A goaf rapid filling system based on high-water material and a bearing reinforcement method

Abstract

The application discloses a kind of based on high water material's goaf rapid filling system and bearing reinforcement method, in working face every advance a distance then along the width direction of working face layout a row of filling body, and when layout, adopt interval layout mode, first sequentially pass odd-numbered filling bag through vertical mould, bearing reinforcement and grouting filling process, make the high water material in odd-numbered filling bag solidification form filling body, at this time to working face goaf realizes certain support intensity, while even-numbered filling bag has not formed filling body, need not wait even-numbered formation filling body, make working face continue to advance, like this effectively improve the advancing efficiency of working face, in addition since odd-numbered filling bag in grouting filling, even-numbered filling bag has started vertical mould, bearing reinforcement process, like this can improve the advancing speed of working face, while can improve the bearing strength of solidification filling body, effectively guarantee the support effect of filling body to goaf.

Description

TECHNICAL FIELD

[0001] The application relates to a goaf rapid filling system based on high-water material and a bearing strengthening method, and belongs to the technical field of mine filling support. BACKGROUND

[0002] At present, in the process of coal mining, filling mining can reduce the surface subsidence above the coal mining area and reduce the damage to the ground buildings or structures, so as to realize the green and efficient mining of coal resources.

[0003] Gangue, paste and high-water material are common filling materials in goaf. The gangue filling has the problems of insufficient gangue storage in the mine, easy reduction of the control effect on the surface subsidence due to the large gap between the gangues after filling, and the paste filling has the problems of large transportation resistance and easy blockage of the transportation pipeline due to the large material consistency. Compared with the above, the high-water material filling is a filling method in which A material and B material and water are separately prepared into slurry according to the proportion, then are transported respectively and are mixed in the filling bag. The A material and B material slurry has the advantages of small transportation resistance and long time non-solidification when being transported separately, and the two materials have the advantages of fast solidification after being mixed and high strength after final solidification. However, the process from the liquid solidification of the high-water material to the final solidification of the high-water material needs a certain time, and the filling body close to the goaf or located in the local special geological condition has a large load, and the filling body is prone to compression fracture during the support process. Therefore, how to provide a system and a method capable of accelerating the filling speed of the high-water material into the filling bag in a short time, improving the bearing strength of the filling body after solidification, effectively ensuring the support effect of the filling body on the goaf and improving the advancing speed of the working face, so as to promote the wide application of the high-water material filling mining, is one of the research directions in the industry. SUMMARY

[0004] In view of the problems in the prior art, the application provides a goaf rapid filling system based on high-water material and a bearing strengthening method, which can accelerate the filling speed of the high-water material into the filling bag in a short time, improve the bearing strength of the filling body after solidification, effectively ensure the support effect of the filling body on the goaf and improve the advancing speed of the working face, so as to promote the wide application of the high-water material filling mining.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows: a goaf rapid filling system based on high-water material, comprising a plurality of stirring and containing devices, a horizontal stirring tank, a plurality of double-channel conveying pumps, a mixing conveying pump and a filling bag.

[0006] Every two stirring and containing devices in the plurality of stirring and containing devices are a group, and the two stirring and containing devices in each group are respectively used for containing and stirring A material slurry and B material slurry.

[0007] The discharge outlets of the two stirring and containing devices in the stirring and containing device group farthest from the filling bag are respectively connected to the two channel inlets of one double-channel conveying pump through pipelines, the two channel outlets of the double-channel conveying pump are respectively connected to the two stirring and containing devices in the other stirring and containing device group through pipelines, the discharge outlets of the two stirring and containing devices in the other stirring and containing device group are respectively connected to the two channel inlets of another double-channel conveying pump, and the above-mentioned alternating connection is continued until the two channel outlets of the double-channel conveying pump are connected to the feeding inlets of the horizontal stirring tank, the A slurry and the B slurry are mixed in the horizontal stirring tank after passing through the multiple stirring and containing device groups and the multiple double-channel conveying pumps to form high-water material, and finally the discharge outlet of the horizontal stirring tank is connected to the two channel inlets of the mixing conveying pump, and the two channel outlets of the mixing conveying pump are respectively connected to the two grouting inlets of the filling bag through pipelines, so that the mixed high-water material is injected into the filling bag from the grouting inlets, and the high-water material is solidified in the filling bag to form a filling body.

