A gob abandoned inclined shaft roadway mold bag grouting plugging device and construction method

Abstract

The application discloses a gob abandoned inclined shaft roadway mould bag grouting plugging device and a construction method, which comprises a grouting pipe, a mould bag body and a protective bag, the mould bag body is sleeved outside the grouting pipe, the outer wall of the mould bag body is woven with a protective net, a plurality of stress surfaces are arranged on the inner side of the outer wall of the mould bag body, the protective bag is sleeved outside the mould bag body, a rubber strip is attached to the outer wall of the protective bag, and a wear-resistant coating is arranged on the outer side of the rubber strip of the protective bag. Compared with the prior art, the application has the advantages that the mould bag can be protected without increasing the folding volume of the mould bag, the mould bag is prevented from being torn, and after the super-high-water material A and the super-high-water material B are mixed and stirred, the mixture is injected into the mould bag, the flowability of the mixture is quickly lost, and the strength is formed, so that the grouting plugging success rate of the mould bag is improved, the continuity of the mould bag grouting super-high-water material construction is ensured, a large amount of grouting material is saved, the plugging effect is improved, and the engineering cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of inclined shaft roadway sealing technology, specifically to a grouting sealing device and construction method for abandoned inclined shaft roadways in goaf areas. Background Technology

[0002] In goaf grouting remediation projects, due to the constraints of the remediation scope, abandoned inclined shafts connecting the remediation area and the outside must be sealed. These abandoned inclined shafts are typically inaccessible to personnel. To address this issue, the geotextile bag grouting method is a good solution. Application publication number CN114658480, entitled "Geotextile Bag Grouting Device and Method for Sealing Inclined Shafts in Goaf Roadways," discloses a geotextile bag grouting device and method for sealing inclined shafts in goaf roadways. The device includes a geotextile bag, a grouting pipe, and protective components. This publication details the principle of the geotextile bag grouting method for sealing inclined shafts in goaf roadways. The geotextile bag method involves drilling holes on the surface and lowering a pre-fabricated geotextile bag and grouting pipe structure into the inclined shaft roadway. Grouting completely fills the geotextile bag to form a sealing structure.

[0003] However, the structure of the protective bag device proposed in this invention is relatively complex. It requires dissolving the water-soluble line with clean water to disassemble the protective components, which is cumbersome. Furthermore, the protective components are limited by the diameter of the surface borehole, making installation difficult and increasing construction complexity. Moreover, during grouting, the protective bag is prone to rupture under the influence of sharp objects on the floor and walls of the inclined shaft, easily leading to grout loss. This results in grout within the treatment area flowing through the inclined shaft and roadway to deep goaf areas that do not require treatment or goaf areas outside the grouting range, severely affecting the grouting treatment effect, causing significant grout leakage, and increasing material costs. Therefore, those skilled in the art provide a protective bag grouting and sealing device and construction method for abandoned inclined shafts in goaf areas to solve the problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this invention is to provide a grouting and sealing device and construction method for abandoned inclined shaft roadways in goaf areas, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A grouting and sealing device for abandoned inclined shafts in goaf areas includes: a grouting pipe, a grouting bag body, and a protective bag. The grouting bag body is fitted over the grouting pipe, and the outer wall of the grouting bag body is woven with a protective net. The outer wall of the grouting bag body has several stress-bearing surfaces located inside the protective net. The protective bag is fitted over the grouting bag body, and the outer wall of the protective bag is bonded with adhesive strips. The outer wall of the protective bag is provided with a wear-resistant coating located outside the adhesive strips.

[0007] Preferably, a tear is provided on the outer wall of the protective bag at the position corresponding to the adhesive strip.

[0008] Preferably, the body of the molded bag is woven from nylon thread, and the specification of the body of the molded bag is 150 mesh to 600 mesh.

[0009] Preferably, the protective net is woven from textile threads on the surface of the molded bag body, and the stress-bearing surface is the surface of the molded bag body located within the mesh of the protective net.

