CN109441548B - Intelligent fully-mechanized mining equipment - Google Patents
Intelligent fully-mechanized mining equipment Download PDFInfo
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- CN109441548B CN109441548B CN201910005212.1A CN201910005212A CN109441548B CN 109441548 B CN109441548 B CN 109441548B CN 201910005212 A CN201910005212 A CN 201910005212A CN 109441548 B CN109441548 B CN 109441548B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Abstract
The invention relates to intelligent fully-mechanized mining equipment. The intelligent fully-mechanized coal mining equipment comprises a working face hydraulic support, a coal mining machine, a scraper conveyor, a transfer conveyor, a belt conveyor, a fan, a pump station and an underground monitoring host, wherein the working face hydraulic support comprises a middle support and end supports at two ends of the middle support, the middle support and the end supports are respectively provided with a hydraulic upright post and a traction cylinder, the coal mining machine, the scraper conveyor, the transfer conveyor, the belt conveyor, the fan and the pump station are respectively provided with a driving motor, the underground monitoring host is provided with a mining fiber grating demodulator, and the driving motors of the coal mining machine, the scraper conveyor, the transfer conveyor, the belt conveyor, the fan and the pump station are respectively provided with a mining fiber grating temperature sensor and a mining fiber grating vibration sensor.
Description
Technical Field
The invention relates to intelligent fully-mechanized mining equipment.
Background
Along with the development of coal mining technology modernization and the progress of scientific technology, the fully-mechanized mining equipment has more and more perfect functions, more and more complex structures and higher automation degree. On one hand, the comprehensive mechanized coal mining is used as an important sign of modernization of coal mining technology, so that not only is the automation degree of a coal mine working face improved, but also the coal mining cost is reduced, and better economic and social benefits are brought. On the other hand, due to the rapid increase of factors influencing the operation of the equipment, the potential possibility of failure or failure of the equipment is also increased, and the failure of one part often causes chain lock reaction, so that the whole equipment and even the whole production process cannot normally operate or even break down.
In order to ensure production, the coal mine monitoring and controlling system in China follows the world trend and research and development direction, and various monitoring and controlling systems based on new technologies are developed, but the systems are mainly concentrated on monitoring in the aspect of mine safety, the monitoring of coal mine electric equipment is also mainly concentrated on monitoring of a main ventilator, the research of a conveying equipment monitoring system is still in a starting stage, and how to realize fault early warning and ensure safe and efficient operation of equipment becomes a problem to be solved urgently.
Disclosure of Invention
The technical problem to be solved by the invention is how to overcome the defects in the prior art and provide intelligent fully-mechanized mining equipment.
For solving above-mentioned technical problem, this intelligent comprehensive equipment of adopting, including working face hydraulic support, coal-winning machine, scraper conveyor, reversed loader, band conveyer, fan, pump station and monitoring host computer in pit, the working face hydraulic support includes the end support at intermediate support and intermediate support both ends, is equipped with hydraulic column and traction cylinder on intermediate support and the end support respectively, and coal-winning machine, scraper conveyor, reversed loader, band conveyer, fan, pump station are furnished with driving motor respectively, its characterized in that: the underground monitoring host is provided with a mining fiber grating demodulator, the driving motors of the coal mining machine, the scraper conveyor, the reversed loader, the belt conveyor, the fan and the pump station are respectively provided with a mining fiber grating temperature sensor and a mining fiber grating vibration sensor, wherein the mining fiber grating temperature sensor is arranged at the output shaft of the corresponding driving motor, the mining fiber grating vibration sensor is arranged on the shell of the corresponding driving motor, the fan and the pump station are respectively provided with a mining fiber grating pressure sensor, the mining fiber grating pressure sensors are respectively arranged on the outlet pipe of the fan and the outlet pipe of the emulsion, and the underground monitoring host calculates the health index H of the driving motor of the scraper conveyor, the reversed loader, the belt conveyor and the fan according to the following formula 1
Wherein T is the temperature of the corresponding driving motor, T min T is the minimum value of the temperature of the normal operation of the corresponding driving motor max For the temperature of the normal operation of the corresponding driving motorThe maximum value of the degree, Z is the current vibration value of the corresponding driving motor, Z min To the vibration minimum value of the normal operation of the corresponding driving motor, Z max For the maximum vibration value of the normal operation of the corresponding driving motor, when the corresponding driving motor is started or T is less than T min Or Z < Z min When the motor is stopped, the temperature value and the vibration value before the corresponding driving motor stops last time are selected for t and z,
if H 1 The method comprises the steps that (1) the current temperature and the current vibration of the corresponding driving motor are equal to the minimum temperature and the minimum vibration value of the normal operation of the corresponding driving motor, the corresponding driving motor is in an ideal working state completely, the underground monitoring host computer displays that the working state of the corresponding driving motor is excellent, and no alarm is sent;
if 0 is less than H 1 If the current temperature of the corresponding driving motor is less than 1, the current vibration of the corresponding driving motor is between the minimum normal operation temperature and the maximum normal operation temperature of the corresponding driving motor, the current vibration of the corresponding driving motor is between the minimum normal operation vibration value and the maximum normal operation vibration value of the corresponding driving motor, the corresponding driving motor is in a normal working state, and the underground monitoring host computer displays that the corresponding driving motor works normally without giving any alarm and continues monitoring;
If H 1 If the current temperature of the corresponding driving motor is less than or equal to 0, indicating that the current vibration of the corresponding driving motor is at the maximum temperature of the normal operation of the corresponding driving motor, wherein the current vibration of the corresponding driving motor is at the maximum vibration value of the normal operation of the corresponding driving motor, and the corresponding driving motor is in a dangerous working state, the underground monitoring host displays that the corresponding driving motor works abnormally, does not send an alarm, informs a worker to reduce the working load of the corresponding driving motor as soon as possible, and arranges maintenance as soon as possible;
the downhole monitoring host calculates the health index H of the driving motor of the coal mining machine according to the following formula 2
Wherein i is the current working current of the driving motor of the coal mining machine,I min for the minimum value of the working current of the normal operation of the driving motor of the coal mining machine, I max For the maximum value of the working current of the normal operation of the driving motor of the coal mining machine, when the driving motor of the coal mining machine is started, or I is less than I min When the coal mining machine is started, i is the working current value before the driving motor of the coal mining machine stops last time,
