Breakage face lining in mine

FIELD: mining.

SUBSTANCE: lining sections are connected to an expansion tensioner (ET) conveyor consisting of power cylinders. The lining is equipped with a control system performing data collection and storage and programming continuous concordance of holding force distribution along the breakage face and/or amount of holding forces along the breakage face (total holding force) and/or advancing force distribution along the breakage face at given conveyor position. It allows determining total holding force in respect to the maximum set for it, by ET number, affecting total holding force by axial force adjustment for separate ETs, or affecting total holding force depending on the position of at least one end conveyor section.

EFFECT: minimisation of expansion tensioner number and pressure feeding them at reduced cost.

9 cl, 4 dwg

 

The present invention is characterized by signs of restrictive part of paragraph 1 of the formula, it is known, for example, from the application DE 4202246 A1 (TVT 9102). This kind of support stope, or lava, consists of electric machines or plow cable drive conveyor and shields. The conveyor passes in front of the line of the face (front wastewater treatment works) and consists of a tray, or trough, in which along the face moves heavy scraper. The tray is divided into separate sections, which, being connected to each other, have the ability to move relative to each other in the direction of manufacture. Each section of the tray is connected to the shield section of the power cylinder (gidrotartrat shifting). Each shield section is used to prop up produced the lava. Each section is installed on the skis (moving base) and has a ceiling structure, propped up by the power cylinders based on the skis and supporting the roof of the reservoir.

Additionally, there are distance-tension device applied to the conveyor belt force acting at an angle to the direction of movement of the transported material. When it comes to the power cylinders, which are mounted, on the one hand, to shield, and on the other hand - to section of the tray located in front of the adjacent shield section. Thanks vysheukazannoe the e spacer-tensioner create a component of force valid towards slaughtering and referred to in this description inspiring force, and another component of the force acting in the direction of movement of the transported material and referred to in this description retaining force.

Thanks to spacer-idler device is achieved by balancing the longitudinal forces exerted on the tray, respectively on the conveyor. In this case we are talking about the forces that arise as a consequence of the material, and the slipping of the conveyor under the action of its own weight, due to the fact that the front of the treatment works, together with the plane of the material, is inclined to the horizontal throughout the length of the stope or only some parts of it. Such spacer-idler device for balancing these efforts can be provided, for example, each of the third, fourth, ... the tenth section of the lining, and will be based preferably in the following, directly adjacent shield section.

The number of spacer-idler device and fed into the pressure determined by calculation, respectively, estimate the expected effort in the longitudinal direction of the pipeline that needs to be balanced. The objective of the invention is to minimize the number of spacer-idler device and supplied to pressure to reduce the cost of systems is, this applies to capital and operating costs and to integrate spacer-idler device in the downhole equipment so that the spacer-idler device has performed a significant function during the excavation and transportation of rock and/or coal.

The solution to this problem is set out in paragraph 1 of the claims.

This solution consists in that the spacer-idler device serves not only be used statically for fastening stope, but also dynamically involved in wastewater treatment works.

To optimize capital and operating expenses necessary to limit the number of spacer-idler device to the necessary minimum. The present invention, by defining retention efforts, created a separate spacer-tensioning devices, or power cylinders, allows to determine the total holding force and calculate it in such a way that the position of the pipeline remained unchanged. A single retention efforts and total retention efforts can be made by regulating the pressure supplied to the power cylinders. On the other hand, there is also the possibility of limiting the number of spacer-idler device so that when the disposable operating pressure is and the input of a separate spacer-idler device they developed, the total holding force, the maximum required for the stability of the position of the conveyor (items 2, 3 formula).

The number of spacer-idler device must be set respectively have a maximum pressure in the system so that remained the possibility of increasing single retention efforts on the case, if it took for influencing the position of the conveyor. Therefore, in another embodiment of the invention according to paragraph 4, of the formula proposed to establish a single retention efforts, and thus the total holding force, depending on the position of at least one of the end sections of the conveyor. With this purpose, measure the position of the end portion of the conveyor in the area of the main drive and/or auxiliary drive and regulate retention efforts depending on the values obtained so that the position of the end portion of the conveyor remained largely constant, and the conveyor is not given in the passage to an invalid length.

It should be assumed that in many cases, the pipeline is laid unevenly, and the tray forms a relatively horizontal or inclined plane of elevation or depression. Such irregularities can lead to a shift in the position of one and/or another end portion of the conveyor. This shift except for the W due to what in the variant according to paragraph 5 of the claims by regulation efforts, developing spacer-tensioning devices, regulated not only the total holding force, but also the distribution of the components of the forces acting in the direction of podvigina slaughter (inspiring effort). The result is that the rock excavation is not smooth front, and with irregularities in the form of convex or concave. These irregularities sufficient to compensate and equalize changing the position of the conveyor to compensate for irregularities in the surface which supports the conveyor, and to compensate for the deviation of the position of the end sections of the conveyor, as well as the intermediate sections of the pipeline, as well as the lengthening of the pipeline and the distribution of the elongation (paragraphs 5-8 of the claims).

