Coal mine roadway filling system and filling method

Abstract

The present application relates to the technical fields of mineral resources exploitation, and provides a coal mine roadway filling system and a filling method.The coal mine roadway filling system comprises a filling body height measuring device, a filling device and a monitoring control module.The filling body height measuring device is arranged in the roadway to detect the accumulated height of the filling body in the roadway.The filling device comprises a plurality of filling body storage bins and a premixing bin.The plurality of filling body storage bins are used to store different types of filling bodies.The premixing bin is provided with a plurality of feeding ports and at least one discharging port.The premixing bin is in communication with the plurality of filling body storage bins through the feeding ports and in communication with the roadway through the discharging port.The monitoring control module comprises a signal acquisition unit, a calculation unit and a control unit.The coal mine roadway filling system can monitor the accumulated height of the filling body through the filling body height measuring device, and can adjust the feeding speed and the discharging speed through the control unit to realize automatic filling of the roadway.

Description

Technical Field

[0001] This invention relates to the field of mineral resource extraction technology, and in particular to a coal mine roadway filling system and filling method. Background Technology

[0002] During coal mining, solid waste such as coal gangue and fly ash is generated. Related technologies typically employ coal mine backfilling to handle this solid waste. Specifically, coal mine backfilling involves pumping the coal gangue, fly ash, and other solid waste generated during coal mining through pumps and pipelines to locations such as the goaf. This effectively disposes of the solid waste generated during mining and fills the goaf to prevent surface subsidence.

[0003] The filling process in coal mines requires personnel to monitor the filling height in the goaf throughout the entire process and operate the filling pump, which is time-consuming and labor-intensive. Summary of the Invention

[0004] This invention provides a coal mine roadway filling system and method to solve the problem in the prior art that it is time-consuming and labor-intensive to have personnel monitor the filling height in the goaf and operate the filling pump throughout the coal mine filling process.

[0005] In a first aspect, the present invention provides a coal mine roadway filling system, comprising:

[0006] A filling height measuring device is used to be installed in a roadway to detect the cumulative height of the filling in the roadway;

[0007] A filling device includes multiple filling material storage bins and a premixing bin. Each filling material storage bin is used to store different types of filling materials. The premixing bin is provided with multiple inlets and at least one outlet. The multiple filling material storage bins correspond one-to-one with the multiple inlets, and each filling material storage bin is connected to the corresponding inlet. The at least one outlet is connected to the tunnel.

[0008] The monitoring and control module includes a signal acquisition unit, a calculation unit, and a control unit. The premixing bin and the filling material height measuring device are both electrically connected to the signal acquisition unit, which acquires the feeding speed at the inlet, the discharge speed at the outlet, and the cumulative height of the filling material. The calculation unit is electrically connected to the signal acquisition unit and calculates the filling material contact time. The premixing bin and the calculation unit are both electrically connected to the control unit and control the feeding speed and the discharge speed.

[0009] The coal mine roadway filling system provided by the present invention includes a filling body height measuring device comprising:

[0010] A measuring rod, which is used to be vertically installed in the tunnel;

[0011] The measuring circuit includes a resistance detector, a resistance array, and multiple magnetic induction switches; the resistance detector is provided with a first electrode and a second electrode; one end of the resistance array is electrically connected to the first electrode; one end of each of the multiple magnetic induction switches is connected to a different position of the resistance array, and the other end is electrically connected to the second electrode; the magnetic induction switches are spaced apart along the measuring rod.

[0012] A float is slidably mounted on the measuring rod, and the float is provided with an abutment and a magnetic component; the abutment is used to abut against the top of the filling material.

[0013] According to the coal mine roadway filling system provided by the present invention, the filling body height measuring device further includes a fixing component, which is disposed at the top and bottom of the measuring rod and is used for installation and fixing to the top and bottom of the roadway, respectively.