if H 2 The method comprises the steps that (1) the current working current of a coal cutter driving motor is equal to the minimum working current of the normal operation of the coal cutter driving motor, the corresponding driving motor is in an ideal working state completely, the underground monitoring host computer displays that the coal cutter driving motor is in the ideal working state completely, and no alarm is sent out;
If 0.7 < H 2 If the current working current of the coal cutter driving motor is less than 1, the current working current of the coal cutter driving motor is between the minimum working current of the normal operation of the coal cutter driving motor and the maximum working current of the normal operation, and is closer to the minimum working current of the normal operation of the corresponding coal cutter driving motor, and the underground monitoring host computer displays that the coal cutter driving motor works excellently without giving any alarm and continues monitoring when the coal cutter driving motor is in a good working state;
if 0.5 is less than H 2 If the current working current of the coal cutter driving motor is less than or equal to 0.7, indicating that the current working current of the coal cutter driving motor is between the minimum working current of the normal operation of the coal cutter driving motor and the maximum working current of the normal operation of the coal cutter driving motor, and displaying that the coal cutter driving motor works normally by the underground monitoring host without giving any alarm and continuing monitoring;
if 0 is less than H 2 If the current working current of the coal cutter driving motor is less than or equal to 0.5, the current working current of the coal cutter driving motor is between the minimum working current of the normal operation of the coal cutter driving motor and the maximum working current of the normal operation, but is closer to the maximum working current of the normal operation of the corresponding coal cutter driving motor, the coal cutter driving motor is in a bad working state, the underground monitoring host displays that the coal cutter driving motor works abnormally, an alarm is sent, and a worker is informed to reduce the working load of the corresponding driving motor as soon as possible, and overhaul is arranged as soon as possible;
If H 2 If the current working speed is less than or equal to 0, the current working speed of the driving motor of the coal mining machine is describedThe working current is equal to or greater than the maximum working current of the normal operation of the coal cutter driving motor, the coal cutter driving motor is in an extremely dangerous working state, the underground monitoring host displays that the coal cutter driving motor works abnormally, an alarm is sent out, and workers are informed of stopping and overhauling as soon as possible;
the health index H of the emulsion pump is calculated by the underground monitoring host according to the following formula 3
Wherein T is the temperature of the corresponding driving motor, T min T is the minimum value of the temperature of the normal operation of the corresponding driving motor max For the maximum value of the temperature of the normal operation of the corresponding driving motor, Z is the current vibration value of the corresponding driving motor, Z min To the vibration minimum value of the normal operation of the corresponding driving motor, Z max For the maximum vibration value of the normal operation of the corresponding driving motor, Y is the outlet pressure of the current emulsion pump, Y min For the minimum value of the normal operation outlet pressure of the emulsion pump, Y max For maximum value of outlet pressure of emulsion pump in normal operation, when the emulsion pump is started or T is less than T min Or Z < Z min Or Y < Y min When the emulsion pump is stopped, the temperature value, the vibration value and the outlet pressure value before the last emulsion pump is stopped are selected as t, z and y,
if H 3 The method comprises the steps that (1) the current temperature and the current vibration of a corresponding emulsion pump are equal to the minimum temperature and the minimum vibration value of the normal operation of the emulsion pump, the current outlet pressure of the emulsion pump is equal to the maximum outlet pressure value of the normal operation of the emulsion pump, the corresponding driving motor is in an ideal working state completely, the underground monitoring host computer displays that the emulsion pump works well, and no alarm is sent;
If 0 is less than H 3 If the current temperature of the emulsion pump is less than 1, the current vibration of the emulsion pump is between the minimum normal operation temperature and the maximum normal operation temperature of the corresponding driving motor, and the current vibration of the emulsion pump is between the minimum normal operation vibration value and the maximum normal operation vibration value of the emulsion pumpThe current outlet pressure of the chemical liquid pump is between the minimum outlet pressure value and the maximum outlet pressure value of the emulsion pump in normal operation, the emulsion pump is in a normal working state, the underground monitoring host computer displays that the emulsion pump works normally, no alarm is sent, and monitoring is continued;
if H 3 And if the temperature of the emulsion pump is less than or equal to 0, indicating that the current temperature of the emulsion pump is greater than or equal to the maximum temperature of the emulsion pump in normal operation and/or the current vibration of the emulsion pump is greater than or equal to the maximum vibration value of the emulsion pump in normal operation and/or the current outlet pressure of the emulsion pump is less than or equal to the minimum outlet pressure value of the emulsion pump in normal operation, displaying abnormal operation of the emulsion pump by a downhole monitoring host under dangerous working state, giving an alarm, and notifying staff to arrange maintenance as soon as possible.
As optimization, the root of the cylinder body of each hydraulic upright post is provided with an interface tube which is communicated with the inner cavity of the cylinder body, the interface tube is provided with a hydraulic sensor, the hydraulic sensor comprises a shell, a chargeable storage battery, a piezoelectric ceramic plate, a radio emission integrated circuit and a pressure measuring switch, the components are connected into a controllable loop, the radio emission integrated circuit comprises a signal amplifying module, a coding module and a radio emission module, and when the hydraulic supports of all working faces are moved, the pressure measuring switch can cut off the power supply of the radio emission integrated circuit, and all the hydraulic upright posts jointly set a rated maximum working pressure.
The casing is the cylinder, the casing middle section is equipped with the baffle, this baffle divide into outer room and inner room with the casing, piezoceramics piece installs in the inner room, chargeable battery and radio emission integrated circuit install in the outer room, piezoceramics piece is the disc, the parcel has the insulating layer on its outer circumference, its upper and lower surface is equipped with the electrode slice respectively, above-mentioned electrode slice passes through the lead wire and links to each other with radio emission integrated circuit's signal amplification module's input, chargeable battery is radio emission integrated circuit power supply, be equipped with explosion-proof interface that charges on the casing, explosion-proof interface that charges meets with chargeable battery, piezoceramics piece lower surface still is equipped with a ripple sealing disk, ripple sealing disk outer fringe is equipped with copper sealing pad, the inner room lower extreme is equipped with the screw thread through-hole, screw thread through-hole upper end is equipped with annular round platform, the interface pipe is equipped with corresponding external screw thread, the casing is through its screw thread through-hole install on above-mentioned interface pipe, and ripple sealing disk outer fringe and copper sealing pad are held between interface pipe and annular round platform.
The underground monitoring host is also provided with a mining fiber bragg grating demodulator and a radio receiving integrated circuit, and the radio receiving integrated circuit comprises a radio receiving module and a decoding module.