[0010] Preferably, a construction method for a geotextile bag grouting sealing device for abandoned inclined shafts in goaf areas specifically includes the following steps:

[0011] Step 1: Conduct a mixing ratio test of ultra-high water content grouting material indoors to determine the mixing time of ultra-high water content material and the time when the grout loses its fluidity;

[0012] Step 2: Determine the slurry preparation equipment and the slurry mixing pump based on the grouting depth and the volume of the mold bag;

[0013] Step 3: Conduct surface slurry preparation and mold bag grouting tests using slurry preparation equipment and mixed slurry injection pumps to obtain the mixing volume, mixing time, and mold bag grouting rate of the slurry preparation equipment, and verify the quality of the slurry after solidification.

[0014] Step 4: Based on the mixing volume, mixing time and grouting rate of the pulping equipment obtained in Step 3, guide and control the grouting operation of the mold bag, and determine the number of pulping equipment and grouting pumps for the mixed slurry.

[0015] Step 5: After connecting the grouting pipe to the grouting ports of multiple mixed grouting pumps, put the folded formwork bag body on the outside of the grouting pipe, and put the protective bag on the outside of the formwork bag body. Tear off the adhesive strip to expose the tear opening, and complete the installation of the formwork bag.

[0016] Step 6: Extend the grouting pipe, the formwork bag body, and the protective bag from the borehole into the inclined shaft tunnel. Turn on the slurry preparation equipment to mix the ultra-high water material and water to obtain slurry. At the same time, the mixing equipment stops working, and multiple mixed slurry injection pumps sequentially extract the sealing slurry from the corresponding mixing equipment and fill the sealing slurry into the formwork bag body from the grouting pipe.

[0017] Step 7: Based on the grouting pressure in Step 6, the protective bag body is torn open from the tear opening to continue to contain the grout;

[0018] Step 8: After the grout has filled the mold bag body, remove the grouting pipe and wait for the grout to solidify to complete the grouting and sealing work of the inclined shaft tunnel.

[0019] Preferably, the pulping method of the pulping equipment in step six specifically includes the following steps:

[0020] a. By proportioning, ultra-high water content material A and ultra-high water content material B are respectively added into a single slurry mixer and mixed with water to obtain slurry A and slurry B.

[0021] b. Using a grouting pump, grout A and grout B are respectively transported into a mixing grout mixer for mixing and stirring to obtain a sealing grout.

[0022] Preferably, the mixing time of ultra-high water content material A and ultra-high water content material B with water in component a is not less than 3 minutes.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] By setting up a protective net, when the formwork bag is torn by friction with sharp objects on the bottom plate and wall plate of the inclined shaft, the surface of the formwork bag body can be divided into several stress surfaces. First, the stress surfaces are subjected to friction and tearing by sharp objects on the bottom plate and wall plate, and then the protective net is allowed to come into contact with the sharp objects on the bottom plate and wall plate. The protective net can protect the formwork bag from the sharp objects on the bottom plate and wall plate from continuously tearing the formwork bag, and control the tear length of the formwork bag within one stress surface, thus avoiding the situation of large-area leakage of slurry due to excessively large tear openings on the surface of the formwork bag.

[0025] By setting up a protective bag, the protective bag can be fitted over the outside of the formwork bag body. The wear-resistant coating on the surface of the protective bag comes into contact with sharp objects on the floor and walls of the inclined shaft, protecting the formwork bag body without increasing the folded volume of the formwork bag. This avoids damage caused by friction between the formwork bag and sharp objects on the floor and walls of the inclined shaft when the formwork bag is lowered into the inclined shaft. This achieves protection of the formwork bag body. Furthermore, when the formwork bag is lowered into the inclined shaft for grouting, the adhesive strip is torn off beforehand, exposing the tear on the protective bag. This allows the formwork bag body to tear from the tear when subjected to the grouting pressure. The protective bag will not interfere with the unfolding of the formwork bag. The structure is simple and reduces the construction difficulty.

