Device for control over arrow shaped operating member of mining machine

FIELD: mining.

SUBSTANCE: device for control over arrow of operating member of mining machine consists of hydro-cylinders of vertical lifting an horizontal turn and of arrow telescope, of half-throttle, included into line feeding working fluid into piston cavities of lifting hydro-cylinders, of double-sided hydro-locks included into feeding lines of lifting hydro-cylinders and telescope, of main distributors of hydro-cylinders control for lifting, turn and telescope, which are successively arranged to provide free overflow of working fluid into tank in neutral position, of main electro-hydro-distributors for control over main distributors and over additional distributor automatically switched on. There is also a main and additional pumps, a pressurising collector, safety valves, test pressure gages, a pressure regulator, a tank for hydro-system working fluid, and a control panel with buttons for six commands. Further the device contains a control station with a circuit of three memory elements and the element of logical function or operation, additional distributors with back valves on their outputs and correspondingly with throttles on control lines, pointed sensors of feedback, installed correspondingly on the hydro-cylinders and connected to memory elements.

EFFECT: power stabilisation of operating member of mining machine, increased efficiency of working member drive operation, increased energy saving at mine working and grade of extracted coal.

3 cl, 4 dwg

 

The invention relates to the mining industry and is intended to stabilize the power supply of the Executive body of the mining machine.

Known hydraulic circuit feeder swept Executive body (Baser YA, Crotalin VI, Y.A. Sokolov, Tunneling machines. - M.: Nedra, 1974, s, RES), providing for an increase in power supply due to the automatic summation of the capacities of the two pumps. The summation of the power is with the appearance of at least one of the six possible commands on the rise, the rotation of boom and extension of the telescope. The sum is performed continuously. The disadvantage of this device is that with the increase served on the Executive body of power increases the absolute value of the instability of power supply and, therefore, is irrational consumption of energy supply.

It is known, the control unit swept the Executive body of the mining machine (puffins A.A. Driver of mining excavation machinery. - M.: Nedra, 1991, p.132-133, RES.), made by electro-hydraulic circuit and including hydraulic vertical lifting, horizontal rotation and extension of the telescope boom, protocel included in the supply line of the working fluid piston cavities of the cylinders to compensate for the weight of the boom of the Executive body, TLD is a third-party hydrosome, included in the supply line of the cylinders and of the telescope, the main valves to control the hydraulic cylinders rotate, lift and telescope, connected in series to provide in their neutral position summary overflow of the working fluid of the main pump in the tank, electrohydraulically for management of major distributors, the primary and secondary pumps, accumulator fluid flows both pumps, pressure regulators, safety valves, control devices, a tank for fluid, pressure sewer, drain lines, electrical control panel with buttons for submitting commands to the electromagnets of electrohydrodynamically, control station with power supply electric circuit control device.

The device provides increased velocity of the diagonal feed boom, but does not provide stabilization, power supply, because the summation of the power both pumps are continually when submitting at least one of the possible commands, and with the increase of the supplied power increases the absolute value of the instability of power supply, significantly reducing the efficiency of the feed drive of the Executive body.

The objective of the invention is to stabilize power supply swept the Executive body of the mining machine.

Sushnost the invention is the device management arrow the Executive body of the mountain harvester includes hydraulic vertical lifting, horizontal rotation and extension of the telescope boom, protocel included in the supply line of the working fluid in the piston cavity of the cylinders, two-way hidrotambo included in the supply line of the cylinders and of the telescope, the main valves to control the hydraulic cylinders of the lifting, rotation, and telescope, connected in series to provide in a neutral position summary overflow fluid from the main pump to the tank, the main electrohydraulically for management of major distributors, the primary and secondary pumps, pressure regulators, safety valves, control devices, a tank for fluid, pressure sewer and drain lines, electrical control panel for filing six teams on the electromagnets main electrohydraulically, control station with power supply electric circuit control device and the additional valve throttles to control the inputs and check valves at the outlets, point sensors, each of which is arranged on a magnetically operated contacts which are fixed on the housing of the hydraulic cylinder and the constant is ignite, mounted on the deadlift, which is connected with the rod of the hydraulic cylinder with the ability to move synchronously to track the position of the piston of the hydraulic cylinder, while the sensors are conditionally divide the stroke into two zones: the first, in which the feed drive shafts supplied power only the main pump, and the second, in which the feed drive shafts received power of the primary and secondary pumps, and further comprises a dispenser automatic switch-on to switch additional working fluid pump, and more electrohydrodynamical, while the outputs of the main electrohydraulically connected to control inputs of additional distributors, namely, in the control circuit vertical lift left side controls the movement of the boom up, connected directly with the left managing the input of the distributor and through the choke and check valve - with the right managing entrance, right side, managing to move down through the throttle with the right managing input in the control circuit of horizontal rotation arrows left side through the throttle with the left managing entrance, right side through the throttle with the right managing input in the control circuit telescope extension of the Executive body of the left side through D. ossel - with the left managing entrance, right side through the throttle with the right managing inputs, outputs additional distributors are connected through check valves with the corresponding outputs of the main distributors for summing transmission capacity, magnetically operated contacts controlling the movement of the piston from the first zone to the second, connected to individual inputs of the respective memory elements, and controlling the transition from the second zone into the first - zero inputs of the respective memory elements, the unit outputs the three memory elements through the element OR is connected with the left electromagnet additional electrohydraulically, the outputs of which are connected respectively to control inputs of the distributor automatic switch-on pressure input connected to additional pump, and the left output from the pressure inputs for three additional valves, drain outputs last through the drainage line connected to the tank, the pressure inputs all electrohydraulically connected through a pressure manifold with the main pump and the drain entrances to the tank.

