Coal extraction device

FIELD: mining.

SUBSTANCE: extraction device of coal in longwall face of underground mine working consists of the following: many sections of powered support, which are installed near each other throughout the length of longwall face between gates; plough machine; chute and conveyor located in it with possibility of movement, which are located throughout the length of longwall face between extraction machine and support sections; several deflecting devices and control device. Plough machine is provided with possibility of being moved along the line of the mining face and equipped with rock detection sensor which is provided with possibility of transmitting radio data of the detected rock to the control device of the support by means of the transmitter installed on the plough and the radio receivers installed along the longwall face. Group of adjacent support sections and sections of the chute corresponds to each deflecting device. Deflecting device is connected to control unit of one of the support sections of the appropriate group, and depending on the data of the detected rock, it provides the possibility of lifting the chute sections of the appropriate group, which is accompanied with lowering of the tools of the plough machine, and lowering of the chute sections, which is accompanied with lifting of plough machine tools. Control device includes the following: bottomhole control unit located at the end of longwall face for control of functions of support sections in relation to unloading, transportation and bracing of the support; control units of sections, each of which is put into spatial and functional compliance with the appropriate support section for performing and further transmitting the commands from bottomhole control unit; and the bus connecting mainly in series the bottomhole control unit to control units of support sections. At that, rock sensor when moving beside each support section is provided with possibility of generating the measurement signal characterising the detected rock only for several, mainly not more than two measurement points. Measurement signals received at neighbouring measurement points are subject to analysis with a view to predominance of rock or coal. Depending on analysis results, there generated is deviation signal supplied to the common deflecting device common for all measurement points, and namely to the deflection of the chute sections, which causes the lifting of plough machine tools if analysis results show the predominance of rock at the analysed measurement points, and to deflection of the chute sections, which causes the lowering of the plough machine tools if the analysis results show coal predominance at the analysed measurement points.

EFFECT: possible quick correction of the plough machine position during the coal extraction, which causes the lifting and lowering of the plough.

9 cl, 2 dwg

 

The invention relates to a device for the extraction of coal in accordance with the restrictive part of paragraph 1 of the claims.

Managing excavation of coal is known, for example, from DE 10018481 A1 (TVT 9905).

In lava installed a certain number of radios, consistently associated with the Central unit in the ventilation drift (downhole control unit). Each radio continuously receives information from the sensor breed and sends this information to the downhole control unit for processing. This block is determined, does the plow machine in the area of the coal face or already cuts the boundary layers of the host rock. Depending on that plow, the machine must be raised or lowered. Lifting the plow machine is carried out by placing the edge of the gutter, and plow the machine tilts or overturns around the sliding bearing is located in the zone of the mid-width of the gutter. The lowering of the same plow machine is due to the fact that neighboring lining the edge of the gutter by deflecting device rises, causing the plow machine rotates around the pole sliding in the opposite direction.

The basis of the invention was based on the task of acceleration control so that the position of the plow machine can be adjusted for the possibility of the spine in the process of coal extraction, but in any case, during the reverse movement, causing the lifting and lowering of the mining machine.

The solution of this problem is achieved by a set of characteristics paragraph 1 of the claims, based on the fact that the speed control depends, in particular, from the transmitted amount of data, but on the other hand, for optimum from the point of view of the practice manual control plane enough even limited according to the invention the amount of data. In the area of each section mechanized (shield) lining are preferably only two dimensions, essentially at the same height.

To further reduce the transmitted amount of data and speed control is an option on paragraph 2, of the claims. In this embodiment also achieves increased reliability by eliminating the need to connect the radio via cable laid along the trench (panline). The unit control section at each of the shields connects with a single radio. Because the signal has to cover only a short section is in practice not more than 3 m for confident and reliable transmission need only a small signal power. Currency accepted signals and their processing can be carried out with the help of the bus that connects the control unit all shields between themselves and szabina control unit.

In the variant according to paragraph 3 of the claims for further accelerating control signal processing can occur in any control unit shield section, preferably in the same control block shield section, which is closest to the respective deflecting device and therefore assigned to interact with him.