[0014] According to the coal mine roadway filling system provided by the present invention, the fixing component includes a mounting top plate, a mounting bottom plate, and a top anchor bolt;

[0015] The mounting plate is connected to the top of the measuring rod, one end of the top anchor rod is fixedly connected to the mounting plate, and the other end is used to be inserted into the top of the tunnel;

[0016] The mounting base plate is connected to the bottom end of the measuring rod and is used to be installed at the bottom of the tunnel.

[0017] According to the coal mine roadway filling system provided by the present invention, the top end of the measuring rod is provided with a plug-in hole; one side of the mounting plate is provided with a protrusion adapted to the plug-in hole; the protrusion is inserted into the plug-in hole.

[0018] According to the coal mine roadway filling system provided by the present invention, the resistor array includes a plurality of measuring resistors connected in series, and the magnetic induction switch corresponds one-to-one with the measuring resistor. The end of each resistor away from the first electrode is electrically connected to the second electrode through the corresponding magnetic induction switch.

[0019] According to the coal mine roadway filling system provided by the present invention, the measuring rod is a hollow rod, and the measuring circuit is disposed in the hollow cavity of the measuring rod.

[0020] According to the coal mine roadway filling system provided by the present invention, the abutting member is an abutting plate, which can cover the bottom of the roadway.

[0021] According to the coal mine roadway filling system provided by the present invention, the filling body height measuring device further includes a conversion display, which is electrically connected to the resistance detector and is used to convert the resistance value detected by the resistance detector into the actual height value and display it.

[0022] Secondly, the present invention also provides a filling method for the coal mine roadway filling system described in any one of the above claims, comprising:

[0023] Different backfill materials are premixed and then the mixed backfill material is filled into the roadway;

[0024] During the filling process, the cumulative height of the filling material in the roadway, the feeding rate of different filling materials and the discharge rate of the mixed filling material are monitored, and the time of the filling material reaching the roof is calculated.

[0025] Based on the cumulative height of the backfill material in the roadway and the calculated time for the backfill material to reach the roof, adjust the mix ratio of different backfill materials and the filling rate in the roadway.

[0026] The coal mine roadway filling system of this invention features multiple filling material storage bins to store different types of filling materials. These materials are then introduced into a premixing bin for premixing, ensuring uniform mixing of filling materials of varying sizes. Smaller filling materials can fill the gaps between larger ones, maximizing the use of roadway space. Simultaneously, a filling material height measuring device is installed in the roadway to monitor the cumulative height of the accumulated filling materials during the filling process. This monitoring data is then transmitted to a signal acquisition unit, which converts the collected cumulative height of the filling materials and the data from each premixing bin into numerical values. The feed rate at the inlet and the discharge rate at the outlet are sent to the calculation unit, which then processes this data to obtain data such as the time it takes for the filling material to reach the roof, and sends this data to the control unit. The control unit adjusts the feed rate and discharge rate of the premixing bin based on this data, thereby adjusting the proportion of various filling materials and the filling speed of the filling material in the roadway, so that the filling material can eventually fill the entire roadway, realizing automatic filling of the roadway. This effectively solves the problem in the existing technology that requires personnel to monitor the filling height in the goaf and operate the filling pump throughout the coal mine filling process, which is time-consuming and labor-intensive. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1This is a system diagram of the coal mine roadway filling system provided in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the filling body height measuring device provided in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the mounting top plate provided in an embodiment of the present invention;

[0031] Figure 4 This is a flowchart of the filling method of the coal mine roadway filling system provided in the embodiments of the present invention.

[0032] Figure label:

[0033] 1. Filling height measuring device; 2. Filling device; 3. Monitoring and control module; 4. Roadway;

[0034] 11. Measuring rod; 12. Float; 13. Fixing assembly; 14. Converter display;

[0035] 111. Socket;

[0036] 131. Install the top plate; 132. Install the bottom plate; 133. Top anchor bolts; 134. Protrusions;

[0037] 21. Filler storage bin; 22. Premix bin;

[0038] 31. Signal acquisition unit; 32. Calculation unit; 33. Control unit. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0040] In the description of the embodiments of the present invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] The following is combined with Figures 1 to 3 This invention describes a coal mine roadway filling system.