The hydraulic sensor is provided with a special code, all the hydraulic upright posts are synchronously closed in the state of supporting the top plate, each radio emission integrated circuit emits the collected floating liquid hydraulic signal to the underground monitoring host machine every 10 seconds, and simultaneously emits the code of the corresponding hydraulic sensor, the underground monitoring host machine compares the collected liquid pressure inside the hydraulic upright posts sent by the hydraulic sensors of each hydraulic upright post with the rated maximum working pressure,
if the pressure of the liquid in the hydraulic upright posts sent by the hydraulic sensors of each hydraulic upright post is less than or equal to the rated maximum working pressure, all the hydraulic upright posts are in a normal working state, the underground monitoring host computer displays that each hydraulic upright post works well, does not send any alarm, and continues to monitor;
if the pressure of the liquid in the hydraulic upright post sent by the hydraulic sensors of part of the hydraulic upright posts is larger than the rated maximum working pressure, calculating arithmetic mean of the pressure of the liquid in the hydraulic upright posts sent by the hydraulic sensors of all the hydraulic upright posts by a downhole monitoring host machine, comparing the arithmetic mean with the rated maximum working pressure,
if the arithmetic mean is less than or equal to the rated maximum working pressure, each hydraulic upright post is in an adjustable working state, the height of the hydraulic upright post with the highest internal liquid pressure is reduced manually or through an underground monitoring host, the height is reduced by 2-3 cm each time, the height of the hydraulic upright post with the lowest internal liquid pressure is increased if necessary, the height is increased by 1 cm each time, until the internal liquid pressure of all the hydraulic upright posts is less than or equal to the rated maximum working pressure,
If the arithmetic average is larger than the rated maximum working pressure, each hydraulic upright post is in a dangerous working state, the height of the hydraulic upright post with the highest internal liquid pressure is reduced by the underground monitoring host, the height is reduced by 2-3 cm each time, the height of the hydraulic upright post with the lowest internal liquid pressure is increased if necessary, the height is increased by 1 cm each time until the internal liquid pressure of all the hydraulic upright posts is smaller than or equal to the rated maximum working pressure,
if the internal liquid pressure of the hydraulic upright posts sent by the hydraulic sensors of all the hydraulic upright posts is greater than the rated maximum working pressure, each hydraulic upright post is in a high-risk working state, the underground monitoring host machine gives an alarm to inform personnel on the working face of evacuation, meanwhile, the height of the hydraulic upright post with the highest internal liquid pressure is reduced by the underground monitoring host machine, the height is reduced by 2-3 cm each time, until the internal liquid pressure of all the hydraulic upright posts is less than or equal to the rated maximum working pressure, and after the top plate of the working face is stable, the underground monitoring host machine informs the personnel to enter the working face for working.
As is well known, hydraulic supports are important devices for supporting a work surface, and have an extremely important role in ensuring the safety of personnel and devices on the work surface. The existing hydraulic support discharges a row on the working surface to support the top plate of the working surface, and the goaf with the top plate continuously collapsed is arranged behind the hydraulic support. The hydraulic support is required to be lowered in height and separated from contact with the top plate in the forward moving process of alternate walking, and in addition, the hydraulic support is required to be fully contacted with the top plate, and a hydraulic support inlet and outlet valve of the hydraulic support is in a closed state. Because the floating liquid is incompressible, therefore, the floating liquid hydraulic pressure in the hydraulic prop changes synchronously along with the sinking of the top plate, and the sinking condition of the top plate can be accurately monitored through the floating liquid hydraulic pressure change, but the floating liquid hydraulic pressure sensor in the prior art detects the outlet hydraulic pressure of the emulsion pump and cannot detect the floating liquid hydraulic pressure change in the hydraulic prop under the bearing state. The invention fills the blank of the prior art, so that workers can know the sinking change of the top plate at any time through the hydraulic change of the floating liquid. By the design, the safety of equipment and personnel on a working face is effectively guaranteed.
As optimization, along the direction of the trend of the working surface, self-cutting eyesFirstly, acquiring the internal liquid pressure of a hydraulic upright post of a hydraulic support in the middle section of a working surface once by a downhole monitoring host every 10 meters to obtain a series of internal liquid pressure of the hydraulic upright post, namely N 1 、N 2 、N 3 … … the underground monitoring host is provided with a display screen, two-dimensional coordinates are displayed on the display screen, and the pressure of the liquid in the hydraulic upright column is N 1 、N 2 、N 3 Taking the acquisition order of 1, 2 and 3 … … as the ordinate, respectively displaying corresponding points on the two-dimensional coordinates, sequentially connecting the points to form a curve, simultaneously using a horizontal line to represent rated maximum working pressure in the two-dimensional coordinates,
if the curve is always below the transverse line representing the rated maximum working pressure, the curve is fluctuated smoothly, which indicates that the working face hydraulic support works normally, the curve is always in a low position and is fluctuated little, which indicates that the working face top plate is likely to be large-area and not collapsed, the top plate pre-blasting is needed,
if the curve suddenly rises, further judging whether the working surface is pushed to the top fault or not, if the working surface is just pushed to the top fault and the curve does not exceed the transverse line, continuing to push the working surface and further monitoring;
If the working surface is not at the fault of the top plate at this time, the curve is compared with the curve formed by pushing the adjacent mined working surface, if the trend of the curve and the trend of the curve are consistent, and the curve does not exceed the transverse line, the working surface is pushed continuously, and the working surface is monitored further,
if the working surface is not at the fault of the top plate at this time, the curve is compared with the curve formed by pushing the adjacent mined working surface, the trend of the curve is different, the curve is raised, the trend of the curve is over the transverse line, the pushing of the working surface is stopped immediately, the working personnel is evacuated, and after the expert analysis judges that the working surface is dangerous, the working personnel enters the working surface again for operation.
By the design, when the track roadway and the belt roadway are excavated, experienced coal mine staff can predict the sinking mode of the top plate in the working face advancing process according to the geological condition of the top plate, the progress of the sinking mode of the top plate in the working face advancing process can be obtained, and the hydraulic change curve of the floating liquid in the bearing hydraulic prop in the working face advancing process can be further obtained by the invention, so that the sinking change scale of the top plate in the working face advancing process can be further estimated, the geological condition of the top plate of the coal seam can be further mastered through curve comparison of two adjacent mining areas, and the mining safety is further ensured.
The intelligent fully-mechanized coal mining equipment integrates the temperature, vibration or outlet pressure and other parameters of each equipment, and calculates the health index H of the equipment 1 ，H 2 And H 3 As the monitoring basis of the underground monitoring host, the comprehensive mining equipment is more reasonable and comprehensive in monitoring, and is widely applicable to various large coal mines.
Drawings
The intelligent fully-mechanized mining equipment of the invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a hydraulic column of the intelligent fully-mechanized mining equipment and a partial structure of a hydraulic sensor on the hydraulic column;
fig. 2 is a graph of the underground monitoring host of the intelligent fully-mechanized mining equipment, which is displayed by a display screen.
In the figure: the hydraulic stand column comprises a hydraulic stand column 1, a connector tube 2, a shell 3, a rechargeable storage battery 4, a piezoelectric ceramic plate 5, a radio transmitting integrated circuit 6, a pressure measuring switch 7, a signal amplifying module 61, a coding module 62, a radio transmitting module 63, a partition plate 8, an insulating layer 9, an electrode plate 10, a lead 11, an explosion-proof charging interface 12, a corrugated sealing disk 13, a copper sealing pad 14, an annular round table 15, a sliding shoe 16, a top plate 17 and a transverse line L for representing the rated maximum working pressure of the hydraulic stand column.
