Mine slurry filling device and filling method

Abstract

The invention provides a mine slurry filling device and method. The mine slurry filling device comprises a filling station used for preparing filling slurry; the filling pipeline comprises an input pipe section and an output pipe section, an outlet of the input pipe section is connected with an inlet of the output pipe section through a mixer, and the mixer is used for mixing materials introduced into the mixer; the filling relay station and the mixer are both adjacent to the filling area; the filling relay equipment is located at the filling relay station and comprises a quick-setting material stirring tank, an adding pump and an adding pipeline, the quick-setting material stirring tank is used for stirring the quick-setting material, an outlet of the quick-setting material stirring tank is connected with an inlet of the adding pump, and an outlet of the adding pump is communicated with the adding opening of the mixer through the adding pipeline. Therefore, according to the mine slurry filling device disclosed by the invention, the filling slurry with the quick-setting material can be conveniently introduced into the filling area for filling.

Description

Technical Field

[0001] This invention relates to the field of mining technology, and specifically to a mine slurry filling device and filling method. Background Technology

[0002] With the increasing emphasis placed on environmental and ecological protection by the state, green mining is the inevitable path for coal mining. Backfilling mining is one of the most important green technologies, and its application is continuously expanding in both breadth and depth. In actual operations, backfill slurry needs to be transported to the goaf through pipelines under pressure using specific backfilling methods. However, if the slurry sets too quickly, it is prone to initial setting within long transport pipelines, leading to pipeline blockage; if it sets too slowly, it will not form effective strength to support the roof for a long time, consuming a significant amount of mining time and reducing recovery efficiency. The main components of backfill slurry are coal gangue (or tailings), cement, and water. The setting speed and strength of the slurry are usually improved by adjusting the amount of cement and water. However, in practice, this adjustment method presents significant contradictions: increasing the cement content to improve the setting speed and strength of the backfill often leads to increased slurry viscosity, decreased fluidity, and a sharp increase in cost; increasing the water content to optimize fluidity dilutes the slurry concentration, resulting in slow setting speed and insufficient strength of the backfill. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of the present invention provide a mine slurry filling device and a filling method.

[0004] The mine slurry filling device of this invention includes: A filling station, wherein the filling station is used to prepare filling slurry; A filling pipeline, comprising an input pipe section and an output pipe section, wherein the inlet of the input pipe section is connected to the filling station, the filling station being used to introduce filling slurry into the filling pipeline, the outlet of the output pipe section being connected to the casing inside the borehole in the filling area, and the outlet of the input pipe section being connected to the inlet of the output pipe section via a mixer, the mixer being used to mix the material introduced therein; A filling relay station, wherein both the filling relay station and the mixer are adjacent to the filling area; A filling relay device is located at the filling relay station. The filling relay device includes a quick-setting material mixing tank, an addition pump, and an addition pipeline. The quick-setting material mixing tank is used to mix quick-setting materials. The outlet of the quick-setting material mixing tank is connected to the inlet of the addition pump. The outlet of the addition pump is connected to the feeding port of the mixer through the addition pipeline.

[0005] Therefore, the mine slurry filling device according to the present invention can facilitate the introduction of filling slurry containing quick-setting materials into the filling area for filling.

[0006] In some embodiments, there are multiple quick-setting material mixing tanks, and the multiple quick-setting material mixing tanks may be selectively connected to the addition pump.

[0007] In some embodiments, the inlet of the additive pump is connected to the outlet pipeline of a plurality of the quick-setting material mixing tanks via a reversing valve.

[0008] In some embodiments, the added pipeline is provided with a flow regulating valve and a first pressure gauge.

[0009] In some embodiments, a second pressure gauge is provided on the input section of the filling pipeline; A third pressure gauge is installed on the output section of the filling pipeline.

[0010] In some embodiments, the mixer includes The housing has a first inlet, a first outlet and a filling port, the input section of the filling pipeline is connected to the first inlet, the output section of the filling pipeline is connected to the first outlet, and the filling port is connected to the adding pipeline. A screw, which is rotatably disposed within the housing, and is provided with helical conveying blades; A driver that drives the screw to rotate via a transmission rod.