In an improved design variant of the device according to the paragraph 3 of the claims characterizing the breed data for analysis is collected in the adjacent control units support units, in particular the control unit shield section group, which is set in correspondence to the respective deflecting device and then analyzed in order to prevail in these characterizing rock the signals "breed" or "coal". For this purpose, each control block shield section has its own computing unit or a control unit (controller)that allows using the program, preferably recorded in each control block shield section, install, cuts whether plow machine at the moment, in the zone just passed the shields are primarily rock or coal. By processing collected on several neighboring shields characterizing breed of data by a program stored in accordance with the laws the respective control block shield section or the downhole control unit, or manually decides what portion of the length you want to change the position of the plow machine by raising or lowering.

In alternative or additional embodiment of the invention, described in paragraph 4 claims, pre-processing the measured characterizing breed of signals occurs in roaming with plow machine microprocessor. This pre-processing may occur so that using the appropriate sensor breed radios to transmit only a simple "black and white"signals "coal" or "breed".

The system could decide how long recognized the breed you want to change the position of the plow, the device according to item 5, equipped with inclinometers (cranmere). To send all measuring signals on paths along the pipeline bus these inclinometers can be connected to a downhole control device.

Variant of the device according to paragraph 6 serves to reduce passing through the downhole control unit amount of data.

In accordance with the option under paragraph 7 for reducing the cost of additional cable connection radio signals tilt radios are allocated by the control unit shield section, which is closest to inclinometry. Typically, this is the control block shield section, which in the embodiment of paragraphs 1-3 of the claims raised in the spatial and functional compliance of the deflecting device.

There is another problem, which is that for the power of the inclinometer and the corresponding transmitter requires a cable connection. This can be avoided in a variant of the device according to the paragraph 8 of the claims. When this option under paragraph 9 claims provides long service life and life save battery charge. In this regard, in the embodiment of paragraph 9 uses the fact that the implementation of the inclinometer functions measurement and data needs within a very short time (e.g. 5-10 seconds)until the plow truck moves past a certain number of shields, correlated with the inclinometer to pass characterizing breed data, for example, two measuring points on each shield section. For this reason, the power battery of the inclinometer and posted sensor is moving past the plane, for example due encoded in a special way radio plow machine or its sensor. The power of the battery may occur after a predetermined period of time.

Figure 1 as an example, schematically shows a view of the lava in the plan.

Figure 2 shows a detail view with the inclinometer.

Plow machine 2 performs in lava (e.g., length 300 m) along the line of treatment, or gate (not shown) reciprocating movement at high speed (for example, 3 m/s) using a conveyor chain 23. This plow machine 2 directional moves past the gutter (panline) 18, consisting of sections (pan) 4. It repulsed the coal is transported to the ends of the lava. Lava overlaps and is supported at the top of the next sections of powered roof supports (shields)that are installed close to each other on facing away from the coal face side of the chute and in addition to its function of maintaining the breed also perform the function of maintaining the chute in the direction of the coal face and movements of the sections of the gutters as clean coal face. Each shield section contains deflecting device 5, as described below.

Each shield section also contains the control block section (block 12 control) to manage separate shields functions, in particular unloading, shifting and spreading out the lining. Shield lavas are interconnected by a bus commands, measurement and functional signals can be transmitted to each of the control units sections, and with digitalnoy line 21 - and downhole control unit and/or the Central control unit.

Plow machine 2 is equipped with a sensor 3 of the breed and the corresponding microprocessor 28. Such sensors 3 breed are known and are supplied, for example, the firm TEC5 AG, in gamerule. Their task is to continuously analyze the rock or coal, appear/appear in the cutting zone plow machine at the front of the treatment works the mined seam and to determine cut if the plows plow machine into the reservoir (coal) or out up or down (rock). Depending on this, the chute 18, or its adjacent section, turn around average or located by gate reference skis (not shown) by sliding or cleaning deflecting device 5 made in the form of a power cylinder (deflecting cylinder) in the plane perpendicular to the direction of movement of the plane (the direction of the conveyor chain 23) so that when the plows plow machine was installed at the coal face below (down), if the sensor breed determines that the seam falls in the direction of movement of the plow machine, or higher (up), if the sensor breed will install that the reservoir rises in the direction of movement of the plow machine. Deflecting cylinders 5 is installed on each of the shields. Depending on the specific conditions can the t to be sufficient to provide a deflecting device deflecting cylinder on each sixth-twelfth of the shields.

It should be noted that the slopes of the reservoir, to a certain extent also occur due to regulation cutters and, in particular, the soil cutter, so lowering or lifting due to the rotation of the sections of the gutter should be used only in extreme geological conditions.