[0043] like Figure 1 and Figure 2 As shown, the coal mine roadway filling system of the present invention includes: a filling body height measuring device 1, a filling device 2, and a monitoring and control module 3; the filling body height measuring device 1 is used to be installed in the roadway 4 to detect the cumulative height of the filling body in the roadway 4; the filling device 2 includes multiple filling body storage bins 21 and a premixing bin 22, each filling body storage bin 21 being used to store different types of filling bodies; the premixing bin 22 is provided with multiple feed inlets and at least one discharge outlet; the premixing bin 22 is connected to the multiple filling body storage bins 21 through the feed inlets and connected to the roadway 4 through the discharge outlet; the multiple filling body storage bins 21 and the multiple feed inlets are paired one-to-one. Each filling material storage bin 21 is connected to a corresponding inlet, and at least one outlet is connected to the tunnel 4; the monitoring and control module 3 includes a signal acquisition unit 31, a calculation unit 32, and a control unit 33; the premixing bin 22 and the filling material height measuring device 1 are both electrically connected to the signal acquisition unit 31, which is used to acquire the feeding speed of the inlet, the discharge speed of the outlet, and the cumulative height of the filling material; the calculation unit 32 is electrically connected to the signal acquisition unit 31 and is used to calculate the filling material contact time; the premixing bin 22 and the calculation unit 32 are both electrically connected to the control unit 33 and are used to control the feeding speed and the discharge speed.

[0044] In this embodiment, multiple backfill storage bins 21 are set up to store different types of backfill materials, which are typically solid wastes such as coal gangue and fly ash generated during coal mining. These solid wastes may be in block or granular form and vary in size. Different types of backfill materials are premixed in a certain ratio by being introduced from each backfill storage bin 21 into a premixing bin 22. This ensures uniform mixing of the various backfill materials, reducing space requirements. Specifically, smaller backfill materials can be filled between larger ones, making the mixed backfill material more compact during filling and reducing space requirements, allowing the roadway 4 to accommodate as many backfill materials as possible. Simultaneously, a backfill height measuring device 1 is installed in the roadway 4 to monitor the cumulative height of the accumulated backfill materials and record the current cumulative height. The height data is sent to the signal acquisition unit 31. The signal acquisition unit 31 also collects the feeding speed of each inlet and the discharge speed of each outlet of the premixing bin 22, and transmits this data to the calculation unit 32. The calculation unit 32 can calculate the remaining space of the current tunnel 4 based on the cumulative height of the filling material, and calculate the proportion of various filling materials based on the feeding speed of each inlet of the premixing bin 22. Then, it calculates the filling speed of the filling material in the tunnel 4 based on the proportion of various filling materials and the discharge speed of the outlet. Based on the filling speed and the remaining space of the tunnel 4, the filling material contact time can be calculated. After the calculation unit 32 transmits the filling material contact time and other data to the control unit 33, the control unit 33 can adjust the feeding speed and discharge speed based on the filling material contact time and other data so that the filling material can eventually fill the entire tunnel 4. For example, when the accumulated height of the filling material is high, the remaining space height of the tunnel 4 is low. The control unit 33 then reduces the feeding speed of the large pieces of filling material and increases the feeding speed of the small pieces of filling material or granular filling material, thereby increasing the proportion of small pieces of filling material or granular filling material in the mixed filling material and preventing large pieces of filling material from getting stuck in the tunnel 4 and causing blockage.