Conditions of excavation of rock in the lava exposed to continuous changes. Of course, one of the main reasons for this is podgey front of wastewater treatment works and following behind the front of the wastewater treatment works construction lining. Consequently, even optimally adjusted ratio of effort on the conveyor is subject to continuous changes, and over time can manifest significant interfering factors, for example, as a result of irregularities in the front of the sewage treatment works and/or on the surface on which Opera is in the pipeline.

Variant implementation of the invention according to claim 9 of the formula also takes into account the conditions, changing in this way. In particular, the force exerted spacer-tensioning devices on the conveyor in the direction of podvigina bottom and in the direction of transportation of the material, continuously consistent with the promotion of the stope and powered roof supports, in particular with the movement of the shields.

The following describes an example implementation of the invention with reference to the accompanying drawings on which is shown:

figure 1 is a view in section of stope with a shield,

figure 2 - schematic view in plan of the electric machine and a group of shields,

figure 3 - schematic view in plan of the stope with the conveyor and shields.

Figure 1 shows one of the sections 1-18 of powered roof supports. Figure 2 shows several sections 1-18 lining. Support units are located along the reservoir 20. Development of the reservoir 20 is the cutting tool 23, 24 cleaning machine 21 in the direction 22 of manufacture. In this example, the execution of the invention, the treatment machine made in the form of excavation (electric) cars 21 of the cutting action.

Extraction machine 21 can move in the direction 19 of cutting through not shown in the drawing reinforced Shearer cable. She has two cutting drum 23, 24, cuorierpostonline at different heights and cut into the coal wall, beating the coal. The broken coal is loaded excavation machine, also called treatment harvester on the conveyor. The conveyor consists of a tray 25, which is along the front of the coal face moves heavy scraper conveyor. Extraction machine 21 mounted for movement along the front of the coal face. The tray 25 is divided into separate sections, which, being connected to each other, can move relative to each other in the direction 22 of manufacture. Each section of the tray is connected with its corresponding section 1-18 supports power cylinder 29 (gidrotartrat shifting), which is an Executive body. Each of the shields can be used to mount stope. This goal is yet another of the power cylinder 30 (props), arching support and roof slabs. Roofing plate on its front, facing the reservoir end, is the so-called protivoatomnoi flap 48 (hinged shield or visor to keep the coal from the rash of the face and roof)that is designed to maintain the plane of the face. This flap can be rotated in the direction of waste coal wall. Before driving the mining machine 21 protivoatomnoi plate 48 must be removed. For this purpose, there is another power cylinder, not shown. These functional elements separate sections mechanized cu the PI presented here only as an example. There are other functional elements, but for the understanding of the invention their review and description is not required.

As mentioned above, each of the Executive departments is a hydraulic cylinder.

These cylinders are driven by the main valve 44 and the auxiliary valve 45, used for pre-amplification of the regulatory impact. On the auxiliary valve device 40 of the control valve, i.e. the case with the device control valve.

In figure 2 the mining machine shown in the process of movement to the right. So protivoatomnoi flap section 17 of the lining must be removed, i.e. folded back. On the other hand, the section of the tray 25, which is at section 9 of the lining, which is in the direction 19 movement is behind the mining machine 21, is moved forward in the direction of working of the coal wall. Also ahead, towards the bottom, respectively, to the working of the coal wall, move the subsequent sections 8, 7, 6, 5 and 4 in the liner. These shields protivoatomnoi flap back folded down. Sections 3, 2, 1 roof supports are advanced to the ready position and remain in this position until such time as the mining machine is again approaching on the right. The control of these movements is partly performed automatically, at the head of the dependence on the motion and the instantaneous position of the mining machine, and partly manually. For this purpose, with each section 1-18 lining is the appropriate unit 34 controls, functionally mated with her. For each group of sections, respectively, control units sections shield roof support is provided by the device 33 control mechanisms stope. The control unit 34 refers to one of the sections 1-18 supports and is connected with 45 auxiliary and main valves 44 all Executive bodies of the sections 1, 2, 3 ... (up to 18) lining through the appropriate device 40 control valves (microprocessor).

Each of the control units of the partition panel lining serves as the Central control device. However, a group of several control units of the sections may be subordinated to the device 33 control mechanisms stope or all control units of the sections can be controlled by the Central control device support (main 50 and/or 51 auxiliary devices centralized management)which communicates with the control units of sections. This option is shown in figure 2.

The Central control device support consists of the main 50 and 51 of the auxiliary devices centralized control.