[0011] In some embodiments, when the pressure reading on the third pressure gauge is greater than the pressure reading on the second pressure gauge by a first preset value, the drive is turned off or the drive speed is reduced; and / or The outlet of the output pipe section is equipped with a shut-off valve and a relief valve. When the pressure displayed on the third pressure gauge reaches the preset filling pressure value, the shut-off valve closes, the filling station stops supplying filling slurry into the filling pipeline, the relief valve opens, and the filling pipeline is cleaned; and / or The feed inlet of the mixer is equipped with a one-way valve. By adjusting the flow regulating valve, the pressure reading of the first pressure gauge is made greater than or equal to the pressure reading of the second pressure gauge.

[0012] In some embodiments, the filling station is located on the ground; and / or The filling relay station is a roadway adjacent to the filling area; and / or The distance between the mixer and the outlet of the filling pipeline is greater than or equal to 2 meters and less than or equal to 10 meters.

[0013] The present invention also proposes a filling method using the above-mentioned mine slurry filling device, comprising the following steps: S1. Drill a hole to the filling area, install a casing in the drill hole, and connect the outlet of the output pipe section of the filling pipeline to the casing. S2. The filling station prepares filling slurry without accelerated setting material and introduces it into the filling pipeline. The accelerated setting material is put into the accelerated setting material mixing tank according to the design ratio and stirred. The accelerated setting material that has been stirred is introduced into the mixer on the filling pipeline through the addition pump and the addition pipeline, so that the accelerated setting material and the filling slurry are mixed and then introduced into the filling area. S3. When the pressure in the output section of the filling pipeline reaches the designed filling pressure, stop feeding the filling slurry into the filling pipeline and clean the filling pipeline.

[0014] In some embodiments, during step S2, The additive pump is fed in turn by multiple mixing tanks containing the quick-setting material; and / or The pressure in the adding pipeline is greater than or equal to the pressure in the input section of the filling pipeline; and / or During the delivery of the filling slurry, the pressure in the input section and the pressure in the output section of the filling pipeline are controlled to be equal or substantially equal; and / or When the pressure in the output pipe section is greater than the first preset pressure in the input pipe section, the flow of filling slurry into the output pipe section is stopped or the flow rate of filling slurry into the output pipe section is reduced. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a mine slurry filling device according to an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of a mixer according to an embodiment of the present invention.

[0017] Reference numerals: 1. Pump addition; 11. Piping addition; 2. First mixing tank; 3. Second mixing tank; 41. Reversing valve; 42. Flow regulating valve; 43. Shut-off valve; 5. Drilling hole; 6. Filling pipeline; 61. Input pipe section; 62. Output pipe section; 71. First pressure gauge; 72. Second pressure gauge; 73. Third pressure gauge; 8. Mixer; 81. Check valve; 82. Screw; 83. Actuator; 84. Drive rod. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] The following description, with reference to the accompanying drawings, describes a mine slurry filling device according to an embodiment of the present invention. Figure 1 and Figure 2 As shown, the mine slurry filling device according to an embodiment of the present invention includes a filling station, a filling pipeline 6, a filling relay station, and a filling relay device.

[0020] A filling station is used to prepare filling slurry. Specifically, the filling station prepares filling slurry without quick-setting materials. For example, the filling station is located on the ground to provide sufficient space for preparing the filling slurry.

[0021] The filling pipeline 6 includes an input pipe section 61 and an output pipe section 62. The inlet of the input pipe section 61 is connected to the filling station, which is used to introduce filling slurry into the filling pipeline 6. The outlet of the output pipe section 62 is connected to the casing in the borehole 5 of the filling area.

[0022] Both the filling relay station and the mixer 8 are located near the filling area. Specifically, the filling relay station is a roadway adjacent to the filling area, that is, the existing roadway space near the filling area is used as the filling relay station, thereby saving engineering work.

