A working face advancing degree identification and auxiliary straightening system and method

Abstract

The application discloses a working face advancing degree identification and auxiliary straightening system and method, and the working face advancing degree identification and auxiliary straightening system comprises a fixed position monitoring subsystem, a straightness monitoring subsystem and an up-and-down sliding subsystem; the working face advancing degree identification and auxiliary straightening method comprises the following steps: S1, judging whether the end support exists the up-and-down sliding phenomenon through the up-and-down sliding subsystem, and adjusting the mining technology according to the judgment result; S2, assigning the initial advancing degree of the working face in the working face starting state; S3, judging whether the working face advancing degree reaches the fixed point position through the fixed position monitoring subsystem; judging the current advancing degree of the end support according to the fixed point position; S4, judging whether the adjacent supports are parallel through the straightness monitoring subsystem; and S5, calculating the average value of the forward sliding stroke of all the supports after the support pulling action is finished, and the sum of the average value and the current advancing degree of the end support is the advancing degree of the current working face.

Description

Technical Field

[0001] This invention relates to the field of coal mining, and in particular to a working face advance recognition and auxiliary straightening system and method. Background Technology

[0002] During coal mining, the complexity of the mining process and the accuracy of the stroke sensors make it difficult to identify the advance of the coal face, resulting in significant cumulative errors that severely reduce the accuracy of face advance identification. In addition, the coal face often experiences phenomena such as upward and downward movement and uneven mining during the mining process, which seriously affect the information-based monitoring of coal mining operations. Therefore, it is necessary to improve these methods. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a simple and convenient system and method for identifying and assisting in the straightening of a working face.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] A working face advancement identification and auxiliary straightening system includes a fixed position monitoring subsystem, a straightness monitoring subsystem, and an upward / downward sliding subsystem. The fixed position monitoring subsystem includes several fixed position transmitting devices evenly spaced on the sidewalls along the length of the intake and return airways, and a fixed position receiving device mounted on an end support. The straightness monitoring subsystem includes an elastic parallel chain connecting adjacent supports and a straightness monitoring and analysis module mounted on the end support, with the signal end of the elastic parallel chain connected to the straightness monitoring and analysis module. The upward / downward sliding subsystem includes an infrared receiving module mounted on the end support and an infrared transmitting device mounted on an equipment train located within the intake or return airway.

[0006] Furthermore, the infrared receiving device includes a first receiving plate near the working face, a second receiving plate near the coal wall, and a third receiving plate away from the first receiving plate, with the first receiving plate, the second receiving plate, and the third receiving plate arranged side by side.

[0007] A method for identifying and assisting in straightening a working face advance, implemented through a working face advance identification and assisting in straightening system, includes the following steps:

[0008] S1. Determine whether there is an upward or downward movement of the end support through the upward and downward movement subsystem, and adjust the mining process according to the judgment result.

[0009] S2. Assign the initial advance of the working face at the beginning state;

[0010] S3. The fixed position monitoring subsystem determines whether the working face advance has reached the fixed point. When the fixed point is reached, the current advance of the end support is assigned the advance of the fixed point. When the fixed point is not reached, the current advance of the end support is still the advance before the working face advances.

[0011] S4. The straightness monitoring subsystem determines whether adjacent supports are parallel. When adjacent supports are not parallel, an early warning is issued that the support has not been moved into place, and the support is moved in the direction of reduced parallel chain stress. When adjacent supports are parallel, the advancement of all supports adopts the current advancement of the end support.

[0012] S5. Determine whether the support pulling action has ended. Ten minutes after the support pulling action ends, calculate the average value of the forward sliding stroke of all supports. The sum of this average value and the current advance of the end support is the current advance of the working face.

