Continuous coal mining equipment for strip mine

Abstract

The continuous coal mining equipment for the strip mine comprises a double-drum coal mining machine, a scraper conveyor, a scraper conveyor pushing executing mechanism, a scraper conveyor auxiliary pushing vehicle, a reversed loader, a movable crushing station and a belt conveyor, the scraper conveyor is arranged along a coal face of an open coal seam; the double-drum coal mining machine is arranged above the scraper conveyer, and the double-drum coal mining machine has a moving freedom degree along the scraper conveyer; the scraper conveyor pushing executing mechanism and the scraper conveyor are distributed in parallel; the auxiliary pushing trolley of the scraper conveyor is used in cooperation with a pushing executing mechanism of the scraper conveyor. And the scraper conveyor, the reversed loader, the movable crushing station and the belt conveyor are connected in sequence. The continuous coal mining process method for the strip mine comprises the steps that the double-drum coal mining machine moves back and forth between the feeding end and the discharging end of the scraper conveyor, the scraper conveyor integrally completes one-time pushing every time the double-drum coal mining machine moves in one direction along the scraper conveyor, and continuous mining of an open coal seam is achieved by repeating the steps.

Description

Technical Field

[0001] The utility model belongs to the technical field of open-pit coal mining, and particularly relates to a continuous coal mining equipment for open-pit mines. Background Art

[0002] Open-pit coal mining is a coal mining method carried out on the surface, usually applicable to the situation where the coal seam is relatively shallow. At present, according to different specific coal mine geological conditions, coal reserves and coal mining requirements, open-pit coal mining usually adopts the excavation and loading method, blasting method, water coal slurry method and tunneling method.

[0003] For open-pit mines with relatively thick coal seams, large mechanized equipment such as electric shovels and bucket-wheel excavators are usually used for coal mining, but the efficiency is relatively low and the mining continuity is poor; for open-pit mines with relatively thin coal seams, there is still a lack of suitable coal mining equipment and process methods at present Content of the Utility Model

[0004] Aiming at the problems existing in the prior art, the utility model provides a continuous coal mining equipment for open-pit mines, which can meet the needs of coal mining in both thin coal seam and thick coal seam open-pit mines, and has the characteristics of high mobility and flexibility and can realize efficient continuous mining.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: A continuous coal mining equipment for open-pit mines includes a double-drum shearer, a scraper conveyor, a scraper conveyor pushing execution mechanism, a scraper conveyor auxiliary pusher, a transfer machine, a mobile crusher and a belt conveyor; the scraper conveyor is arranged along the coal mining face of the open-pit coal seam; the double-drum shearer is arranged above the scraper conveyor, and the double-drum shearer has a moving freedom along the scraper conveyor; the scraper conveyor pushing execution mechanism is distributed side by side with the scraper conveyor; the scraper conveyor auxiliary pusher is used in cooperation with the scraper conveyor pushing execution mechanism; the feeding end of the transfer machine is connected to the discharging end of the scraper conveyor, the discharging end of the transfer machine is connected to the feeding end of the mobile crusher, and the discharging end of the mobile crusher is connected to the feeding end of the belt conveyor.

[0006] A first coal falling auxiliary scraper is arranged between the feeding end of the scraper conveyor and the side wall of the open-pit coal seam, and a second coal falling auxiliary scraper is arranged between the discharging end of the scraper conveyor and the side wall of the open-pit coal seam.

[0007] The scraper conveyor pushing execution mechanism includes a pushing oil cylinder and a support base; the number of pushing oil cylinders is the same as that of the middle troughs of the scraper conveyor, and each pushing oil cylinder is provided with a support base; one end of the pushing oil cylinder is hinged to the corresponding middle trough of the scraper conveyor, and the other end of the pushing oil cylinder is hinged to the supporting base matched with it.

[0008] The auxiliary pushing vehicle for the scraper conveyor includes a crawler walking mechanism, a vehicle body, a cab, a guiding walking wheel and a hydraulic jacking mechanism; the vehicle body is arranged above the crawler walking mechanism; the cab is arranged above the vehicle body; the guiding walking wheel is arranged at the bottom of the vehicle body, and the guiding walking wheel is arranged side by side with the crawler walking mechanism; a guide rail is fixedly installed above the support base, and the guiding walking wheel is used in cooperation with the guide rail; the hydraulic jacking mechanism is arranged at the bottom of the vehicle body, and the hydraulic jacking mechanism is used in cooperation with the support base.