[0023] The filling relay equipment is located at the filling relay station. The equipment includes a quick-setting material mixing tank, an addition pump 1, and an addition pipeline 11. The quick-setting material mixing tank is used to mix the quick-setting material. The outlet of the quick-setting material mixing tank is connected to the inlet of the addition pump 1. The outlet of the addition pump 1 is connected to the feeding port of the mixer 8 through the addition pipeline 11. The outlet of the input pipeline 61 is connected to the inlet of the output pipeline 62 through the mixer 8. The mixer 8 is used to mix the material fed into it.

[0024] According to an embodiment of the present invention, when the mine slurry filling device transports filling slurry to the filling area over a long distance, a filling slurry without quick-setting material can be prepared first at the filling station. Then, the filling slurry without quick-setting material is introduced into the input pipe section 61. Quick-setting material is introduced into the quick-setting material mixing tank according to the designed ratio, and then introduced into the addition pipe 11 via the addition pump 1. The filling slurry without quick-setting material in the input pipe section 61 and the quick-setting material in the addition pipe 11 are mixed in the mixer 8, so that the filling slurry containing quick-setting material can be introduced into the filling area from the output pipe section 62, thereby facilitating the filling of the filling area.

[0025] Furthermore, since both the filling relay station and the mixer 8 are located near the filling area, the length of the output pipe section 62 can be relatively short, allowing the filling slurry with quick-setting material to be quickly introduced into the filling area. It is less likely to be blocked in the output pipe section 62, and the solidification speed and strength of the filling slurry introduced into the filling area can be accelerated.

[0026] Therefore, the mine slurry filling device according to the present invention can facilitate the introduction of filling slurry containing quick-setting materials into the filling area for filling.

[0027] In some embodiments, the distance between the outlet of the mixer 8 and the filling pipe 6 is greater than or equal to 2 meters and less than or equal to 10 meters. This allows the mixer 8 to be located close to the filling area so that the filling slurry containing the quick-setting material can be quickly introduced into the filling area. For example, the distance between the outlet of the mixer 8 and the filling pipe 6 can be 3 meters, 4 meters, 5 meters, or 6 meters.

[0028] like Figure 1 As shown, in some embodiments, there are multiple quick-setting material mixing tanks, which can be selectively connected to the addition pump 1. This allows the multiple quick-setting material mixing tanks to continuously feed the mixed quick-setting material into the addition pump 1, thereby continuously adding quick-setting material to the filling slurry in the filling pipeline 6.

[0029] In some embodiments, the inlet of the additive pump 1 is connected to the outlet pipes of multiple quick-setting material mixing tanks via a reversing valve 41. Specifically, the outlet of the reversing valve 41 is connected to the inlet of the additive pump 1, and the reversing valve 41 can switch the inlet to connect to the outlet pipes of different quick-setting material mixing tanks, thereby allowing different quick-setting material mixing tanks to introduce quick-setting material into the additive pump 1. For example, the outlet pipes of the multiple quick-setting material mixing tanks, including a first mixing tank 2 and a second mixing tank 3, are connected to the reversing valve 41, and the reversing valve 41 can be selectively connected to one of the first mixing tank 2 and the second mixing tank 3.

[0030] like Figure 1 As shown, in some embodiments, the adding pipeline 11 is equipped with a flow regulating valve 42 and a first pressure gauge 71. The first pressure gauge 71 can monitor the delivery pressure in the adding pipeline 11, and the flow regulating valve 42 can adjust the delivery flow rate of the adding pipeline 11, thereby adjusting the delivery pressure in the adding pipeline 11.

[0031] like Figure 1 As shown, in some embodiments, a second pressure gauge 72 is provided on the input section 61 of the filling pipeline 6, which can monitor the delivery pressure in the input section 61 of the filling pipeline 6. A third pressure gauge 73 is provided on the output section 62 of the filling pipeline 6, which can monitor the delivery pressure in the output section 62 of the filling pipeline 6.