[0045] The coal mine roadway filling system of the present invention uses multiple filling material storage bins 21 to store different types of filling materials, and introduces different types of filling materials into a premixing bin 22 for premixing, so that filling materials of different sizes can be mixed evenly, and small-volume filling materials can fill the gaps between large-volume filling materials, making full use of the space of the roadway 4. At the same time, by installing a filling material height measuring device 1 in the roadway 4, the system monitors the cumulative height of the filling materials accumulated in the roadway 4 during the filling process, and sends the current monitoring data to a signal acquisition unit 31. The signal acquisition unit 31 transmits the collected cumulative height of the filling materials and the data from each of the premixing bins 22. The feed rate at the inlet and the discharge rate at the outlet are sent to the calculation unit 32. The calculation unit 32 then processes these data to obtain data including the time of the filling material reaching the roof, and sends it to the control unit 33. The control unit 33 adjusts the feed rate and discharge rate of the premixing bin 22 based on these data, thereby adjusting the proportion of various filling materials and the filling speed of the filling material in the roadway 4, so that the filling material can eventually fill the entire roadway 4, realizing automatic filling of the roadway 4. This effectively solves the problem in the existing technology that it is time-consuming and labor-intensive to have personnel monitor the filling height in the goaf and operate the filling pump throughout the coal mine filling process.

[0046] Specifically, in some embodiments, such as Figure 2 As shown, the filling height measuring device 1 includes: a measuring rod 11, a measuring circuit, and a float 12; the measuring rod 11 is vertically installed in the tunnel 4; the measuring circuit includes a resistance detector, a resistance array, and multiple magnetic induction switches; the resistance detector is provided with a first electrode and a second electrode; one end of the resistance array is electrically connected to the first electrode; one end of the multiple magnetic induction switches is connected to different positions of the resistance array, and the other end is electrically connected to the second electrode; the magnetic induction switches are spaced apart along the measuring rod 11; the float 12 is slidably installed on the measuring rod 11, and the float 12 is provided with an abutment and a magnetic element; the abutment is used to abut against the top of the filling material.

[0047] In this embodiment, by slidably mounting the float 12 on the measuring rod 11 and providing an abutment on the float 12, when filling the tunnel 4 with filler, the top of the filler abuts against the abutment, and the filler continuously accumulates, lifting the float 12 so that it moves along the measuring rod 11. Simultaneously, the float 12 is equipped with a magnetic element, and multiple magnetic induction switches are spaced apart on the measuring rod 11. The magnetic element on the float 12 causes the magnetic induction switches at corresponding heights to close, while the magnetic induction switches at other positions remain open, thereby enabling the resistance detector, a portion of the resistance array, and the closed... The closed magnetic induction switch can form a loop, enabling the resistance detector to detect the resistance value of the resistance column currently connected to the loop. When the float 12 moves to different positions on the measuring rod 11, the closed magnetic induction switch is different, the total resistance of the resistance column connected to the loop is different, and thus the resistance reading of the resistance detector is different. By the resistance reading of the resistance detector, the currently closed magnetic induction switch can be determined. By the height of the currently closed magnetic induction switch, the current height of the float 12 can be obtained, and then the cumulative height of the filling material in the current tunnel 4 can be obtained.

[0048] Specifically, the magnetic induction switch is a Hall switch.

[0049] In some embodiments, such as Figure 2 As shown, the filling height measuring device 1 also includes a fixing component 13, which is disposed at the top and bottom of the measuring rod 11 and is used for installation and fixing to the top and bottom of the roadway 4, respectively.

[0050] In this embodiment, since the filler is all solid, the impact force on the measuring rod 11 is large when it is filled into the tunnel 4. By setting the fixing components 13 at the top and bottom of the measuring rod 11 to fix the measuring rod 11 to the tunnel 4, the impact of the filler on the measuring rod 11 can be effectively avoided, which would cause the measuring rod 11 to shake or even tilt, thereby affecting the function of the filling height measuring device 1 and making the filling height measuring device 1 more stable.

