Control method of laser treatment of rock material of variable rigidity and system for its implementation

FIELD: mining.

SUBSTANCE: control method comprises control of the intensity of the high temperature thermodynamic laser irradiation to the area of the laser radiation, regulation of change of the wavefront of the laser radiation, control of milling cutting force P, the parameters of the rock material rigidity f through the registration sensor of the rock material rigidity, mounted on the frame of fibre optic laser emitter, the speed control of movement of the surface miner Vki, introduction to program of algorithm of calculation of the wavefront of laser radiation power W, depending on the parameters of rock material rigidity f and the approach increment of fibre optic emitters li based on the equation.

EFFECT: invention enables to improve the efficiency of management of technological preparation for excavation of rock material and provides remote control of destruction of rock material.

2 cl, 10 dwg

 

The invention relates to the mining industry and can be used for process control of laser irradiation on the rock of the variable fortress in the preparation of rock to nonexplosive a loss of strength for the subsequent layer-by-layer band-pass milling and extraction career harvesters.

Known methods of preparing rocks for extraction by pre-detonation of the array, including the way with cyclical-and-continuous testing of rock materials, including drilling on drilling unit vertical or inclined wells, recharge wells and blasting them under the shelter on the preparation unit to rock excavation, the subsequent seizure blasted rock and loading it on the AFC through the mobile crushing unit excavation unit [1, 2].

These methods require significant organizational and preparatory work according to common safety regulations for blasting, not exclude the influence of seismic waves, hitting the pieces of the shattered rock mass elements excavation equipment, vehicles and staff, as well as cause significant harm to the environment.

Known methods of preparation of the array to the notch at the expense of weakening its under the action of surface-active substances (surfactants). Method [3] provides a softening of the priori array using a surfactant solution, pour into wells formed in a mountain array. Well do different depths and placed in a checkerboard pattern, and the surfactant solution is poured into the volume and concentration according to the given formulas. Method of mining ledges of rocks [4] provides performance grid blastholes with increased distance between them and the cementing of wells. Filling the wells are filled with solutions of surfactants and after curing of the newly topped up with solutions or water. Then produce a blasting explosive charge, excavation and loading and transport.

Methods using surfactants considerable amount of work and environmental pollution.

Known methods using laser energy for drilling in loose rocks or creation of punching holes in the casing, the cement stone and rock [5, 6]. The laser perforator of the hydraulic slit, designed to create punching holes in the casing, the cement stone and rock, includes a laser device with the possibility of longitudinal movement along the column during the implementation of the perforation at a constant power supply, equipped with a laser Windows in the lower part, on which are located the hydro with the guide centralizers. The invention provides a drilling p is astou sequential execution of the cutting gaps with a laser and hydrodynamic erosion of rocks [6].

The disadvantage of this device that provides cutting slits, is the impossibility of combining the processes of cutting gaps and immediate destruction of the breed that technologically reduces the productivity of the production process.

Known adaptive control drive of the milling machine, which is equipped with a system to promote the construction of the machine and measure the reaction forces applied by the ground surface to the milling drum, and in response to the measured data changes of opposing forces adjusts the driving power supplied to the motor drive of the machine, or slows down the speed of lowering of the rotating milling drum. Early and rapid identification of such changes of opposing forces allows the control system to help prevent phenomena roll forward or backward, respectively, construction machinery [7].

The method has functional limitations and are not able to perform the necessary tasks.

The closest in technical essence is a method of laser processing and device for its implementation, in which between the workpiece surface and the electrode under positive potential, initiate an electrical discharge and plasma parameters of the torch over the treatment area to control the intensity of the heat in the actions in the area of laser irradiation and arc discharge, the wave front of the laser radiation is deformed by changing the angle of divergence using adaptive element. Device for laser processing, containing a laser focusing system, the control unit of the laser intensity, coupled with laser, nonconsumable electrode connected to a current source, equipped with a microprocessor, an adaptive element mounted on the optical axis of the laser before focusing system, with the control unit, the registration unit and analysis of the energy distribution in the treatment area, the control unit electric discharge interconnected with the microprocessor with the last two blocks and focusing system [8].

