An intelligent control system for backfilling with paste in a fully mechanized mining frame

Abstract

The utility model belongs to mine filling automation control technical field, concretely is a kind of intelligent control system of paste filling coal mining behind fully mechanized support frame. Including execution device, the execution device includes: water reservoir, for storing water;Fly ash feeding device, for storing fly ash;Additive feeding device, for storing additive;Stirring device, the stirring device is connected with water reservoir, fly ash feeding device and additive feeding device respectively, for stirring the mixture of water, fly ash and additive;Filling pump, through filling pipeline, the mixture after stirring in stirring device will be introduced behind working face hydraulic support;Control system, the control system includes PLC controller, for controlling execution device;Monitoring station, including industrial control server, industrial control large screen and video monitoring large screen.

Description

Technical Field

[0001] This utility model belongs to the field of automated control technology for mine backfilling, specifically an intelligent control system for paste backfilling coal mining after fully mechanized mining frame. Background Technology

[0002] The fully mechanized coal mining technology of backfilling with paste mainly uses fly ash, cement and gangue as the main backfilling materials. With the help of additive materials, the paste is mixed in a certain proportion to form a paste with a certain concentration. The paste is then pumped into the mine through pipeline using a backfilling pump and filled into the goaf behind the hydraulic support of the working face.

[0003] The fully mechanized coal mining technology of backfilling with cemented slurry is based on the existing fully mechanized coal mining face. The cemented slurry backfilling pipeline is introduced behind the hydraulic support of the working face. The space mined by the coal mining machine is used for backfilling. It can be continuously backfilled as the working face advances. At the same time, the hydraulic support of the working face is modified so that after the coal mining machine advances, the support is adjusted to set up baffles and hang backfilling bags. The cemented slurry is then filled into the backfilling bags. At the same time, the support has a certain ability to block the slurry and prevent the backfilled slurry from flowing into the working face.

[0004] Traditional methods for managing goaf areas in coal mines primarily employ delayed backfilling or caving methods to manage the roof, which present two major technical bottlenecks:

[0005] Poor filling timeliness: Conventional paste filling requires concentrated operation after the working face is completely mined out. Long-term lack of roof support leads to settlement risk and easily induces roadway deformation and surface collapse.

[0006] Low process controllability: The proportioning depends on manual experience, and the fluctuation of fly ash particle size and the error of water metering lead to unstable paste strength;

[0007] Frequent blockages in filling pipelines, lack of real-time health monitoring of pumping equipment, and maintenance shutdowns affecting the connection between mining and filling processes.

[0008] Therefore, there is an urgent need to develop a filling control system that integrates intelligent proportioning and control, fault prediction and multi-terminal collaboration, in order to overcome the technical barriers to filling efficiency and safety. Summary of the Invention

[0009] In order to solve the above problems, this utility model provides an intelligent control system for coal mining with paste filling after the fully mechanized mining frame.

[0010] This utility model adopts the following technical solution: an intelligent control system for paste filling coal mining after a fully mechanized mining frame, comprising:

[0011] An execution device, the execution device comprising:

[0012] A reservoir is used to store water;

[0013] Fly ash feeding device, used for storing fly ash;

[0014] An additive feeding device for storing additives;

[0015] A mixing device is connected to a water storage tank, a fly ash feeding device, and an additive feeding device, respectively, and is used to mix water, fly ash, and additives.

[0016] The filling pump introduces the mixture stirred in the mixing device into the rear of the hydraulic support of the working face through the filling pipeline;

[0017] A control system, comprising a PLC controller for controlling the actuators;

[0018] The monitoring station includes an industrial control server, an industrial control screen, and a video surveillance screen.

[0019] The support coordination mechanism integrates the tilt sensor and filling bag mounting device of the hydraulic support. The tilt sensor detects the position of the coal mining machine in real time and triggers the baffle lifting and the filling bag unfolding action.

[0020] The data hub platform is a time-series database that stores data from various sensors.

[0021] In some embodiments, a laser particle size analyzer is installed at the discharge port of the fly ash feeding device, and an electromagnetic flow meter is installed on the water inlet pipe of the water storage tank. The signal output terminals of both are connected to a PLC controller.

[0022] The filling pipeline includes a forward filling pipeline and a reverse flushing pipeline. A three-way reversing valve is installed at the outlet section of the filling pump, with the two ends of the three-way reversing valve connected to the forward filling pipeline and the reverse flushing pipeline, respectively.