[0032] like Figure 2As shown, in some embodiments, the mixer 8 includes a housing, a screw 82, and a driver 83. The housing has a first inlet, a first outlet, and a feeding port. The input section 61 of the filling pipeline 6 is connected to the first inlet, the output section 62 of the filling pipeline 6 is connected to the first outlet, and the feeding port is connected to the feeding pipeline 11. The screw 82 is rotatably disposed within the housing and is provided with helical conveying blades. The driver 83 drives the screw 82 to rotate via a transmission rod 84. When the screw 82 rotates, it drives the helical conveying blades to rotate. The rotation of the helical conveying blades facilitates the mixing of the filling slurry and the quick-setting material and conveys them towards the first outlet so that the filling slurry mixed with the quick-setting material can be introduced into the output section 62 of the filling pipeline 6. For example, the driver 83 is a motor.

[0033] In some embodiments, the feed inlet of the mixer 8 is provided with a one-way valve 81. By adjusting the flow regulating valve 42, the pressure displayed on the first pressure gauge 71 is made greater than or equal to the pressure displayed on the second pressure gauge 72. Specifically, the delivery pressure of the feed line 11 is equal to or slightly greater than the pressure in the input section 61 of the filling line 6, so that the quick-setting material in the feed line 11 can pass through the one-way valve 81 and enter the mixer 8.

[0034] In some embodiments, when the pressure displayed on the third pressure gauge 73 is greater than a first preset value of the pressure displayed on the second pressure gauge 72, the actuator 83 is turned off or its rotation speed is reduced. Specifically, when the delivery pressure in the output section 62 of the filling pipeline 6 is greater than a first preset value of the delivery pressure in the input section 61 of the filling pipeline 6, i.e., the delivery pressure in the output section 62 of the filling pipeline 6 is high, the filling slurry flowing into the output section 62 can be reduced by turning off the actuator 83 or reducing its rotation speed. This helps alleviate the delivery pressure in the output section 62 of the filling pipeline 6 and prevents blockage or flow interruption in the output section 62 of the filling pipeline 6.

[0035] The present invention also proposes a filling method using a mine slurry filling device according to an embodiment of the present invention, the mine slurry filling method according to an embodiment of the present invention includes the following steps: S1. Drill borehole 5 to the filling area, install a casing in borehole 5, and connect the outlet of the output section 62 of the filling pipeline 6 to the casing. Specifically, first, drill the filling directional borehole 5 to the empty area to be filled according to the design requirements, install the casing, install the borehole connection device, and connect it to the filling pipeline 6.

[0036] S2. The filling station prepares filling slurry without accelerated setting material and introduces it into filling pipeline 6. Accelerated setting material is added to the accelerated setting material mixing tank according to the design ratio and stirred. The stirred accelerated setting material is then introduced into the mixer 8 on filling pipeline 6 using the addition pump 1 and addition pipeline 11, so that the accelerated setting material and filling slurry are mixed before being introduced into the filling area. This allows the accelerated setting material and filling slurry to be mixed near the filling area before being introduced into the filling area, thus preventing the filling slurry from clogging within filling pipeline 6.

[0037] In some embodiments, in step S2, multiple quick-setting material mixing tanks are used to feed the addition pump 1 in turn, thereby facilitating a continuous supply of quick-setting material to the filling pipeline 6. For example, quick-setting material is added to the first mixing tank 2 and the third mixing tank 3 according to the design ratio and stirred evenly. At the same time, the ground filling station prepares filling slurry without quick-setting material, and the ground filling station transports the prepared filling slurry to the filling borehole 5 through the filling pipeline 6 for filling the empty area. When the pointers of the second pressure gauge 72 and the third pressure gauge 73 on the filling pipeline 6 show obvious oscillation, it indicates that the filling slurry has reached the position of the pressure gauge from the pipeline. At this time, the quick-setting material addition pump 1 is immediately started, and the reversing valve 41 of the suction pipe is adjusted to any quick-setting material mixing tank (first mixing tank 2 or third mixing tank 3) to draw in the quick-setting material. When the quick-setting material in any mixing tank has been drawn in by the addition pump 1, the reversing valve 41 is immediately adjusted to switch to another mixing tank for drawing. At the same time, quick-setting material is prepared in the emptied mixing tank. This process is repeated until the filling is complete.