[0009] The hydraulic jacking mechanism includes a hydraulic jacking oil cylinder and a jacking chuck; the hydraulic jacking oil cylinder is arranged vertically, the upper end of the hydraulic jacking oil cylinder is connected with the bottom of the vehicle body, and the jacking chuck is connected to the lower end of the hydraulic jacking oil cylinder; a jacking socket is arranged on the upper surface of the support base, and the jacking socket is in plug-in fit with the jacking chuck.

[0010] A hydraulic auxiliary stabilizing support mechanism is arranged on the side of the crawler walking mechanism, and the hydraulic auxiliary stabilizing support mechanism and the hydraulic jacking mechanism are respectively located on the left and right sides of the crawler walking mechanism; the number of the hydraulic auxiliary stabilizing support mechanisms is several and they are distributed at equal intervals along a straight line.

[0011] The hydraulic auxiliary stabilizing support mechanism includes a support bottom plate, a support leg and a support oil cylinder; the support bottom plate is fixedly installed on the crawler walking mechanism; one end of the support leg is hinged to the support bottom plate, and the other end of the support leg is a free end; one end of the support oil cylinder is hinged to the support bottom plate, and the other end of the support oil cylinder is hinged to the support leg.

[0012] An arm-type bucket mechanism is arranged above the vehicle body, and the arm-type bucket mechanism is arranged side by side with the cab, and the transfer of the crushed coal body to the scraper conveyor is assisted by the arm-type bucket mechanism.

[0013] An open-pit continuous coal mining process method adopts the open-pit continuous coal mining equipment as described above, and includes the following steps:

[0014] Step 1: Starting from the side surface of the open-pit coal seam on the same side as the feeding end of the scraper conveyor, the double-drum shearer uses the end oblique cutting method to start crushing the coal mining face of the open-pit coal seam.

[0015] Step 2: The side surface of the open-pit coal seam on the same side as the feeding end of the scraper conveyor first generates crushed coal bodies, and these crushed coal bodies are collected and shoveled by the first coal falling auxiliary loader, and then the crushed coal bodies are transported onto the scraper conveyor.

[0016] Step 3: As the double-drum shearer moves along the scraper conveyor, the coal mining face of the open-pit coal seam continuously generates crushed coal bodies, and these crushed coal bodies will directly fall onto the lower scraper conveyor.

[0017] Step 4: Transfer the broken coal on it to the loader conveyor through the scraper conveyor;

[0018] Step 5: Transfer the broken coal on it to the mobile crusher through the loader conveyor, and crush the broken coal through the mobile crusher to further reduce the particle size of the broken coal;

[0019] Step 6: The crushed broken coal is transferred from the mobile crusher to the belt conveyor, and the belt conveyor transfers the broken coal out of the stope;

[0020] Step 7: For the open-pit coal seam coal mining face that has completed mining, the scraper conveyor is pushed by the cooperation of the scraper conveyor pushing actuator and the scraper conveyor auxiliary pusher;

[0021] Step 8: Taking the side surface of the open-pit coal seam on the same side as the discharge end of the scraper conveyor as the end point, until the double-drum shearer completes all the crushing tasks of the coal mining face, and the broken coal at the side surface of the open-pit coal seam is collected and shoveled by the second coal falling auxiliary loader, and then the broken coal is transported onto the scraper conveyor;

[0022] Step 9: Taking the side surface of the open-pit coal seam on the same side as the discharge end of the scraper conveyor as the starting point, the double-drum shearer starts to crush the newly formed open-pit coal seam coal mining face by using the end oblique cutting method;

[0023] Step 10: The double-drum shearer moves back and forth between the feed end and the discharge end of the scraper conveyor. For each one-way movement of the double-drum shearer along the scraper conveyor, the entire scraper conveyor completes one push, and so on in a cycle to achieve continuous mining of the open-pit coal seam.