[0026] The construction method of the grouting and sealing device for abandoned inclined shafts in goaf areas proposed in this invention, in order to prevent large-scale leakage of grout injected into the mold bag due to rupture of the mold bag, uses ultra-high water content materials A and B, which are mixed and stirred before being injected into the mold bag. This mixture quickly loses its fluidity and forms strength. Furthermore, the grouting and sealing construction is controlled based on pre-prepared surface grouting and injection test data. This not only improves the success rate of mold bag grouting and sealing but also ensures the continuity of ultra-high water content material injection construction. It solves the engineering problems of sealing and treating goaf areas, roadways, and inclined shafts with large internal water content and strong connectivity. It saves a large amount of grouting material, improves the sealing effect, reduces engineering costs, and brings good environmental and economic benefits. Attached Figure Description

[0027] Figure 1This is a perspective view of a grouting and sealing device for inclined shaft tunnels according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of a molded bag body according to an embodiment of the present invention;

[0029] Figure 3 This is a flowchart illustrating the construction process of grouting and sealing of inclined shaft tunnels according to an embodiment of the present invention.

[0030] Figure 4 This is a flowchart of a molding bag injection process according to an embodiment of the present invention.

[0031] In the diagram: 1. Grouting pipe; 2. Molding bag body; 21. Protective net; 22. Stress-bearing surface; 3. Protective bag; 31. Adhesive strip; 32. Wear-resistant coating; 33. Tear opening. Detailed Implementation

[0032] In the description of this invention, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the 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 of the invention. 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0033] Combination Figure 1 and Figure 2 As shown, the mold bag body 2 is fitted over the outside of the grouting pipe 1. The outer wall of the mold bag body 2 is woven with a protective net 21. The outer wall of the mold bag body 2 is provided with several stress-bearing surfaces 22 inside the protective net 21. The protective bag 3 is fitted over the outside of the mold bag body 2. The outer wall of the protective bag 3 is bonded with an adhesive strip 31. The outer wall of the protective bag 3 is provided with a wear-resistant coating 32 outside the adhesive strip 31. The outer wall of the protective bag 3 is provided with a tear 33 at the position corresponding to the adhesive strip 31. The mold bag body 2 is woven from nylon thread and the specification of the mold bag body 2 is 150 mesh to 600 mesh. The protective net 21 is woven from textile thread on the surface of the mold bag body 2. The stress-bearing surfaces 22 are the surfaces of the mold bag body 2 located within the mesh of the protective net 21.

[0034] In one embodiment, when the formwork bag body 2 is lowered from the drilled hole into the inclined shaft tunnel, the wear-resistant coating 32 on the surface of the protective bag 3 can contact sharp objects on the bottom plate and wall plate of the inclined shaft tunnel. This can protect the formwork bag body 2 without increasing the folded volume of the formwork bag, avoiding damage caused by friction between the formwork bag and sharp objects on the bottom plate and wall plate of the inclined shaft tunnel when the formwork bag is lowered into the inclined shaft tunnel. This achieves protection for the formwork bag body 2. Furthermore, by pre-tearing off the adhesive strip 31 and exposing the tear 33 on the protective bag 3, the protective bag 3 can be torn at the tear 33 when the formwork bag body 2 is unfolded under the grouting filling pressure. The protective bag 3 will not interfere with the unfolding of the formwork bag. The structure is simple and reduces the construction difficulty.

[0035] In one embodiment, when grouting the formwork bag, the protective net 21 can divide the surface of the formwork bag body 2 into several stress surfaces 22. First, the stress surfaces 22 are subjected to friction and tearing by sharp objects on the bottom plate and wall plate. Then, the protective net 21 comes into contact with the sharp objects on the bottom plate and wall plate. The protective net 21 can protect the formwork bag from continuous tearing by sharp objects on the bottom plate and wall plate, and control the tear length of the formwork bag within one stress surface 22. This avoids the situation where the grout leaks over a large area due to the large opening on the surface of the formwork bag, ensuring the grouting and sealing effect of the goaf area and saving costs.