All blocks 34 section control panel supports are interconnected by a cable 58 (electric bus). Through each of these BC the Cove management sections of the shield supports are transmitted control commands for controlling lining. The management team when referring to specific sections of the support causes a particular function, for example, in terms of discharge hydraulic rack, the movement section of the thrust section. This command is accepted and transferred further to the electrical bus 58 all the blocks 34 of the control sections of the shield supports. Any control commands issued by one of the devices 33 control mechanisms stope, immediately entered into the control unit section, directly connected with the device 33 control mechanisms stope. Then the control commands received from the control unit in this section of the shield supports for electrical bus 58 all other blocks 34 of the control sections of the shield supports. However, due to pre-coding this command activates practicing certain steps of the control unit only one of the sections 1-18 shield lining, or the control units of a certain group of sections of the shield supports. Then activated the unit control section converts the received control command in command, control valves, supplied to the control valves, respectively, the main valves serving the mechanisms of the corresponding (-) section(s) supports.

Automated calling functions and their testing process is described, for example, in the application DE-A1 19546427.3.

For tentralizovannogo the manual input command is the device 37 management made in the form of a manual remote control and carry with you the operator. To enter commands, the operator can stand outside the stope or at least away from the site of direct extraction of minerals.

It has already been mentioned that the blocks 34 of the control sections of the shield supports are interconnected by a cable 58, which in the above-described embodiments, only has two cores and is used for serial transmission of code words and control commands for mechanisms lining. In response to the received command work only those blocks 34 of the control, respectively, the partitions shield lining, for which the stored code word is identical to the transmitted codeword. Thus, the cable 58 is a two-conductor cable, laid in the form of electric bus from the control unit 34 of one section of the shield lining to the control unit of the next section and connecting with each other through adjacent blocks 34 control sections shield lining, the main 50 and 51 auxiliary devices centralized control.

Figure 3 also shows the spacer-idler device 55. Spacer-idler device 55 are power cylinders, each of which passes between the ski 54, for example, section 1 of supports and tray 25 adjacent sections of the support (in this case, the CE is tion 2). Following spacer-idler device 55 may be, for example, between the ski 54 section 5 and the tray in front of the section 6. Distribute spacer-tensioner evenly along the drifts optional. When determining the number of spacer-idler device and distribution-oriented longitudinal force acting on the tray 25 in the direction of the face. Since according to the present invention, the collection of data on retention efforts, especially data about the pressure in the cylinders, as well as data about the angles spacer-idler device relative to the direction of transportation of the material occurs continuously, along with the optimal mode of operation to achieve the optimum design spacer-idler device from the point of view of their number and size.

For reasons of saving space on Fig only schematically indicated that the management of the spacer-idler device is performed using device 56 controls. The device 56 control connected with individual blocks 57 management, each of which serves to control and measure pressure and transmits the measured data to the device 56 controls. In the area drifts 52, 53 provided by the measuring device 58. Measuring device 58 register the position of the end sections conveyer. Measurement signals from the two measuring devices 58 is sent back to the device 56 controls. Thus, the conveyor and the conveyor tray centered on the area between the roadway and do not act in one or another roadway. In the case when the measuring device is installed, the conveyor is shifted to one side or the other, holding effort increases or decreases enough to stabilize the position of the conveyor or to shift the conveyor ago.

On Fig and 3.2 shows that the spacer-tensioner due to their location at an angle to the direction of transportation of material to create one component 59 of the force in the direction of transportation of material and another component 60 force in the direction of podvigina slaughter. The number of spacer-idler device is determined based on the fact that they took acting on the tray 25 of the longitudinal force. It should be borne in mind that such longitudinal force does not have to be constant along the length of the face. On the contrary, they may change in either direction, resulting in the compression-tension of the tray. The present invention allows to collect data on the amount of retention efforts, the sum of 59 forces acting in the direction of transportation of the material, as well as the distribution of these costal the affected 59, and on the basis of data obtained by regulating the pressure to make the appropriate correction.

The invention, furthermore, allows to take into account changing components 59, 60 forces occurring during the movement of the tray, respectively, of the shields in the direction of podvigina slaughter due to the change of angle φ (angle between the axis of the piston cylinder and the direction of transportation of the material).

In addition, the invention allows to determine with the aid of the measuring device 58, the position of the end sections of the conveyor and depending on the specific provisions of these sections, which are shown in Fig by changing the pressure in a separate spacer-tension devices, manage retention efforts so that the tray and the conveyor 25 is not performed in the drifts 52, 53 respectively.

In addition, the invention eliminates the necessity of using too many stud-tensioning devices. The number of such devices it is necessary to choose so as to have the maximum pressure the system can in any case to create a holding force to maintain the conveyor tray 25 in almost a standing position. This contributes to the fact that the pressure values and their distribution can constantly measure the blocks 57 management, and how constructive is the second installation in General, and the modes of operation can be determined in accordance with the specific requirements.