[0024] The pushing process of the scraper conveyor is as follows:

[0025] Step ①: Move the scraper conveyor auxiliary pusher to the side of the middle trough of the scraper conveyor that needs to be pushed, and then control the support cylinder of the hydraulic auxiliary stable support mechanism to extend until the free end of the support leg abuts against the ground;

[0026] Step ②: Control the hydraulic jacking cylinder of the hydraulic jacking mechanism to extend until the jacking chuck is inserted into the jacking socket on the upper surface of the support base to complete the limit fixation of the support base and the scraper conveyor auxiliary pusher;

[0027] Step ③: Control the pushing cylinder of the scraper conveyor pushing actuator to extend, and push the middle trough of the scraper conveyor connected to it forward until the pushing distance of the middle trough of the scraper conveyor reaches the set value;

[0028] Step ④: Control the hydraulic cylinder of the hydraulic jacking mechanism to retract until the jacking chuck disengages from the jacking socket on the upper surface of the support base and returns to the initial position, releasing the limit fixation between the support base and the auxiliary scraper conveyor pusher vehicle;

[0029] Step ⑤: Control the support cylinder of the hydraulic auxiliary stable support mechanism to retract until the free end of the support leg lifts off the ground to the initial position;

[0030] Step ⑥: Repeat steps ① to ⑤ until the pushing of all the intermediate troughs of the scraper conveyor is completed.

[0031] Advantages of the present utility model:

[0032] The continuous coal mining equipment for open-pit mines of the present utility model can meet the needs of coal mine exploitation in both thin coal seams and thick coal seams of open-pit mines. It realizes the pushing of the scraper conveyor and the double-drum shearer without the support and jacking of hydraulic supports, achieves efficient continuous mining, simplifies the mining steps of open-pit coal mines, realizes full-process coherent operation, effectively solves the problems existing in the traditional mining method such as high labor intensity, numerous equipment, high mining cost, and low mining efficiency, and promotes the further transformation of open-pit mines towards mechanized and efficient mining. Description of the drawings

[0033] Figure 1 It is a schematic structural diagram (viewpoint one) of a continuous coal mining equipment for open-pit mines of the present utility model;

[0034] Figure 2 It is a schematic structural diagram (viewpoint two) of a continuous coal mining equipment for open-pit mines of the present utility model;

[0035] Figure 3 It is a schematic structural diagram of the scraper conveyor pushing execution mechanism of the present utility model;

[0036] Figure 4 It is a schematic structural diagram (viewpoint one) of the auxiliary scraper conveyor pusher vehicle of the present utility model;

[0037] Figure 5 It is a schematic structural diagram (viewpoint two) of the auxiliary scraper conveyor pusher vehicle of the present utility model;

[0038] Figure 6 It is a schematic structural diagram of the hydraulic jacking mechanism of the present utility model;

[0039] Figure 7 It is a schematic structural diagram of the hydraulic auxiliary stable support mechanism of the present utility model;

[0040] In the figure, 1 is a double-drum shearer, 2 is a scraper conveyor, 3 is a scraper conveyor pushing actuator, 4 is a scraper conveyor auxiliary pusher, 5 is a transfer machine, 6 is a mobile crusher, 7 is a belt conveyor, 8 is an open-pit coal seam, 9 is a first coal-loading auxiliary scraper, 10 is a second coal-loading auxiliary scraper, 11 is a pushing oil cylinder, 12 is a support base, 13 is a crawler-type traveling mechanism, 14 is a vehicle body, 15 is a cab, 16 is a guiding traveling wheel, 17 is a hydraulic clamping mechanism, 18 is a hydraulic clamping oil cylinder, 19 is a clamping chuck, 20 is a clamping socket, 21 is a hydraulic auxiliary stabilizing support mechanism, 22 is a support bottom plate, 23 is a support leg, 24 is a support oil cylinder, and 25 is an articulated bucket mechanism. Detailed implementation mode

