An underground triangular coal extreme negative pseudo-inclined mining device

Abstract

An underground triangular coal extreme negative pseudo-inclined mining device, wherein a bottom plate is provided at the bottom of the hydraulic support, the bottom plate is arranged on the working surface, the other end of the hydraulic support supports a scraper conveyor, a coal mining machine is arranged on the scraper conveyor, one end of the scraper conveyor is connected to one end of a telescopic conveyor, a transfer machine is installed at a point on the telescopic conveyor, a crusher is arranged on the telescopic conveyor, the crusher is located at the downstream position of the transfer machine, and the bottom end of the telescopic conveyor is connected to a coal collection port; an emulsion pump is provided on the hydraulic support; a push rod is provided on the hydraulic support, and the top end of the push rod is movably connected to the bottom of the scraper conveyor; the device can efficiently and safely recover triangular coal, save energy, increase the safety of the production process, and improve mining efficiency and reduce production costs.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining equipment, in particular to an underground triangular coal extreme negative pseudo-inclined mining device. Background Art

[0002] At present, in the process of adjusting the traditional comprehensive mining working face from the positive pseudo-inclination state to the zero pseudo-inclination state and then to the negative pseudo-inclination state, the length of the working face first decreases and then increases, and the number of scraper conveyors and supports decreases from many to few and then gradually increases. The process is frequently adjusted, and the quality of equipment and working face engineering is difficult to control. In addition, the sliding of the scraper conveyor on the working face is inevitable. Improper control will cause coal accumulation at the head of the machine, and even cause the head of the scraper conveyor to be on the lower side of the transport chute, affecting the normal mining of the working face.

[0003] Therefore, there is an urgent need for an underground triangular coal extreme negative pseudo-inclined mining device that can efficiently and safely recover triangular coal, save energy, increase the safety of the production process, improve mining efficiency, and reduce production costs. Summary of the invention

[0004] The invention discloses an underground triangular coal extreme negative pseudo-inclined mining device, which can efficiently and safely recover triangular coal, save energy, increase the safety of the production process, improve mining efficiency and reduce production costs.

[0005] An underground triangular coal extreme negative pseudo-inclined mining device comprises a hydraulic support, a scraper conveyor, a transfer machine and a crusher, wherein:

[0006] A bottom plate is provided at the bottom of the hydraulic support, and the bottom plate is arranged above the working surface. The other end of the hydraulic support supports a scraper conveyor. A coal mining machine is arranged on the scraper conveyor. One end of the scraper conveyor is connected to one end of the telescopic conveyor. The transfer machine is installed at a place on the telescopic conveyor. The crusher is arranged on the telescopic conveyor. The crusher is located downstream of the transfer machine. The bottom end of the telescopic conveyor is connected to the coal collection port.

[0007] Preferably, the hydraulic support is provided with an emulsion pump.

[0008] Preferably, a push rod is provided on the hydraulic support, and the top end of the push rod is movably connected to the bottom of the scraper conveyor.

[0009] Preferably, the hydraulic support is provided with a single pillar, one end of which is provided with a connecting rope, the other end of which is connected to the scraper conveyor base, the top end of the single pillar contacts the scraper conveyor base and is pressed against the top position of one side of the previous push rod.

[0010] Preferably, a transport chute is provided downstream of the telescopic conveyor, and the transport chute is fixed on the working transport surface.

[0011] Preferably, the single body support is made of high-strength alloy steel.

[0012] Preferably, a dust removal bag is provided on the coal collection port.

[0013] Preferably, the extension and retraction of the hydraulic support is controlled by a hydraulic system, and the hydraulic system includes a sensor, an actuator and a controller, and the controller is arranged in a control room of the coal mining machine.

[0014] Preferably, the hydraulic system uses a programmable logic controller as a core control unit.

[0015] Beneficial effects of the utility model: In the underground triangular coal extreme negative pseudo-inclined mining device of the utility model, the hydraulic support has the function of adjusting the height, which can be adjusted according to the thickness of the coal seam and the coal mining process requirements to ensure the stable operation of the scraper conveyor. The hydraulic support is equipped with a control system to realize automatic operation and improve the mining efficiency and safety. The bottom plate of the device is set downstream of the coal seam mining working face and fixed on the ground; the support is set on the bottom plate and has sufficient bearing capacity to support the operation of the scraper conveyor; it improves the mining efficiency and safety, improves the equipment utilization rate and reduces the production cost, and greatly enhances its practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an underground triangular coal extreme negative pseudo-inclined mining device according to the utility model.

[0017] In the figure: hydraulic support 1, bottom plate 2, scraper conveyor 3, coal mining machine 4, telescopic conveyor 5, transfer machine 6, crusher 7, coal collection port 8, push rod 9, single support 10, transport chute 11. DETAILED DESCRIPTION

[0018] In order to make the technical solution of the present utility model easier to understand, the technical solution of the present utility model is now clearly and completely described in the form of specific embodiments in combination with the accompanying drawings.

