A fill pipe system and method of operation to prevent drill wear

Abstract

The present application relates to a kind of filling pipeline system and operating method of anti-drilling impact wear, belong to mine filling slurry pipeline transportation technical field;Anti-drilling impact wear filling pipeline system, including filling borehole, borehole bottom elbow pipe, horizontal filling pipe, filling borehole upper end is provided with funnel type opening, the opening of filling borehole is provided with the mixer for storing filling slurry and the high buffer reservoir for storing buffer water above, first gate valve, second gate valve are respectively installed on the discharge pipeline of mixer and high buffer reservoir, the end of horizontal filling pipe close to borehole bottom elbow pipe is installed with third gate valve;The present application can be by buffer water to filling slurry and play buffering effect to reduce the impact wear of filling slurry to borehole bottom elbow pipe, by improving the liquid level height of filling slurry in filling borehole effectively reduce the impact damage of filling slurry falling to interface filling borehole, overall structure is simple, easy to operate, maintenance difficulty is low, and the effect of anti-impact wear is good.

Description

Technical Field

[0001] This invention relates to a filling pipeline system and operating method that prevents drilling impact and wear, belonging to the field of mine filling slurry pipeline transportation technology. Background Technology

[0002] Backfilling mining refers to a mining method in which backfilling slurry 1 is used to fill the goaf area while ore is being cut, transported and other operations are being carried out, in order to support the rock strata, control ground pressure activity, prevent surface subsidence and protect surface features. The mine backfilling process involves preparing backfilling slurry 1 at the surface backfilling station and then transporting the slurry from the surface to the goaf area underground in the mine through backfilling pipelines.

[0003] Traditional filling pipeline systems typically consist of a vertical filling borehole 2, a horizontal filling pipe 4, and a bend 3 connecting the two. Under the influence of gravity, the filling slurry 1 falls freely in the filling borehole 2 at a speed of 50–80 m / s. In the initial stage of filling, the filling slurry 1 causes strong impact and wear on the bend 3 at the bottom of the filling borehole 2. During the normal filling stage, it is difficult for the filling borehole 2 to be completely filled with slurry, forming a filling slurry-air interface. After the filling slurry 1 falls freely to the interface, its speed decreases sharply and its energy dissipates rapidly, causing severe impact damage to the filling borehole 2 at the interface. The impact and wear of the slurry on these two parts greatly reduces the service life of the filling pipeline, bringing hidden dangers such as blockage and pipe bursts in the filling borehole 2, which has a significant impact on the normal production of the mine, increases production costs, and makes maintenance more difficult.

[0004] In the prior art, there are also pipeline systems that can reduce pipeline wear. For example, Chinese Patent No. CN113137271A discloses an integrated device for flexible cutting and anti-clogging of vertical drilling in mine filling and bottom wear reduction. This device includes two parts, one above ground and one below ground. The underground part includes a buffer tank, a high-pressure inspection port of the buffer tank, a blind flange of the inspection port, a steel plate, bolts, and a filling pipe. By arranging a cylindrical buffer tank underground and setting a through hole at the bottom of the buffer tank, the impact force of the filling material on the connection between the vertical and horizontal pipelines is reduced, thereby reducing pipeline wear. Another example is the filling riser buffer device disclosed in Chinese Patent No. CN211821263U, which includes a base and a buffer tank. The bottom of the buffer tank is installed on the base, the top of the buffer tank is connected to the feed pipeline, and the lower side wall of the buffer tank is connected to the discharge pipeline. This device replaces the elbow section at the bottom of the feed pipeline with the buffer tank, thereby reducing the impact and wear of the slurry on the feed pipeline. However, the above-mentioned method of changing the structure of the bend at the bottom of the borehole cannot completely avoid the impact of the slurry falling freely on the bottom of the borehole during the initial filling. The impact and wear of the slurry on the bottom of the buffer tank or buffer hopper are still quite serious. Moreover, this method makes the structure of the filling pipe at the bottom of the borehole more complex and inconvenient for inspection and maintenance. In addition, the above-mentioned method of changing the structure of the bend at the bottom of the borehole cannot control the impact and wear of the slurry on the borehole at the slurry-air interface of the filling material. The problem of impact and wear of the filling pipe has not been fundamentally solved.