Finally, the invention also allows you to influence the inspiring efforts in the direction of the component 60 strength. If, for example, measuring devices will be installed, the pipeline too stretched out, and with both sides acting drifts 52, 53, retention efforts, respectively inspiring efforts to increase and distributed along the length of the face thus to guide the development of the coal front 20 with stronger recess or bulge - see Fig. This is achieved by shortening the pipeline. In the same way can be smoothed and local stresses in the pipeline due to its compression-tension; this is achieved by the fact that at the relevant section of the coal front also change so that the conveyor is in this place was occupied by a greater or lesser length. To achieve greater local convexity of coal on the front part of the front accordingly change the distribution of pressure in the spacer-idler device.

1. Posts of the stope in the mine, including many sections that are installed next to each other along the length of the stope between the drifts, the mining machine mounted for movement along the face conveyor, passing along the length of treatment C is the battle between the mining machine and shields, and distance-tension device, consisting of actuators, each of which is mounted between the counter on one of the shields and thrust bearing on the conveyor and pivoted so that each of the spacer-tensioners its axial force created a component force acting in the direction of slaughtering (inspiring force), and a component force acting in the direction of the face (holding force) for the perception of the forces acting on the conveyor in the direction of the face, primarily to counteract the slipping of the conveyor by the action of its own weight, characterized in that it is equipped with a control system data collection, data storage and programming to continuously coordinate the distribution along the length of the stope retention efforts and/or the amount of current along the length of the stope retention efforts (total holding force) and/or the distribution along the length of the stope inspiring efforts with the specified position of the pipeline.

2. The support stope according to claim 1, characterized in that the total holding force with respect to its maximum value determined by the number of spacer-idler device.

3. The support stope according to claim 1, characterized in that the impact on total holding Wuxi is their is carried out by adjustment of the axial forces separate spacer-idler device.

4. The support stope according to any one of claims 1 to 3, characterized in that the impact on the total holding force is depending on the position of at least one of the end sections of the pipeline.

5. The support stope according to any one of claims 1 to 3, characterized in that the impact on the distribution of inspiring effort is made depending on the position of at least one of the end sections of the pipeline.

6. The support stope according to any one of claims 1 to 3, characterized in that the distribution inspiring efforts will agree with the roughness of the surface on which rests the pipeline.

7. The support stope according to any one of claims 1 to 3, characterized in that the distribution inspiring efforts will coordinate with necessary adjustments on the position of the pipeline.

8. The support stope according to any one of claims 1 to 3, characterized in that the distribution inspiring efforts will agree with elongation and/or distribution of lengthening the pipeline.

9. The support stope according to any one of claims 1 to 3, characterized in that is provided by the measurement of axial force to the spacer-idler device with the definition of the angular position of the respective spacer-idler device relative to the direction of the shaft and the determination of the angular position of the separate spacer-idler device relative to the direction of the face, and the collection and the retention of relevant data, allows you to determine the actual retention efforts and their distribution along the length of the stope and/or the actual inspiring efforts and their distribution along the length of the stope and to align them with the position of the pipeline.

Priority items:

17.12.2002 according to claims 1-9.



 

Same patents:

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FIELD: mining industry.

SUBSTANCE: method for extraction and underground use of coal includes cleaning extraction and dumping of coal, fixing and controlling ceiling and transporting coal along face to drift. On the drift, in moveable generator, coal is pulverized for intensive burning with use of jets in water boiler firebox, where high temperature of steam is achieved (about 1400 C), enough for decomposition of water on oxygen and hydrogen. These are separated, then oxygen is fed back to jets, and hydrogen is outputted along pipes and hoses in drifts and shaft. Variants of underground generator for realization of this method are provided. Also provided is method for extraction of disturbed coal beds by short faces. It includes extraction and dumping of coal on face conveyor, fixing of ceiling behind combine, moving conveyor line and support sections in direction of cleaning face displacement, control of ceiling with destruction and partial filling. Extraction of coal is performed in short curvilinear faces by long stripes along bed, in straight drive without forwarding drifts, with preservation and reuse of ventilation and conveyor drifts, equipped with mounting manipulator robots, with fixing behind combine by automatically operating support deflectors without unloading and displacing sections in area of coal extraction. Extraction and transporting of coal is performed by fast one-drum combine and curvilinear reloading conveyor, supplying coal to drift conveyor or immediately to underground gas or energy generator placed immediately on drift. Also proposed is face scraper conveyor for realization of said method, wherein pans are made with step along front face profile, greater, than along back one, while forming common line curved towards face with constant curvature. Also proposed is a method for controlling complex for unmanned coal extraction.

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