the third duration range to 3 seconds. The first frequency is 10 seconds / time, the second frequency is 2 seconds / time, and the third frequency is real-time monitoring.

[0062] Set initial first threshold, second threshold, and preset safety level limit for each of the environmental information (including gas signal, oxygen signal, and dust signal), wherein the preset safety level limit is the median value of the numerical range of the safety level;

[0063] The security level is set to 0 when the average value of the environmental information is less than a first threshold; the security level is set to 1 when the first threshold is less than or equal to a second threshold; and the security level is set to 2 when the average value of the environmental information is greater than or equal to the second threshold.

[0064] The above settings are then transmitted to the main server and each end server via a network switch;

[0065] S2. Then the system runs. Within a monitoring cycle, the end server first collects environmental information at a first frequency within a first time range and matches it to the first security level:

[0066] When the first security level = 0, the security level result is output to the four-color alarm display, the security level result is output to the main server, and text information is displayed on the monitoring host before entering the next monitoring cycle;

[0067] When the first security level = 1, environmental information is collected sequentially at a second frequency within a second time period and matched with the second security level. A first correction level is added based on the numerical relationship between the second and first security levels: when the second security level - the first security level = -1, the first correction level = -1; when the second security level - the first security level = 0, the first correction level = 1; when the second security level - the first security level = 1, the first correction level = 2. Then, environmental information is collected at a third frequency within a third time period and matched with the third security level. A second correction level is added based on the numerical relationship between the third and second security levels: when the third security level - the second security level = -2, the... The second correction level is -1; when the third security level - the second security level = -1, the second correction level = 0; when the third security level - the second security level = 0, the second correction level = 1; when the third security level - the second security level = 1, the second correction level = 2; when the third security level - the second security level = 2, the second correction level = 3; the sum of the first security level, the second security level, the third security level, the first correction level, and the second correction level is the total security level; the security level result is output to the four-color alarm to display a green alarm, the security level result is output to the main server, and text information is displayed on the monitoring host, and the next monitoring cycle begins;

[0068] When the first security level = 2, environmental information is directly collected at the third frequency within the third time range and matched with the fourth security level. A third correction level is added based on the numerical relationship between the fourth and first security levels: when the fourth security level - the first security level = -2, the third correction level = 0; when the fourth security level - the first security level = 1, the third correction level = 2; when the fourth security level - the first security level = 0, the third correction level = 4. The sum of the first security level, the fourth security level, and the third correction level is the total security level. The security level result is output to the four-color alarm display (green alarm), output to the main server, and text information is displayed on the monitoring host before entering the next monitoring cycle.

[0069] S3. While step S2 is being performed, the end server prepares environmental information exceeding the preset security level limit within the monitoring period, obtains personnel location information and personnel identification information, and then outputs the above information to the main server. The main server stores the above information, analyzes it through the GIS module, and generates three-dimensional spatial security information with security level, personnel location information, and personnel identification information, and updates the three-dimensional spatial security information in the next monitoring period.

[0070] During the above process, after the security level results are output to the security level output terminal and the main service, the alarm method is as follows: The initial preset security level limit value is 4; when the security level is 0-2, the four-color alarm displays a green alarm, and the monitoring host displays "No risk, safe"; when the security level is 3-4, the four-color alarm displays a yellow alarm, and the monitoring host displays "Low risk, investigation recommended"; when the security level is 5-6, the four-color alarm displays an orange alarm, and the monitoring host displays "Medium risk, investigate immediately"; when the security level is 7-8, the four-color alarm displays a red alarm, and the monitoring host displays "High risk, evacuate immediately".