[0023] In some embodiments, a vibration sensor is fixed on the filling pump, and an infrared temperature probe is embedded in the surface of the filling pump.

[0024] The vibration sensor and infrared temperature probe are connected to the PLC controller via cables.

[0025] In some embodiments, a gamma density meter and a temperature sensor are installed on the outlet pipe section of the stirring device, and the two are coaxially encapsulated in a stainless steel protective cover.

[0026] The protective cover contains a temperature compensation circuit board, whose input is connected to a temperature sensor and whose output is connected to the signal conditioning circuit of a gamma density meter.

[0027] In some embodiments, an explosion-proof mobile terminal is also included, which is physically connected to the RS485 interface of the PLC controller via an aviation plug;

[0028] The health status indicator matrix of the industrial large screen surface integrated equipment includes vibration exceeding standard lights and temperature abnormality lights.

[0029] In some embodiments, a remote monitoring system is also included, comprising:

[0030] The data acquisition switcher is used to acquire data from vibration sensors and infrared temperature probes and display it on a large video monitoring screen.

[0031] In some embodiments, the data acquisition switch is connected to an industrial control server, and the front panel of the industrial control server chassis is equipped with a three-color alarm light.

[0032] In some embodiments, a mobile remote monitoring terminal is also included, which includes:

[0033] The server has a fiber optic communication interface for connecting to a PLC controller.

[0034] The mobile phone's signal is connected to the server.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] Intelligent control and collaborative operation throughout the entire process:

[0037] By using tilt sensors to trigger the expansion of filling bags in real time, laser particle size analyzers and electromagnetic flowmeters to control the mixing ratio in a closed loop, and gamma density meters to monitor the paste strength online, combined with the coordinated scheduling of a PLC central control system, the entire process of "coal mining-support shifting-filling" is automated. This significantly improves the timeliness of filling and effectively suppresses roof subsidence and surface collapse.

[0038] Multi-dimensional fault early warning and remote operation and maintenance capabilities:

[0039] Vibration sensors and infrared temperature probes form a dual-redundant monitoring system for the health status of filling pumps. Combined with a matrix of equipment health indicator lights and a three-color alarm light, fault location is achieved within seconds. Fiber optic communication and mobile remote monitoring terminals support multi-terminal collaborative operation and maintenance both underground and on the ground, reducing the rate of sudden equipment failures, decreasing the frequency of manual inspections underground, and significantly improving the level of safe production in coal mines. Attached Figure Description

[0040] Figure 1 This is a ground layout diagram of the actuator in this application;

[0041] Figure 2 This is a working diagram of the hydraulic support in this application;

[0042] Figure 3 This is a schematic diagram of the present application;

[0043] In the diagram: 1-Water storage tank, 2-Fly ash feeding device, 3-Additive feeding device, 4-Mixing device, 5-Filling pump, 6-Filling pipeline, 7-Tilt sensor, 8-Filling bag mounting device, 9-Laser particle size analyzer, 10-Electromagnetic flowmeter, 11-PLC controller, 12-Temperature compensation circuit board, 13-Temperature sensor, 14-Vibration sensor, 15-Infrared temperature probe, 16-Gamma density meter, 17-Explosion-proof mobile terminal, 18-Equipment health status indicator matrix, 19-Vibration exceedance light, 20-Temperature anomaly light, 21-Data acquisition switcher, 22-Server, 23-Mobile phone. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0045] like Figure 1-3 As shown, an intelligent control system for paste backfilling coal mining after a fully mechanized mining frame includes:

[0046] An execution device, the execution device comprising:

[0047] Water storage tank 1 is used to store water;

[0048] Fly ash feeding device 2 is used to store fly ash;

[0049] Additive feeding device 3 is used to store additives;

[0050] A stirring device 4 is connected to a water storage tank 1, a fly ash feeding device 2, and an additive feeding device 3, respectively, and is used to stir a mixture of water, fly ash, and additives.

[0051] The filling pump 5, through the filling pipeline 6, introduces the mixture stirred in the mixing device 4 into the rear of the hydraulic support of the working face;

[0052] The control system includes a PLC controller 11 for controlling the actuators;

[0053] The monitoring station includes an industrial control server, an industrial control screen, and a video surveillance screen.

[0054] The support coordination mechanism integrates the tilt sensor 7 and the filling bag mounting device 8 into the hydraulic support. The tilt sensor 7 detects the position of the coal mining machine in real time and triggers the baffle lifting and the filling bag unfolding action.