[0013] Furthermore, in step S1, when determining whether there is an upward or downward movement of the end support through the upward and downward movement subsystem, if the infrared emitting device illuminates the first receiving plate, the support is biased towards the coal wall, and the head-adding-cutting process is used for mining operations; if the infrared emitting device illuminates the second receiving plate, the support is biased towards the goaf, and the tail-adding-cutting process is used for mining operations; if the infrared emitting device illuminates the third receiving plate, the support has not shifted, and normal mining operations are carried out.

[0014] Furthermore, in step S3, when the fixed position monitoring subsystem determines whether the working face has reached the fixed point, when the fixed position receiving device on the end support receives the signal emitted by the fixed position transmitting device, the distance between the position of the fixed position transmitting device and the initial progress of the working face is the progress of the fixed point.

[0015] Furthermore, in step S4, when determining whether adjacent supports are parallel through the straightness monitoring subsystem, the straightness monitoring and analysis module checks the magnitude of the elastic parallel chain stress between adjacent supports. When the elastic parallel chain stress is less than the set value, the adjacent supports are considered to be parallel to each other; when the elastic parallel chain stress is not less than the set value, the adjacent supports are considered to be non-parallel.

[0016] Compared with the prior art, the advantages and positive effects of this invention are:

[0017] This invention combines the existing travel sensor equipment at the working face with the monitoring methods of the fixed position monitoring subsystem in the roadway, avoiding the cumulative errors caused by using the existing travel sensor equipment alone and improving the accuracy of monitoring the working face's advance. At the same time, it avoids the high cost of densely deploying sensors required by using fixed position monitoring alone. Furthermore, this invention can also monitor the straightness of the working face through the straightness monitoring subsystem and monitor upward and downward movement of the working face through the upward and downward movement subsystem, which are common problems in mines. It uses common infrared devices and strain gauges, which can partially replace the inertial navigation system, reducing the cost investment in straightness monitoring and upward and downward movement control in mines, and further improving the effectiveness of this invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a detailed diagram of the straightness monitoring of the support frame according to the present invention;

[0021] Figure 3 This is a flowchart illustrating the framework of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art to all other embodiments obtained without creative effort should be included within the protection scope of the present invention.

[0023] like Figure 1 , Figure 2 As shown, this embodiment discloses a working face advancement recognition and auxiliary straightening system, including a fixed position monitoring subsystem, a straightness monitoring subsystem, and an upward and downward sliding subsystem;

[0024] The fixed position monitoring subsystem includes several fixed position transmitting devices 2 evenly spaced on the sidewalls along the length of the intake airway 1 and the return airway 3, and a fixed position receiving device 11 mounted on the end support 6. When the end support reaches the fixed position point in the intake airway or the return airway, the fixed position receiving device on the end support can read the advance information from the fixed position transmitting device. That is, fixed position points with known advance are set up in a certain area of ​​the working face, and relevant signal transmitting devices are installed at the fixed position points to ensure that the relevant information of the fixed point can be received when the end support is facing the fixed point.

[0025] The straightness monitoring subsystem includes an elastic parallel chain 10 connected between adjacent supports and a straightness monitoring and analysis module 7 installed on the end support 6. The signal end of the elastic parallel chain 10 is connected to the straightness monitoring and analysis module 7.

[0026] The upward sliding subsystem includes an infrared receiving module 9 mounted on an end support 6 and an infrared transmitting device 8 mounted on an equipment train located inside the air intake tunnel 1.

[0027] The infrared receiving device 9 includes a first receiving plate 901 near the working face, a second receiving plate 903 near the coal wall, and a third receiving plate 902 away from the first receiving plate. The first receiving plate 901, the second receiving plate 903, and the third receiving plate 902 are arranged side by side.

[0028] The working face sliding and sliding monitoring system needs to ensure that the infrared transmitter on the air intake roadway equipment train emits along the roadway direction and that the distance between the projection fixed point and the working face is consistent. Its working principle is: mainly using the positional deviation of the three receiving plates to determine whether the end support has shifted, thereby determining whether the overall support of the working face has slid and slid.