[0036] Combination Figures 1-4 As shown, a construction method for a geotextile bag grouting sealing device for abandoned inclined shafts in goaf areas includes the following steps:

[0037] Step 1: Conduct a mixing ratio test of the ultra-high water content grouting material indoors to determine the mixing time and the time when the grout loses its fluidity. Control the grouting time according to the mixing time and the time when the grout loses its fluidity. The grout can be injected into the mold bag 1 minute before it loses its fluidity to reduce the flow time of the grout in the mold bag and avoid the trouble of grout loss due to tearing of the mold bag.

[0038] Step 2: Determine the slurry preparation equipment and the slurry mixing pump based on the grouting depth and the volume of the mold bag;

[0039] Step 3: Conduct surface slurry preparation and formwork bag grouting tests using slurry preparation equipment and mixed slurry injection pumps to obtain the mixing volume, mixing time, and formwork bag grouting rate of the slurry preparation equipment, and verify the quality of the slurry after solidification; after passing the tests, construction is carried out to ensure construction quality.

[0040] Step 4: Based on the mixing volume, mixing time, and grouting rate of the slurry preparation equipment obtained in Step 3, guide and control the grouting operation of the mold bag, and determine the number of slurry preparation equipment and mixed slurry injection pumps. Multiple slurry preparation equipment and mixed slurry injection pumps can be used to prepare and inject slurry simultaneously. After the slurry preparation equipment has finished mixing, the mixed slurry injection pump will draw it into the injection pipe 1 to inject grout into the mold bag. After the slurry in the slurry preparation equipment is extracted, the slurry preparation equipment will be mixed and prepared again to ensure the continuity of the ultra-high water content material construction for mold bag grouting.

[0041] Step 5: After connecting the grouting pipe 1 to the grouting ports of multiple mixed slurry grouting pumps, the folded formwork bag body 2 is fitted onto the outside of the grouting pipe 1, and the protective bag 3 is fitted onto the outside of the formwork bag body 2. The adhesive strip 31 is torn off to expose the tear opening 33, thus completing the installation of the formwork bag. The wear-resistant coating 32 on the surface of the protective bag 3 can contact sharp objects on the bottom plate and wall plate of the inclined shaft, which can protect the formwork bag body 2 without increasing the folded volume of the formwork bag. This avoids damage caused by friction between the formwork bag and sharp objects on the bottom plate and wall plate of the inclined shaft when the formwork bag is lowered into the inclined shaft, thus achieving protection of the formwork bag body 2.

[0042] Step Six: Extend the grouting pipe 1, the formwork bag body 2, and the protective bag 3 from the borehole into the inclined shaft tunnel. Start the grouting equipment to mix the ultra-high water content material and water to obtain grout. At the same time, the mixing equipment stops working, and multiple mixed grout injection pumps sequentially extract the sealing grout from the corresponding mixing equipment and fill the formwork bag body 2 through the grouting pipe 1. After the mixing of one grouting equipment is completed, the mixed grout injection pump extracts the grout into the grouting pipe 1 to grout the formwork bag. After the grout in the grouting equipment is extracted, the grouting equipment is mixed and prepared again to ensure the continuity of the ultra-high water content material grouting construction of the formwork bag.

[0043] Step 7: Based on the grouting pressure in Step 6, the protective bag 3 is torn open from the tear 33 by the main body 2 of the formwork bag to continue to contain the grout; the adhesive strip 31 is torn off in advance to expose the tear 33 on the protective bag 3, so that when the main body 2 of the formwork bag is opened under the grouting pressure, the protective bag 3 is torn open from the tear 33. The protective bag 3 will not interfere with the opening of the formwork bag. The structure is simple and the construction difficulty is reduced.