[0051] In some embodiments, such as Figure 2 As shown, the fixing assembly 13 includes a mounting top plate 131, a mounting bottom plate 132, and a top anchor rod 133; the mounting top plate 131 is connected to the top end of the measuring rod 11, one end of the top anchor rod 133 is fixedly connected to the mounting top plate 131, and the other end is used to be inserted into the top of the tunnel 4; the mounting top plate 131 is connected to the bottom end of the measuring rod 11 and is used to be set at the bottom of the tunnel 4.

[0052] In this embodiment, by setting a mounting plate 131 at the top of the measuring rod 11 and connecting a top anchor rod 133 to the mounting plate 131, the top anchor rod 133 is inserted into the top of the roadway 4. While fixing the top of the measuring rod 11 and the mounting plate 131 to the top of the roadway 4, the top anchor rod 133 can also provide a certain support for the top of the roadway 4, making the structure of the roadway 4 more stable. At the same time, by setting a mounting base plate 132 at the bottom of the measuring rod 11, the mounting base plate 132 is set at the bottom of the roadway 4, thereby increasing the contact area between the filling height measuring device 1 and the bottom of the roadway 4, which is beneficial to improving the stability of the filling height measuring device 1.

[0053] In some embodiments, such as Figure 2 and Figure 3 As shown, the top of the measuring rod 11 has a plug hole 111; one side of the mounting plate 131 has a protrusion 134 that matches the plug hole 111; the protrusion 134 is inserted into the plug hole 111.

[0054] In this embodiment, by opening a plug hole 111 at the top of the measuring rod 11 and constructing a protrusion 134 on one side of the mounting top plate 131, the protrusion 134 and the plug hole 111 are inserted into each other to fix the measuring rod 11 and the mounting top plate 131. The structure is simple and highly practical.

[0055] It is easy to understand that in some embodiments, a plug hole 111 is also provided at the bottom end of the measuring rod 11. Correspondingly, a protrusion 134 adapted to the plug hole 111 is also constructed on one side of the mounting base plate 132. The protrusion 134 is inserted into the plug hole 111 to fix the measuring rod 11 and the mounting base plate 132.

[0056] In some embodiments, the resistor array includes a plurality of measuring resistors connected in series, with a magnetic induction switch corresponding to each measuring resistor, and the end of each resistor furthest from the first electrode is electrically connected to the second electrode through a corresponding magnetic induction switch.

[0057] In this embodiment, when the float 12 moves along the measuring rod 11, the magnetic component of the float 12 causes the magnetic induction switch corresponding to the current height of the float 12 to close, while other magnetic induction switches open. This connects the first electrode, the measuring resistor between the first electrode and the currently closed magnetic induction switch, the currently closed magnetic induction switch, and the second electrode into a loop, allowing the resistance detector to detect the resistance value of the measuring resistor currently connected to the loop. When the float 12 moves to another height, the closed magnetic induction switch changes, and the number of measuring resistors connected to the loop also changes, thus allowing the resistance detector to measure the resistance value. Since the measuring resistors connected to the loop formed when each magnetic induction switch closes individually are different, the resistance value changes with the height of the float 12, realizing the monitoring of the cumulative height of the filler. The structure is simple and the effect is good.

[0058] In some embodiments, the measuring rod 11 is a hollow rod, and the measuring circuit is disposed in the hollow cavity of the measuring rod 11.

[0059] In this embodiment, by placing the measuring circuit inside the hollow cavity of the measuring rod 11, the measuring circuit is protected, preventing it from being exposed inside the tunnel 4 and thus avoiding damage to the electronic components from impacts by the filling material.

[0060] In some embodiments, the abutment is an abutment plate that can cover the bottom of the tunnel 4.

[0061] In this embodiment, since the filling material is a blocky solid of varying sizes and shapes, the top of the accumulated filling material may not be flat when filling the tunnel 4. This means that the contact position of the abutment is not the highest point of the currently accumulated filling material, resulting in inaccurate measurement of the cumulative height of the filling material. By enabling the abutment to cover the entire bottom of the tunnel 4, the abutment can always contact the highest point of the accumulated filling material, making the measured cumulative height of the filling material more accurate. At the same time, the abutment plate can also flatten the top of the accumulated filling material, allowing the filling material to completely fill the tunnel 4 and improving the space utilization rate within the tunnel 4.