The installation location on the bodies of the cylinders point of the feedback sensors that monitor the boundary of transition from the first zone to the second, defined as the position of the piston of the hydraulic cylinder, the corresponding edge is glam lifting and turning arrows of the Executive body and the boundary extension of the telescope, which determine from a consideration of the relationship is transferred to the supply of power to the consumed power of the main pump, namely:

for vertical lifting edge angle βGdetermined from the expression:

wherethe power transferred to the arrow when it is lifting up;

N - power of the main pump;

ld- the distance from the axis of rotation of the boom to the fulcrum rod of the hydraulic cylinder on the boom;

l0- the distance from the axis of rotation of the boom to the fulcrum of the cylinder housing on the turret mountain harvester;

γ - the angle between the horizontal plane passing through the axis of the vertical arrows, and the direction of this axis on the bearing point of the housings of the cylinders (constant), C;

βG- edge angle of elevation of the boom from a horizontal plane, degrees;

0,14 - the minimum ratio of the transmission power of the primary pump.

- for horizontal rotation boundary angle αGdetermined from the expression:

wherethe power transmitted to the boom at the turn of the Executive body.

for telescope advanced forward with the notch of the crown is conical, from the expression:

where- specific power supply is required for the destruction of slaughter as burial crowns Executive body in the array;

lpc. g- boundary extension rod hydraulic cylinder, mm;

100 - normalizing coefficient, mm;

- the function describing the profile of the crown of the Executive body of the mining machine.

Point sensors that monitor the transition of the piston from the second zone in the first attached to the housings of the cylinders are offset relative to the point of feedback sensors that monitor the transition of the piston from the first zone to the second toward the first zone on the amount of bandwidth actuation of the magnetically controlled contact.

Figure 1 shows the schematic diagram of a device for controlling the boom of the Executive body of the mining machine.

Figure 2 presents the dependence of the power flow angle vertical lifting and boundaries of the area included in the additional pump.

Figure 3 presents the dependence of the power supply from the horizontal angle and the zone boundaries be included in the additional pump.

Figure 4 presents the dependence of specific power supply when the notch from the stroke of the piston of the hydraulic cylinder and the zone boundaries be included in the additional pump.