[0071] Comparative Example 1

[0072] This comparative example provides a method for monitoring environmental safety in coal mines, implemented within a coal mine environmental safety monitoring system. This method does not perform step-by-step monitoring within a monitoring cycle, nor does it add correction levels. Instead, it continuously collects environmental information in real-time within a monitoring cycle via an end server. A safety level is matched based on the average value of the environmental information within that monitoring cycle: when the average value of the environmental information is less than a first threshold, the safety level is 0; when the first threshold is less than or equal to a second threshold, the safety level is 1; and when the average value of the environmental information is greater than or equal to the second threshold, the safety level is 2. The safety level and all environmental information within that monitoring cycle are transmitted to the main server for storage and analysis.

[0073] Compared to Comparative Example 1, the method provided in Example 1 utilizes an end server to collect environmental information in multiple stages and under various conditions within a single cycle. It analyzes and matches the safety levels and correction levels, resulting in a more refined classification of safety levels. Simultaneously, it improves the reliability and accuracy of safety levels caused by errors and fluctuations in environmental information collection. Furthermore, by selectively transmitting environmental information exceeding preset safety level limits to the upper-level main server, it rationally allocates the monitoring workload and reduces processing problems caused by excessive data volume. Simultaneously, the main server stores, analyzes, and processes environmental information exceeding preset safety level limits, along with their matching safety levels and personnel location and identity information, into three-dimensional spatial safety information updated according to the monitoring cycle. Using the described system and method, efficient monitoring of underground coal mine safety issues can be achieved, enabling accurate and timely automatic information-based prediction and early warning, providing effective assistance in handling safety accidents.

[0074] The present invention has been illustrated with the above embodiments to illustrate its detailed structural features. However, the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions for the components used in the present invention, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0075] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0076] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0077] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A method for monitoring environmental safety in coal mines, characterized in that, The coal mine environmental safety detection method is carried out in the following coal mine environmental safety monitoring system, which includes environmental information acquisition terminals installed in different areas underground. Each set of environmental information acquisition terminals is connected to a corresponding end server. The end server is also connected to a safety level output terminal and is connected to the upper-level main server through a network switch. The network switch is also connected to a monitoring host. The end server includes an environmental information acquisition module, a personnel location acquisition module, a personnel identity acquisition module, an analysis module, and a control module. The end server is configured to control the environmental information acquisition terminal to collect and analyze environmental information, calculate and match security levels based on the environmental information, output the security level results to the security level output terminal, and output environmental information that exceeds the preset security level limit, along with the corresponding security level, personnel location information, and personnel identity information, to the main server. The main server includes a storage module, a GIS module, and a management and control module; the main server is configured to store environmental information exceeding the preset security level limit, as well as the corresponding security level, personnel location information, and personnel identity information, and analyze and generate three-dimensional spatial security information updated according to the monitoring cycle; The coal mine environmental safety monitoring method includes the following steps: Within a monitoring cycle, the end server first collects environmental information within a first time period and matches it to the first security level: When the first security level = 0, output the security level result and enter the next monitoring cycle; When the first security level is not equal to 0, new environmental information is collected in the second time range and / or in the third time range, where the first time range > the second time range > the third time range, and the corresponding new security level is matched respectively. Then, the correction level is increased according to the numerical relationship between the security level in the current time range and the security level in the previous time range. The sum of all security levels and all correction levels is the total security level for the current monitoring period. The total security level result is output. At the same time, the corresponding environmental information, personnel location information and personnel identity information that exceed the preset security level limit are output to the main server, and the next monitoring period begins. The method for matching security levels includes matching security levels based on the relationship between the average value of environmental information within the current time period and a first threshold and a second threshold. The security level is 0 when the average value of the environmental information is less than the first threshold; the security level is 1 when the first threshold is less than or equal to the average value of the environmental information and less than the second threshold; and the security level is 2 when the average value of the environmental information is greater than or equal to the second threshold. When the first security level = 1, new environmental information is collected sequentially within the second time range and the third time range, and the corresponding security levels are matched as the second security level and the third security level, respectively. The first correction level is increased according to the numerical relationship between the second security level and the first security level, and the second correction level is increased according to the numerical relationship between the third security level and the second security level. The sum of the first security level, the second security level, the third security level, the first correction level, and the second correction level is the total security level; When the second security level minus the first security level equals -1, the first correction level equals -1; when the second security level minus the first security level equals 0, the first correction level equals 1; when the second security level minus the first security level equals 1, the first correction level equals 2. When the third security level minus the second security level equals -2, the second correction level equals -1; When the third security level minus the second security level equals -1, the second correction level equals 0; when the third security level minus the second security level equals 0, the second correction level equals 1. When the third security level minus the second security level equals 1, the second correction level equals 2; When the third security level minus the second security level equals 2, the second correction level equals 3; When the first security level = 2, new environmental information is directly collected within the third time period, and the corresponding security level is matched as the fourth security level. A third correction level is added based on the numerical relationship between the fourth security level and the first security level. The sum of the first security level, the fourth security level, and the third correction level is the total security level. When the fourth security level minus the first security level is -2, the third correction level is 0; when the fourth security level minus the first security level is 1, the third correction level is 2; when the fourth security level minus the first security level is 0, the third correction level is 4.