The solid line in fig. 2 is a curve formed by emulsion hydraulic pressure of a hydraulic prop of the fully mechanized mining face of the current mining area; the broken line is a curve formed by emulsion liquid pressure of hydraulic supports of the fully mechanized mining face of the adjacent last mining area.
Detailed Description
Embodiment one: the intelligent fully-mechanized coal mining equipment comprises intelligent fully-mechanized coal mining equipment, a working face hydraulic support, a coal mining machine, a scraper conveyor, a reversed loader, a belt conveyor, a fan, a pump station and an underground monitoring host, wherein the working face hydraulic support comprises an intermediate supportAnd the end supports at two ends of the middle support are respectively provided with a hydraulic upright post 1 and a traction cylinder, and the coal mining machine, the scraper conveyor, the reversed loader, the belt conveyor, the fan and the pump station are respectively provided with a driving motor, and the hydraulic upright post traction machine is characterized in that: the underground monitoring host is provided with a mining fiber grating demodulator, the driving motors of the coal mining machine, the scraper conveyor, the reversed loader, the belt conveyor, the fan and the pump station are respectively provided with a mining fiber grating temperature sensor and a mining fiber grating vibration sensor, wherein the mining fiber grating temperature sensor is arranged at the output shaft of the corresponding driving motor, the mining fiber grating vibration sensor is arranged on the shell of the corresponding driving motor, the fan and the pump station are respectively provided with a mining fiber grating pressure sensor, the mining fiber grating pressure sensors are respectively arranged on the outlet pipe of the fan and the outlet pipe of the emulsion, and the underground monitoring host calculates the health index H of the driving motor of the scraper conveyor, the reversed loader, the belt conveyor and the fan according to the following formula 1
Wherein T is the temperature of the corresponding driving motor, T min T is the minimum value of the temperature of the normal operation of the corresponding driving motor max For the maximum value of the temperature of the normal operation of the corresponding driving motor, Z is the current vibration value of the corresponding driving motor, Z min To the vibration minimum value of the normal operation of the corresponding driving motor, Z max For the maximum vibration value of the normal operation of the corresponding driving motor, when the corresponding driving motor is started or T is less than T min Or Z < Z min When the motor is stopped, the temperature value and the vibration value before the corresponding driving motor stops last time are selected for t and z,
if H 1 The method comprises the steps that (1) the current temperature and the current vibration of the corresponding driving motor are equal to the minimum temperature and the minimum vibration value of the normal operation of the corresponding driving motor, the corresponding driving motor is in an ideal working state completely, the underground monitoring host computer displays that the working state of the corresponding driving motor is excellent, and no alarm is sent;
if 0 is less than H 1 < 1, then explainThe current temperature of the corresponding driving motor is between the minimum normal operation temperature and the maximum normal operation temperature of the corresponding driving motor, the current vibration of the corresponding driving motor is between the minimum normal operation vibration value and the maximum normal operation vibration value of the corresponding driving motor, the corresponding driving motor is in a normal operation state, the underground monitoring host computer displays that the corresponding driving motor works normally, no alarm is sent, and the monitoring is continued;
If H 1 If the current temperature of the corresponding driving motor is less than or equal to 0, indicating that the current vibration of the corresponding driving motor is at the maximum temperature of the normal operation of the corresponding driving motor, wherein the current vibration of the corresponding driving motor is at the maximum vibration value of the normal operation of the corresponding driving motor, and the corresponding driving motor is in a dangerous working state, the underground monitoring host displays that the corresponding driving motor works abnormally, does not send an alarm, informs a worker to reduce the working load of the corresponding driving motor as soon as possible, and arranges maintenance as soon as possible;
the downhole monitoring host calculates the health index H of the driving motor of the coal mining machine according to the following formula 2
Wherein I is the current working current of the driving motor of the coal mining machine, I min For the minimum value of the working current of the normal operation of the driving motor of the coal mining machine, I max For the maximum value of the working current of the normal operation of the driving motor of the coal mining machine, when the driving motor of the coal mining machine is started, or I is less than I min When the coal mining machine is started, i is the working current value before the driving motor of the coal mining machine stops last time,
if H 2 The method comprises the steps that (1) the current working current of a coal cutter driving motor is equal to the minimum working current of the normal operation of the coal cutter driving motor, the corresponding driving motor is in an ideal working state completely, the underground monitoring host computer displays that the coal cutter driving motor is in the ideal working state completely, and no alarm is sent out;
If 0.7 < H 2 If the current of the driving motor of the coal mining machine is less than 1, the current of the driving motor of the coal mining machine is normalThe underground monitoring host displays that the coal mining machine driving motor works excellently without giving any alarm and continuously monitors the coal mining machine driving motor under the good working state of the coal mining machine driving motor;
if 0.5 is less than H 2 If the current working current of the coal cutter driving motor is less than or equal to 0.7, indicating that the current working current of the coal cutter driving motor is between the minimum working current of the normal operation of the coal cutter driving motor and the maximum working current of the normal operation of the coal cutter driving motor, and displaying that the coal cutter driving motor works normally by the underground monitoring host without giving any alarm and continuing monitoring;
if 0 is less than H 2 If the current working current of the coal cutter driving motor is less than or equal to 0.5, the current working current of the coal cutter driving motor is between the minimum working current of the normal operation of the coal cutter driving motor and the maximum working current of the normal operation, but is closer to the maximum working current of the normal operation of the corresponding coal cutter driving motor, the coal cutter driving motor is in a bad working state, the underground monitoring host displays that the coal cutter driving motor works abnormally, an alarm is sent, and a worker is informed to reduce the working load of the corresponding driving motor as soon as possible, and overhaul is arranged as soon as possible;
If H 2 If the current working current of the driving motor of the coal mining machine is less than or equal to 0, indicating that the current working current of the driving motor of the coal mining machine is greater than the maximum working current of the driving motor of the coal mining machine in normal operation, displaying that the driving motor of the coal mining machine works abnormally by a downhole monitoring host, giving an alarm, and notifying workers of stopping and overhauling as soon as possible;
the health index H of the emulsion pump is calculated by the underground monitoring host according to the following formula 3
Wherein T is the temperature of the corresponding driving motor, T min T is the minimum value of the temperature of the normal operation of the corresponding driving motor max Maximum temperature for normal operation of corresponding driving motorThe value Z is the current vibration value of the corresponding driving motor, Z min To the vibration minimum value of the normal operation of the corresponding driving motor, Z max For the maximum vibration value of the normal operation of the corresponding driving motor, Y is the outlet pressure of the current emulsion pump, Y min For the minimum value of the normal operation outlet pressure of the emulsion pump, Y max For maximum value of outlet pressure of emulsion pump in normal operation, when the emulsion pump is started or T is less than T min Or Z < Z min Or Y < Y min When the emulsion pump is stopped, the temperature value, the vibration value and the outlet pressure value before the last emulsion pump is stopped are selected as t, z and y,
if H 3 The method comprises the steps that (1) the current temperature and the current vibration of a corresponding emulsion pump are equal to the minimum temperature and the minimum vibration value of the normal operation of the emulsion pump, the current outlet pressure of the emulsion pump is equal to the maximum outlet pressure value of the normal operation of the emulsion pump, the corresponding driving motor is in an ideal working state completely, the underground monitoring host computer displays that the emulsion pump works well, and no alarm is sent;
If 0 is less than H 3 If the current temperature of the emulsion pump is less than 1, the current vibration of the emulsion pump is between the minimum normal operation temperature and the maximum normal operation temperature of the corresponding driving motor, the current vibration of the emulsion pump is between the minimum normal operation vibration value and the maximum normal operation vibration value of the emulsion pump, the current outlet pressure of the emulsion pump is between the minimum outlet pressure value and the maximum outlet pressure value of the emulsion pump, the emulsion pump is in the normal operation state, the underground monitoring host computer displays that the emulsion pump works normally without giving any alarm, and the monitoring is continued;
if H 3 And if the temperature of the emulsion pump is less than or equal to 0, indicating that the current temperature of the emulsion pump is greater than or equal to the maximum temperature of the emulsion pump in normal operation and/or the current vibration of the emulsion pump is greater than or equal to the maximum vibration value of the emulsion pump in normal operation and/or the current outlet pressure of the emulsion pump is less than or equal to the minimum outlet pressure value of the emulsion pump in normal operation, displaying abnormal operation of the emulsion pump by a downhole monitoring host under dangerous working state, giving an alarm, and notifying staff to arrange maintenance as soon as possible.
