Distributed detection device and method for coal-rock interface of fully mechanized coal mining face
By designing a distributed detection device for coal-rock interfaces including a centralized control terminal, a data interaction processing relay module and a coal-rock interface recognition sensor, the problem of difficulty in coal-rock interface recognition in coal mining is solved, rapid, safe and intelligent identification is achieved, and coal mining efficiency and coal quality are improved.
Patent Information
- Application Number
- CN202311718872.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-14
- Publication Date
- 2025-06-17
AI Technical Summary
During the coal mining process, it is difficult for the existing technology to achieve rapid, safe and intelligent identification of the coal-rock interface of the comprehensive mining working face, resulting in problems such as waste of resources, reduced coal quality and wear of equipment.
A distributed detection device for coal-rock interfaces in a comprehensive mining working face is designed, including a centralized control terminal, a data interaction processing relay module and a coal-rock interface recognition sensor. The sensor retracts when the coal machine is mined through a telescopic bracket, stretches and collects coal rock interface data after cutting. The data is transmitted to the centralized control terminal through the relay module for processing and identification.
It realizes rapid, safe and intelligent identification of the coal-rock interface of the comprehensive mining working face, improves coal mining efficiency, reduces resource waste and equipment wear, and ensures coal quality and safe production.
Smart Images
Figure CN120159525A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of coal-rock interface recognition, and more specifically, to a distributed detection device and method for coal-rock interfaces in fully mechanized coal mining faces. Background Art
[0002] The stable and healthy development of the coal industry is closely related to China's sustainable development strategy. The problem of intelligent detection and recognition of coal and rock in mines is a major problem restricting the intelligent mining of coal. Under-cutting / over-cutting during the cutting of coal seams by shearers can lead to problems such as waste of resources, reduced extraction rate, mixing of rocks, reduced coal quality, gear wear caused by cutting into rocks, and explosion caused by sparks in high-gas areas. It is very difficult to cope with sudden working conditions by relying on manual observation and experience to adjust the drum height. An efficient intelligent detection and recognition technology for coal and rock is the core technology that needs to be solved for intelligent coal-rock cutting. However, the underground environment is complex, and it is very difficult for existing technical means to achieve ideal results in the narrow and crowded underground space. Therefore, how to achieve rapid, safe and intelligent recognition of coal-rock interfaces in fully mechanized coal mining faces is an urgent problem to be solved by those skilled in the art. Summary of the Invention
[0003] The technical problem solved by the present invention is to provide a distributed detection device and method for coal-rock interfaces in fully mechanized coal mining faces, with the aim of achieving rapid, safe and intelligent recognition of coal-rock interfaces in fully mechanized coal mining faces.
[0004] The present invention provides a distributed detection device for coal-rock interfaces in fully mechanized coal mining faces. The device mainly includes: a centralized control terminal A placed near the fully mechanized coal mining face, relay modules B1, B2,..., B installed on the outer side of the rear shield beam of the hydraulic support k , and coal-rock interface recognition sensors C1, C2,..., C installed on the front beam of the hydraulic support n (n > k, and n is a multiple of k).
[0005] Further, the centralized control terminal A is connected to the data interaction and processing relay modules B1, B2,..., B k through a wireless network or Ethernet. The data interaction and processing relay modules B1, B2,..., B k are connected to the coal-rock interface recognition sensors C1, C2,..., C n through a wireless network. Among them, the coal-rock interface recognition sensors C1, C2,..., C n are distributedly installed on the front beam of the hydraulic support for collecting coal-rock interface data. The data interaction and processing relay modules B1, B2,..., B k are installed on the outer side of the rear shield beam for collecting the data of the corresponding coal-rock interface recognition sensors and sending them to the centralized control terminal A placed near the fully mechanized coal mining face.
