Coal Mine Underground Positioning System Based on Through-Ground Communication

Abstract

The application discloses a coal mine underground positioning system based on ground penetrating communication, and relates to the technical field of positioning systems, and particularly relates to a ground communication end, a portable mobile terminal, a work information registration module and a work range division module. The ground communication end comprises a plurality of annular antenna units, which are used for receiving a plurality of ground penetrating communication signals. The portable mobile terminal is bound with a staff member, and is used for sending signals to the ground communication end and positioning a current position. The work information registration module acquires portable mobile terminal number information, and acquires work information of the staff member bound therewith through the number information. According to the work information, target staff members are screened out and marked. The work range division module divides the work range of the staff member according to the work site and work route of the marked staff member. The accident checking module sets an accident level according to the number of staff members deviating from the work range after receiving an accident notification. Compared with the prior art, the application can monitor the coordinates of specific groups of people, and can effectively predict the level and range of accidents.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, and more specifically to a coal mine underground positioning system based on through-ground communication. Background Technology

[0002] Mining is a fundamental industry for national economic and social development, but mine accidents can cause significant loss of life and property. There are many reasons for accidents, one of the main reasons being inadequate safety facilities and insufficient investment in safety equipment by enterprises, especially in some small and medium-sized coal mines where basic safety facilities are very rudimentary. When a mine disaster occurs, some survivors are often trapped underground. Because conventional wired communication facilities are also damaged in the mine disaster, communication in the mine and surrounding areas is paralyzed, making it impossible for rescuers to accurately understand the condition and location of the trapped people, which greatly hinders the rescue work. Furthermore, traditional wireless communication, which uses air as a transmission medium, is also difficult to apply directly to mine communication. The reasons are twofold: (1) Radio waves are difficult to penetrate rock and soil layers, and they will experience attenuation in the rock layers that is much greater than that in free space. (2) The space in the tunnel is narrow, and the reflection and scattering of radio waves are severe, resulting in large signal attenuation and difficulty in receiving signals.

[0003] Inductive communication, ultra-low frequency (ULF) ground-penetrating communication, power line carrier communication, and short-range wireless network communication are the main methods of underground wireless communication today. Ground-penetrating communication uses the layered earth as the propagation medium, relying on radio waves to penetrate the earth to transmit information. Due to the stable characteristics of the earth channel, it is less affected by natural disasters and accidents, and has advantages such as good safety performance, good protection performance, and strong anti-interference ability. It is currently the most widely used and reliable underground communication method. Through ground-penetrating communication systems, the command terminal on the surface can obtain the location of miners underground in real time, thereby achieving precise rescue. However, most existing ground-penetrating communication systems are designed for communication and positioning between miners and the surface. When an accident occurs, it is impossible to judge the size and impact of the accident in a timely manner. Therefore, in the process of handling accidents, it is difficult to determine the response level. When the accident is small but the response level is high, it will affect normal production and sales; when the accident is large but the response level is insufficient, it may cause significant casualties. Summary of the Invention

[0004] The purpose of this invention is to provide a coal mine underground positioning system based on through-ground communication, thereby solving the aforementioned technical problems.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A coal mine underground positioning system based on through-ground communication includes:

[0007] Ground communication terminal: includes multiple ring antenna elements for receiving multiple ground-penetrating communication signals;

[0008] Portable mobile terminal: It is bound to the staff and used to send signals to the ground communication terminal to locate the current position;

[0009] Work information registration module: Obtains the portable mobile terminal number information, and obtains the work information of the staff member bound to it through the number information, and filters out the target staff member and marks it based on the work information;

[0010] Work Scope Division Module: Divides the work scope of the marked workers based on their work locations and work routes;

[0011] Accident verification module: Upon receiving an accident notification, the accident level is set based on the number of workers who have deviated from their work area.

[0012] As a further aspect of the present invention, it also includes an accident area prediction module. In the accident area prediction module, the underground area is divided into several working areas, the total number of marked workers in each working area is determined, and the proportion of refuge workers in the working area to the marked workers in that working area is calculated. When the proportion is greater than or equal to 30%, the current working area is determined to be an accident area.

[0013] As a further aspect of the present invention: in the work information registration module, the work information includes the worker's work location, work type, and work route. The work type includes mining, tunneling, ventilation, equipment maintenance, and transportation. The target worker is a worker with a fixed work location or a fixed work route.