Note that: the emulsion pump outlet pressure is herein actually the emulsion pump outlet pressure, which is known as the industry practice.
The system can be further additionally provided with a communication substation, a video monitoring network, a ground monitoring computer, a big data and data mining server, a virtual hospital for remote diagnosis of equipment faults, a comprehensive mining face equipment parameter line-crossing early warning mobile phone app, a printer and the like.
The sensor respectively transmits the acquired equipment parameters into a belt conveyor monitoring and communication substation, a reversed loader monitoring and communication substation, a scraper monitoring and communication substation, a mobile transformer monitoring and communication substation and an emulsion pump monitoring and communication substation, and the acquired equipment parameters are displayed in real time, and each substation is provided with 8 paths of RS-485 communication ports and an Ethernet communication port, so that the equipment parameters can be communicated with underground equipment and seamlessly linked, and underground staff can know the running condition of the equipment in time. Each base station utilizes underground optical fibers to gather information to an underground monitoring host, and then the monitoring host transmits monitoring information to an underground monitoring center through a ground ring network.
The video monitoring network for the fully mechanized mining face mainly comprises main parts of hydraulic support video monitoring, coal mining machine video monitoring, other fixed equipment such as a crusher, a scraper, a reversed loader, a belt conveyor, an emulsion pump and the like. The coal mining machine and the hydraulic support are always in a motion state, so that the fact that the wireless cameras are required to be used for video monitoring of the coal mining machine and the hydraulic support is determined, 1 intrinsic safety type wireless cameras are respectively installed on each 4 hydraulic supports in the vertical direction and the horizontal direction of a working face and are installed on a top beam of the support, the cameras in the horizontal direction are used for displaying the support, and the cameras in the vertical direction are used for displaying the coal mining machine and face the coal wall. The crusher, the loader, the scraper, the belt conveyor, the emulsion pump and the like belong to fixed-position equipment, and a cradle head camera is arranged at a key position to realize dead angle-free monitoring of all the equipment. Every 4 wireless cameras are connected to a wireless communication base station with a wireless receiver through a wireless network. And after each holder camera and each wireless communication base station are accessed into the switch through optical cables, one path of video is uploaded to an underground monitoring center through a ground ring network, and the other path of video is accessed into the underground video monitoring center.
The on-well monitoring center mainly comprises a ground monitoring computer, a big data and data mining server, a virtual hospital for remote diagnosis of equipment faults, a comprehensive mining face equipment parameter line-crossing early warning mobile phone app and a printer. The underground equipment parameters and the video monitoring information are transmitted to the ground monitoring host through the ground ring network, the ground monitoring host displays and stores the real-time information into the database, the big data server analyzes and pre-warns fault information, and then the fault information is transmitted to the virtual hospital server and the mobile phone APP server, and the fault information is printed through the printer.
On one hand, the virtual hospital network server of the equipment fault remote diagnosis virtual hospital calls a diagnosis tool to diagnose through analyzing an HTML form of the information and stores the diagnosed information into a related database, and on the other hand, the equipment fault remote diagnosis virtual hospital network server can acquire maintenance services of related maintenance specialists by establishing contact with the related maintenance specialists. The maintenance process includes device testing, diagnosis, maintenance, document creation, etc. Involving maintenance members, specialists, operators, manufacturers and researchers, etc.
The big data server performs real-time on-line monitoring and data fusion mining according to fault characteristic quantities such as equipment temperature, vibration and the like, extracts characteristic data reflecting the running state of a unit, establishes a self-adaptive elastic network logistic regression model, performs comprehensive analysis by combining field expert knowledge and unit history fault files, performs fault prediction on each equipment by using good variable selection capability and prediction capability of a logistic regression algorithm, thereby determining the position, reason, type and property of possible faults, and providing reference suggestions for maintenance.
And establishing a device self-adaptive elastic network logistic regression model on the basis of the elastic network. The model not only inherits the sparsity characteristic of the elastic net, but also has more reasonable group selection capability of related characteristics. Meanwhile, the self-adaption has Oracle property, which essentially ensures that the model is a better optimization model. The self-adaptive elastic network is based on an elastic network regularization method, different weights are assigned to different variable coefficients in an L1 regularization term, and the non-zero coefficients of the variables are not given the same weight as in the L1 regularization in the elastic network. Thus, it can be seen as a combination of weighted L1 regularization and L2 regularization. The adaptive elastic network can be respectively assigned with different weights according to the sizes of variable coefficients, and the variable with larger coefficient is assigned with smaller weight, while the variable with smaller coefficient is assigned with larger weight, so that important variables are reserved, and unimportant variables are removed. The elastic net is a combination of L1 regularization and L2 regularization, and its expression is as follows:
the self-adaptive elastic net weights based on the L1 regularization term in the above formula to obtain the following regularization
Calculating an elastic network estimated value:
the adaptive weight vector is then constructed as follows:
the estimated value under the adaptive elastic network logistic regression model can be obtained:
for the traditional logistic regression model:
taking the first and second derivatives of L (β) with respect to (β) yields:
let beta old And beta new Representing the current and new estimates of β, respectively, then the following equation is followed:
it can be seen that each Newton-Raphson iteration is effectively a solution to a weighted least squares problem, which is of the form:
β new ＝argmin(z-XB) T M(z-Xβ)
according to the solving process of the traditional logistic regression, the iterative form of the adaptive elastic network logistic regression model can be obtained by only deforming the adaptive elastic network logistic regression model:
slightly deforming the mixture to obtain the following form:
the idea of the coordinate descent method is that it implements one outer loop by optimizing each one-dimensional feature (coordinate) of the solution vector one by one. In the internal circulation, when a certain coordinate is optimized, the rest s-1 dimensional coordinates of the fixed beta are not moved, and a series of single-variable sub-problems, namely extremum problems of a unitary function are solved each time, are solved for the dimensional coordinates (which can be set as the j-th dimension). This series of unary functions can be expressed as:
When k=0, for f 0 (β 0 ) Deriving and making its derivative equal to 0 to obtain f 0 (β 0 ) Is a solution to the optimization of (3). I.e.