[0006] Further, the coal-rock interface recognition sensors C1, C2,..., Cn respectively include a detection sensor and a telescopic support. According to the mining state of the coal shearer, the coal-rock interface recognition sensors C1, C2, …, C n are divided into two states. During the coal mining process of the coal shearer, the coal-rock interface recognition sensors C1, C2, …, C n are in the closed state, the telescopic support inside them retracts to the front beam floor, and the detection sensor is in the standby state; after the coal shearer completes the mining of the current cutting face and moves to the next cutting face, the centralized control terminal A sends a work start instruction, which is relayed through the data interaction processing relay modules B1, B2, …, B k to the coal-rock interface recognition sensors C1, C2, …, C n . After receiving the instruction, the telescopic support inside them extends to the coal-rock detection surface, and the detection sensor starts to work.
[0007] A distributed detection method for the coal-rock interface in a fully mechanized coal mining face. This method mainly includes: The method for recognizing the coal-rock interface by networking distributed sensors in the fully mechanized coal mining face includes: The centralized control terminal A sends the start instruction and acquisition parameter information such as time window, sampling points, and stacking times through the relay modules B1, B2, …, B k to the coal-rock interface recognition sensors C1, C2, …, C n . After the coal-rock interface recognition sensors C1, C2, …, C n receive the instruction and acquisition parameter information, the built-in telescopic support extends to the coal-rock detection surface and starts to collect coal-rock interface data. Subsequently, the collected data is sent to the centralized control terminal A through the interaction processing relay modules B1, B2, …, B k . The centralized control terminal A processes, analyzes, and extracts the collected data to obtain the actual position of the coal-rock interface, and integrates the actual positions of the coal-rock interfaces of multiple coal-rock interface recognition sensors to generate the coal-rock interface contour line at the position of the current hydraulic support.
[0008] Furthermore, the calculation method for the centralized control terminal A to generate the coal-rock interface contour line at the position of the current hydraulic support after data processing and recognition is: Set the position at half of the cycle of the direct wave as the starting zero point of the detection distance, denoted as t0, and perform the following steps on the collected data: ① Zero line setting; ② Background denoising; ③ One-dimensional filtering; ④ Gain. The suspended height d1 of the air-coupled antenna can be calculated according to the formula d1 = v0(t1 - t0) / 2, and the coal seam thickness d2 can be calculated according to the formula It is calculated that the actual position D of the coal-rock interface of a single coal-rock identification sensor can be calculated according to the formula D = d1 + d2. By simultaneously calculating the actual positions of the coal-rock interfaces of multiple coal-rock interface sensors, the contour line of the coal-rock interface at the position where the current hydraulic support is located can be obtained. Here, v0 is the propagation speed of electromagnetic waves in a vacuum, t1 is the time when the antenna receives the reflected wave from the "air-coal" interface, t2 is the time when the antenna receives the reflected wave from the "coal-rock" interface, and ε is the relative permittivity of the coal seam.
[0009] Further, after the current cutting face is mined, the centralized control terminal A sends the end command to the coal-rock interface identification sensors C1, C2,..., C through the relay modules B1, B2,..., B k After receiving the command, the supports retract and stop working, and the hydraulic supports move forward. This process is repeated for the next cutting face. n After receiving the command, the coal-rock interface identification sensors C1, C2,..., C n After receiving the command, the supports retract and stop working, and the hydraulic supports move forward. This process is repeated for the next cutting face. Description of the Drawings
[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0011] Figure 1 It is a schematic layout diagram of the device.
[0012] Among them, A is the centralized control terminal, B1, B2,..., B k are relay modules, C1, C2,..., C n are coal-rock interface identification sensors, 1 is a detection sensor, and 2 is a telescopic support. Detailed Embodiments
[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0014] The object of the present invention is a distributed detection device and method for the coal-rock interface in a fully mechanized coal mining face, which is used to realize the rapid, safe and intelligent identification of the coal-rock interface in the fully mechanized coal mining face.
[0015] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will further describe the present invention in detail with reference to the drawings and specific embodiments.