[0062] In some embodiments, such as Figure 2 As shown, the filling height measuring device 1 also includes a conversion display 14, which is electrically connected to the resistance detector and is used to convert the resistance value detected by the resistance detector into the actual height value and display it.

[0063] On the other hand, the present invention also provides a filling method for the coal mine roadway filling system provided in any of the above embodiments. By employing the above-described coal mine roadway filling system, the filling method of the coal mine roadway filling system of the present invention also has the advantages of the above-described coal mine roadway filling system, which will not be elaborated here.

[0064] Filling methods for coal mine roadway filling systems, such as Figure 4 As shown, it includes the following steps:

[0065] Step S101: Premix different filling materials and fill the roadway with the mixed filling material.

[0066] Step S102: During the filling process, the cumulative height of the filling material in the roadway, the feeding rate of different filling materials and the discharge rate of the mixed filling material are monitored, and the time of the filling material reaching the roof is calculated.

[0067] Step S103: Based on the cumulative height of the backfill in the roadway and the calculated time for the backfill to reach the roof, adjust the mix ratio of different backfill materials and the filling rate in the roadway.

[0068] In this embodiment, different types of fillers (blocks, granules, etc.) are first stored in different filler storage bins 21, and the fillers in the different filler storage bins 21 are filled into the premixing bin 22 to premix the different fillers so that the smaller fillers can fill the gaps between the larger fillers. The mixed fillers are then fed into the tunnel 4 through the outlet of the premixing bin 22 so that the mixed fillers gradually fill the tunnel 4.

[0069] During the filling process, the filling height measuring device 1 installed in the tunnel 4 continuously measures the cumulative height of the filling and transmits the information of the cumulative height of the filling to the signal acquisition unit 31 in real time. The signal acquisition unit 31 also monitors the feeding speed of the inlet and the discharge speed of the outlet of the premixing bin 22 in real time and transmits the collected data to the calculation unit 32. The calculation unit 32 can calculate the remaining space of the tunnel 4 based on the cumulative height of the filling and calculate the proportion of various filling materials based on the feeding speed of each inlet of the premixing bin 22. Then, it calculates the filling speed of the filling in the tunnel 4 based on the proportion of various filling materials and the discharge speed of the outlet. Based on the filling speed and the remaining space of the tunnel 4, the filling material contact time can be calculated and the relevant data information is transmitted to the control unit 33.

[0070] The control unit 33 can adjust the feeding and discharging speeds based on data such as the contact time of the filling material, so that the filling material can eventually fill the entire tunnel 4. Specifically, the control unit 33 can adjust the feeding speed of each inlet of the premixing chamber 22 according to the remaining space in the tunnel 4, so as to adjust the ratio of various filling materials, so that the height of the filling material flow into the tunnel 4 is less than the height of the remaining space in the tunnel 4, avoiding the filling material from getting stuck in the tunnel 4 and causing blockage. At the same time, as the accumulated height of the filling material gradually increases, the remaining space in the tunnel 4 gradually decreases. The control unit 33 gradually reduces the discharge speed of the outlet of the premixing chamber 22 according to the contact time of the filling material and the decrease of the remaining space in the tunnel 4, so that the flow of filling material into the tunnel 4 gradually decreases, so as to gradually fill the entire tunnel 4, avoiding the filling speed being too fast, which would cause the filling material to flow back into the pipeline after the tunnel 4 is filled, causing blockage and pipeline damage.