[0044] Step 8: After the grout has filled the mold bag body 2, remove the grouting pipe 1 and wait for the grout to solidify to complete the grouting and sealing work of the inclined shaft roadway.

[0045] In one embodiment, the pulping method of the pulping equipment in step six specifically includes the following steps:

[0046] a. By proportioning, ultra-high water content material A and ultra-high water content material B are respectively added into a single slurry mixer and mixed with water to obtain slurry A and slurry B.

[0047] b. Using a grouting pump, grout A and grout B are respectively transported into a mixing grout mixer for mixing to obtain a sealing grout.

[0048] Separately prepare grout A and grout B, and then transport them to a mixing grout mixer to mix and obtain a sealing grout. This allows for easy control of the mixing time in the mixing grout mixer, ensuring the quality of the mixed grout. Furthermore, multiple grout preparation devices and mixed grout injection pumps are used to simultaneously prepare and inject grout. After mixing is completed in one grout preparation device, the mixed grout injection pump extracts the grout into injection pipe 1 to inject grout into the formwork bag. After the grout in the grout preparation device is extracted, the device is mixed and prepared again, ensuring the continuity of the ultra-high water content material construction for formwork bag grouting.

[0049] In one embodiment, through indoor testing, it was determined that the water-to-solid ratio of the ultra-high water content material should be 2:1 to 3:1. The individual stirring time for components A and B in the ultra-high water content material should be no less than 3 minutes, with no upper limit, to achieve thorough mixing of the single slurry with water. The stirring time for the mixed slurry of components A and B should be 2 to 4 minutes, with a lower water-to-solid ratio resulting in a shorter stirring time, to achieve uniform mixing of slurries A and B. Furthermore, the slurry can be injected into the mold bag 1 minute before losing its fluidity, meaning that the mixed slurry loses its fluidity approximately 1 minute after being injected into the mold bag, and the slurry develops into a thick paste. It can initially gain strength after 3 to 15 minutes, reducing the flow time of the slurry in the mold bag and avoiding the trouble of slurry loss due to mold bag tearing, thus significantly improving the success rate of mold bag filling.

[0050] In one embodiment, the ultra-high water content material is composed of components A and B. Components A and B, when mixed as a single slurry, do not solidify for 24 hours. After mixing, the slurry of components A and B rapidly loses its fluidity and develops strength. The time for this process varies from 3 minutes to several hours, depending on the mixing ratio and environmental conditions. Meanwhile, since the mold bag volume is generally around 2*2*2m, the total volume is approximately 8m³. 3Based on field tests, the grouting rate should be between 10L / min and 50L / min. The volume of the mixer should be selected according to the grouting rate. Since the single grout of materials A and B does not set within 24 hours, the single grout mixer can supply multiple sets of mixing and grouting systems. Therefore, the volume of the single grout mixer is not limited and should meet the grouting volume of the supplied mixed grout mixer. The volume of the mixed grout mixer is controlled by the grouting rate. For ultra-high water content materials, the traditional method of mixing and grouting should not be adopted, as this method is prone to uneven mixing of materials A and B, thus affecting the setting effect of the mixed grout. The mixing time should be controlled according to the time when the mixed grout loses its fluidity as determined by the indoor grout proportioning test, and the grouting pumping time should be 1 to 3 minutes before the grout loses its fluidity.

[0051] In one embodiment, to ensure the continuity of construction, the amount of each mixing and the number of mixers are determined based on the grouting rate and mixing time. Multiple interfaces are set at the connection between the grouting port and each mixing grouting system according to the number of sets. During the grouting process, the grouting pump in the mixing tank of the mixed slurry that has reached the required mixing time works, while the grouting pumps of the remaining mixed slurries stop working. The mixing device continues to work. After the mixed slurry grouting pump in the system has finished grouting the slurry in the mixing tank, the grouting pump stops working, and A and B single slurries are mixed into the mixing tank and started to be mixed until the design mixing time is met. Then the grouting pump works again, and the cycle is repeated. Multiple sets of grouting systems work together to ensure the continuity of the construction of ultra-high water content material for geotextile bag grouting.