[0008] A plurality of anchor sleeves are arranged on the filling bag, and the anchor sleeves are used for enabling the anchor rod to pass through the filling bag from the anchor sleeves, so as to enhance the supporting strength after the filling body is formed.

[0009] Further, a plurality of nylon bag ears are arranged on the filling bag, and the plurality of nylon bag ears are respectively hung on the plurality of single hydraulic support columns, so that the filling bag can be unfolded when the single hydraulic support column is lifted, thereby facilitating the subsequent injection of the high-water material.

[0010] Further, an inflation inlet is arranged on the filling bag, and the inflation inlet is used for inflating the filling bag to increase the internal volume, thereby facilitating the subsequent injection of the high-water material.

[0011] Further, the stirring and containing device is a rapid stirring barrel or a large-capacity stirring barrel. The rapid stirring barrel or the large-capacity stirring barrel is an existing device, and the rapid stirring barrel has the advantage of high stirring speed, and can be used for rapid stirring when the A and B materials are initially transported. The large-capacity stirring barrel can accommodate more slurry, thereby facilitating the subsequent transportation.

[0012] The above-mentioned bearing strengthening method based on the high-water material gob rapid filling system has the following specific steps:

[0013] A, first, the distance between the filling section and the shaft is determined. If the distance from the roadway entrance of the filling working face to the shaft is less than 3Km, the multiple stirring and containing devices and the multiple double-channel conveying pumps in the rapid filling system are placed on the ground near the shaft. If not, the multiple stirring and containing devices and the multiple double-channel conveying pumps in the rapid filling system are placed in the connecting roadway or chamber outside the section. The horizontal stirring tank and the mixing conveying pump in the rapid filling system are placed on the equipment train in the transportation roadway of the working face, and can move with the train.

[0014] B, according to the position of each device of the rapid filling system determined in step A, the rapid filling system is assembled, if the plurality of stirring containers and the plurality of double-channel conveying pumps are on the ground, the devices on the ground are connected and then extended into the wellbore through high-pressure rubber pipes to be connected with the horizontal stirring tank and the mixing conveying pump under the well; if the plurality of stirring containers and the plurality of double-channel conveying pumps are in the communication lane or chamber, the devices in the communication lane or chamber are connected and then extended into the wellbore through high-pressure rubber pipes to be connected with the horizontal stirring tank and the mixing conveying pump under the well; wherein the two stirring containers in the stirring container group farthest from the filling bag are both rapid stirring barrels, which are respectively used for rapid stirring after the injection of A slurry and B slurry, and subsequent conveying, and the rest of the stirring containers are all large-capacity stirring barrels;

[0015] C, during the working face advancing process, a row of filling body layout positions are determined along the working face width direction every time a distance is advanced, and each filling body position is sequentially numbered from one end, the filling bags are placed on the filling body positions numbered with odd numbers respectively, the nylon bag ears on the filling bags are hung on the respective corresponding single hydraulic props respectively, the single hydraulic props are raised until they are connected to the roof, the filling bags are completely unfolded, and the formwork process of each filling bag is completed;

[0016] D, each filling bag whose formwork process is completed is respectively provided with a plurality of counter-pulling anchor sleeves through the respective counter-pulling anchor sleeves, the counter-pulling anchor sleeves are sequentially threaded from the top row of the filling bag downward, the counter-pulling anchor sleeves are threaded, the counter-pulling anchor sleeve holes are tightened with a strap, the counter-pulling anchor sleeves are threaded to limit the compression expansion of the filling body side and improve the bearing strength of the filling body, and the bearing strengthening process is completed;

[0017] E, two grouting ports of each filling bag whose bearing strengthening process is completed are respectively connected with the two channel outlets of the mixing conveying pump through pipelines, then the rapid filling system is started to inject high-water material into the filling bag according to the set parameters, until the high-water material in the filling bag is connected to the roof, the grouting of the filling bag is stopped, the grouting port is tightened with a strap, the filling of the filling bag is completed, then another filling bag is selected and the grouting process of the filling bag in this step is repeated, and so on until the grouting process of each filling bag is completed;

[0018] F, when the filling bags numbered with odd numbers start grouting and filling, the filling bags are respectively placed on the filling body positions numbered with even numbers at the same time, and the processes of steps C to E are repeated to sequentially complete the formwork, bearing strengthening and grouting and filling processes of the filling bags numbered with even numbers, and after the high-water material is solidified in the filling bag to form a filling body, the filling and supporting process of a row of filling bodies is completed, and during the subsequent working face advancing process, each row of filling bodies repeats steps C to F to realize the rapid filling and supporting of the filling bodies.