[0029] The face slippage monitoring system can be used to monitor face slippage. When face slippage is detected, the mining process can be adjusted according to the offset of the end support to straighten the face in time. Specifically, when the support is biased towards the goaf side, a tail-end cutting tool mining mode can be adopted to adjust the face in time and avoid serious face slippage; when the support is biased towards the solid coal side, a head-end cutting tool mining mode can be adopted to adjust the face in time and avoid serious face slippage.

[0030] like Figure 3 As shown, this invention discloses a method for identifying and assisting in straightening a working face, which is implemented through a working face advancement identification and assisting in straightening system; it includes the following steps:

[0031] S1. Determine whether there is an upward or downward movement of the end support through the upward and downward movement subsystem, and adjust the mining process according to the judgment result.

[0032] In step S1, when the upward and downward sliding subsystem determines whether there is an upward or downward sliding phenomenon in the end support, if the infrared emitting device illuminates the first receiving plate, the support is biased towards the coal wall, and the head-adding cutting process is used for mining operation; if the infrared emitting device illuminates the second receiving plate, the support is biased towards the goaf, and the tail-adding cutting process is used for mining operation; if the infrared emitting device illuminates the third receiving plate, the support has not shifted, and normal mining operation is carried out.

[0033] S2. Assign an initial advance rate to the working face at the start of the working face; if no value is assigned, the working face is considered to be in its first mining operation, and the advance rate is assigned to 0.

[0034] S3. The fixed position monitoring subsystem determines whether the working face advance has reached the fixed point. When the fixed point is reached, the current advance of the end support is assigned the advance of the fixed point. When the fixed point is not reached, the current advance of the end support is still the advance before the working face advances.

[0035] In step S3, when the fixed position monitoring subsystem determines whether the working face advance has reached the fixed point, when the fixed position receiving device 11 on the end support 6 receives the signal emitted by the fixed position transmitting device 2, the distance between the position of the fixed position transmitting device 2 and the initial advance of the working face is the advance of the fixed point.

[0036] S4. The straightness monitoring subsystem determines whether the middle support 5 and the end support 6 are parallel. If the middle support 5 and the end support 6 are not parallel, an early warning is issued that the support has not been moved into place, and the support is moved in the direction of reduced parallel chain stress. When the middle support 5 and the end support 6 are parallel, the advancement of all supports adopts the current advancement of the end support.

[0037] In step S4, when the straightness monitoring subsystem determines whether adjacent supports are parallel, the straightness monitoring and analysis module checks the stress of the elastic parallel chain 10 between adjacent supports. When the stress value of the elastic parallel chain 10 meets the set range, the adjacent supports are considered to be parallel to each other, that is, the straightness of the two supports is good; when the stress value of the elastic parallel chain 10 does not meet the set range, the adjacent supports are considered not to be parallel.

[0038] S5. Determine whether the support has undergone a "pull-up" action. After the "pull-up" action ends and the data stabilizes, calculate the average value of the forward slippage of all supports. The sum of this average value and the current advance of the end support is the current advance of the working face.

[0039] There are two cases for calculating the advance of the end and end supports;

[0040] In the first case, when passing through the fixed points in the intake airway and return airway, the advance of the end support and the end support is recorded as the fixed point position information of the intake airway and return airway.

[0041] In the second scenario, when the fixed points of the intake and return airways are not passed, several end (end) supports are selected, and the pulling action of the selected end supports is monitored. The forward sliding stroke data of the selected end (end) supports before and after the pulling action is screened (the forward sliding stroke data is monitored by installing stroke sensors on the supports, which is the conventional monitoring method on the market now). The difference (positive number) of the forward sliding stroke data of each selected end (end) support before and after the pulling action is calculated, and the average of the forward sliding stroke data differences of each selected end (end) support is calculated. The advancement of this end (end) support after the movement is the advancement of the previous end (end) support + the average of the forward sliding stroke data differences of each selected end (end) support.