2. The coal mine environmental safety monitoring method according to claim 1, characterized in that, The installation locations of the environmental information collection terminals include tunneling faces, coal mining faces, intake airways, and return airways.

3. The coal mine environmental safety monitoring method according to claim 2, characterized in that, The installation location in the tunneling face includes any one or a combination of at least two of the following: the return air side of the tunneling machine, the return air side of various working points, and the breathing zone between the dust-generating point and the dust collector.

4. The coal mine environmental safety monitoring method according to claim 2, characterized in that, The installation location of the coal mining face includes any one or a combination of at least two of the following: the return air side of the coal mining machine, the driver's working point, or the upper corner of the coal mining face.

5. The coal mine environmental safety monitoring method according to claim 1, characterized in that, Each set of environmental information acquisition terminals includes any one or a combination of at least two of the following: gas sensor, oxygen sensor, dust sensor, pressure sensor, or temperature sensor.

6. The coal mine environmental safety monitoring method according to claim 1, characterized in that, The security level output terminal includes an audible and visual alarm or a multi-color alarm.

7. The coal mine environmental safety monitoring method according to claim 1, characterized in that, Environmental information is collected at a first frequency, a second frequency, and a third frequency within the first time range, the second time range, and the third time range, respectively, and the first frequency < the second frequency < the third frequency.

8. The coal mine environmental safety monitoring method according to claim 7, characterized in that, The first duration range is 40~60s, the second duration range is 6~10s, and the third duration range is 2~5s.

9. The coal mine environmental safety monitoring method according to claim 7, characterized in that, The first frequency is 8~10s / time, the second frequency is 2~3s / time, and the third frequency is 1s / time or real-time monitoring.

10. The coal mine environmental safety monitoring method according to claim 1, characterized in that, The coal mine environmental safety monitoring method also includes: The main server receives and stores environmental information that exceeds the preset security level limit, along with the corresponding security level, personnel location information, and personnel identity information. It then analyzes and generates three-dimensional spatial security information containing the security level, personnel location information, and personnel identity information through the GIS module, and updates the three-dimensional spatial security information in the next monitoring cycle.

11. The coal mine environmental safety monitoring method according to claim 10, characterized in that, The preset security level limit is the median value of the numerical range of the security level.

12. The coal mine environmental safety monitoring method according to claim 10, characterized in that, The duration of the monitoring cycle varies in different operational processes.

13. The coal mine environmental safety monitoring method according to claim 12, characterized in that, The monitoring period has the shortest time range when tunneling and mining are carried out simultaneously, and the monitoring period has the longest time range when neither tunneling nor mining is being carried out.

14. The coal mine environmental safety monitoring method according to claim 12, characterized in that, The coal mine environmental safety monitoring method also includes, in the same operation process, analyzing environmental information that exceeds the preset safety level limit in units of monitoring cycle, and adjusting the first threshold, the second threshold and the preset safety level limit according to monitoring needs and objectives.

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