Device is isto to control the boom of the Executive body of the mining machine (1) contains the vertical lifting cylinders 1 and 2, horizontal rotation 3 and 4 and telescope 5 and 6, protocel 7 included in piston supply line of the cylinders 1 and 2, bilateral hidrotambo 8 and 9, included in the supply lines of the cylinders 1 and 2, 5 and 6, the main valves 10, 11, 12 for controlling the respective pairs of cylinders 1 and 2, 3 and 4, 5 and 6, additional dispenser automatic on 13, the main electrohydraulically 14, 15, 16, and an additional 17 to control the main valves 10, 11, 12, and additional dispenser automatic on 13 main 18 and the additional 19 pumps, discharge manifold 20, the safety valves 21 and 22, control gauges 23 and 24, the pressure regulator 25, the tank 26 to the working fluid of the hydraulic system, the control unit 27 controls six teams: the Executive body up S, down - HE left - OL, right OP, the telescope forward TA telescope ago - TN, United respectively with magnets electrohydraulically 14, 15, 16, the control station 28 with the scheme of the three memory elements and element OR additional valves 29, 30, 31 with check valves on their outputs 32 and 33, 34 and 35, 36 and 37, respectively, and inductors 38 and 39, 40 and 41, 42 and 43 on the control lines, respectively, point sensors 44, 45 and 46, mounted on cylinders 2, 4 and 6, respectively, and connection of the n memory elements, controlling the transition from zone I to zone II - isolated inputs, and controlling the transition from zone II to zone I - zero inputs of the memory elements. Single outputs of memory elements through the element OR is connected with the left electromagnet additional electrohydraulically 17. The left output of the additional distributor automatic on 13 connected to the pressure inputs additional control valves 29, 30, 31, and drain inputs last - drain line to the tank 26. The output of the main pump 18 through the manifold 20 is connected to the pressure input electrohydraulically 14, 15, 16 and 17, and the main valve 10. The main valves 10, 11 and 12 are connected in series. The output of the additional pump 19 is connected to the pressure input of the distributor automatic on 13. The outputs of the main electrohydraulically 14, 15, 16 is also connected to control inputs of additional valves 29, 30 and 31, while the left output of the main electrohydraulically 14 is connected directly with the left managing inlet valve 29 and through the orifice 38 and the check valve with the right input and right output through the orifice 39 with the right input, the outputs of the main electrohydraulically 15 and 16 through chokes 40, 41, 42, 43 are connected respectively left with left managing log, right - with the right input of the valves 30 and 31.

The installation location of point sensors boundaries of the transition from zone I, in which the summation of the power supply is not performed, the zone II in which the sum of these capacities is in proportion to the functions, ensuring stabilization of the power supply with regard to tolerance, namely from equalities:

for vertical lifting edge angle βGdetermined from the expression:

wherethe power transferred to the arrow when it is lifting up;

N - power of the main pump;

ld- the distance from the axis of rotation of the boom to the fulcrum rod of the hydraulic cylinder on the boom;

l0- the distance from the axis of rotation of the boom to the fulcrum of the cylinder housing on the turret mountain harvester;

γ - the angle between the horizontal plane passing through the axis of the vertical arrows, and the direction of this axis on the bearing point of the housings of the cylinders (constant), C;

βG- edge angle of elevation of the boom from a horizontal plane, degrees;

0,14 - the minimum ratio of the transmission power of the primary pump.

- for horizontal rotation boundary angle αGdetermined from the expression

where the power transmitted to the boom at the turn of the Executive body.

for telescope advanced forward with the notch of the crown is conical, from the expression:

where- specific power supply is required for the destruction of slaughter as burial crowns Executive body in the array;

lSTG- edge extension of the piston of cylinder, mm;

100 - normalizing coefficient, mm

- the function describing the profile of the crown of the Executive body of the mining machine.

Point sensors for feedback controlling the transition from II zone I zone set on the bodies of the cylinders offset by the amount of bandwidth actuation of the magnetically controlled contact in the direction of the first zone relative to the point of feedback sensors that control the transition of the piston from the I zone II zone.

In figure 2 the following notation:

47 - the power of the main pump; a 48 - horsepower for compensation of the weight of the boom of the Executive body when lifting up; 49 - the power transferred to the Executive body from the main pump; 50 - power supply, transferred to the Executive body from the secondary pump; 51 - total power supply on Executive authority; 52 - the boundary between zones I and II; 53 limit boundary of zone II and the allowable lower corner β vertical lift boom; γ is the angle describing the construction of the vertical lifting of the Executive body, a constant value for a specific type of mining combine. Area variance stabilized power supply when a vertical rise is shaded.

Figure 3 the following notation:

54 - the power of the main pump; 55 - power supply, transferred to the Executive body from the main pump; 56 - power, transferred to the Executive body from the secondary pump; 57 - total power transferred to the Executive body at a horizontal rotation arrows α; 58 - the boundary between I and II areas management. Area variance stabilized power supply for horizontal rotation hatched.

Figure 4 the following notation:

59 - the power of the main pump related to the square cut at the notch bottom with a telescope; 60 - specific power from the main pump, transferred to the Executive body, depending on the depth of its groove in the face; 61 - power from the secondary pump, transferred to the Executive body; 62 - the total power transferred to the Executive authority related to the square of cut; 63 - the boundary between zones I and II with the notch in the bottom; 64 - the boundary between zones II and I at the completion of the notches. Area variances camera is lysed power supply when the notch in the bottom with a telescope hatched.