[0041] The present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] As Figures 1 to 7 shown, a continuous coal mining equipment for open-pit mines includes a double-drum shearer 1, a scraper conveyor 2, a scraper conveyor pushing actuator 3, a scraper conveyor auxiliary pusher 4, a transfer machine 5, a mobile crusher 6, and a belt conveyor 7; the scraper conveyor 2 is arranged along the coal mining face of the open-pit coal seam 8; the double-drum shearer 1 is arranged above the scraper conveyor 2, and the double-drum shearer 1 has a moving freedom degree along the scraper conveyor 2; the scraper conveyor pushing actuator 3 and the scraper conveyor 2 are arranged side by side; the scraper conveyor auxiliary pusher 4 is used in cooperation with the scraper conveyor pushing actuator 3; the feeding end of the transfer machine 5 is connected to the discharging end of the scraper conveyor 2, the discharging end of the transfer machine 5 is connected to the feeding end of the mobile crusher 6, and the discharging end of the mobile crusher 6 is connected to the feeding end of the belt conveyor 7.

[0043] A first coal-loading auxiliary scraper 9 is arranged between the feeding end of the scraper conveyor 2 and the side wall surface of the open-pit coal seam 8, and a second coal-loading auxiliary scraper 10 is arranged between the discharging end of the scraper conveyor 2 and the side wall surface of the open-pit coal seam 8.

[0044] The scraper conveyor pushing actuator 3 includes a pushing oil cylinder 11 and a support base 12; the number of pushing oil cylinders 11 is the same as that of the middle troughs of the scraper conveyor 2, and each pushing oil cylinder 11 is provided with a support base 12; one end of the pushing oil cylinder 11 is hinged to the corresponding middle trough of the scraper conveyor 2, and the other end of the pushing oil cylinder 11 is hinged to the supporting base 12 that is used in cooperation with it.

[0045] The auxiliary scraper conveyor pusher 4 includes a crawler traveling mechanism 13, a vehicle body 14, a cab 15, a guiding traveling wheel 16, and a hydraulic jacking mechanism 17. The vehicle body 14 is arranged above the crawler traveling mechanism 13. The cab 15 is arranged above the vehicle body 14. The guiding traveling wheel 16 is arranged at the bottom of the vehicle body 14 and is arranged in parallel with the crawler traveling mechanism 13. A guide rail 18 is fixedly installed above the support base 12, and the guiding traveling wheel 16 is used in cooperation with the guide rail 18. The hydraulic jacking mechanism 17 is arranged at the bottom of the vehicle body 14 and is used in cooperation with the support base 12.

[0046] The hydraulic jacking mechanism 17 includes a hydraulic jacking oil cylinder 18 and a jacking chuck 19. The hydraulic jacking oil cylinder 18 is arranged vertically, the upper end of the hydraulic jacking oil cylinder 18 is connected to the bottom of the vehicle body 14, and the jacking chuck 19 is connected to the lower end of the hydraulic jacking oil cylinder 18. A jacking socket 20 is arranged on the upper surface of the support base 12, and the jacking socket 20 is inserted and matched with the jacking chuck 19.

[0047] A hydraulic auxiliary stabilizing support mechanism 21 is arranged on the side of the crawler traveling mechanism 13. The hydraulic auxiliary stabilizing support mechanism 21 and the hydraulic jacking mechanism 17 are respectively located on the left and right sides of the crawler traveling mechanism 13. The number of the hydraulic auxiliary stabilizing support mechanisms 21 is several and they are distributed at equal intervals along a straight line.

[0048] The hydraulic auxiliary stabilizing support mechanism 21 includes a support bottom plate 22, a support leg 23, and a support oil cylinder 24. The support bottom plate 22 is fixedly installed on the crawler traveling mechanism 13. One end of the support leg 23 is hinged to the support bottom plate 22, and the other end of the support leg 23 is a free end. One end of the support oil cylinder 24 is hinged to the support bottom plate 22, and the other end of the support oil cylinder 24 is hinged to the support leg 23.

[0049] An articulated bucket mechanism 25 is arranged above the vehicle body 14. The articulated bucket mechanism 25 is arranged in parallel with the cab 15, and the transfer of the crushed coal body to the scraper conveyor 2 is assisted by the articulated bucket mechanism 25.