[0014] As a further aspect of the present invention, the specific steps in the accident verification module are as follows:

[0015] Acquire the ground-to-ground communication signals of the marked personnel to determine their current location;

[0016] The current location of the staff member is compared with its work area to determine whether the staff member's current location is within its work area.

[0017] If the current location of the worker is within their work area, then the worker is considered a normal employee.

[0018] If the current location of the worker is outside their work area, the worker is determined to be a refugee worker.

[0019] The accident level is determined based on the percentage of evacuees among the marked staff.

[0020] As a further aspect of the present invention: the specific steps for setting the accident level in the accident verification module are as follows:

[0021] If the proportion of evacuated employees among the marked staff is greater than or equal to 30%, the accident is classified as Level 1.

[0022] If the proportion of evacuated employees among the marked staff is greater than or equal to 10% but less than 30%, the accident is classified as Level 2.

[0023] If the proportion of evacuees among the marked staff is greater than or equal to 0 but less than 10%, the accident is classified as Level 3.

[0024] As a further aspect of the present invention: when the accident level is Level 1, all personnel inside the well are evacuated and the accident is investigated; when the accident level is Level 2, all personnel in the suspected area are evacuated and the accident is investigated; when the accident level is Level 3, all personnel in the accident area are evacuated, operations in the suspected area are stopped and the accident is investigated; the suspected area is the work area where employees seeking refuge are located.

[0025] As a further aspect of the present invention: when the accident level is level three and there is no accident area, operations in the suspected area are suspended and the accident is investigated.

[0026] As a further aspect of the present invention: when the accident level is level three and there is more than one accident area, the accident level is raised to level two.

[0027] The beneficial effects of this invention are as follows: This invention uses the location information of specific target workers as a basis. These target workers are those with fixed work locations or fixed work routes. Therefore, once the work location and work route of such workers are obtained, their approximate activity range in daily work can be determined. For these workers with fixed job content and fixed activity range, they will not leave their work range during normal work (except for special circumstances such as commuting to and from work or eating). They will only leave their posts when an accident occurs underground. Therefore, monitoring the coordinates of these specific groups of people can effectively predict the level and scope of accidents. Attached Figure Description

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the accident level determination process in the underground coal mine positioning system based on through-ground communication, as described in this invention. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1 As shown, the present invention is a coal mine underground positioning system based on through-ground communication, comprising:

[0032] Ground communication terminal: includes multiple ring antenna elements for receiving multiple ground-penetrating communication signals;

[0033] Portable mobile terminal: It is bound to the staff and used to send signals to the ground communication terminal to locate the current position;

[0034] Work information registration module: Obtains the portable mobile terminal number information, and obtains the work information of the staff bound to it through the number information. Target staff are filtered and marked according to the work information. The work information includes the staff's work location, work type and work route. The work type includes mining, tunneling, ventilation, equipment maintenance and transportation.

[0035] Work Scope Division Module: Divides the work scope of the marked workers based on their work locations and work routes;

[0036] Accident verification module: Upon receiving an accident notification, the accident level is set based on the number of workers who have deviated from their work area.

[0037] In this invention, the location information of specific target workers is used as the basis. These target workers are those with fixed work locations or fixed work routes. Therefore, once the work location and work route of such workers are obtained, their approximate activity range in daily work can be determined. For example, for workers whose job type is mining, their work range is a certain area radiating from their work location. Similarly, for workers whose job type is transportation, their work range is the roads and mining faces along their work route. However, some jobs with high mobility or freedom, such as equipment maintenance, are not within the scope of target workers in this invention.

[0038] For these workers whose job duties and activity ranges are fixed, they will not leave their work area during normal work (except for special circumstances such as commuting to and from work or eating). They will only leave their posts when an accident occurs underground. Therefore, monitoring the coordinates of these specific groups of people can effectively predict the level and scope of accidents.

[0039] In a preferred embodiment of the present invention, an accident area prediction module is also included. In the accident area prediction module, the underground area is divided into several working areas, the total number of marked workers in each working area is determined, and the proportion of refuge workers in the working area to the marked workers in the working area is calculated. When the proportion is greater than or equal to 30%, the current working area is determined to be an accident area.

[0040] In another preferred embodiment of the present invention, the specific steps in the accident verification module are as follows:

[0041] Acquire the ground-to-ground communication signals of the marked personnel to determine their current location;

[0042] The current location of the staff member is compared with its work area to determine whether the staff member's current location is within its work area.

[0043] If the current location of the worker is within their work area, then the worker is considered a normal employee.