[0005] Therefore, it is necessary to provide a filling pipeline system and operation method that is simple in structure, easy to operate, and has good anti-drilling impact and wear effect. Summary of the Invention

[0006] To overcome the problems existing in the background technology, this invention proposes a filling pipeline system and operation method for preventing borehole impact and wear. By separately installing a mixer and a high-level buffer water tank on the filling borehole to store the filling slurry and buffer water respectively, and by installing a first gate valve, a second gate valve, and a third gate valve to control the discharge of the filling slurry and buffer water, the buffer water can buffer the filling slurry, thereby reducing the impact of the free fall of the filling slurry on the bottom bend of the borehole during the initial stage of filling. This effectively reduces the impact and wear of the filling slurry on the bottom bend of the borehole. By increasing the liquid level of the filling slurry in the filling borehole, the falling velocity of the filling slurry at the filling slurry-air interface can be effectively reduced, thus effectively reducing the impact damage of the falling filling slurry on the filling borehole at the interface. The overall structure is simple, easy to operate, and has low maintenance difficulty. It has good impact and wear prevention effect, can extend the service life of the filling borehole and the bottom bend of the borehole, and can effectively avoid pipeline blockage and pipe bursts, ensuring normal production order.

[0007] To solve the above problems, the present invention is achieved through the following technical solution:

[0008] An operating method for a filling pipeline system resistant to borehole impact and wear, characterized in that: the filling pipeline system resistant to borehole impact and wear includes a filling borehole, a bottom bend in the borehole, and a horizontal filling pipe; the filling borehole and the horizontal filling pipe are arranged at right angles; the two ends of the bottom bend in the borehole connect the filling borehole and the horizontal filling pipe; the filling borehole has a funnel-shaped opening at its upper end; a mixer for storing filling slurry and a high-level buffer tank for storing buffer water are provided above the opening of the filling borehole; the outlets of the mixer and the high-level buffer tank are located at the opening of the filling borehole. Above the outlet, a first gate valve and a second gate valve are respectively installed on the discharge pipes of the mixer and the high-level buffer water tank. A third gate valve is installed at the end of the horizontal filling pipe near the bottom bend of the borehole. A first pressure gauge is installed at the position between the third gate valve and the bottom bend of the borehole on the horizontal filling pipe. Before filling begins, when the pressure value of the first pressure gauge reaches 98% of the pressure of the filling borehole and the bottom bend of the borehole filled with buffer water, the second gate valve closes while the first and third gate valves open. The operation method of the filling pipeline system for preventing borehole impact and wear includes at least the following steps:

[0009] S1: Calculate the pressure value P0 of the first pressure gauge after the borehole and the bottom bend of the borehole are filled with buffer water, and the resistance per unit length of the horizontal filling pipe after normal filling with filler slurry. m The liquid level height H2 of the filling slurry in the borehole after normal filling is calculated using the following formula:

[0010] , ,

[0011] Where, ρ w The density of buffer water, kg / m³ 3 ,

[0012] H is the sum of the vertical heights of the filling borehole and the bottom bend of the borehole, in meters (m).

[0013] P1 is the pressure value of the first pressure gauge during normal filling, in Pa.

[0014] P2 is the pressure value of the second pressure gauge during normal filling, in Pa.

[0015] L1 is the distance between the first pressure gauge and the second pressure gauge, in meters (m).

[0016] ρ s The density of the filling slurry is expressed in kg / m³. 3 ,

[0017] L2 is the distance between the first pressure gauge and the filling borehole, in meters (m).

[0018] The above formulas are then compiled into a calculation program and stored in the host computer.