When k is not equal to 0, f is due to the inclusion of the variable to be optimized in the regularization term 0 (β 0 ) The situation of (2) becomes more complex than the price, and in this case, f is required 0 (β 0 ) And (3) finishing is carried out, so that the calculation is convenient.
The optimal solution is obtained through calculation:
wherein the method comprises the steps of
The mobile phone app client is networked with a monitoring host of a monitoring room through the cloud server, and the operation parameters of the fully-mechanized mining face equipment are uploaded to the mobile phone client, so that the operation conditions of the equipment which you want to see underground can be checked at any time and any place as long as the mobile phone and the monitoring host are networked at the same time. When some parameters exceed the set values, an alarm pushing function is provided to prompt the fault point of the equipment operation.
As shown in fig. 1, the root of the cylinder body of each hydraulic upright post 1 is provided with a connector pipe 2, the connector pipe 2 is communicated with the inner cavity of the cylinder body, and a hydraulic sensor is arranged on the connector pipe 2. The hydraulic sensor comprises a shell 3, a chargeable storage battery 4, a piezoelectric ceramic sheet 5, a radio emission integrated circuit 6 and a pressure measuring switch 7, wherein the components are connected into a controllable loop, the radio emission integrated circuit 6 comprises a signal amplifying module 61, a coding module 62 and a radio emission module 63, and when the hydraulic support of each working face moves, the pressure measuring switch 7 cuts off the power supply of the radio emission integrated circuit, and all hydraulic upright posts jointly set a rated maximum working pressure.
The casing 3 is the cylinder, the casing 3 middle section is equipped with baffle 8, this baffle 8 divide into outer room and inner room with the casing 3, piezoceramics piece 5 installs in the inner room, chargeable call 4 and radio emission integrated circuit 6 are installed in the outer room, piezoceramics piece 5 is the disc, the parcel has insulating layer 9 on its outer circumference, its upper and lower surface is equipped with electrode slice 10 respectively, above-mentioned electrode slice 10 links to each other with the input of radio emission integrated circuit's signal amplification module 61 through lead 11, chargeable call 4 is radio emission integrated circuit power supply, be equipped with explosion-proof interface 12 on the casing 3, explosion-proof interface 12 meets with chargeable call 4, piezoceramics piece 5 lower surface still is equipped with a ripple sealing disk 13, ripple sealing disk 13 outer fringe is equipped with copper sealing pad 14, the inner room lower extreme is equipped with the screw thread through-hole, screw thread through-hole upper end is equipped with annular round platform 15, interface pipe 2 is equipped with corresponding external screw thread, the casing 3 is installed on above-mentioned interface pipe 2 through its screw thread through-hole, and ripple sealing disk 13 outer fringe and copper sealing pad 14 are held between interface pipe 2 and annular round platform 15.
The underground monitoring host is also provided with a mining fiber bragg grating demodulator and a radio receiving integrated circuit, and the radio receiving integrated circuit comprises a radio receiving module and a decoding module, which are not shown in the drawing.
The hydraulic sensor is provided with a special code, all the hydraulic upright posts are synchronously closed in the state of supporting the top plate, each radio emission integrated circuit emits the collected floating liquid hydraulic signal to the underground monitoring host machine every 10 seconds, and simultaneously emits the code of the corresponding hydraulic sensor, the underground monitoring host machine compares the collected liquid pressure inside the hydraulic upright posts sent by the hydraulic sensors of each hydraulic upright post with the rated maximum working pressure,
if the pressure of the liquid in the hydraulic upright posts sent by the hydraulic sensors of each hydraulic upright post is less than or equal to the rated maximum working pressure, all the hydraulic upright posts are in a normal working state, the underground monitoring host computer displays that each hydraulic upright post works well, does not send any alarm, and continues to monitor;
if the pressure of the liquid in the hydraulic upright post sent by the hydraulic sensors of part of the hydraulic upright posts is larger than the rated maximum working pressure, calculating arithmetic mean of the pressure of the liquid in the hydraulic upright posts sent by the hydraulic sensors of all the hydraulic upright posts by a downhole monitoring host machine, comparing the arithmetic mean with the rated maximum working pressure,
if the arithmetic mean is less than or equal to the rated maximum working pressure, each hydraulic upright post is in an adjustable working state, the height of the hydraulic upright post with the highest internal liquid pressure is reduced manually or through an underground monitoring host, the height is reduced by 2-3 cm each time, the height of the hydraulic upright post with the lowest internal liquid pressure is increased if necessary, the height is increased by 1 cm each time, until the internal liquid pressure of all the hydraulic upright posts is less than or equal to the rated maximum working pressure,
If the arithmetic average is larger than the rated maximum working pressure, each hydraulic upright post is in a dangerous working state, the height of the hydraulic upright post with the highest internal liquid pressure is reduced by the underground monitoring host, the height is reduced by 2-3 cm each time, the height of the hydraulic upright post with the lowest internal liquid pressure is increased if necessary, the height is increased by 1 cm each time until the internal liquid pressure of all the hydraulic upright posts is smaller than or equal to the rated maximum working pressure,
if the internal liquid pressure of the hydraulic upright posts sent by the hydraulic sensors of all the hydraulic upright posts is greater than the rated maximum working pressure, each hydraulic upright post is in a high-risk working state, the underground monitoring host machine gives an alarm to inform personnel on the working face of evacuation, meanwhile, the height of the hydraulic upright post with the highest internal liquid pressure is reduced by the underground monitoring host machine, the height is reduced by 2-3 cm each time, until the internal liquid pressure of all the hydraulic upright posts is less than or equal to the rated maximum working pressure, and after the top plate of the working face is stable, the underground monitoring host machine informs the personnel to enter the working face for working.