[0019] Further, the standard for setting the parameters of the rapid filling system in step E is:

[0020] Let the maximum slurry production of the rapid stirring barrel in one time be V1, the production time in one time be 2 minutes, the maximum capacity of the large capacity stirring barrel be V2, the maximum delivery capacity of the double channel delivery pump and the mixing delivery pump per minute be V3, the inner diameter of the pipeline between the mixing delivery pump and the horizontal stirring tank be d1, the maximum compressive strength be p1; the diameter of the pipeline between the mixing delivery pump and the filling bag be d2, the maximum compressive strength be p2; the volume of the filling bag be V4, the time for setting up a filling bag be t, then the above relationship is as follows:

[0021]

[0022] In the formula, p is the water density, kg / m 3 g is the gravity stress, N / kg;

[0023] According to the above relationship, when one filling bag is filled, the next filling bag is set up and the bearing strengthening process is completed, the rapid stirring barrel continues to produce the slurry, and the produced slurry is delivered to the large capacity stirring barrel until the slurry in the large capacity stirring barrel exceeds , the work of the rapid stirring barrel is stopped, at this time the large capacity stirring barrel continues to stir to prevent the slurry from segregating.

[0024] Further, the diameter of the anchor rod in step D is φ22mm, and the interval distance of the anchor rod sleeve on each filling bag is 1m, which can meet the support strength required by the bearing strengthening.

[0025] Compared with the prior art, the distance between the filling section and the wellbore is determined first, the placement positions of various devices in the rapid filling system are determined according to the distance condition, and the connection is assembled, so that the subsequent conveying of A material and B material is facilitated; then one row of filling bodies is arranged along the width direction of the working face every time the working face advances by a distance, and the interval arrangement mode is adopted during the arrangement, the odd-numbered filling bags are sequentially subjected to the processes of formwork erection, load enhancement and grouting filling, the high-water material in the odd-numbered filling bags is solidified to form the filling bodies, at this time, a certain support strength is achieved for the goaf of the working face, and at the same time, the even-numbered filling bags do not form the filling bodies, so that the working face can continue to advance, thereby effectively improving the advancing efficiency of the working face, in addition, since the odd-numbered filling bags are subjected to the grouting filling at the same time, the even-numbered filling bags have started the processes of formwork erection and load enhancement, so that the overall filling bag arrangement efficiency can also be improved; in order to improve the grouting filling process of the filling bag, the formwork erection process is set, since the initial state of the filling bag is the folded and compressed mode, the filling bag is hung on the single hydraulic prop and rises with the single hydraulic prop during the formwork erection process, so that the filling bag is completely unfolded, then air is injected into the filling bag through the air inlet to expand the internal space, the formwork erection process is completed, and then the grouting filling is performed through the set parameters, that is, the combination of the unfolding, expansion and parameter setting grouting filling of the filling bag can effectively accelerate the speed of the slurry into the filling bag, and finally improve the speed of forming the filling body; in order to ensure that the support strength of the subsequent working face advancing can be started after the interval arrangement of the above row of filling bodies (that is, after the odd-numbered filling bodies are formed), the load enhancement process of the counter-pulling anchor rod is performed before the filling bag is filled, after the load enhancement, the part of the filling bodies in the row can be supported, so that the working face can be subsequently advanced, and the remaining part of the filling bodies can be supported during the advancing of the working face, so that the filling speed of the high-water material into the filling bag can be accelerated in a short time, the advancing speed of the working face is improved, the load bearing strength of the solidified filling body is improved, the support effect of the filling body on the goaf is effectively ensured, and the wide application of the high-water material filling mining is promoted. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the connection schematic diagram of two rapid mixing barrels and a 1# large power conveying pump of the rapid filling system in the embodiment of the application;

[0027] Figure 2 is the connection schematic diagram of a 1# large power conveying pump, two large capacity mixing barrels and a 2# large power conveying pump of the rapid filling system in the embodiment of the application;

[0028] Figure 3is the connection diagram of the horizontal stirring barrel, the 3# high-power conveying pump and the filling bag of the rapid filling system in the embodiment of the present application;

[0029] Figure 4 is the structural diagram of the filling bag in the embodiment of the present application;

[0030] Figure 5 is the layout diagram of each row of filling bodies in the embodiment of the present application. DETAILED DESCRIPTION

[0031] The present application will be further described below.