[0019] Embodiment 1:

[0020] like Figure 1 As shown, in this embodiment Figure 1 The utility model is an underground triangular coal extreme negative pseudo-inclined mining device, comprising a hydraulic support 1, a scraper conveyor 3, a transfer machine 6 and a crusher 7, wherein:

[0021] A bottom plate 2 is provided at the bottom of the hydraulic support 1, and the bottom plate 2 is arranged on the working surface. The other end of the hydraulic support 1 supports a scraper conveyor 3, and a coal mining machine 4 is arranged on the scraper conveyor 3. One end of the scraper conveyor 3 is connected to one end of a telescopic conveyor 5, and a transfer machine 6 is installed at a place on the telescopic conveyor 5. A crusher 7 is arranged on the telescopic conveyor 5, and the crusher 7 is located at the downstream position of the transfer machine 6. The bottom end of the telescopic conveyor 5 is connected to a coal collection port 8.

[0022] The hydraulic support 1 is provided with an emulsion pump.

[0023] The hydraulic support 1 is provided with a push rod 9 , the top end of which is movably connected to the bottom of the scraper conveyor 3 .

[0024] The hydraulic support 1 is provided with a single pillar 10, one end of which is provided with a connecting rope, the other end of which is connected to the base of the scraper conveyor 3, and the top of the single pillar 10 contacts and connects the base of the scraper conveyor 3 and the top position of the upper push rod 9.

[0025] A transport chute 11 is provided downstream of the telescopic conveyor 5 , and the transport chute 11 is fixed on the working transport surface.

[0026] The single support column 10 is made of high-strength alloy steel.

[0027] The coal collecting port 8 is provided with a dust removal bag.

[0028] The extension and retraction of the hydraulic support 1 is controlled by a hydraulic system. The hydraulic system includes a sensor, an actuator and a controller. The controller is arranged in a control room of the coal mining machine 4 .

[0029] The hydraulic system adopts a programmable logic controller as a core control unit.

[0030] During the production process of this device, according to the geological conditions of the working face and the occurrence of coal seams, since the head of the scraper conveyor 3 is close to the fault and the joints near the fault are developed, it is not conducive to roof control. It is necessary to adopt the method of fixing the head of the scraper conveyor 3 or advancing less, and the tail of the scraper conveyor 3 advancing more for mining. There are generally two methods for adjusting pseudo-inclined mining: real center point adjustment method and virtual center point adjustment method. Combined with the situation of this working face, the virtual center point adjustment method is used this time.

[0031] After the negative pseudo-inclination adjustment of the working face, the head of the scraper conveyor 3 advanced 14.5m, and the tail of the scraper conveyor 3 finally advanced 100.8m. The original design of the working face at the stop mining line was 230.1m in length. After the negative pseudo-inclination mining, the working face was 252.5m in length, and the working face was extended by 22.4m.

[0032] The hydraulic support 1 of the working face is divided into 4 groups. During mining, the number of feeds in the cycle is 4 times, and the feed method of "small angle covering large angle" is adopted. The small knife is fed 3 times in the cycle, and then the through knife is passed once.

[0033] The specific steps are: the first time the knife is inserted, the tail of the coal mining machine 4 cuts the coal downward to the hydraulic support 1, and then the empty machine returns to the tail of the coal mining machine 4. When the coal mining machine 4 returns upward, the coal wall is cut through after all the chutes of the hydraulic supports 1 are pushed, and then the remaining hydraulic supports 1 and chutes are pushed into place;

[0034] The second time the knife is inserted, the tail of the coal mining machine 4 cuts the coal downward to the hydraulic support 1, and then the machine returns to the tail of the coal mining machine 4 empty. When the coal mining machine 4 returns upward, it cuts through the coal wall after all the chutes of the hydraulic support 1 are pushed, and then the remaining hydraulic supports 1 and chutes are pushed into place;

[0035] The third time the knife is inserted, the tail of the coal mining machine 4 cuts the coal obliquely downward to the hydraulic support 1, and then the machine returns empty to the tail of the scraping coal mining machine 4. When the coal mining machine 4 returns upward, it cuts through the coal wall after all the chutes of the hydraulic support 1 are pushed, and then the remaining hydraulic supports 1 and chutes are pushed into place;

[0036] The fourth pass, the tail of the coal mining machine 4 cuts obliquely and cuts the coal downward to the hydraulic support 1 to cut through the coal wall of the head of the coal mining machine 4, and then the empty machine returns to the tail of the coal mining machine 4. When the coal mining machine 4 returns upward, it cuts through the coal wall after all the chutes of the hydraulic support 1 are pushed, and then the remaining hydraulic supports 1 and chutes are pushed into place. Then the tail of the coal mining machine 4 cuts obliquely and cuts to the hydraulic support 1 to prepare for the next cycle. During the whole process, the working surface must be straightened by hanging wires section by section to ensure the quality of the project.