The underground monitoring host is provided with a display screen, and the underground monitoring host collects the liquid pressure inside the hydraulic upright post of the middle section hydraulic support of the working surface once every 10 meters from the beginning of cutting along the trend direction of the working surface to obtain a series of liquid pressure inside the hydraulic upright post, namely N 1 、N 2 、N 3 … …, displaying two-dimensional coordinates on a display screen, and displaying the internal liquid pressure of the hydraulic upright column-N 1 、N 2 、N 3 On the ordinate, the acquisition sequences 1, 2 and 3 … … are taken as the abscissa, corresponding points are respectively displayed on the two-dimensional coordinates, the points are sequentially connected to form a curve, and meanwhile, the rated maximum working pressure is represented by a horizontal line L in the two-dimensional coordinates, as shown in fig. 2.
If the curve is always below the transverse line representing the rated maximum working pressure, the curve is fluctuated smoothly, which indicates that the working face hydraulic support works normally, the curve is always in a low position and is fluctuated little, which indicates that the working face top plate is likely to be large-area and not collapsed, the top plate pre-blasting is needed,
if the curve suddenly rises, further judging whether the working surface is pushed to the top fault or not, if the working surface is just pushed to the top fault and the curve does not exceed the transverse line, continuing to push the working surface and further monitoring;
if the working surface is not at the fault of the top plate at this time, the curve is compared with the curve formed by pushing the adjacent mined working surface, if the trend of the curve and the trend of the curve are consistent, and the curve does not exceed the transverse line, the working surface is pushed continuously, and the working surface is monitored further,
If the working surface is not at the fault of the top plate at this time, the curve is compared with the curve formed by pushing the adjacent mined working surface, the trend of the curve is different, the curve is raised, the trend of the curve is over the transverse line, the pushing of the working surface is stopped immediately, the working personnel is evacuated, and after the expert analysis judges that the working surface is dangerous, the working personnel enters the working surface again for operation.
1. Working face roof disaster prediction method
1. The invention utilizes a mining intrinsic safety type wireless roof pressure sensor to collect working resistance data of a bracket and a hydraulic single column, and adopts a deep learning algorithm based on a convolutional neural network to forecast and pre-warn a working face roof disaster.
2. Description of the invention
Support pressure sensor: the sensors are installed in a distributed mode, and work resistance of the support and the single column is monitored. The sampling frequency is 50Hz, and the signal duration is 60s.
And (3) data processing: including conventional data processing such as filtering and fourier transforms.
Neural network model: establishing a multi-layer convolutional neural network model, wherein C 1 ,C 2 ,C 4 ,C 5 Is a convolution layer, S 3 ,S 6 For downsampling layer, FC 1 ,FC 2 For the fully connected layer, softmax is the classification layer.
Prediction result: and outputting an alarm when the sinking amount of the top plate exceeds a threshold value.
3. The implementation method of the early warning method comprises the following specific steps:
1) Collecting pressure signals and uploading the pressure signals to a database;
2) And the data processing comprises fitting breakpoint data and marking abnormal data.
3) Converting the pressure time domain signal into a video image through Fourier transform;
4) And (3) graphic processing, namely deleting non-characteristic parts (namely blank positions, coordinates and the like) of the time-frequency diagram, and compressing the picture.
5) And establishing a network, initializing network parameters, and determining the network parameters such as the learning rate, the iteration times, the step length and the like.
6) And (3) network training, namely inputting the sample into a network model, obtaining an error between the network output and an expected target through forward propagation, and knowing network convergence through backward propagation and weight modification.
7) And inputting test data and outputting a roof disaster early warning value.
2. Working face equipment fault diagnosis and prediction system based on big data
1. According to the invention, a big data analysis and data mining technology is adopted, a fault type cluster analysis (K-means algorithm) is adopted, an evaluation model based on a Convolutional Neural Network (CNN) method is established, and intelligent monitoring and equipment diagnosis and fault early warning are carried out on the running state of electromechanical equipment of a fully mechanized coal mining face.
2. Electromechanical device data: the underground data is acquired through the hardware sensor original, and the underground data mainly comprises operation voltage, current, vibration in the operation process and temperature data, and the operation voltage, the current and the vibration in the operation process are uploaded into a database.
Cluster analysis sub-model: and clustering analysis models for fault types of equipment such as a coal mining machine, a conveyor, a crusher, a reversed loader and the like. And (3) gathering samples with close relation of operation data of each electromechanical device into one type, calculating various center points, and removing samples with distant relation to obtain a clustering sub-model of each electromechanical device.
Convolutional neural network submodel: and on the basis of the output result of the cluster analysis submodel, performing deep learning based on a convolutional neural network, respectively establishing a fault diagnosis submodel of equipment such as a coal mining machine, a conveyor, a crusher, a reversed loader and the like based on the convolutional neural network, and outputting a diagnosis result.
Convolutional neural network synthesis model: and taking the data of each cluster analysis sub-model as input, establishing a network model with proper depth for training, finally obtaining the data for evaluating the performance of the electromechanical equipment, and outputting the evaluation result of the equipment fault condition.