[0032] Embodiment: A goaf rapid filling system based on high-water material, comprising a plurality of stirring and containing devices, a horizontal stirring tank, two double-channel conveying pumps, a mixing conveying pump and a filling bag;

[0033] Each two stirring and containing devices in the plurality of stirring and containing devices form a group, and there are two groups, and the two stirring and containing devices in each group are respectively used for containing and stirring A slurry and B slurry; one group of stirring and containing devices is two rapid stirring barrels, and the other group is two large-capacity stirring barrels. The rapid stirring barrel or the large-capacity stirring barrel is an existing device and has different functions; the rapid stirring barrel has the advantage of fast stirring speed and can rapidly stir A and B materials at the beginning of transmission; the large-capacity stirring barrel can accommodate more slurry and is convenient for transportation use. The two double-channel conveying pumps are respectively numbered as a 1# high-power conveying pump and a 2# high-power conveying pump, and the mixing conveying pump is numbered as a 3# high-power conveying pump.

[0034] As shown in Figures 1 to 3 , the discharge outlets of the two rapid stirring barrels are respectively connected with the two-channel inlets of the 1# high-power conveying pump through pipelines, the two-channel outlets of the 1# high-power conveying pump are respectively connected with the feeding inlets of the two large-capacity stirring barrels through pipelines, the discharge outlets of the two large-capacity stirring barrels are respectively connected with the two-channel inlets of the 2# high-power conveying pump, the two-channel outlets of the 2# high-power conveying pump are connected with the feeding inlet of the horizontal stirring tank, A slurry and B slurry are mixed to form high-water material in the horizontal stirring tank after passing through the two rapid stirring barrels, the two large-capacity stirring barrels and the two double-channel conveying pumps, and finally the discharge outlet of the horizontal stirring tank is connected with the two-channel inlets of the 3# high-power conveying pump, and the two-channel outlets of the 3# high-power conveying pump are respectively connected with the two grouting inlets of the filling bag through pipelines, so that the mixed high-water material is injected into the filling bag from the grouting inlets, and the high-water material forms a filling body after solidification in the filling bag;

[0035] As shown in Figure 4As shown, the filling bag is provided with a plurality of anchor sleeve for pulling anchor rod from the anchor sleeve through the filling bag, enhancing the support strength after the formation of the filling body; the filling bag is provided with a plurality of nylon bag ears, and the plurality of nylon bag ears are hung on the plurality of single hydraulic props, when the single hydraulic prop is raised, the filling bag can be unfolded, thereby facilitating the subsequent injection of high water material; the filling bag is provided with an inflation port, and the inflation port is used to inject gas into the filling bag to expand and increase the internal volume, thereby facilitating the subsequent injection of high water material.

[0036] The above-mentioned stirring container, horizontal stirring tank, multiple double-channel conveying pumps, mixing conveying pump and filling bag are all existing equipment, which can be obtained by market purchase.

[0037] The above-mentioned bearing strengthening method of the goaf rapid filling system based on high water material has the following specific steps:

[0038] A, first determine the distance between the filling section and the shaft, if the distance from the roadway entrance of the filling working face to the shaft is less than 3Km, then place the two rapid stirring barrels, two large capacity stirring barrels and two double-channel conveying pumps in the rapid filling system on the ground near the shaft, if not, then place the two rapid stirring barrels, two large capacity stirring barrels and two double-channel conveying pumps in the rapid filling system in the communication roadway or chamber outside the section; the horizontal stirring tank and the mixing conveying pump in the rapid filling system are placed on the equipment train of the working face transportation roadway, and can move with the train; the two double-channel conveying pumps are numbered as 1# high-power conveying pump and 2# high-power conveying pump respectively, and the mixing conveying pump is numbered as 3# high-power conveying pump, and spare rapid stirring barrels, large capacity stirring barrels, double-channel conveying pumps, horizontal stirring tanks and mixing conveying pumps are arranged near the rapid filling system, which can be replaced in time when specific equipment fails;