Of particular importance for the performance of the installation has to ensure that the appropriate control commands to the rotation of the gutter sections were transferred to the control unit, in particular downhole and Central control units, as quickly as possible in order to adjust the position of the plow machines in height by lowering or lifting as possible with the passage of the plane forward, and at the latest during the reverse course. In known installations cannot do this because of the data stream, which is not fast enough to manage when you usually have your computer's performance. Therefore, the invention provides that the measurement by a sensor breed is not continuously, but from time to time, preferably when passing plow machines by section 17 of the lining (about 1.5 m) and only twice in the points 15, 16 measurements. The measurement is carried out on plots of essentially the same height. It turned out that this can be quite accurate recognition of the breed with the purpose of control planes, which, on the other hand, has the p is akusherstvo, that the rise or lowering of the planes may occur in the shortest possible time, so that, on the one hand, do not cut the host rock, and on the other hand, is always removed the maximum possible layer of coal. Thus take into account the following circumstances:

- setting up and adjusting the position of the plow may not be exercised arbitrarily quickly due to the high inertial mass and efforts;

- at the speed of a plane, for example, 3 m/s lava length of 300 m is traversed in forward and backward directions in less than 3 min;

- in this short time is unlikely to take more than four position adjustments of the plow.

These adjustments are made on the basis of the analysis and, in particular, calculating the average value of the measurement data, which are issued between two or more position adjustments of the plow.

To accelerate the formation of the processed measurement signal of the sensor breed is also equipped with microprocessor 28 mounted on the plow machine. Due to this, the microprocessor first analysis of the data from the sensor breed is performed so that the output signal is transmitted to them through the radio transmitter 9 can be understood and used without additional time-consuming processing, and that such a signal could contain unambiguous information: "breed" or "coal".

For Yes nashego speed up the transfer and processing of characterizing breed data sensor 3 rocks as already mentioned, are equipped with a radio transmitter 9, which passes characterizing breed data, possibly after and as described processing by the microprocessor 28 on one of the receivers 11, set in accordance with a control unit of each of the shields. Therefore, the radio communication is limited to a relatively small and definite amounts of data and loved the area, which never exceeds 3 m, as between the transmitter 9 and one of the radios 11 there is only a very short period. The transferred data are sent by the receiving system management support through the bus 22 on downhole and Central control units. The existing large computer performance enough to quickly process the received data and using a signal about whether or not to lower the coal face coal or rock, to decide whether to agree the position of the line/position sections of gutter at the expense of lowering or lifting on the same area of the face length or over the entire length.

For this decision and, in particular, to automate this decision and move with the purpose of automatic control for downhole and Central control units are also signals the position of the troughs or sections. For this purpose, the chute secured several inclinometers 20, each of which belongs to the same group as the neighbour of their sections of the gutter. If the deflecting device is associated not with each shield section, and for example, only every sixth, the inclinometer is located in the groove in the impact zone of the respective deflecting device or a section of the gutter affected by the deflecting device. The inclinometer comprises one group of sections of the gutter. This group includes in this case five or six neighboring sections. Each inclinometer 20 is equipped with a radio transmitter 24. This transmitter produces a signal characterizing the slope of the gutters, to the radio receiver 25 connected to the control unit 17 of the shield, which is the closest opposite the inclinometer 20. The drawing shows a special radio receivers 25. However, receiving data about the inclination can also be described by the radio receiver 11, if the data characterizing the rock and the slope section of the chute, are transmitted using different coding, which allows the host data block management support to decide whether data characterizing the breed, or data characterizing the slope of a section of the gutter. Data skew is transmitted to the receiving unit 12 of the control posts of the bus 22 and the connecting line 21 on downhole and Central control units.

It should be noted that not shown in the drawing, the position sensors, each of which is supplied in line is the influence of each of the shields, detects the presence of a plough and reports this via the control unit supports downhole and Central control units. Other types of positioning, described, for example, in DE 19982113.5-24.

Electrical energy for transmission of radio signals fed to the individual inclinometers placed through each one rechargeable battery, or the battery 26. To save energy, each inclinometer includes a sensor 27 (e.g., transponder), which detects the presence of a plow machine and depending on its approach includes the power supply, and when it is removed off. Thus, measurement can be performed in the actual phases of movement of the plow, not using interfering in the underground workings of the inlet lines to the inclinometers and without failures.