[0019] S2: Close the first gate valve and the third gate valve, open the second gate valve, and inject the buffer water in the high-level buffer water tank into the filling borehole;

[0020] S3: When the pressure value of the first pressure gauge reaches 0.98P0, the host computer sends a control command to control the second gate valve to close through the slave computer;

[0021] S4: The host computer sends a control command to the slave computer to open the first gate valve, injecting the filling slurry in the mixer into the filling borehole, and start the normal filling of the filling slurry.

[0022] S5: The host computer sends a control command to the slave computer to open the third gate valve, and the horizontal filling pipe begins to discharge buffer water and filling slurry. The buffer water can buffer the filling slurry and prevent the bottom bend of the borehole from being impacted by the free fall of the filling slurry in the initial stage of filling.

[0023] S6: After the horizontal filling pipe is filled with filling slurry, the host computer sends a control command to the slave computer to adjust the opening of the first gate valve and the third gate valve to increase the filling flow rate of the filling slurry, thereby increasing the flow resistance of the filling slurry and increasing the liquid level height H2 of the filling slurry in the filling borehole, so as to reduce the falling speed of the filling slurry at the filling slurry-air interface.

[0024] Preferably, steps S4 and S5 can be performed simultaneously.

[0025] Preferably, in step S6, the flow resistance of the filling slurry can also be increased by increasing the concentration of the filling slurry.

[0026] Preferably, a second pressure gauge is installed at a position away from the bottom bend of the borehole in the horizontal filling pipe, and the third gate valve is placed between the first pressure gauge and the second pressure gauge and close to the first pressure gauge.

[0027] Preferably, the first gate valve, the second gate valve, the third gate valve, the first pressure gauge, and the second pressure gauge are connected to the lower-level machine via a data transmission cable, and the lower-level machine is connected to the upper-level machine via a data transmission cable.

[0028] The beneficial effects of this invention are as follows:

[0029] This invention features a mixer and a high-level buffer tank on the filling borehole to store the filling slurry and buffer water, respectively. A first, second, and third gate valve are used to control the discharge of the filling slurry and buffer water. The buffer water acts as a buffer against the filling slurry, mitigating the impact of the free-falling slurry on the bottom bend of the borehole during the initial filling stage. This effectively reduces the impact and wear on the bottom bend caused by the filling slurry. Furthermore, by increasing the slurry level within the filling borehole, the falling velocity at the slurry-air interface is reduced, further minimizing the impact damage to the filling borehole at the interface. The overall structure is simple, easy to operate, and requires minimal maintenance. It provides excellent impact and wear protection, extending the service life of the filling borehole and the bottom bend, effectively preventing pipe blockages and bursts, and ensuring normal production operations. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a control diagram of the present invention.

[0032] Explanation of reference numerals in the attached drawings: 1-filling slurry, 2-filling borehole, 3-bottom bend of the borehole, 4-horizontal filling pipe, 5-mixer, 6-buffer water, 7-high-level buffer water tank, 8-first gate valve, 9-second gate valve, 10-third gate valve, 11-first pressure gauge, 12-second pressure gauge, 13-data transmission cable, 14-lower-level computer, 15-upper-level computer. Detailed Implementation

[0033] To make the objectives, technical solutions, and effects of this invention clear and easy to understand, the preferred embodiments of this invention will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can understand them.

[0034] It should be noted that, in the description of this invention, unless otherwise specified and limited, the terms "installation", "connection", "linking", "interconnection", etc., should be interpreted broadly, that is, they can be fixed connections or detachable connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium.