[0039] B, according to the position of each equipment of the rapid filling system determined in step A, assemble the rapid filling system, if the two rapid stirring barrels, two large capacity stirring barrels and two double-channel conveying pumps are on the ground, then connect the equipment on the ground, and then extend the high-pressure rubber pipe into the shaft to connect with the horizontal stirring tank and the mixing conveying pump underground; if the two rapid stirring barrels, two large capacity stirring barrels and two double-channel conveying pumps are in the communication roadway or chamber, then connect the equipment in the communication roadway or chamber, and then extend the high-pressure rubber pipe into the shaft to connect with the horizontal stirring tank and the mixing conveying pump underground; the stirring container group farthest from the filling bag is two rapid stirring barrels, which are used for rapid stirring after the injection of A slurry and B slurry, and subsequent conveying;

[0040] C, during the working face advancing process, every time a distance is advanced, such as Figure 5As shown, the layout position of a row of filling bodies is determined in advance along the working face width direction, and each filling body position is sequentially numbered from one end. The filling bags are placed on the filling body positions numbered odd, and the nylon bag ears on the filling bags are hung on the corresponding single hydraulic props, respectively. The single hydraulic props are raised until they reach the roof, driving the filling bags to fully expand. Then, air is injected into the filling bags through the air inlet to make the filling bags swell and increase the internal space. After complete swelling, air injection is stopped and the air inlet is kept open. At this time, the excess gas inside the filling bag is discharged, and the process of erecting the mold of each filling bag is completed.

[0041] D. Each filling bag with the completed mold erection process is threaded through the sleeve of the corresponding counter-pulling anchor rod, and the diameter of the counter-pulling anchor rod is φ22mm. The interval distance of the counter-pulling anchor rod sleeve on each filling bag is 1m. The threading sequence of the counter-pulling anchor rod is from the top row of the filling bag to the bottom row. After threading the counter-pulling anchor rod, the sleeve hole of the counter-pulling anchor rod is tightened with a ribbon. The counter-pulling anchor rod is threaded to limit the lateral pressure expansion of the filling body and improve the bearing strength of the filling body. The bearing reinforcement process is completed. In addition, the counter-pulling anchor rod is 8cm longer than the width of the filling bag, with 4cm exposed on each side of the filling bag. For the first row of filling bags arranged in the working face, a flat tray is placed on each side of the exposed part of the counter-pulling anchor rod. The tray on the side close to the goaf is tightened with a nut, and the tray on the side close to the working face is fixed with a connecting steel pipe. The connecting steel pipe is 8cm long and has an inner diameter of 22mm. The inner surface is fully threaded and matched with the thread on the counter-pulling anchor rod. When threading the counter-pulling anchor rod after erecting the mold in the next row, the exposed part of the counter-pulling anchor rod on the side of the filling body is screwed into the connecting steel pipe. A flat tray is placed on the exposed part of the counter-pulling anchor rod close to the working face, and then screwed into the connecting steel pipe. Each row is repeated in turn, which can make each row of filling bodies support each other, thereby improving the support effect on the working face.

[0042] E. Two grouting ports of each filling bag with completed bearing reinforcement are connected to the outlets of two channels of the mixed delivery pump through pipelines, and then the rapid filling system is started to inject high-water material into the filling bag according to the set parameters. When the high-water material in the filling bag reaches the roof, the grouting of the filling bag is stopped, and the grouting port is tightened with a ribbon. The filling of the filling bag is completed, and then another filling bag is selected and the grouting process of the filling bag in this step is repeated. This process is repeated until the grouting process of each filling bag is completed. The standard of the specific set parameters of the rapid filling system is:

[0043] The maximum slurry production of the fast stirring barrel is V1, the production time is 2 minutes, the maximum capacity of the large capacity stirring barrel is V2, the maximum delivery capacity of the double channel delivery pump and the mixing delivery pump is V3, the inner diameter of the pipeline between the mixing delivery pump and the horizontal stirring tank is d1, the maximum compressive strength is p1; the diameter of the pipeline between the mixing delivery pump and the filling bag is d2, the maximum compressive strength is p2; the volume of the filling bag is V4, the time for setting up a filling bag is t, and the above relationship is as follows:

[0044]

[0045] In the formula, ρ is the water density, kg / m 3 g is the gravity stress, N / kg;

[0046] According to the above relationship, when a filling bag is filled, the next filling bag is set up and the bearing strengthening process is completed, the fast stirring barrel continues to produce materials, and the prepared materials are delivered to the large capacity stirring barrel until the slurry in the large capacity stirring barrel exceeds , the fast stirring barrel stops working, and the large capacity stirring barrel continues to stir to prevent the slurry from segregating.