The method improves the quality of processing by stabilizing the deposition of energy in the treatment area, but it is not adapted to the problem of efficient processing of the surface of considerable size and formation in the surface layer of the processed array of zones of overlap of the laser slit, providing a high stress concentration, alternating loads and deformation in the laser processing large surface.

The technical result consists in increasing the efficiency of management of technological preparation for rock excavation by regulating the energy input wavefront of the laser radiation to the treatment area and formulate the Oia in the surface layer of the processed array of evenly spaced zones of overlap of the laser slits possible without gaps when the change rate of advance of the harvester in the case of areas of high or reduced strength in layer-by-layer band-pass milling rock quarry machines.

The technical result is achieved in that in the method of controlling a laser processing rock variable fortress, including monitoring the intensity of the high-temperature thermodynamic laser irradiation area of the laser radiation, the regulation changes of the wave front of the laser radiation, control of cutting force of the cutter R, the strength parameters f rock by a sensor reception strength of rock that is installed on the frame of the fiber optic laser emitter, the control speed of career harvester Vki, introduction to the program algorithm for computing the wavefront of the laser power W depending on the strength parameters f rocks and the step of positioning the fiber-optic emitters lion the basis of the equation

li=2BVlnVki,

where B is the width of the stroke fiber laser emitter, the width of the milling surface of the career harvester, m; Vl- the speed of longitudinal displacement is s fiber laser emitter along the guides, m/s; n is the number of fiber emitters in the cassette; Vki- velocity of career harvester, depending on the strength parameters f rocks and changing the speed of career harvester Vkiin the case of zones increased or decreased fortress f in layer-by-layer band-pass milling rock, carry out the regulation of energy input wavefront of the laser radiation to the treatment area through the control unit of the laser intensity and the formation in the surface layer of the processed array of evenly spaced multi-row zones overlap of the laser slits possible without gleams through the drive movement of the fiber optic emitters.

The control system of the laser processing rock variable fortress, including the generation and supply of optical laser radiation, the control unit of the laser intensity, coupled with system the generation and supply of optical laser radiation, the microprocessor control unit, the registration unit and analysis of the energy distribution in the treatment area, equipped with a sensor registering the intensity of the laser radiation, which is connected to the recording unit and the analysis of the distribution of energy in the treatment area, and also provided with a block registratiekamer strength rocks, associated with the sensor reception strength rocks, equipped with a control unit of cutting force of the cutter and the speed of career processor, associated with the microprocessor control unit, which is connected with the control unit, the speed of longitudinal movement of the fiber optic laser emitter along the guides, the control unit speed career harvester and the speed of rotation of the cutter unit drive control movement of the fiber optic emitters and a control unit drive rotation of the frame, and the microprocessor control unit is associated with a block of registration and analysis of the energy distribution in the treatment area, the control unit of the cooling system and the control unit compressor system for supplying compressed air for dust removal from the zone of laser processing.

The possibility of the formation of the desired sequence of actions performed in a new way and the proposed means allows to solve the problem, defines novelty, industrial applicability and inventive step of the development.

The control system of the laser processing rock variable fortress shown on the drawings.

Figure 1 - General view of the control system of the laser processing rock variable fortress with career harvester; figure 2 - view And on IG; figure 3 - cross-section B-B in figure 2; figure 4 - section b-b In figure 2, at the location of the fiber emitters in a compressed form, with strong performance fortress f rocks and the decrease of velocity Vkimove career harvester; figure 5 - a section b-b In figure 2, the extreme extended position of the fiber emitters at low levels of the fortress f rocks and increase the velocity Vkimove career harvester; Fig 6 - section G-g of figure 5; figure 7 shows a multi-row zone of overlap of the laser slits formed at high performance fortress f rock; Fig shows multi zone of overlap of the laser slits formed at low indicators fortress f rock; figure 9 - block diagram of the control laser processing rock variable fortress with career harvester; figure 10 is a block diagram of a control step of positioning the fiber-optic emitters li.