[0044] If the current location of the worker is outside their work area, the worker is determined to be a refugee worker.

[0045] The accident level is determined based on the percentage of evacuees among the marked staff.

[0046] In this embodiment, the specific steps for setting the accident level in the accident verification module are as follows:

[0047] If the proportion of evacuated employees among the marked staff is greater than or equal to 30%, the accident is classified as Level 1.

[0048] If the proportion of evacuated employees among the marked staff is greater than or equal to 10% but less than 30%, the accident is classified as Level 2.

[0049] If the proportion of evacuees among the marked staff is greater than or equal to 0 but less than 10%, the accident is classified as Level 3.

[0050] In a preferred embodiment of the present invention, when the accident level is Level 1, all personnel in the well are evacuated and the accident is investigated; when the accident level is Level 2, all personnel in the suspected area are evacuated and the accident is investigated; when the accident level is Level 3, all personnel in the accident area are evacuated, work in the suspected area is stopped and the accident is investigated; the suspected area is the work area where employees seeking refuge are located.

[0051] In a preferred embodiment of the present invention, when the accident level is level three and there is no accident area, the suspected area is shut down and the accident is investigated.

[0052] In a preferred embodiment of the present invention, when the accident level is level three and there is more than one accident area, the accident level is raised to level two. This embodiment addresses the issue that when accidents occur simultaneously at multiple points, they may cause a chain reaction and pose significant hidden dangers, thus requiring a higher level of accident handling.

[0053] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A coal mine underground positioning system based on ground penetrating communication, characterized in that, The application relates to a ground communication terminal, a portable mobile terminal, a work information registration module, a work range division module and an accident checking module. The ground communication terminal comprises a plurality of annular antenna units for receiving a plurality of through-the-earth communication signals. The portable mobile terminal is bound to a staff member and used for sending signals to the ground communication terminal and positioning a current position. The work information registration module acquires portable mobile terminal number information and work information of the staff member bound to the portable mobile terminal through the number information, filters out target staff members according to the work information and marks the target staff members. The work range division module divides work ranges of the marked staff members according to work sites and work routes of the marked staff members. The accident checking module sets an accident level according to a number of staff members deviating from the work ranges when receiving an accident notification. The accident area prediction module divides an underground area into a plurality of work areas, checks a total number of the marked staff members in each work area, calculates a proportion of refuge staff members in the marked staff members in the work area, and determines that the current work area is an accident area when the proportion is greater than or equal to 30%. In the accident checking module, the specific steps are as follows: Through-the-earth communication signals of the marked staff members are acquired to determine current positions of the staff members. The current positions of the staff members are compared with the work ranges of the staff members to determine whether the current positions of the staff members are located in the work ranges of the staff members. If the current positions of the staff members are located in the work ranges of the staff members, the staff members are determined to be normal staff members. If the current positions of the staff members are located out of the work ranges of the staff members, the staff members are determined to be refuge staff members. An accident level is set according to a proportion of the refuge staff members in the marked staff members. In the accident checking module, the specific setting steps of the accident level are as follows: The proportion of the refuge staff members in the marked staff members is greater than or equal to 30%, and the accident level is determined to be level one. The proportion of the refuge staff members in the marked staff members is greater than or equal to 10% and less than 30%, and the accident level is determined to be level two. The proportion of the refuge staff members in the marked staff members is greater than or equal to 0 and less than 10%, and the accident level is determined to be level three.

2. A through-the-earth communication based underground coal mine positioning system according to claim 1, characterised in that, In the work information registration module, the work information comprises work sites, work types and work routes of the staff members, the work types comprise mining, tunneling, ventilation, equipment maintenance and transportation, and the target staff members are staff members with fixed work sites or fixed work routes.

3. The through-the-earth communication based underground coal mine positioning system according to claim 1, wherein, When the accident level is level one, all the staff members in the well are evacuated, and the accident is checked; when the accident level is level two, all the staff members in a suspicious area are evacuated, and the accident is checked; when the accident level is level three, all the staff members in an accident area are evacuated, and the suspicious area stops operation and the accident is checked; the suspicious area is a work area where the refuge staff members exist.

4. A through-the-earth communication based underground coal mine positioning system according to claim 3, characterised in that, When the accident level is level three and there is no accident area, the suspicious area stops operation and the accident is checked.

5. The through-the-earth communication based underground coal mine positioning system according to claim 3, wherein, When the accident level is level three and there is more than one accident area, the accident level is raised to level two.

Images