[0055] The data hub platform is a time-series database that stores data from various sensors.

[0056] The tilt sensor 7 monitors the position of the coal mining machine in real time. When the coal mining machine moves its support, a signal is triggered, which automatically unfolds the filling bag mounting device 8. The mixing device 4 mixes water, fly ash, and additives according to a preset ratio to form a paste. After being pressurized by the filling pump 5, the paste is injected into the filling bag behind the hydraulic support through the filling pipeline 6. The PLC controller 11 integrates sensor data and controls the filling process in real time through the monitoring station. This achieves automated coordination between coal mining and filling, reducing the time the roof is suspended. The time-series database supports full-process data traceability, improving mining safety.

[0057] Specifically, a laser particle size analyzer 9 is installed at the discharge port of the fly ash feeding device 2, and an electromagnetic flow meter 10 is installed on the inlet pipe of the water storage tank 1. The signal output terminals of both are connected to the PLC controller 11. The filling pipeline 6 includes a forward filling pipeline and a reverse flushing pipeline. A three-way reversing valve is installed on the outlet pipe section of the filling pump 5. The two ends of the three-way reversing valve are respectively connected to the forward filling pipeline and the reverse flushing pipeline.

[0058] A laser particle size analyzer (9) monitors the particle size distribution of fly ash in real time, an electromagnetic flow meter (10) accurately measures water volume, and the data is fed back to the PLC controller (11) for dynamic adjustment of the mixing ratio; a three-way reversing valve switches the pipeline direction: conveying paste during forward filling and cleaning pipeline residue with clean water during reverse flushing. Dual closed-loop control of particle size and flow rate ensures paste uniformity; the reverse flushing function prevents pipeline blockage and reduces maintenance costs.

[0059] Specifically, a vibration sensor 14 is fixed on the filling pump 5, and an infrared temperature probe 15 is embedded on the surface of the filling pump 5; the vibration sensor 14 and the infrared temperature probe 15 are connected to the PLC controller 11 via a cable.

[0060] Vibration sensor 14 detects abnormal vibration of the filling pump bearing, and infrared temperature probe 15 monitors the temperature rise of the motor windings; the data is transmitted to PLC controller 11 in real time, triggering an alarm or shutdown when the threshold is exceeded. This helps to predict mechanical failures (such as bearing wear or overheating) and avoid sudden damage to the pump body, thus reducing unplanned downtime of downhole equipment.

[0061] Specifically, a gamma density meter 16 and a temperature sensor 13 are installed on the outlet pipe section of the stirring device 4, and the two are coaxially encapsulated in a stainless steel protective cover. A temperature compensation circuit board 12 is installed inside the protective cover, with its input end connected to the temperature sensor 13 and its output end connected to the signal conditioning circuit of the gamma density meter 16.

[0062] The gamma density meter 16 emits gamma rays that penetrate the paste, and calculates the real-time density by the ray attenuation rate; the temperature sensor 13 data is corrected by the compensation circuit board 12 to eliminate the interference of temperature on density measurement.

[0063] Specifically, it also includes an explosion-proof mobile terminal 17, which is physically connected to the RS485 interface of the PLC controller 11 via an aviation plug; the industrial large screen surface integrated equipment health status indicator matrix 18 includes a vibration exceeding standard light 19 and a temperature abnormality light 20.

[0064] The explosion-proof mobile terminal 17 directly reads PLC data via RS485 interface, supporting mobile inspection underground; the equipment health status indicator matrix 18 intuitively displays the fault type, such as the vibration exceeding standard light 19 / temperature abnormal light 20 lighting up.

[0065] Specifically, it also includes a remote monitoring system, including: a data acquisition switch 21, used to acquire data from the vibration sensor 14 and the infrared temperature probe 15 and display it on a large video monitoring screen.

[0066] The system collects vibration / temperature data from the switch 21, prioritizing the display of abnormal signals on the large video monitoring screen; it also links with the industrial control server to generate equipment health trend charts. Key parameters are centrally monitored and visualized, reducing the burden of manual inspections; abnormal data is highlighted to avoid information omissions.

[0067] Specifically, the data acquisition switch 21 is connected to the industrial control server, and the front panel of the industrial control server chassis is equipped with a three-color alarm light.