[0035] In this invention, such as Figure 1-2As shown, a filling pipeline system for preventing borehole impact and wear includes a filling borehole 2, a bottom bend 3, and a horizontal filling pipe 4. The filling borehole 2 and the horizontal filling pipe 4 are arranged at right angles. The bottom bend 3 connects the filling borehole 2 and the horizontal filling pipe 4 at both ends. The upper end of the filling borehole 2 is provided with a funnel-shaped opening. By setting the upper opening of the filling borehole 2 into a funnel-shaped structure, it is easy to receive the filling slurry 1 and buffer water 6, preventing the filling slurry 1 and buffer water 6 from spilling out of the filling borehole 2. Above the opening of the filling borehole 2, a mixer 5 for storing the filling slurry 1 and a high-level buffer water tank 7 for storing the buffer water 6 are provided. The discharge ports of the mixer 5 and the high-level buffer water tank 7 are located above the opening of the filling borehole 2, and a first gate valve 8 and a second gate valve are respectively installed on the discharge pipes of the mixer 5 and the high-level buffer water tank 7. 9. A third gate valve 11 is installed at one end of the horizontal filling pipe 4 near the bottom bend 3 of the borehole, and a first pressure gauge 11 is installed at the position between the third gate valve 11 and the bottom bend 3 of the borehole on the horizontal filling pipe 4. In this embodiment, before filling begins, when the pressure value of the first pressure gauge 11 reaches 98% of the pressure of the filling borehole 2 and the bottom bend 3 filled with buffer water 6, that is, when the buffer water 6 has not completely filled the filling borehole 2, the second gate valve 9 is closed and the first gate valve 8 and the third gate valve 11 are opened, so as to avoid overflow when the filling slurry 1 is injected into the filling borehole 2 after the filling borehole 2 is filled with buffer water 6. In the initial stage of filling, after the third gate valve 11 is opened, the horizontal filling pipe 4 begins to discharge the buffer water 6 and the filling slurry 1. The buffer water 6 located in the filling borehole 2 can be directly discharged to the underground goaf area of ​​the mine along with the filling slurry 1.

[0036] This embodiment injects buffer water 6 into the filling borehole 2 and the bottom bend 3 before normal filling of the filler slurry 1. Then, the filling slurry 1 is injected into the filling borehole 2 filled with buffer water 6. The buffer water 6 acts as a buffer for the filling slurry 1, reducing the impact of the free fall of the filling slurry 1 on the bottom bend 3 during the initial filling stage. This effectively reduces the impact wear of the filling slurry 1 on the bottom bend 3, preventing pipe blockage and bursts, ensuring normal production, and extending the service life of the bottom bend 3. The overall structure is simple, easy to operate, and has low maintenance difficulty, providing good impact and wear resistance. In specific applications, tap water can be used as the buffer water 6. During normal filling of the filler slurry 1… After the filling slurry 1 fills the horizontal filling pipe 4, it gradually accumulates in the bottom bend 3 of the borehole and in the filling borehole 2. At the same time, the liquid level of the filling slurry 1 gradually rises. At this time, the filling flow rate of the filling slurry 1 can be increased by increasing the opening of the first gate valve 8 and the third gate valve 11, thereby increasing the flow resistance of the filling slurry 1. Alternatively, the flow resistance of the filling slurry 1 can be increased by increasing the concentration of the filling slurry 1 discharged from the mixer 5, thereby increasing the liquid level height H2 of the filling slurry 1 in the filling borehole 2. This can effectively reduce the falling speed of the filling slurry 1 at the filling slurry-air interface, thereby effectively reducing the impact damage of the falling filling slurry 1 on the filling borehole 2 at the interface, extending the service life of the filling borehole 2, and effectively preventing pipeline blockage and pipe bursting.

[0037] In one embodiment, a second pressure gauge 12 is installed at a position on the horizontal filling pipe 4 away from the bottom bend 3 of the borehole. The third gate valve 11 is placed between the first pressure gauge 11 and the second pressure gauge 12 and close to the first pressure gauge 11, so as to detect the pressure of the filling slurry 1 at two positions in the horizontal filling pipe 4 through the first pressure gauge 11 and the second pressure gauge 12, thereby monitoring the resistance per unit length of the filling slurry 1 in the horizontal filling pipe 4 in real time. Then, the flow resistance of the filling slurry 1 in the horizontal filling pipe 4 can be increased by adjusting the opening of the first gate valve 8 and the third gate valve 11 or by adjusting the concentration of the filling slurry 1, so as to maintain the liquid level H2 of the filling slurry 1 in the filling borehole 2 at a high level, thereby effectively reducing the impact damage of the falling filling slurry 1 on the filling borehole 2 at the interface.