[0042] This invention combines the existing travel sensor equipment at the working face with the monitoring methods of the fixed position monitoring subsystem in the roadway, avoiding the cumulative errors caused by using the existing travel sensor equipment alone and improving the accuracy of monitoring the working face's advance. At the same time, it avoids the high cost of densely deploying sensors required by using fixed position monitoring alone. Furthermore, this invention can also monitor the straightness of the working face through the straightness monitoring subsystem and monitor upward and downward movement of the working face through the upward and downward movement subsystem, which are common problems in mines. It uses common infrared devices and strain gauges, which can partially replace the inertial navigation system, reducing the cost investment in straightness monitoring and upward and downward movement control in mines, and further improving the effectiveness of this invention.

Claims

1. A method for identifying and assisting in straightening the advance of a working face, characterized in that: The system is implemented through a face advance recognition and auxiliary straightening system, which includes a fixed position monitoring subsystem, a straightness monitoring subsystem, and an upward and downward sliding subsystem. The straightness monitoring subsystem includes an elastic parallel chain connecting adjacent supports and a straightness monitoring and analysis module installed on the end support. The signal end of the elastic parallel chain is connected to the straightness monitoring and analysis module. The upward and downward sliding subsystem includes an infrared receiving module installed on the end support and an infrared emitting device installed on the equipment train, which is located in the intake or return airway. The infrared receiving device includes a first receiving plate near the working face, a second receiving plate near the coal wall, and a third receiving plate away from the first receiving plate. The first, second, and third receiving plates are arranged side by side. Includes the following steps: S1. Determine whether there is upward or downward movement of the end support through the upward and downward movement subsystem, and adjust the mining process according to the determination result; when the upward and downward movement subsystem determines whether there is upward or downward movement of the end support, if the infrared transmitter shines on the first receiving plate, the support is biased towards the coal wall, and the head-adding-cutting process is used for mining operation; if the infrared transmitter shines on the second receiving plate, the support is biased towards the goaf, and the tail-adding-cutting process is used for mining operation; if the infrared transmitter shines on the third receiving plate, the support has not shifted, and normal mining operation is carried out. S2. Assign the initial advance of the working face at the beginning state; S3. The fixed position monitoring subsystem determines whether the working face advance has reached the fixed point. When the fixed point is reached, the current advance of the end support is assigned the advance of the fixed point. When the fixed point is not reached, the current advance of the end support is still the advance before the working face advances. S4. The straightness monitoring subsystem determines whether adjacent supports are parallel. When adjacent supports are not parallel, an early warning is issued that the support has not been moved into place, and the support is moved in the direction of reduced parallel chain stress. When adjacent supports are parallel, the advancement of all supports adopts the current advancement of the end support. S5. Determine whether the support pulling action has ended. Ten minutes after the support pulling action ends, calculate the average value of the forward sliding stroke of all supports. The sum of this average value and the current advance of the end support is the current advance of the working face.

2. The working face advancement identification and auxiliary straightening method as described in claim 1, characterized in that: The fixed position monitoring subsystem includes several fixed position transmitting devices that are equally spaced on the side walls along the length of the intake and return airways, and a fixed position receiving device that is mounted on the end support.

3. The working face advancement identification and auxiliary straightening method as described in claim 2, characterized in that: In step S3, when the fixed position monitoring subsystem determines whether the working face advance has reached the fixed point, when the fixed position receiving device on the end support receives the signal emitted by the fixed position transmitting device, the distance between the position of the fixed position transmitting device and the initial advance of the working face is the advance of the fixed point.

4. The working face advancement identification and auxiliary straightening method as described in claim 3, characterized in that: In step S4, when determining whether adjacent supports are parallel through the straightness monitoring subsystem, the straightness monitoring and analysis module checks the magnitude of the elastic parallel chain stress between adjacent supports. When the elastic parallel chain stress is less than the set value, the adjacent supports are considered to be parallel to each other; when the elastic parallel chain stress is not less than the set value, the adjacent supports are considered to be non-parallel.

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