Figure 2 in an enlarged view depicts one of the inclinometer 20. Each of them can be supplied with current through the battery/battery 26, etc. Inclinometer includes a sensor 27, such as a transponder, which at the approach of the plow machine closes the switch to supply power to the transmitter 24, and after passing in the distance or, for example, depending on time again unlocks it. Due to this, it is possible to reduce the energy consumption so that the inclinometer can be used not only without lead wire is Yes, but for a long time without maintenance.

1. Device for the extraction of coal in longwall mines, including
many of the sections (17) powered roof supports installed next to each other along the length of the lava between the drifts,
plow machine (2)mounted for movement along the line of the stope and is equipped with a sensor (3) for the recognition of species, which is arranged to transmit radio data recognized breed in the device (12) management support through the established on the plane of the transmitter (the transmitter 9) and installed along the lava radios (11),
the trench (18) and located with the possibility of movement in it the conveyor along the lava between the mining machine and shields,
several deflecting device (5), and each deflecting device is set in accordance with the group of adjacent lining sections and the sections of the chute, deflector device connected to the unit (12) controls one of the support units of the respective group, and depending on the data recognized breed provides a lifting sections (4) troughs of the respective group, accompanied by a lowering of the plow tools of the machine, and lower sections of the gutter, accompanied by the rise of tools plow machine,
control device, the content is the future downhole control unit (link 21), located at the end of the lava to control the functions of shields against unloading, shifting and spreading out the roof support units (12) control sections, each of which is placed in the spatial and functional compliance of the relevant section (17) lining for execution and further transmission of commands from the downhole control unit, and a bus connecting preferably sequentially downhole control unit and the control units support units, characterized in that
the sensor (3) breed when driving past each section (17) lining made with the possibility of issuing a measurement signal characterizing the detected breed (characterizing breed signal) for only a few, preferably no more than two measurement points,
measuring the signals received in adjacent measurement points are analyzed for prevalence of rock or coal, and depending on the results of the analysis of the signal variances issued in total for all measurement points deflecting device, namely the deviation of the sections of the chute, causing the rise of tools plow machine, if analyzed in the measuring points of the analysis results show the predominance of the breed, and to reject sections of the gutter, causing lowering of the plow tools of the machine, if the analyzed points, u is the average analysis results show the predominance of coal.

2. The device according to claim 1, characterized in that each section (17) roof support unit (12) management is equipped with(a) radio (11), and plow machine - transmitter (24) for transmission on the radio describing the breed of signals on the local radio, and with the help of the device measuring the position of the plane associated with the device management support, characterizing rock the signals are correlated with the nearest to plow machine the shield section.

3. The device according to claim 1, characterized in that each group of sections (17) lining ascribed to one deflecting device (5), at least one, and preferably each, of the block (12) control shield section is equipped with a microprocessor configured to generate signals of variance for correlated with this group deflecting device, and program memory in which is recorded a program describing a breed of signals and convert these signals correlated with deviations for group deflecting device.

4. The device according to claim 1, characterized in that the plow machine (2) is equipped with a microprocessor (28), in which program processing the measured characterizing breed of signals and convert them to the transmitted radio transmitters (24) signals to distinguish between coal and rock.

5. The device according to claim 1, characterized those who, each of the deflecting device is set in accordance with the inclinometer (20), which measured the current value of the slope of the gutter or its sections (4) in their transverse direction is served in the device management support as actual values to be consistent with the signal of the deviation produced in the result of the analysis of the measuring signals.

6. The device according to claim 5, characterized in that each inclinometer (20) is equipped with a radio transmitter (24) for transmitting radio signals of the slope on the fixed radios (25)along the lava at a distance from each other.

7. The device according to claim 6, characterized in that for the transmission of radio signals of the slope on the fixed radios along the lava at a distance from each other, each one corresponding to the inclinometer sections (17) roof support unit (12) management equipped with a radio receiver (25).

8. The device according to claim 7, characterized in that each inclinometer is equipped with a battery (26) for power supply of the inclinometer and the associated functional elements, in particular of the corresponding transmitter.