[0038] Preferably, the first gate valve 8, second gate valve 9, third gate valve 11, first pressure gauge 11, and second pressure gauge 12 are connected to the lower-level computer 14 via a data transmission cable 13. The lower-level computer 14 is also connected to the upper-level computer 15 via the same data transmission cable 13. This allows the upper-level computer 15 to monitor the pressure values ​​of the first pressure gauge 11 and second pressure gauge 12 in real time and to adjust the opening of the first gate valve 8, second gate valve 9, and third gate valve 11 in real time via the lower-level computer 14. In specific applications, the upper-level computer 15 can be a PC / host computer / master, computer / upper, etc., and the lower-level computer 14 can be a PLC / single chip, microcomputer / slave, etc.

[0039] In this invention, such as Figure 1-2 As shown, an operation method for a drilling impact abrasion resistant filling pipeline system employs the drilling impact abrasion resistant filling pipeline system described in any one of the preceding claims. The operation method of the drilling impact abrasion resistant filling pipeline system includes at least the following steps:

[0040] S1: Calculate the pressure value P0 (Pa) of the first pressure gauge 11 after filling the borehole 2 and the bottom bend 3 with buffer water 6, and the resistance per unit length i of the horizontal filling pipe 4 after normal filling with filler slurry 1. m The liquid level height H2 (m) of the filling slurry 1 in borehole 2 after normal filling of filling slurry 1 is calculated using the following formula:

[0041] , ,

[0042] Where, ρ w The density of buffer water 6 is kg / m³ 3 ,

[0043] H is the sum of the vertical heights of the filling borehole 2 and the bottom bend of the borehole 3, in meters.

[0044] P1 is the pressure value (in Pa) of the first pressure gauge 11 during normal filling.

[0045] P2 is the pressure value (in Pa) of the second pressure gauge 12 during normal filling.

[0046] L1 is the distance between the first pressure gauge 11 and the second pressure gauge 12, in meters (m).

[0047] ρ s The density of filling slurry 1 is kg / m³. 3 ,

[0048] L2 is the distance between the first pressure gauge 11 and the filling borehole 2, in meters.

[0049] The above formulas are compiled into a calculation program and stored in the host computer 15;

[0050] S2: Close the first gate valve 8 and the third gate valve 11, open the second gate valve 9, and inject the buffer water 6 in the high-level buffer water tank 7 into the filling borehole 2;

[0051] S3: When the pressure value of the first pressure gauge 11 reaches 0.98P0, the host computer 15 sends a control command to control the second gate valve 9 to close through the slave computer 14;

[0052] S4: The host computer 15 sends a control command to control the first gate valve 8 to open through the slave computer 14, so as to inject the filling slurry 1 in the mixer 5 into the filling borehole 2 and start the normal filling of the filling slurry 1.

[0053] S5: The host computer 15 sends a control command to control the third gate valve 11 to open through the slave computer 14. The horizontal filling pipe 4 begins to discharge buffer water 6 and filling slurry 1. The buffer water 6 can buffer the filling slurry 1 and prevent the bottom bend pipe 3 of the borehole from being impacted by the free fall of the filling slurry 1 in the initial stage of filling.

[0054] S6: After the horizontal filling pipe 4 is filled with filling slurry 1, the host computer 15 sends a control command to the slave computer 14 to adjust the opening of the first gate valve 8 and the third gate valve 11 to increase the filling flow rate of filling slurry 1, thereby increasing the flow resistance of filling slurry 1, and thus increasing the liquid level height H2 of filling slurry 1 in the filling borehole 2, so as to reduce the falling speed of filling slurry 1 at the filling slurry-air interface.