[0047] F, when the filling bag numbered with an odd number starts to fill and fill, the filling bag numbered with an even number is placed at the position of the filling body respectively, and the process of steps C to E is repeated, and the setting up, bearing strengthening and filling process of each even numbered filling bag is completed in turn, and when the high water material in the filling bag numbered with an odd number is solidified to form a filling body, the working face starts to advance, and there is no need to wait for the even numbered filling bag to be solidified to form a filling body, and in the process of advancing the working face, the high water material in the even numbered filling bag is solidified to form a filling body, thereby completing the filling and supporting process of a row of filling bodies, and in the subsequent working face advancing process, steps C to F are repeated for each row of filling bodies, so that the filling and supporting process of the filling body is realized.

[0048] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A rapid filling system for goaf areas based on high-water-content materials, characterized in that, It includes multiple mixing and holding devices, a horizontal mixing tank, multiple dual-channel transfer pumps, a mixing transfer pump, and filling bags; In a multi-stage mixing and holding device, every two mixing and holding devices form a group, and the two mixing and holding devices in each group are used for holding and mixing slurry A and slurry B respectively. In the mixing and holding device group furthest from the filling bag, the outlets of the two mixing and holding devices are respectively connected to the two inlets of one of the dual-channel conveying pumps via pipelines. The two outlets of the dual-channel conveying pump are respectively connected to the inlets of two mixing and holding devices in another mixing and holding device group via pipelines. The outlets of the two mixing and holding devices in the other mixing and holding device group are respectively connected to the two inlets of the next dual-channel conveying pump. This alternating connection continues until the two outlets of the dual-channel conveying pumps are both connected to the inlet of the horizontal mixing tank. After passing through multiple mixing and holding devices and multiple dual-channel conveying pumps, the A slurry and B slurry are mixed in the horizontal mixing tank to form a high-water material. Finally, the outlet of the horizontal mixing tank is connected to the two inlets of the mixing conveying pump. The two outlets of the mixing conveying pump are respectively connected to the two injection ports of the filling bag via pipelines, so that the high-water material formed by the mixture is injected into the filling bag from the injection ports. After the high-water material solidifies in the filling bag, it forms the filling body. The filling bag is equipped with multiple tie rod sleeves, which are used to allow the tie rods to pass through the filling bag, thereby enhancing the support strength after the filling body is formed.

2. The rapid filling system for goaf based on high-water-content materials according to claim 1, characterized in that, The filling bag is equipped with multiple nylon loops, which are respectively hung on multiple individual hydraulic supports. When the individual hydraulic supports are raised, they can cause the filling bag to unfold, thereby facilitating the subsequent injection of high-water materials.

3. The rapid filling system for goaf based on high-water-content materials according to claim 1, characterized in that, The filling bag is equipped with an air inlet. Air is injected into the filling bag through the air inlet to expand it and increase its internal volume, which facilitates the subsequent injection of high-moisture materials.

4. The rapid filling system for goaf based on high-water-content materials according to claim 1, characterized in that, The mixing and holding device is a rapid mixing tank or a large-capacity mixing tank.