The device operates as follows. Originally include in the core 18 and the additional 19 pumps. Before submitting commands of the working fluid from the main pump through the discharge manifold 20 and the main valves 10, 11 and 12 flows into the tank 26, the pressure inputs electrohydraulically 14, 15, 16 and 17 creates a routine pressure ˜1.0 MPa, providing actuation of one of the valves 10, 11, 12 and 13 when applying one of the control commands. Management team: Executive body up S; down - IT; left - OL; right OP, the telescope forward - TP; telescope ago - TN, filed with the remote control 27 buttons, trigger the corresponding electrohydraulically switch which causes actuation of the dispenser 10, 11 or 12, respectively. At the same time served the hydraulic signals on additional valves 29, 30 and 31 respectively, but due to the choke installed on the control inputs of the latter, their switching slows down for a few seconds - the time during which the Executive body reaches or crosses the boundary between zones I and II, resulting in fires dot the feedback sensor 44, 45 or 46, respectively, and sends a signal to the memory element, and the latter through a chain OR includes additional electrohydrodynamical the 17 with the subsequent inclusion of additional dispenser automatic on 13 and flow of operating fluid to the additional valves 29, 30, 31 and through the one that worked, is transmitted to the cylinders. Displaced from the cylinders, the working fluid returns to the tank through the dispenser 10, 11 or 12. Drain the inputs of the valves 29, 30, 31 connected to the drain line through which the diverted liquid flows, which prevents jamming and provides reliable operation.

The specifics of the execution of the command S is that, typically, it begins in the second area, in which you want to enable additional pump with a gradual decrease of transmitted this pump power, which is achieved by the appropriate inclusion of inductor 38, through which the flow of fluid, which leads to the gradual equalization of pressure on the control inputs of the additional valve 29 and the centering springs return it slowly to the neutral position. The dependence of the transmitted power from the elevation shown in figure 2. The dependence of the transmitted power from the rotation angle α see figure 3.

When the notch of the crown in the face and feed by means of a telescope of the Executive body with a hollow in the array changes size of the cut, it is therefore necessary to stabilize the specific transmitted power for crowns depending on their profile. Figure 4 shows the dependence of specific power supply of the expansion in the face (you is viginia telescope) for a crown conical profile.

The proposed device stabilizes the power supply of the Executive body, reduces the unevenness of the static load of the actuator of the Executive body, increasing its reliability and power savings, improves the quality of the coal.

1. Device to control the boom of the Executive body of the mountain harvester, including hydraulic vertical lifting, horizontal rotation and extension of the telescope boom, protocel included in the supply line of the working fluid in the piston cavity of the cylinders, two-way hidrotambo included in the supply line of the cylinders and of the telescope, the main valves to control the cylinders and rotate the telescope, which is connected in series to provide in a neutral position free flow of working fluid from the main pump to the tank, the main electrohydraulically for management of major distributors, the primary and secondary pumps, pressure regulators, safety valves, control instruments, tank working fluid pressure sewer and drain lines, electrical control panel with buttons for filing six teams on the electromagnets main electrohydraulically, control station with power supply electric circuit controlling the Oia device, characterized in that it comprises an additional valve throttles to control the inputs and check valves at the outlets, point sensors, each of which is arranged on a magnetically operated contacts which are fixed on the body of the cylinder, and a permanent magnet, which is installed on the deadlift, which is connected to a piston rod of the hydraulic cylinder with the ability to move synchronously to track the position of the piston of the hydraulic cylinder, while the sensors are conditionally divide the stroke into two zones: the first, in which the feed drive shafts supplied power only the main pump, and the second, in which the feed drive shafts serves power of the principal and additional pumps, and further comprises a dispenser automatic switch-on to switch additional working fluid pump, and more electrohydrodynamical, while the outputs of the main electrohydraulically connected to control inputs of additional distributors, namely, in the control circuit vertical lift left side that controls the movement of the boom of the Executive body up, connected directly with the left managing the input of the distributor and through the throttle valve with the right managing entrance, right side, operated the General movement down through the throttle with the right managing input in the control circuit of horizontal rotation arrows left side through the throttle with the left managing entrance, right side through the throttle with the right managing input in the control circuit telescope left side through the throttle with the left managing entrance, right side through the throttle with the right managing inputs, outputs additional distributors are connected through check valves with the corresponding outputs of the main distributors for summing transmission capacity, magnetically operated contacts controlling the movement of the piston from the first zone to the second, connected to individual inputs of the respective memory elements, and controlling the transition from the second zone in the first - zero inputs of the respective memory elements, the unit outputs the three memory elements through the element OR is connected with the left electromagnet additional electrohydraulically, the outputs of which are connected respectively to control inputs of the distributor automatic switch-on pressure input connected with an additional pump, and the left output from the pressure inputs for three additional valves, drain outputs last through the drainage line connected to the tank, the pressure inputs all electrohydraulically connected through to the priori manifold with the main pump, and drain inputs to the tank.