3. Reference table for evaluating device performance
| Device health index | State description |
| 0-0.2 | Serious state, serious exceeding standard limit, need to stop as soon as possible for maintenance |
| 0.2-0.4 | In abnormal state, the state quantity is greatly changed and approaches to the standard value, and shutdown maintenance is timely arranged |
| 0.4-0.7 | Note that the state, state quantity change trend is developed to the standard value, and the operation clinical control is enhanced |
| 0.7-1.0 | Normal state, state quantity is in specified value, regular maintenance |
Claims (1)
1. The utility model provides an intelligent comprehensive mining equipment, includes working face hydraulic support, coal-winning machine, scraper conveyor, transfer machine, band conveyer, fan, pump station and monitoring host computer in pit, and working face hydraulic support includes the end support at middle support and middle support both ends, is equipped with hydraulic column and traction cylinder on middle support and the end support respectively, and coal-winning machine, scraper conveyor, transfer machine, band conveyer, fan, pump station are furnished with driving motor, its characterized in that respectively: the underground monitoring host is provided with a mining fiber grating demodulator, the driving motors of the coal mining machine, the scraper conveyor, the reversed loader, the belt conveyor, the fan and the pump station are respectively provided with a mining fiber grating temperature sensor and a mining fiber grating vibration sensor, wherein the mining fiber grating temperature sensor is arranged at the output shaft of the corresponding driving motor, the mining fiber grating vibration sensor is arranged on the shell of the corresponding driving motor, the fan and the pump station are respectively provided with a mining fiber grating pressure sensor, the mining fiber grating pressure sensors are respectively arranged on the outlet pipe of the fan and the outlet pipe of the emulsion, and the underground monitoring host calculates healthy fingers of the driving motors of the scraper conveyor, the reversed loader, the belt conveyor and the fan according to the following formula Number H 1
Wherein T is the temperature of the corresponding driving motor, T min T is the minimum value of the temperature of the normal operation of the corresponding driving motor max For the maximum value of the temperature of the normal operation of the corresponding driving motor, Z is the current vibration value of the corresponding driving motor, Z min To the vibration minimum value of the normal operation of the corresponding driving motor, Z max For the maximum vibration value of the normal operation of the corresponding driving motor, when the corresponding driving motor is started or T is less than T min Or Z < Z min When the motor is stopped, the temperature value and the vibration value before the corresponding driving motor stops last time are selected for t and z,
if H 1 The method comprises the steps that (1) the current temperature and the current vibration of the corresponding driving motor are equal to the minimum temperature and the minimum vibration value of the normal operation of the corresponding driving motor, the corresponding driving motor is in an ideal working state completely, the underground monitoring host computer displays that the working state of the corresponding driving motor is excellent, and no alarm is sent;
if 0 is less than H 1 If the current temperature of the corresponding driving motor is less than 1, the current vibration of the corresponding driving motor is between the minimum normal operation temperature and the maximum normal operation temperature of the corresponding driving motor, the current vibration of the corresponding driving motor is between the minimum normal operation vibration value and the maximum normal operation vibration value of the corresponding driving motor, the corresponding driving motor is in a normal working state, and the underground monitoring host computer displays that the corresponding driving motor works normally without giving any alarm and continues monitoring;
If H 1 If the current temperature of the corresponding driving motor is less than or equal to 0, indicating that the current vibration of the corresponding driving motor is at the maximum temperature of the normal operation of the corresponding driving motor, wherein the current vibration of the corresponding driving motor is at the maximum vibration value of the normal operation of the corresponding driving motor, and the corresponding driving motor is in a dangerous working state, the underground monitoring host displays that the corresponding driving motor works abnormally, does not send an alarm, informs a worker to reduce the working load of the corresponding driving motor as soon as possible, and arranges maintenance as soon as possible;
the downhole monitoring host calculates the health index H of the driving motor of the coal mining machine according to the following formula 2
Wherein I is the current working current of the driving motor of the coal mining machine, I min For the minimum value of the working current of the normal operation of the driving motor of the coal mining machine, I max For the maximum value of the working current of the normal operation of the driving motor of the coal mining machine, when the driving motor of the coal mining machine is started, or I is less than I min When the coal mining machine is started, i is the working current value before the driving motor of the coal mining machine stops last time,
if H 2 The method comprises the steps that (1) the current working current of a coal cutter driving motor is equal to the minimum working current of the normal operation of the coal cutter driving motor, the corresponding driving motor is in an ideal working state completely, the underground monitoring host computer displays that the coal cutter driving motor is in the ideal working state completely, and no alarm is sent out;
If 0.7 < H 2 If the current working current of the coal cutter driving motor is less than 1, the current working current of the coal cutter driving motor is between the minimum working current of the normal operation of the coal cutter driving motor and the maximum working current of the normal operation, and is closer to the minimum working current of the normal operation of the corresponding coal cutter driving motor, and the underground monitoring host computer displays that the coal cutter driving motor works excellently without giving any alarm and continues monitoring when the coal cutter driving motor is in a good working state;
if 0.5 is less than H 2 If the current working current of the coal cutter driving motor is less than or equal to 0.7, indicating that the current working current of the coal cutter driving motor is between the minimum working current of the normal operation of the coal cutter driving motor and the maximum working current of the normal operation of the coal cutter driving motor, and displaying that the coal cutter driving motor works normally by the underground monitoring host without giving any alarm and continuing monitoring;
if 0 is less than H 2 Less than or equal to 0.5, indicating that the current working current of the driving motor of the coal mining machine is in the minimum working current and the normal working current of the normal operation of the driving motor of the coal mining machineThe working current is between the maximum working currents, but is closer to the normal working current of the corresponding driving motor of the coal mining machine, the driving motor of the coal mining machine is in a bad working state, the underground monitoring host displays that the driving motor of the coal mining machine works abnormally, an alarm is sent, and workers are informed of reducing the working load of the corresponding driving motor as soon as possible and arranging maintenance as soon as possible;
If H 2 If the current working current of the driving motor of the coal mining machine is less than or equal to 0, indicating that the current working current of the driving motor of the coal mining machine is greater than the maximum working current of the driving motor of the coal mining machine in normal operation, displaying that the driving motor of the coal mining machine works abnormally by a downhole monitoring host, giving an alarm, and notifying workers of stopping and overhauling as soon as possible;
the health index H of the emulsion pump is calculated by the underground monitoring host according to the following formula 3
Wherein T is the temperature of the corresponding driving motor, T min T is the minimum value of the temperature of the normal operation of the corresponding driving motor max For the maximum value of the temperature of the normal operation of the corresponding driving motor, Z is the current vibration value of the corresponding driving motor, Z min To the vibration minimum value of the normal operation of the corresponding driving motor, Z max For the maximum vibration value of the normal operation of the corresponding driving motor, Y is the outlet pressure of the current emulsion pump, Y min For the minimum value of the normal operation outlet pressure of the emulsion pump, Y max For maximum value of outlet pressure of emulsion pump in normal operation, when the emulsion pump is started or T is less than T min Or Z < Z min Or Y < Y min When the emulsion pump is stopped, the temperature value, the vibration value and the outlet pressure value before the last emulsion pump is stopped are selected as t, z and y,
if H 3 =1, the current temperature and current vibration of the corresponding emulsion pump are equal to the minimum temperature and the minimum vibration value of the normal operation of the emulsion pump, the current outlet pressure of the emulsion pump is equal to the maximum outlet pressure value of the normal operation of the emulsion pump, and the corresponding The driving motor is completely in an ideal working state, the underground monitoring host computer displays that the emulsion pump works well and does not send any alarm;
if 0 is less than H 3 If the current temperature of the emulsion pump is less than 1, the current vibration of the emulsion pump is between the minimum normal operation temperature and the maximum normal operation temperature of the corresponding driving motor, the current vibration of the emulsion pump is between the minimum normal operation vibration value and the maximum normal operation vibration value of the emulsion pump, the current outlet pressure of the emulsion pump is between the minimum outlet pressure value and the maximum outlet pressure value of the emulsion pump, the emulsion pump is in the normal operation state, the underground monitoring host computer displays that the emulsion pump works normally without giving any alarm, and the monitoring is continued;
if H 3 And if the temperature of the emulsion pump is less than or equal to 0, indicating that the current temperature of the emulsion pump is greater than or equal to the maximum temperature of the emulsion pump in normal operation and/or the current vibration of the emulsion pump is greater than or equal to the maximum vibration value of the emulsion pump in normal operation and/or the current outlet pressure of the emulsion pump is less than or equal to the minimum outlet pressure value of the emulsion pump in normal operation, displaying abnormal operation of the emulsion pump by a downhole monitoring host under dangerous working state, giving an alarm, and notifying staff to arrange maintenance as soon as possible.
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