[0050] An open-pit continuous coal mining process method uses the open-pit continuous coal mining equipment described above and includes the following steps:

[0051] Step 1: Starting from the side surface of the open-pit coal seam 8 on the same side as the feeding end of the scraper conveyor 2, the double-drum shearer 1 uses the end oblique cutting method to start crushing the coal mining face of the open-pit coal seam 8.

[0052] Step 2: The broken coal body is first generated on the side surface of the open-pit coal seam 8 on the same side as the feeding end of the scraper conveyor 2. The broken coal body is collected and shoveled by the first coal falling auxiliary loader 9, and then the broken coal body is transported onto the scraper conveyor 2.

[0053] Step 3: As the double-drum shearer 1 moves along the scraper conveyor 2, broken coal bodies are continuously generated at the open-pit coal seam 8 coal mining face, and these broken coal bodies will directly fall onto the scraper conveyor 2 below;

[0054] Step 4: Transfer the broken coal bodies on it to the transfer machine 5 through the scraper conveyor 2;

[0055] Step 5: Transfer the broken coal bodies on it to the mobile crushing station 6 through the transfer machine 5, and crush the broken coal bodies through the mobile crushing station 6 to further reduce the particle size of the broken coal bodies;

[0056] Step 6: The crushed broken coal bodies are transferred from the mobile crushing station 6 to the belt conveyor 7, and the belt conveyor 7 transfers the broken coal bodies out of the stope;

[0057] Step 7: For the open-pit coal seam 8 coal mining face that has completed mining, the scraper conveyor pushing actuator 3 and the scraper conveyor auxiliary pusher 4 cooperate to complete the pushing of the scraper conveyor 2;

[0058] The pushing process of the scraper conveyor 2 is as follows:

[0059] Step ①: Move the scraper conveyor auxiliary pusher 4 to the side of the middle trough of the scraper conveyor 2 that needs to be pushed, and then control the support cylinder 24 of the hydraulic auxiliary stable support mechanism 21 to extend until the free end of the support leg 23 abuts against the ground;

[0060] Step ②: Control the hydraulic jacking cylinder 18 of the hydraulic jacking mechanism 17 to extend until the jacking chuck 19 is inserted into the jacking socket 20 on the upper surface of the support base 12 to complete the limit fixation between the support base 12 and the scraper conveyor auxiliary pusher 4;

[0061] Step ③: Control the pushing cylinder 11 of the scraper conveyor pushing actuator 3 to extend, and push the middle trough of the connected scraper conveyor 2 forward until the pushing distance of the middle trough of the scraper conveyor 2 reaches the set value;

[0062] Step ④: Control the hydraulic jacking cylinder 18 of the hydraulic jacking mechanism 17 to retract until the jacking chuck 19 disengages from the jacking socket 20 on the upper surface of the support base 12 and returns to the initial position, releasing the limit fixation between the support base 12 and the scraper conveyor auxiliary pusher 4;

[0063] Step ⑤: Control the support cylinder 24 of the hydraulic auxiliary stable support mechanism 21 to retract until the free end of the support leg 23 is lifted off the ground to the initial position;

[0064] Step ⑥: Repeat steps ① to ⑤ until the pushing of all middle troughs of the scraper conveyor 2 is completed;

[0065] Step Eight: Take the side face of the open-pit coal seam 8 on the same side as the discharge end of the scraper conveyor 2 as the end point until the double-drum shearer 1 completes all the fragmentation tasks of the coal mining face, and the fragmented coal mass at the side face of the open-pit coal seam 8 is collected and shoveled by the second coal falling and auxiliary scraper 10, and then the fragmented coal mass is transported onto the scraper conveyor 2;

[0066] Step Nine: Take the side face of the open-pit coal seam 8 on the same side as the discharge end of the scraper conveyor 2 as the starting point, and the double-drum shearer 1 starts to fragment the newly formed coal mining face of the open-pit coal seam 8 by using the end oblique cutting method;

[0067] Step Ten: The double-drum shearer 1 moves back and forth between the feeding end and the discharge end of the scraper conveyor 2. For each one-way movement of the double-drum shearer 1 along the scraper conveyor 2, the entire scraper conveyor 2 completes one push. By repeating this cycle, continuous mining of the open-pit coal seam 8 is achieved.