[0038] In some embodiments, in step S2, the pressure in the addition pipeline 11 is greater than or equal to the pressure in the input section 61 of the filling pipeline 6. Specifically, the quick-setting material is pressurized by the suction of the addition pump 1 and enters the electric spiral mixer 8 through the one-way valve 81 to mix with the slurry in the filling pipeline 6. By adjusting the flow regulating valve 42, the readings of the first pressure gauge 71 and the second pressure gauge 72 of the addition pipeline 11 of the addition pump 1 are made the same or slightly higher, ensuring that the quick-setting material can force open the one-way valve 81 and enter the filling pipeline 6 (mixer 8).

[0039] In some embodiments, during step S2, when conveying the filling slurry, the pressure in the input section 61 and the pressure in the output section 62 of the filling pipeline 6 are controlled to be equal or substantially equal. To prevent blockage caused by resistance in the mixer 8, and to ensure thorough mixing of the filling slurry and the quick-setting material, the driver 83 is turned on, driving the screw 82 to rotate and stir via the transmission rod 84, ensuring thorough mixing and smooth flow of the filling slurry and quick-setting material. The second pressure gauge 72 and the third pressure gauge 73 are observed, keeping their readings the same or close.

[0040] In some embodiments, in step S2, when the pressure in the output pipe section 62 is greater than a first preset pressure in the input pipe section 61, the flow of filling slurry into the output pipe section 62 is stopped or the flow rate of filling slurry into the output pipe section 62 is reduced. Specifically, if the reading of the third pressure gauge 73 is much greater than that of the second pressure gauge 72, the rotation speed of the driver 83 should be stopped or reduced to prevent the slurry in the filling pipe 6 from being interrupted.

[0041] S3. When the pressure in the output section 62 of the filling pipeline 6 reaches the designed filling pressure, stop the flow of filling slurry into the filling pipeline 6 and clean the filling pipeline 6. Specifically, a shut-off valve 43 and a drain valve are provided at the outlet of the output section 62. When the pressure displayed on the third pressure gauge 73 reaches the preset filling pressure value, the shut-off valve 43 closes, the filling station stops the flow of filling slurry into the filling pipeline 6, the drain valve is opened, and the filling pipeline 6 is cleaned. Specifically, when the third pressure gauge 73 reaches the designed filling pressure, the ground filling station is notified to stop filling, the shut-off valve 43 is closed to prevent the slurry from flowing back into the filling borehole 5; at the same time, the drain valve is opened to clean the filling pipeline 6, and the cleaning water flows out through the drain valve, is settled in the sedimentation tank, and then discharged into the water tank.

[0042] Therefore, the mine slurry filling device according to the present invention adds the quick-setting material directly at a location adjacent to the filling zone in the filling pipe 6, which is simple in process and requires less equipment. This facilitates the introduction of filling slurry containing quick-setting material into the filling zone for filling. This enables long-distance transportation of the filling slurry. Adding the quick-setting material near the outlet of the filling pipe ensures uniform mixing of the filling slurry and the quick-setting material, allowing it to flow smoothly along the channel, guaranteeing the smooth delivery of the filling slurry to the filling voids, and rapid solidification, thus ensuring the strength of the filled solid.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A mine slurry filling device, characterized in that, include: A filling station, wherein the filling station is used to prepare filling slurry; A filling pipeline, comprising an input pipe section and an output pipe section, wherein the inlet of the input pipe section is connected to the filling station, the filling station being used to introduce filling slurry into the filling pipeline, the outlet of the output pipe section being connected to the casing inside the borehole in the filling area, and the outlet of the input pipe section being connected to the inlet of the output pipe section via a mixer, the mixer being used to mix the material introduced therein; A filling relay station, wherein both the filling relay station and the mixer are adjacent to the filling area; A filling relay device is located at the filling relay station. The filling relay device includes a quick-setting material mixing tank, an addition pump, and an addition pipeline. The quick-setting material mixing tank is used to mix quick-setting materials. The outlet of the quick-setting material mixing tank is connected to the inlet of the addition pump. The outlet of the addition pump is connected to the feeding port of the mixer through the addition pipeline.