[0055] In this embodiment, the pressure value P0 of the first pressure gauge 11 after filling the borehole 2 and the bottom bend 3 with buffer water 6, and the resistance i per unit length of the horizontal filling pipe 4 after normal filling with filler slurry 1 are used to measure the pressure value P0 of the first pressure gauge 11 after filling the borehole 2 and the bottom bend 3 with buffer water 6. m The calculation formula for the liquid level height H2 of the filling slurry 1 in the borehole 2 after normal filling of the filling slurry 1 is stored in the host computer 15. This allows the pressure P1 and P2 of the filling slurry 1 at two positions inside the horizontal filling pipe 4 to be detected by the first pressure gauge 11 and the second pressure gauge 12. The host computer 15 can then display the detection data and calculation results in real time, thereby enabling the monitoring of P0 and P2. m H2 is monitored in real time so that the opening of the first gate valve 8, the second gate valve 9 and the third gate valve 11 can be adjusted in real time by the upper computer 15 through the lower computer 14, so that the liquid level H2 of the filling slurry 1 in the filling borehole 2 is maintained at a high level, so as to effectively reduce the impact damage of the filling slurry 1 falling on the filling borehole 2 at the interface.

[0056] In one embodiment, steps S4 and S5 can also be performed simultaneously, that is, the first gate valve 8 and the third gate valve 11 are opened at the same time. While the buffer water 6 is discharged from the horizontal filling pipe 4, the mixer 5 injects the filling slurry 1 into the filling borehole 2. This ensures that the filling slurry 1 reaches the bottom of the bottom bend 3 of the borehole and begins to accumulate before the buffer water 6 in the filling borehole 2 is completely discharged, thereby ensuring the buffering effect of the buffer water 6 on the filling slurry 1. In addition, the simultaneous opening of the first gate valve 8 and the third gate valve 11 can also increase the discharge rate of the buffer water 6 while ensuring the buffering effect of the buffer water 6 on the filling slurry 1, so as to reduce the dilution of the filling slurry 1 by the buffer water 6 and improve the filling quality of the filling slurry 1.

[0057] In one embodiment, in step S6, the flow resistance of the filling slurry 1 can be increased by increasing the concentration of the filling slurry 1, thereby increasing the liquid level height H2 of the filling slurry 1 in the filling borehole 2, so as to reduce the falling speed of the filling slurry 1 at the filling slurry-air interface.

[0058] This invention features a mixer and a high-level buffer tank on the filling borehole to store the filling slurry and buffer water, respectively. A first, second, and third gate valve are used to control the discharge of the filling slurry and buffer water. The buffer water acts as a buffer against the filling slurry, mitigating the impact of the free-falling slurry on the bottom bend of the borehole during the initial filling stage. This effectively reduces the impact and wear on the bottom bend caused by the filling slurry. Furthermore, by increasing the slurry level within the filling borehole, the falling velocity at the slurry-air interface is reduced, further minimizing the impact damage to the filling borehole at the interface. The overall structure is simple, easy to operate, and requires minimal maintenance. It provides excellent impact and wear protection, extending the service life of the filling borehole and the bottom bend, effectively preventing pipe blockages and bursts, and ensuring normal production operations.