[0068] The industrial control server analyzes and collects data uploaded by switcher 21, and controls the three-color alarm lights (red light - emergency / yellow light - warning / green light - normal) when a threshold is triggered; the alarm signal is simultaneously pushed to the monitoring station. Multi-level audible and visual alarms improve the efficiency of anomaly identification; redundant physical indicator lights prevent the risk of software system failure.

[0069] Specifically, it also includes a mobile remote monitoring terminal, which includes a server 22 with a fiber optic communication interface for connecting to the PLC controller 11; and a mobile phone 23, which is connected to the server 22 via a signal.

[0070] Server 22 acquires PLC data at high speed via a fiber optic interface, converts the data according to the protocol, and pushes it to the cloud; mobile APP 23 subscribes to server data and remotely views filling status and alarm information. This supports remote monitoring by administrators, improving system operation and maintenance flexibility.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A smart control system for paste backfilling in coal mining after a fully mechanized mining frame, characterized in that, include: An execution device, the execution device comprising: Water storage tank (1), used for storing water; Fly ash feeding device (2) is used to store fly ash; Additive feeding device (3), used for storing additives; A stirring device (4) is connected to a water storage tank (1), a fly ash feeding device (2) and an additive feeding device (3) respectively, and is used to stir a mixture of water, fly ash and additives. The filling pump (5) introduces the mixture stirred in the mixing device (4) into the back of the hydraulic support of the working face through the filling pipeline (6); The control system includes a PLC controller (11) for controlling the actuator; The monitoring station includes an industrial control server, an industrial control screen, and a video surveillance screen. The support coordination mechanism is integrated with the tilt sensor (7) and the filling bag mounting device (8) of the hydraulic support. The tilt sensor (7) detects the position of the coal mining machine in real time and triggers the baffle lifting and filling bag unfolding actions. The data hub platform is a time-series database that stores data from various sensors.

2. The intelligent control system for backfilling coal mining after the fully mechanized mining frame as described in claim 1, characterized in that: The fly ash feeding device (2) is equipped with a laser particle size analyzer (9) at the discharge port and an electromagnetic flow meter (10) is installed in the water inlet pipe of the water storage tank (1). The signal output terminals of both are connected to the PLC controller (11). The filling pipeline (6) includes a forward filling pipeline and a reverse flushing pipeline. A three-way reversing valve is installed on the outlet section of the filling pump (5). The two ends of the three-way reversing valve are connected to the forward filling pipeline and the reverse flushing pipeline, respectively.

3. The intelligent control system for paste backfilling coal mining after the fully mechanized mining frame according to claim 2, characterized in that: A vibration sensor (14) is fixed on the filling pump (5), and an infrared temperature probe (15) is embedded on the surface of the filling pump (5). The vibration sensor (14) and the infrared temperature probe (15) are connected to the PLC controller (11) via cables.

4. The intelligent control system for paste backfilling coal mining after the fully mechanized mining frame according to claim 1, characterized in that: The outlet pipe section of the stirring device (4) is equipped with a gamma density meter (16) and a temperature sensor (13), which are coaxially encapsulated in a stainless steel protective cover. The protective cover is equipped with a temperature compensation circuit board (12), whose input end is connected to a temperature sensor (13) and whose output end is connected to the signal conditioning circuit of a gamma density meter (16).

5. The intelligent control system for paste backfilling coal mining after the fully mechanized mining frame according to claim 1, characterized in that: It also includes an explosion-proof mobile terminal (17), which is physically connected to the RS485 interface of the PLC controller (11) via an aviation plug; The industrial control large screen surface integrated device health status indicator matrix (18) includes a vibration exceeding standard light (19) and a temperature abnormality light (20).

6. The intelligent control system for paste backfilling coal mining after the fully mechanized mining frame according to claim 3, characterized in that, It also includes remote monitoring systems, including: The acquisition switch (21) is used to acquire data from the vibration sensor (14) and the infrared temperature probe (15) and display it on the video monitoring screen.

7. The intelligent control system for paste backfilling coal mining after the fully mechanized mining frame according to claim 6, characterized in that: The acquisition switch (21) is connected to the industrial control server, and the front panel of the industrial control server chassis is equipped with a three-color alarm light.

8. The intelligent control system for paste backfilling coal mining after the fully mechanized mining frame according to claim 1, characterized in that, It also includes a mobile remote monitoring terminal, which includes: Server (22), Server (22) has a fiber optic communication interface for connecting to PLC controller (11). Mobile phone (23), the signal of which is connected to server (22).

Images