System control 1 laser processing rock variable fortress contains a system of generation and supply of optical laser radiation 2, the control unit intensity laser radiation 3, connected with the system of generation and supply of optical laser radiation 2, the microprocessor control unit 4, block registration and analysis of the energy distribution in the treatment area 5. Datca is registering the intensity of the laser radiation 6 is connected to the recording unit and the analysis of the distribution of energy in the treatment area 5. The recording unit strength parameters of rock 7 is connected with the sensor reception strength of rock 8. The control unit 9 of the cutting forces of the cutter 10 and the moving speed of the career of the harvester 11 is connected to the microprocessor control unit 4. The microprocessor control unit 4 is connected with the control unit 12 by the speed of longitudinal movement of the fiber laser emitter 13 along the rails 14 by means of the actuator 15. The microprocessor control unit 4 is connected with the control unit 16 speed career harvester 11 and the speed of rotation of the cutter 10, the control unit 17 drive motion 18 of the fiber optic emitters 19 and the control unit 20 drives rotation 21 of the frame 22. The microprocessor control unit 4 is connected with the block registration and analysis of the energy distribution in the treatment area 5, the control unit cooling system 23 and the control unit compressor system for supplying compressed air for 24 extraction from the area of laser processing. The functionality of the process depends on the strength of rocks f, which affects the speed of travel of the harvester Vki11, the wave front of the laser power W and the formation of multilayer zones overlap of the laser slits 25, providing a high stress concentration, alternating loads and deformation when processing a large surface is rnost array. Fiber optic emitters 19 are connected between a movable hinge connections 26, which allow you to change the distance li27 between optical emitters 19. Fiber optic emitters 19 are moved via the actuator move 18 associated with the movable hinge connections 26. Coordination control distance li27 between optical emitters 19 when fixing strength parameters of rock f is realized by the algorithm in accordance with figure 10.

The method of controlling a laser processing rock variable fortress is implemented as follows.

The preliminary preparation of the rocks. The control unit 20 sends a signal to the actuator rotation 21 and the frame 22 is fixed at a certain distance from the treatment area. Fiber laser emitter 13 is mounted by means of the actuator 15 in the extreme position on the guides 14. Control of the strength parameters f rock by a sensor 8 reception strength of rock that is installed on the frame of the fiber optic laser emitter 13, the control speed of career harvester Vki11, the speed of rotation of the cutter 10 and the cutting forces of the cutter 10. Using the sensor recording the intensity of the laser radiation 6 control intensity h is atemperature thermodynamic laser irradiation area of the laser radiation. Information from the sensor registering the intensity of the laser radiation 6 is fed through the block registration and analysis of the energy distribution in the treatment area 5 in the microprocessor control unit 4 of the control system 1. The control unit 12 by the speed of longitudinal movement of the fiber laser emitter 13 along the rails 14 sends the command to the actuator 15 to move the fiber laser emitter 13 simultaneously with career harvester 11, which receives a command from the control unit 16 by the speed of movement of the career of the harvester 11. The program introduces the algorithm for computing the wavefront of the laser power W=f(f) depending on the parameters of strength f rocks and the step of positioning the fiber-optic emitters lion the basis of the equation

li=2BVlnVki,

where B is the width of the stroke fiber laser emitter 13, the width of the milling surface of the career of the harvester 11, m; Vl- the speed of longitudinal movement of the fiber optic laser emitter 13 along the rails 14, m/s; n is the number of fiber emitters 19 in the cassette; Vki- soon the be the career move of harvester 11, depending on the strength parameters f rocks.