2. The device according to claim 1, characterized in that the installation location on the bodies of the cylinders point of the feedback sensors that monitor the boundary of transition from the first zone to the second, defined as the position of the piston of the hydraulic cylinder corresponding to the boundary angles of ascent and rotation arrows of the Executive body and the boundary extension of the telescope, which is determined from the assessment of the relationship is transferred to the supply of power to the Executive body to the consumed power of the main pump, namely:

for vertical lifting of the Executive body boundary angle βGfrom the expression

where- power supply transmitted to the arm when lifting the Executive body;

N - power of the main pump;

ld- the distance from the axis of rotation of the boom of the Executive body to the fulcrum rod of the hydraulic cylinder on the boom;

l0- the distance from the axis of rotation of the boom to the fulcrum of the cylinder housing on the turret of the harvester;

γ - the angle between the horizontal plane passing through the vertical axis of rotation arrows, and the direction of this axis on the bearing point of the housings of the cylinders (constant), C;

β G- edge angle of elevation of the boom from a horizontal plane, degrees;

0,14 - the minimum ratio of the transmission power of the main pump,

for horizontal rotation of the Executive body boundary angle αGfrom the expression

where- power supply transmitted to the boom at the turn of the Executive body;

αG- edge angle from the longitudinal line of symmetry of the harvester, degrees,

for the telescope, raised forward when you cut the crown is conical, from the expression

where- specific power supply is required for the destruction of slaughter as burial crowns Executive body in the array;

lSTG- edge extension of the piston of cylinder, mm;

100 - normalizing coefficient, mm;

- the function describing the profile of the crown of the Executive body of the mining machine.

3. The device according to claim 1 or 2, characterized in that spot feedback sensors that monitor the transition of the piston from the second zone in the first attached to the housings of the cylinders are offset relative to the point of feedback sensors that monitor ereht from the first zone to the second, towards the first zone on the amount of bandwidth actuation of the magnetically controlled contact.



 

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FIELD: mining industry, particularly for drilling exploratory and pressure-relief wells before mineral extraction from formations, including outburst-dangerous formations and ones characterized with high gas content.

SUBSTANCE: drilling rig comprises housing, support, drive to rotate drilling rod provided with cutting tool and hydraulic cylinder for cutting tool pulldown. Electrohydraulic valve is installed in hydraulic cylinder circuit. Electric drive of electrohydraulic valve is linked with load-sensing unit, which detects load applied to drilling rod rotation drive. The electric drive is connected to load-sensing unit through amplifier relay to provide bringing amplifier relay into operation when load applied to rotation drive exceeds nominal load by 20-30%. Cutting tool is made as symmetric screw conveying surfaces defining forward and reverse strokes connected one with another through generatrix. Side cutting edges of surfaces defining forward and reverse strokes are spaced apart.

EFFECT: increased operational reliability along with reduced power inputs for drilling, possibility to remove rod from well with negligible deviation thereof from predetermined direction of drilling.

2 cl, 3 dwg

FIELD: mining, particularly remote control specially adapted for machines for slitting or completely freeing the mineral.

SUBSTANCE: device comprises the first, the second and the third asynchronous motors. The first and the second electric drives are connected to drive sprocket of closed pull chain provided with plough carriages, which may move along guiding means. Device also has hydraulic cylinders to move guiding means to face, mechanical gear, the first and the second safety hydraulic valves, the first and the second hydraulic pumps, the first and the second frequency converters, the first and the second frequency regulators, load sensors, load balancing unit, load regulator, load assignment unit, control unit, initial setting signaling unit, hydraulic distribution means, which control hydraulic cylinders to move guiding means to face, hydraulic units, electrohydraulic unit, channel switching unit, flow meter, excavated seam thickness setting unit, breakage face length setting unit, multiplication unit, divider, optimizing peak-holding controller, control signal generation unit, asynchronous single-phase motor and screw gear made as a nut and screw. The first and the second hydraulic pumps include volume regulation means.