[0016] Please refer to Figure 1 , Figure 1 The figure is a schematic diagram of the device layout of the present invention.
[0017] The present invention provides a distributed detection device for coal-rock interface in a fully mechanized mining working face, such as Figure 1 As shown, the device mainly includes: a centralized control terminal A placed near the fully mechanized mining face (the operating terminal in the specific implementation manner is an explosion-proof tablet computer, an explosion-proof mobile phone or an explosion-proof server), a relay module B1 B2 ... B placed on the outside of the rear shield beam of the hydraulic support k , Coal-rock interface recognition sensor C1C2……C installed on the front beam of the hydraulic support n (n>k, and n is a multiple of k), coal-rock interface recognition sensor C1 C2……C n Each comprises a detection sensor and a retractable bracket.
[0018] like Figure 1 As shown, the centralized control terminal A and the data interaction processing relay module B1 B2...B k Connected via wireless network or Ethernet, data exchange processing relay module B1 B2...B k Coal-rock interface recognition sensor C1 C2...C n Connected by wireless network, coal-rock interface recognition sensor C1 C2...C n Distributed installation on the front beam of the hydraulic support, used to collect coal-rock interface data, data interaction processing relay module B1B2...B k Collect the corresponding coal-rock interface identification sensor data and send it to the centralized control terminal A.
[0019] A distributed detection method for coal-rock interface in a fully mechanized mining face mainly comprises: a centralized control terminal A transmits a start instruction and acquisition parameter information such as a time window, a sampling point, and a superposition number through a relay module B1B2...B k Send to coal-rock interface recognition sensor C1 C2...C n , coal-rock interface recognition sensor C1 C2...C n After receiving the command and collecting parameter information, the built-in retractable bracket can be extended to the coal-rock detection surface and start collecting coal-rock interface data. The collected data is then processed by the interactive relay module B1 B2...B k The data is sent to the centralized control terminal A, which processes, analyzes and extracts the collected data to obtain the actual position of the coal-rock interface, integrates the actual positions of the coal-rock interfaces of multiple coal-rock interface identification sensors, and generates the coal-rock interface contour lines of the current hydraulic support location.
[0020] The calculation method for generating the contour line of the coal-rock interface at the current position of the hydraulic support by the centralized control terminal A after data processing and recognition is as follows: The actual position D of the coal-rock interface of the n = 100th coal-rock interface recognition sensor can be calculated according to D = d1 + d2, where d1 is the suspended height of the air-coupled antenna and can be calculated according to the formula d1 = v0(t1 - t0) / 2, and d2 is the coal seam thickness, which can be calculated according to the following calculation. The starting zero point of the detection distance is set at the 1 / 2 cycle position of the direct wave, denoted as t0 = 1*10^(-9)s. The following steps are taken to process the collected data: ① Zero line setting; ② Background noise removal; ③ One-dimensional filtering; ④ Gain. v0 = 3*10^8m / s is the propagation speed of electromagnetic waves in a vacuum, t1 = 3*10^(-9)s is the time when the antenna receives the reflection wave from the "air-coal" interface, t2 = 1.3*10^(-8)s is the time when the antenna receives the reflection wave from the "coal-rock" interface, and ε = 9 is the relative dielectric constant of the coal seam. Finally, D = 80cm can be calculated. The actual positions of the coal-rock interfaces of multiple coal-rock interface sensors are calculated simultaneously, and the contour line of the coal-rock interface at the current position of the hydraulic support can be obtained.
[0021] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A distributed detection device for coal-rock interface in fully-mechanized mining face, characterized in that: The device for detecting the coal-rock interface by networking distributed sensors mainly includes: a centralized control terminal A placed near the fully-mechanized mining face, relay modules B1, B2,..., B placed on the outer side of the rear shield beam of the hydraulic support k , and coal-rock interface identification sensors C1, C2,..., C placed on the front beam of the hydraulic support n (n > k and n is a multiple of k).