5. A method for strengthening the load-bearing capacity of a rapid filling system for goaf based on high-water-content materials according to claim 1, characterized in that, The specific steps are as follows: A. First, determine the distance between the filling section and the shaft. If the distance from the roadway entrance to the shaft opening of the filling working face is less than 3 km, place multiple mixing and holding devices and multiple dual-channel conveying pumps in the rapid filling system on the ground near the shaft. Otherwise, place multiple mixing and holding devices and multiple dual-channel conveying pumps in the rapid filling system in the connecting roadway or chamber outside the section. The horizontal mixing tank and mixing and conveying pump in the rapid filling system are all placed on the equipment train in the working face transportation roadway and can move with the train. B. Assemble the rapid filling system according to the positions of each piece of equipment determined in step A. If multiple mixing and holding devices and multiple dual-channel conveying pumps are located on the ground, the equipment on the ground is connected and then connected to the horizontal mixing tank and mixing conveying pump in the well shaft via high-pressure hoses. If multiple mixing and holding devices and multiple dual-channel conveying pumps are located in the connecting roadway or chamber, the equipment in the connecting roadway or chamber is connected and then connected to the horizontal mixing tank and mixing conveying pump in the well shaft via high-pressure hoses. Among them, the two mixing and holding devices in the mixing and holding device group farthest from the filling bag are both rapid mixing tanks, which are used for rapid mixing of A slurry and B slurry after injection and for subsequent conveying. All other mixing and holding devices are large-capacity mixing tanks. C. During the advancement of the working face, after each advancement a certain distance, the placement position of a row of filling bodies is predetermined along the width direction of the working face. The positions of each filling body are sequentially numbered from one end. Filling bags are placed at the odd-numbered filling body positions, and the nylon bag ears on the filling bags are hung on their respective individual hydraulic supports. Each individual hydraulic support is raised until it reaches the top, which drives the filling bags to fully unfold, completing the formwork erection process of each filling bag. D. After the formwork is completed, multiple tie rods are inserted into each filling bag through its own tie rod sleeve. The tie rods are inserted in the order of starting from the top row of the filling bag and going down. After the tie rods are inserted, the tie rod hole sleeve is tied tightly with a cable tie. By inserting tie rods, the expansion of the filling body under pressure on the side is restricted and the bearing strength of the filling body is improved, thus completing the bearing strengthening process. E. After completing the load-bearing reinforcement of each filling bag, connect the two grouting ports of one filling bag to the two channel outlets of the mixing and conveying pump through pipelines. Then start the rapid filling system and inject high-water material into the filling bag according to the set parameters until the high-water material in the filling bag reaches the top. Stop the grouting of the filling bag and tie the grouting port with a cable tie. The filling of the filling bag is completed. Then select another filling bag and repeat the filling bag grouting process in this step. Repeat this process until the grouting process of each filling bag is completed. F. When grouting begins on the odd-numbered filling bags, simultaneously place filling bags at the even-numbered filling body positions, and repeat steps C to E to complete the formwork erection, load-bearing reinforcement, and grouting process for each even-numbered filling bag in sequence. After the high-water material solidifies inside the filling bag, a filling body is formed, thus completing the filling and support process for one row of filling bodies. During the subsequent working face advancement, steps C to F are repeated for each row of filling bodies to achieve rapid filling and reinforced support.

6. A method for strengthening the load-bearing capacity of a rapid filling system for goaf based on high-water-content materials according to claim 5, characterized in that, The standard for setting the specific parameters of the rapid filling system in step E is as follows: Let V1 be the maximum pulping capacity of the rapid mixing tank in one cycle, and 2 minutes be the production time in one cycle. Let V2 be the maximum capacity of the large-capacity mixing tank, and V3 be the maximum conveying capacity per minute of both the dual-channel conveying pump and the mixing pump. Let d1 be the inner diameter of the pipeline between the mixing pump and the horizontal mixing tank, and p1 be the maximum compressive strength. Let d2 be the diameter of the pipeline between the mixing pump and the filling bag, and p2 be the maximum compressive strength. Let V4 be the volume of the filling bag, and t be the time required to erect one filling bag. Then the above relationships are as follows: In the formula, ρ is the density of water, kg / m³ 3 g is the self-weight stress, N / kg; Based on the parameters set according to the above relationship, when one filling bag is completed and the next filling bag has completed the mold erection and load-bearing reinforcement process, the rapid mixing tank continues to produce material. The produced material is then transported to the large-capacity mixing tank until the slurry in the large-capacity mixing tank exceeds the specified limit. When the high-speed mixing tank stops working, the large-capacity mixing tank continues mixing to prevent slurry segregation.

7. A method for strengthening the load-bearing capacity of a rapid filling system for goaf based on high-water-content materials according to claim 5, characterized in that, In step D, the diameter of the tie rod is φ22mm, and the spacing between the tie rod sleeves on each filling bag is 1m.

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