[0068] The solutions in the embodiments are not intended to limit the protection scope of the present invention. Any equivalent implementation or modification without departing from the present invention is included in the protection scope of the present invention.

Claims

1. A continuous coal mining equipment for open-pit mines, characterized by: It includes a double-drum coal mining machine, a scraper conveyor, a scraper conveyor pushing actuator, a scraper conveyor auxiliary pushing vehicle, a transfer machine, a mobile crushing station and a belt conveyor; the scraper conveyor is arranged along the coal mining face of the open-pit coal seam; the double-drum coal mining machine is arranged above the scraper conveyor, and the double-drum coal mining machine has the freedom of movement along the scraper conveyor; the scraper conveyor pushing actuator is distributed in parallel with the scraper conveyor; the scraper conveyor auxiliary pushing vehicle is used in conjunction with the scraper conveyor pushing actuator; the feed end of the transfer machine is connected to the discharge end of the scraper conveyor, the discharge end of the transfer machine is connected to the feed end of the mobile crushing station, and the discharge end of the mobile crushing station is connected to the feed end of the belt conveyor.

2. The open-pit continuous coal mining equipment according to claim 1, characterized in that: A first coal-dropping auxiliary scraper is arranged between the feeding end of the scraper conveyor and the side surface of the open-pit coal seam, and a second coal-dropping auxiliary scraper is arranged between the discharging end of the scraper conveyor and the side surface of the open-pit coal seam.

3. The open-pit continuous coal mining equipment according to claim 2, characterized in that: The scraper conveyor pushing actuator includes a pushing cylinder and a supporting base; the number of the pushing cylinders is the same as the middle groove of the scraper conveyor, and each pushing cylinder is equipped with a supporting base; one end of the pushing cylinder is hinged to the corresponding middle groove of the scraper conveyor, and the other end of the pushing cylinder is hinged to the supporting base matched with it.

4. The open-pit continuous coal mining equipment according to claim 3, characterized in that: The scraper conveyor auxiliary push vehicle includes a crawler traveling mechanism, a vehicle body, a cab, guide walking wheels and a hydraulic jacking mechanism; the vehicle body is arranged above the crawler traveling mechanism; the cab is arranged above the vehicle body; the guide walking wheels are arranged at the bottom of the vehicle body, and the guide walking wheels and the crawler traveling mechanism are arranged in parallel; a guide rail is fixedly installed above the support base, and the guide walking wheels are used in conjunction with the guide rail; the hydraulic jacking mechanism is arranged at the bottom of the vehicle body, and the hydraulic jacking mechanism is used in conjunction with the support base.

5. The open-pit continuous coal mining equipment according to claim 4, characterized in that: The hydraulic jacking mechanism includes a hydraulic jacking cylinder and a jacking chuck; the hydraulic jacking cylinder is vertically arranged, the upper end of the hydraulic jacking cylinder is connected to the bottom of the vehicle body, and the jacking chuck is connected to the lower end of the hydraulic jacking cylinder; a jacking socket is arranged on the upper surface of the support base, and the jacking socket is plugged and matched with the jacking chuck.

6. The open-pit continuous coal mining equipment according to claim 5, characterized in that: A hydraulic auxiliary stabilizing support mechanism is arranged on the side of the crawler traveling mechanism, and the hydraulic auxiliary stabilizing support mechanism and the hydraulic jacking mechanism are respectively located on the left and right sides of the crawler traveling mechanism; the hydraulic auxiliary stabilizing support mechanisms are in a plurality and are evenly spaced along a straight line.

7. The open-pit continuous coal mining equipment according to claim 6, characterized in that: The hydraulically assisted stable support mechanism includes a support base plate, a support leg and a support cylinder; the support base plate is fixedly mounted on the crawler walking mechanism; one end of the support leg is hinged to the support base plate, and the other end of the support leg is a free end; one end of the support cylinder is hinged to the support base plate, and the other end of the support cylinder is hinged to the support leg.

8. The open-pit continuous coal mining equipment according to claim 4, characterized in that: An arm-type bucket mechanism is arranged above the vehicle body and is arranged in parallel with the cab. The arm-type bucket mechanism assists in transferring the crushed coal body to the scraper conveyor.

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