2. The distributed detection device for coal-rock interface in fully-mechanized mining face according to claim 1, characterized in that: The centralized control terminal A is connected to the data interaction processing relay modules B1, B2, …, B k through a wireless network or Ethernet. The data interaction processing relay modules B1, B2, …, B k are connected to the coal-rock interface recognition sensors C1, C2, …, C n through a wireless network. Among them, the coal-rock interface recognition sensors C1, C2, …, C n are distributedly installed on the front beam of the hydraulic support and are used to collect coal-rock interface data. The data interaction processing relay modules B1, B2, …, B k are installed on the outer side of the rear shield beam and are used to collect the data of the corresponding coal-rock interface recognition sensors and send them to the centralized control terminal A placed near the fully-mechanized coal face.
3. The distributed detection device for coal-rock interface in fully-mechanized mining face according to claim 1, characterized in that: The coal-rock interface recognition sensors C1, C2, ……, C n each include a detection sensor and a telescopic support. According to the mining state of the coal mining machine, the coal-rock interface recognition sensors C1, C2, ……, C n are divided into two states. During the coal mining process of the coal mining machine, the coal-rock interface recognition sensors C1, C2, ……, C n are in the closed state, the telescopic support inside them retracts to the front beam floor, and the detection sensors are in the standby state; after the coal mining machine completes the mining of the current cutting face and moves to the next cutting face, the centralized control terminal A sends a work start instruction, which is relayed through the data interaction processing relay modules B1, B2, ……, B k to the coal-rock interface recognition sensors C1, C2, ……, C n . After receiving the instruction, the telescopic support inside them extends to the coal-rock detection surface, and the detection sensors start to work.
4. A distributed detection method for coal-rock interface in fully-mechanized mining face, characterized in that: The coal-rock interface recognition method for the distributed sensor networking in the fully-mechanized mining face includes: The centralized control terminal A sends the start command and acquisition parameter information such as time window, sampling points, and stacking times to the relay modules B1, B2,..., B k and then distributes them to the coal-rock interface recognition sensors C1, C2,..., C n . After receiving the command and acquisition parameter information, the coal-rock interface recognition sensors C1, C2,..., C n extend the built-in retractable support to the coal-rock detection surface and start collecting coal-rock interface data. Subsequently, the collected data is sent to the centralized control terminal A via the interactive processing relay modules B1, B2,..., B k . The centralized control terminal A processes, analyzes, and extracts the collected data to obtain the actual position of the coal-rock interface, and integrates the actual positions of the coal-rock interfaces of multiple coal-rock interface recognition sensors to generate the coal-rock interface contour line at the position where the current hydraulic support is located.
5. The calculation method for generating the contour line of the coal-rock interface at the current position of the hydraulic support after the centralized control terminal A processes and identifies the data is as follows: Set the 1 / 2 cycle position of the direct wave as the starting zero point of the detection distance, denoted as t0, and perform the following steps on the collected data: ① Zero line setting; ② Background noise removal; ③ One-dimensional filtering; ④ Gain. The suspended height d1 of the air-coupled antenna can be calculated according to the formula d1 = v0(t1 - t0) / 2. The coal seam thickness d2 can be calculated according to the formula Calculated, the actual position D of the coal-rock interface of a single coal-rock identification sensor can be calculated according to the formula D = d1 + d2, where v0 is the propagation speed of electromagnetic waves in vacuum, t1 is the time when the antenna receives the reflection wave of the "air-coal" interface, t2 is the time when the antenna receives the reflection wave of the "coal-rock" interface, and ε is the relative dielectric constant of the coal seam.
6. The distributed detection method for coal-rock interface in fully-mechanized mining face according to claim 4, characterized in that: After the current cutting face is mined, the centralized control terminal A sends the end command to the coal-rock interface recognition sensors C1, C2,..., C k via the relay modules B1, B2,..., B n . After receiving the command, the supports retract and stop working, and the hydraulic supports move forward. This process is repeated for the next cutting face. n