2. The mine slurry filling device according to claim 1, characterized in that, There are multiple quick-setting material mixing tanks, and these multiple quick-setting material mixing tanks can be selectively connected to the addition pump.

3. The mine slurry filling device according to claim 2, characterized in that, The inlet of the additive pump is connected to the outlet pipeline of multiple quick-setting material mixing tanks via a reversing valve.

4. The mine slurry filling device according to claim 1, characterized in that, The added pipeline is equipped with a flow regulating valve and a first pressure gauge.

5. The mine slurry filling device according to claim 4, characterized in that, A second pressure gauge is provided on the input pipe section of the filling pipeline; A third pressure gauge is installed on the output section of the filling pipeline.

6. The mine slurry filling device according to claim 5, characterized in that, The mixer includes The housing has a first inlet, a first outlet and a filling port, the input section of the filling pipeline is connected to the first inlet, the output section of the filling pipeline is connected to the first outlet, and the filling port is connected to the adding pipeline. A screw, which is rotatably disposed within the housing, and is provided with helical conveying blades; A driver that drives the screw to rotate via a transmission rod.

7. The mine slurry filling device according to claim 6, characterized in that, When the pressure reading on the third pressure gauge is greater than the pressure reading on the second pressure gauge by a first preset value, the actuator is turned off or the actuator speed is reduced; and / or The outlet of the output pipe section is equipped with a shut-off valve and a relief valve. When the pressure displayed on the third pressure gauge reaches the preset filling pressure value, the shut-off valve closes, the filling station stops supplying filling slurry into the filling pipeline, the relief valve opens, and the filling pipeline is cleaned; and / or The feed inlet of the mixer is equipped with a one-way valve. By adjusting the flow regulating valve, the pressure reading of the first pressure gauge is made greater than or equal to the pressure reading of the second pressure gauge.

8. The mine slurry filling device according to any one of claims 1-7, characterized in that, The filling station is located on the ground; and / or The filling relay station is a roadway adjacent to the filling area; and / or The distance between the mixer and the outlet of the filling pipeline is greater than or equal to 2 meters and less than or equal to 10 meters.

9. A filling method using a mine slurry filling device according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Drill a hole to the filling area, install a casing in the drill hole, and connect the outlet of the output pipe section of the filling pipeline to the casing. S2. The filling station prepares filling slurry without accelerated setting material and introduces it into the filling pipeline. The accelerated setting material is put into the accelerated setting material mixing tank according to the design ratio and stirred. The accelerated setting material that has been stirred is introduced into the mixer on the filling pipeline through the addition pump and the addition pipeline, so that the accelerated setting material and the filling slurry are mixed and then introduced into the filling area. S3. When the pressure in the output section of the filling pipeline reaches the designed filling pressure, stop feeding the filling slurry into the filling pipeline and clean the filling pipeline.

10. The method for filling mine slurry according to claim 9, characterized in that, In step S2, The additive pump is fed in turn by multiple mixing tanks containing the quick-setting material; and / or The pressure in the adding pipeline is greater than or equal to the pressure in the input section of the filling pipeline; and / or During the delivery of the filling slurry, the pressure in the input section and the pressure in the output section of the filling pipeline are controlled to be equal or substantially equal; and / or When the pressure in the output pipe section is greater than the first preset pressure in the input pipe section, the flow of filling slurry into the output pipe section is stopped or the flow rate of filling slurry into the output pipe section is reduced.

Images