[0071] The embodiments described above are merely illustrative, and some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement these embodiments without any creative effort.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coal mine roadway filling system, characterized in that, include: A filling height measuring device is used to be installed in a roadway to detect the cumulative height of the filling in the roadway; A filling device includes multiple filling material storage bins and a premixing bin. Each filling material storage bin is used to store different types of filling materials. The premixing bin is provided with multiple inlets and at least one outlet. The multiple filling material storage bins correspond one-to-one with the multiple inlets, and each filling material storage bin is connected to the corresponding inlet. The at least one outlet is connected to the tunnel. The monitoring and control module includes a signal acquisition unit, a calculation unit, and a control unit; the premixing bin and the filling body height measuring device are both electrically connected to the signal acquisition unit, which is used to acquire the feeding speed of the inlet, the discharge speed of the outlet, and the cumulative height of the filling body; The calculation unit is electrically connected to the signal acquisition unit and is used to calculate the contact time of the filling body; Both the premixing chamber and the computing unit are electrically connected to the control unit and are used to control the feeding speed and the discharging speed. The filling height measuring device includes: A measuring rod, which is used to be vertically installed in the tunnel; The measurement circuit includes a resistance detector, a resistor array, and multiple magnetic induction switches; The resistance detector is provided with a first electrode and a second electrode; one end of the resistor array is electrically connected to the first electrode; one end of the plurality of magnetic induction switches is connected to different positions of the resistor array, and the other end of each is electrically connected to the second electrode; the magnetic induction switches are arranged at intervals along the measuring rod; A float is slidably mounted on the measuring rod, and the float is provided with an abutment and a magnetic component; the abutment is used to abut against the top of the filling material; The measuring rod is a hollow rod, and the measuring circuit is disposed in the hollow cavity of the measuring rod; The abutment is an abutment plate, which can cover the bottom of the tunnel; When the accumulated height of the filler is high, the remaining space height in the tunnel is low. The control unit then reduces the feeding speed of large filler pieces and increases the feeding speed of small filler pieces or granular filler pieces, thereby increasing the proportion of small filler pieces or granular filler pieces in the mixed filler and preventing large filler pieces from getting stuck in the tunnel and causing blockage.

2. The coal mine roadway filling system according to claim 1, characterized in that, The filling height measuring device also includes a fixing component, which is disposed at the top and bottom of the measuring rod and is used to install and fix it to the top and bottom of the roadway, respectively.

3. The coal mine roadway filling system according to claim 2, characterized in that, The fixing assembly includes a mounting top plate, a mounting bottom plate, and a top anchor bolt; The mounting plate is connected to the top of the measuring rod, one end of the top anchor rod is fixedly connected to the mounting plate, and the other end is used to be inserted into the top of the tunnel; The mounting base plate is connected to the bottom end of the measuring rod and is used to be installed at the bottom of the tunnel.

4. The coal mine roadway filling system according to claim 3, characterized in that, The measuring rod has a plug hole at its top end; one side of the mounting plate has a protrusion that matches the plug hole; the protrusion is inserted into the plug hole.

5. The coal mine roadway filling system according to any one of claims 1 to 4, characterized in that, The resistor array includes multiple measuring resistors connected in series. Each magnetic induction switch corresponds to a measuring resistor. The end of each resistor furthest from the first electrode is electrically connected to the second electrode through the corresponding magnetic induction switch.

6. The coal mine roadway filling system according to any one of claims 1 to 4, characterized in that, The filling height measuring device also includes a conversion display, which is electrically connected to the resistance detector and is used to convert the resistance value detected by the resistance detector into the actual height value and display it.

7. A filling method for a coal mine roadway filling system according to any one of claims 1 to 6, characterized in that, include: Different backfill materials are premixed and then the mixed backfill material is filled into the roadway; During the filling process, the cumulative height of the filling material in the roadway, the feeding rate of different filling materials and the discharge rate of the mixed filling material are monitored, and the time of the filling material reaching the roof is calculated. Based on the cumulative height of the backfill material in the roadway and the calculated time for the backfill material to reach the roof, adjust the mix ratio of different backfill materials and the filling rate in the roadway.

Images