[0059] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. An operating method for a filling pipeline system resistant to drilling impact wear, characterized in that: The filling pipeline system for preventing drilling impact wear includes a filling borehole (2), a bottom bend (3), and a horizontal filling pipe (4). The filling borehole (2) and the horizontal filling pipe (4) are arranged at right angles. The bottom bend (3) connects the filling borehole (2) and the horizontal filling pipe (4) at both ends. The filling borehole (2) is characterized by having a funnel-shaped opening at the upper end. Above the opening of the filling borehole (2) are a mixer (5) for storing filling slurry (1) and a high-level buffer water tank (7) for storing buffer water (6). The outlets of the mixer (5) and the high-level buffer water tank (7) are located above the opening of the filling borehole (2). (7) The discharge pipe is equipped with a first gate valve (8) and a second gate valve (9). The horizontal filling pipe (4) is equipped with a third gate valve (10) at one end near the bottom bend (3) of the borehole. A first pressure gauge (11) is installed at the position between the third gate valve (10) and the bottom bend (3) of the borehole. Before filling begins, when the pressure value of the first pressure gauge (11) reaches 98% of the pressure of the filling borehole (2) and the bottom bend (3) of the borehole filled with buffer water (6), the second gate valve (9) closes and the first gate valve (8) and the third gate valve (10) open. The operation method of the filling pipe system for preventing borehole impact and wear includes at least the following steps: S1: Calculate the pressure value P0 of the first pressure gauge (11) after the filling borehole (2) and the bottom bend of the borehole (3) are filled with buffer water (6), and the resistance per unit length of the horizontal filling pipe (4) after normal filling of the filler slurry (1). m The liquid level height H2 of the filling slurry (1) in the borehole (2) after normal filling of the filling slurry (1) is calculated by the following formula: 、 、 Where, ρ w The density of buffer water (6), kg / m³ 3 , H is the sum of the vertical heights of the filling borehole (2) and the bottom bend (3), in meters. P1 is the pressure value of the first pressure gauge (11) during normal filling, in Pa. P2 is the pressure value of the second pressure gauge (12) during normal filling, in Pa. L1 is the distance between the first pressure gauge (11) and the second pressure gauge (12), in meters. ρ s The density of the filling slurry (1) is kg / m³. 3 , L2 is the distance between the first pressure gauge (11) and the filling borehole (2), in meters. The above formulas are compiled into a calculation program and stored in the host computer (15); S2: Close the first gate valve (8) and the third gate valve (10), open the second gate valve (9), and inject the buffer water (6) in the high-level buffer water tank (7) into the filling borehole (2); S3: When the pressure value of the first pressure gauge (11) reaches 0.98P0, the host computer (15) sends a control command to control the second gate valve (9) to close through the slave computer (14); S4: The host computer (15) sends a control command to control the first gate valve (8) to open through the lower computer (14), and injects the filling slurry (1) in the mixer (5) into the filling borehole (2) to start normal filling of the filling slurry (1). S5: The host computer (15) sends a control command to control the third gate valve (10) to open through the slave computer (14), and the horizontal filling pipe (4) begins to discharge buffer water (6) and filling slurry (1). The buffer water (6) can buffer the filling slurry (1) and prevent the bottom bend pipe (3) of the borehole from being impacted by the free fall of the filling slurry (1) in the initial stage of filling. S6: After the horizontal filling pipe (4) is filled with filling slurry (1), the host computer (15) issues a control command to adjust the opening of the first gate valve (8) and the third gate valve (10) through the lower computer (14) to increase the filling flow rate of filling slurry (1), thereby increasing the flow resistance of filling slurry (1) and increasing the liquid level height H2 of filling slurry (1) in the filling borehole (2) to reduce the falling speed of filling slurry (1) at the filling slurry-air interface.

2. The operation method of the filling pipeline system for preventing borehole impact wear according to claim 1, characterized in that: Steps S4 and S5 can also be performed simultaneously.

3. The operating method of a filling pipeline system for preventing borehole impact wear according to claim 1 or 2, characterized in that: In step S6, the flow resistance of the filling slurry (1) can also be increased by increasing the concentration of the filling slurry (1).

4. The operation method of the filling pipeline system for preventing drilling impact wear according to claim 1, characterized in that: The second pressure gauge (12) is installed at a position away from the bottom bend (3) of the borehole on the horizontal filling pipe (4). The third gate valve (10) is placed between the first pressure gauge (11) and the second pressure gauge (12) and close to the first pressure gauge (11).

5. The operation method of the filling pipeline system for preventing drilling impact wear according to claim 4, characterized in that: The first gate valve (8), the second gate valve (9), the third gate valve (10), the first pressure gauge (11), and the second pressure gauge (12) are connected to the lower-level machine (14) via a data transmission cable (13), and the lower-level machine (14) is connected to the upper-level machine (15) via a data transmission cable (13).

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