[0037] During negative pseudo-inclined mining, the hydraulic support 1 and the scraper conveying state are adjusted to reduce the downward movement of the scraper conveyor 3. The specific method is: adjust the hydraulic support 1 to "upward swing head", so that the lower column of the support is ahead of the upper column of the support, the push rod 9 is biased toward the tail of the scraper conveyor 3, and the angle between the push rod 9 and the normal line of the coal wall is 10°. During the entire mining process, ensure that the initial support force of the single pillar 10 meets the requirements, so that all single pillars 10 stand upright and offset part of the downward force.

[0038] Considering the reasonable overlap between the scraper conveyor 3 and the transfer machine 6, there will be a height difference between the hydraulic support 1 and the bottom plate of the transport chute 11. As the working surface continues to advance, the scraper conveyor 3 and the hydraulic support 1 will slide down, and the hydraulic support 1 may fall over. Anti-falling jacks are installed on different groups of hydraulic supports 1 to prevent the occurrence of falling over.

[0039] Considering that the position of the working face head is greatly affected by the sliding force of the scraper conveyor 3 and the hydraulic support 1, a number of single pillars 10 are arranged between the hydraulic support 1 push box and the scraper conveyor 3 chute. The tail of the single pillar 10 is at the angle between the push rod 9 and the base, and the head is at the angle between the base of the scraper conveyor 3 and the previous push rod 9. The single pillar 10 remotely supplies liquid to give the scraper conveyor 3 a reaction force to reduce the sliding speed of the scraper conveyor 3.

[0040] Affected by geological factors, the geological conditions of mines are complex and changeable. Considering economic factors and the recovery of coal resources, this device can be widely promoted and applied.

[0041] It should be noted that the embodiments described herein are only partial embodiments of the present invention, rather than all implementations of the present invention, and the embodiments are only exemplary, and their role is only to provide a more intuitive and clear way to understand the content of the present invention, rather than to limit the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation methods that ordinary technicians in the field can think of without creative work, and other simple replacements and various changes to the technical solutions of the present invention, all belong to the protection scope of the present invention.

Claims

1. An underground triangular coal extreme negative pseudo-inclined mining device, characterized in that: The invention comprises a hydraulic support (1), a scraper conveyor (3), a transfer machine (6) and a crusher (7), wherein: The bottom of the hydraulic support (1) is provided with a bottom plate (2), which is arranged on the working surface. The other end of the hydraulic support (1) supports a scraper conveyor (3), and a coal mining machine (4) is arranged on the scraper conveyor (3). One end of the scraper conveyor (3) is connected to one end of a telescopic conveyor (5). A transfer machine (6) is installed at a point on the telescopic conveyor (5). A crusher (7) is arranged on the telescopic conveyor (5), and the crusher (7) is located at a downstream position of the transfer machine (6). The bottom end of the telescopic conveyor (5) is connected to a coal collection port (8).

2. The underground triangular coal extreme negative pseudo-inclined mining device according to claim 1, characterized in that: The hydraulic support (1) is provided with an emulsion pump.

3. The underground triangular coal extreme negative pseudo-inclined mining device according to claim 1, characterized in that: The hydraulic support (1) is provided with a push rod (9), and the top end of the push rod (9) is movably connected to the bottom of the scraper conveyor (3).

4. The underground triangular coal extreme negative pseudo-inclined mining device according to claim 3, characterized in that: The hydraulic support (1) is provided with a single pillar (10), one end of the single pillar (10) is provided with a connecting rope, the other end of the connecting rope is connected to the base of the scraper conveyor (3), the top end of the single pillar (10) contacts the base of the scraper conveyor (3) and is pressed against the top position of one side of the upper push rod (9).

5. The underground triangular coal extreme negative pseudo-inclined mining device according to claim 1, characterized in that: A transport chute (11) is provided downstream of the telescopic conveyor (5), and the transport chute (11) is fixed on the working transport surface.

6. The underground triangular coal extreme negative pseudo-inclined mining device according to claim 4, characterized in that: The single pillar (10) is made of high-strength alloy steel.

7. The underground triangular coal extreme negative pseudo-inclined mining device according to claim 1, characterized in that: The coal collection port (8) is sleeved with a dust removal bag.

8. The underground triangular coal extreme negative pseudo-inclined mining device according to claim 1, characterized in that: The extension and retraction of the hydraulic support (1) is controlled by a hydraulic system. The hydraulic system comprises a sensor, an actuator and a controller. The controller is arranged in a control room of the coal mining machine (4).

9. The underground triangular coal extreme negative pseudo-inclined mining device according to claim 8, characterized in that: The hydraulic system adopts a programmable logic controller as a core control unit.

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