9. The device according to claim 8, characterized in that each inclinometer is equipped with a switching circuit and switching power from the battery, and the inclusion comes from the sensor (27) for determining preblei is of moving past the plow machine or by radio signal, submitted plow machine installed on it through the transmitter, and the switching takes place appropriately or after some time.



 

Same patents:

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22 cl, 13 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

Well drilling rig // 2265121

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: mechanical engineering, particularly to perform remote control specially adapted for machines for slitting or completely freeing the mineral.

SUBSTANCE: system includes electric drive for cutting tools, hydraulic drive for feeder legs and crawler, two-stage control hydroblock to operate the hydraulic drive having inlet channel, hydrocylinder with piston cavity for support erector, control hydroblock adapted to operate support erector hydrocylinder, blocking hydrocylinder having spring-loaded shaft return means, two-positioned pilot spool, pumps, pressurizing means and discharge means. Pilot spool has outlet channel and hydrocontrol cavity to provide pilot spool fixation in two working positions. Outlet channel of pilot spool communicates with outlet channel of two-stage control hydroblock adapter to operate the hydraulic drive of feeder legs and crawler to provide alternate communication between outlet pilot spool channel and pressurizing and discharge means. Hydrocontrol cavity of pilot spool communicates with blocking hydrocylinder and piston cavity of support erector hydrocylinder.

EFFECT: increased safety for people present in zone of moving mining machine parts action.

1 dwg

FIELD: mining industry.

SUBSTANCE: mining combine has extraction means, on which a body is mounted, having at least one first liquid outlet, for supplying liquid to material. Pipeline, through which liquid is fed to first liquid outlet, contains means for measuring flow and/or pressure of liquid in pipeline, for determining, in which of to layers outlet is positioned. Combine can have at least one second liquid outlet, placed in such a way, that first liquid outlet is in lower layer, and second liquid outlet is placed in upper layer. First liquid outlet can have one of multiple first liquid outlets spaced from each other, and second liquid outlet - one of multiple spaced from each other second liquid outlets. Efficiency of liquid flow through multiple spaced first outlets can surpass those of multiple spaced from each other second liquid outlets. Placement of second liquid outlet in separate body cover is possible. First and second liquid outlets can be directed downwardly relatively to direction of mining combine displacement. Method for controlling depth of position of mining combine extraction means includes placing two liquid outlets, interacting with material extraction means, in a material, while second liquid outlet is placed above first liquid outlet, liquid is fed to first and second liquid outlets and flow and/or pressure of liquid is measured. Layer, wherein liquid outlet lies, is detected, and first liquid outlet is placed in lower layer and second liquid outlet is placed in upper layer, to determine depth of position of extraction means relatively to two layers.

EFFECT: higher precision.

2 cl, 9 dwg

FIELD: mining industry.

SUBSTANCE: device has two asynchronous electric engines, connected via reducers to drive sprockets of continuous traction chain, provided with plane carriages with their possible displacement along the guide, and hydraulic cylinders for displacing guide on pit-face. To windings of stators of first and second electric engines connected respectively are outputs of first and second frequency converters, inputs of which are connected to power grid and control inputs of which are connected respectively to outputs of first and second frequency adjusters. To frequency adjusters also connected are inputs of load detectors, to outputs of which load balancing block is connected, outputs of which are connected to inputs of first frequency adjuster. To inputs of both frequency adjusters output of load adjuster is connected, inputs of which are connected to load-setting block and load sensor for second engine. To output of second frequency converter connected are input of control block, other input of which is connected to signal block of base plant, and stator winding of third asynchronous engine, which via mechanical link is connected to first and second hydraulic pumps, having constant working volumes. Output of first hydraulic pump is connected to force hydro-main and input of second preventing hydraulic valve and to first inputs of two-position hydraulic distributors with electromagnetic control, to electromagnets of which outputs of control block are connected. Second inputs of two-positional hydraulic distributors with electromagnetic control are connected to control chambers of hydro-controlled two-positional hydro-distributors, which are part of hydro-blocks. Outputs of hydro-controlled two-positional distributors are connected to opposite hollows of volumetric dosing device of each hydro-block, and their inputs are connected respectively to outputs of hydro-distributors for controlling hydro-cylinder for moving the guide on pit-face, inputs of each of which are connected to force and drain hydro-mains, and outputs are connected to piston and rod hollows of appropriate hydro-cylinder.

EFFECT: higher efficiency.

1 dwg

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