When fixing the sensor 8 zones of high fortress f, in the process of milling of rocks, through the registration unit strength parameters of rock 7 and the microprocessor control unit 4 is instructed to the control unit 16 speed career harvester 11 and the speed of rotation of the cutter 10. The control unit 9 of the cutting forces of the cutter 10 and the moving speed of the career harvester Vki11 captures the current settings and sends them to the microprocessor control unit 4. Increasing the castle rock f entails changing the spacing 27 between optical emitters 19. The distance change 27 with travel drive 18 and the movable hinge connections 26 to the multiple areas of overlap of the laser slits 25 formed evenly, without gaps. Adjusting spacing 27 allows the formation in the surface layer of the processed array of evenly spaced multi-row zones overlap of the laser slits 25 while changing the moving speed of the career of the harvester 11. Extension distances libetween the laser slits 25 in the multiple areas of overlap compensated by regulating the deposition of energy in the area of laser processing. Through a system of generation and supply is pricescope laser radiation 2 is increasing capacity W of laser radiation. System generation and supply of optical laser radiation 2 is connected with the control unit of the laser intensity 3, which receives the command from the microprocessor to the control unit 4. The microprocessor control unit 4 is connected with the control unit 16 speed career harvester 11 and the speed of rotation of the cutter 10, and the control unit 17 drive motion 18 of the fiber optic emitters 19, the control unit cooling system 23 and the control unit compressor system for supplying compressed air for 24 extraction from the area of laser processing.

The method of controlling a laser processing rock variable fortress increases the efficiency of management of technological preparation for rock excavation, provides the possibility of remote control of destruction of rocks, improves working conditions, technical and ecological safety of the process.

Sources of information

1. RF patent №2362877 from 01.02.2008. How cyclical-and-continuous mining rocks.

2. RF patent №2456538 25.02.2011. The way of the explosive loosening rock charges with air cushion.

3. RF patent №2009322 from 15.03.1994. Method of mining ledges of rocks.

4. RF patent №2079657 from 20.05.1997. Method of mining ledges of rocks.

5. RF patent №2449106 from 13.10.2010. The method of drilling SLE is Jin using laser energy and device for its implementation.

6. RF patent №2422624 from 28.04.2010. The laser perforator of the hydraulic slit.

7. RF patent №2468141 from 27.11.2012. Adaptive control of the drive of the milling machine.

8. RF patent №1658514 from 20.01.2006. The method of laser processing and device for its implementation.

1. The method of controlling a laser processing rock variable fortress, including monitoring the intensity of the high-temperature thermodynamic laser irradiation area of the laser radiation, the regulation changes of the wave front of the laser radiation, characterized in that the control of cutting force of the cutter R, the strength parameters f rock by a sensor reception strength of rock that is installed on the frame of the fiber optic laser emitter, the control speed of career harvester Vki, introduction to the program algorithm for computing the wavefront of the laser power W depending on the strength parameters f rocks and the step of positioning the fiber-optic emitters lion the basis of the equation
li=2BVlnVki,
where B is the width of the stroke optovolokonnogo the laser emitter, equal to the width of the milling surface of the career harvester, m;
Vl- the speed of longitudinal movement of the fiber optic laser emitter along the guides, m/s;
n is the number of fiber emitters in the cassette;
Vki- velocity of career harvester
depending on the strength parameters f rocks and changing the speed of career harvester Vkiin the case of zones increased or decreased fortress f in layer-by-layer band-pass milling rock, carry out the regulation of energy input wavefront of the laser radiation to the treatment area through the control unit of the laser intensity and the formation in the surface layer of the processed array of evenly spaced multi-row zones overlap of the laser slits possible without gleams through the drive movement of the fiber optic emitters.

2. The control system of the laser processing rock variable fortress, including the generation and supply of optical laser radiation, the control unit of the laser intensity, coupled with system the generation and supply of optical laser radiation, the microprocessor control unit, the registration unit and analysis of the energy distribution in the treatment area, otlichayas the same time, that has a sensor registering the intensity of the laser radiation, which is connected to the recording unit and the analysis of the distribution of energy in the treatment area, and is equipped with a recording unit strength parameters of rock associated with the sensor reception strength rocks, equipped with a control unit of cutting force of the cutter and the speed of career processor, associated with the microprocessor control unit, which is connected with the control unit, the speed of longitudinal movement of the fiber optic laser emitter along the guides, the control unit speed career harvester and the speed of rotation of the cutter unit drive control movement of the fiber optic emitters and a control unit drive rotation of the frame, and the microprocessor the control unit is connected with the block registration and analysis of the energy distribution in the treatment area, the control unit of the cooling system and the control unit compressor system for supplying compressed air for dust removal from the zone of laser processing.



 

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