EFFECT: reduced specific energy consumption along with increased front plant output.

1 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining, in particular, to navigation system of combined cutter-loader intended for operations in open-pit bench. This mining equipment includes a combined cutter-loader, a conveyor assembly, and a steering assembly, which joins said combined cutter-loader and conveyor assembly. In addition, this equipment includes a course sensor and a steering device, which is sensitive to signals from said course sensor. The first drive is located in combined cutter-loader, in conveyor assembly, or in steering assembly. The first drive is placed on one side of combined cutter-loader centreline. In addition, the second drive is located either in combined cutter-loader, or in conveyor assembly, or in steering assembly. The second drive is placed on another side of combined cutter-loader centreline. The first and the second drives are used to adjust angle of joint between combined cutter- loader and conveyor assembly on either side of parallel line in order to keep pre-defined direction of combined cutter-loader advancing.

EFFECT: precise driving of combined cutter-loader in order to increase coal cutting from mining zone.

22 cl, 13 dwg

FIELD: mining.

SUBSTANCE: device for control over arrow of operating member of mining machine consists of hydro-cylinders of vertical lifting an horizontal turn and of arrow telescope, of half-throttle, included into line feeding working fluid into piston cavities of lifting hydro-cylinders, of double-sided hydro-locks included into feeding lines of lifting hydro-cylinders and telescope, of main distributors of hydro-cylinders control for lifting, turn and telescope, which are successively arranged to provide free overflow of working fluid into tank in neutral position, of main electro-hydro-distributors for control over main distributors and over additional distributor automatically switched on. There is also a main and additional pumps, a pressurising collector, safety valves, test pressure gages, a pressure regulator, a tank for hydro-system working fluid, and a control panel with buttons for six commands. Further the device contains a control station with a circuit of three memory elements and the element of logical function or operation, additional distributors with back valves on their outputs and correspondingly with throttles on control lines, pointed sensors of feedback, installed correspondingly on the hydro-cylinders and connected to memory elements.

EFFECT: power stabilisation of operating member of mining machine, increased efficiency of working member drive operation, increased energy saving at mine working and grade of extracted coal.

3 cl, 4 dwg

FIELD: mining.

SUBSTANCE: system consists of optical master of direction- laser, of diaphragm, of photo-receiving device, of interface module, of sensors of position of each degree of actuator mobility, of tilt sensor, of blocks of control over electro-hydro-valves and of computer device. The photo-receiving device consists of semi-transparent mirror assembled at angle of 45 to lengthwise axis of the case of the device, of two screens - the tail and knife ones with zero-marks, and of two video-modules. The tail screen is arranged above reflecting surface of the semi-transparent mirror so, that it is parallel to lengthwise axis of the device, while the knife screen is located at some distance beyond non-reflecting surface and perpendicular to lengthwise axis. Each video-module is installed behind the corresponding screen at the focal distance of the objective.

EFFECT: upgraded reliability and efficiency of control over actuator.

6 dwg

FIELD: mining.

SUBSTANCE: group of inventions is related to system and methods for control of getting machine along bottomhole in underground mine tunnel, and also to mining face for method realisation. Method includes measurement of gas concentration and depending on measurement results, generation of warning signal. At the same time volume of production achieved by getting machine is additionally established. In case of insufficient correlation between volume of production and gas concentration, a warning signal is generated.

EFFECT: invention provides for possibility to minimise danger of methane gas explosion in mining face, to establish fact of gas sensor failure and/or manipulation with it.

26 cl, 3 dwg

FIELD: mining.

SUBSTANCE: device for orientation of tunnelling system during construction of curved tunnels includes the units located in line of sight and at the specified distance from each other, the end ones of which are rigidly fixed, one - in starting tube, and the other one - on tunnelling shield, intermediate units are installed inside the erected part of the tunnel, each unit is equipped with a photo sensor, light emitting element and roll sensor, also, the device is provided with sensor of amount of advance and data transfer channels between the device assemblies and computing unit with a display; at that, each unit is equipped with a plate with sector symmetric light-tight slots, plate is located on motor shaft the axis of which coincides with the direction of tunnelling operation, on both sides of the plate in horizontal and vertical planes passing through motor axis there installed are light-emitting elements directed to the plate side; at that, each unit contains differently directed photo sensors oriented parallel to motor axis.

EFFECT: improving the orientation accuracy of tunnelling system and operating characteristics of the device, and increasing standardisation of the device components.

3 dwg

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