[0052] In one embodiment, based on indoor slurry proportioning tests, it was found that when the mixing time of materials A and B was set to 3 minutes, the slurry quickly lost its fluidity and formed strength after entering the mold bag. During the slurry mixing process, the injection rate of a single grouting pump was controlled at 50 L / min, the mixing volume of the mixing tank was about 50 L per batch, and the mixing time was 3 minutes. The discharge speed between A and B slurries and the mixed material is fast, so this time consumption is negligible. The process of each mixing and grouting equipment during construction is roughly as follows: the first mixing machine mixes for 3 minutes, the second mixing machine mixes for 2 minutes, and the third mixing machine mixes for 1 minute; at this time, the first mixing grouting pump works, and the mixing machine mixes and the grouting pump injects grout simultaneously for 1 minute. At this time, the first mixing grouting pump stops working, and A and B slurries enter the first mixing machine to start mixing; at the same time, the second mixing grouting pump works, and at this time the slurry in the third mixing machine has been mixed for 3 minutes. The second mixing grouting pump works for 1 minute, and at this time, the second mixing grouting pump stops working, and A and B slurries enter the second mixing machine to start mixing; at the same time, the third mixing grouting pump works and repeats the above process... This ensures the construction quality and continuity of the ultra-high water content material of the formwork bag.

[0053] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A construction method for a geotextile bag grouting sealing device for abandoned inclined shaft roadways in goaf areas, characterized in that, The device includes a grouting pipe (1), a molded bag body (2), and a protective bag (3). The molded bag body (2) is fitted over the outside of the grouting pipe (1), and the outer wall of the molded bag body (2) is woven with a protective net (21). The outer wall of the molded bag body (2) is provided with several stress-bearing surfaces (22) inside the protective net (21). The protective bag (3) is fitted over the outside of the molded bag body (2), and the outer wall of the protective bag (3) is bonded with an adhesive strip (31). The outer wall of the protective bag (3) is provided with a wear-resistant coating (32) outside the adhesive strip (31). A tear opening (33) is provided at the position corresponding to the adhesive strip (31) on the outer wall of the protective bag (3). The construction method specifically includes the following steps: Step 1: Conduct a mixing ratio test of ultra-high water content grouting material indoors to determine the mixing time of ultra-high water content material and the time when the grout loses its fluidity; Step 2: Determine the slurry preparation equipment and the slurry mixing pump based on the grouting depth and the volume of the mold bag; Step 3: Conduct surface slurry preparation and mold bag grouting tests using slurry preparation equipment and mixed slurry injection pumps to obtain the mixing volume, mixing time, and mold bag grouting rate of the slurry preparation equipment, and verify the quality of the slurry after solidification. Step 4: Based on the mixing volume, mixing time and grouting rate of the pulping equipment obtained in Step 3, guide and control the grouting operation of the mold bag, and determine the number of pulping equipment and grouting pumps for the mixed slurry. Step 5: After connecting the grouting pipe (1) to the grouting port of multiple mixed grouting pumps, put the folded mold bag body (2) on the outside of the grouting pipe (1) and put the protective bag (3) on the outside of the mold bag body (2), tear off the adhesive strip (31) to expose the tear opening (33), and complete the installation of the mold bag. Step 6: Extend the grouting pipe (1), the formwork bag body (2) and the protective bag (3) from the borehole into the inclined shaft roadway, turn on the slurry making equipment to stir the ultra-high water material and water to obtain slurry. At the same time, the stirring equipment stops working, and multiple mixed slurry grouting pumps sequentially extract the sealing slurry from the corresponding stirring equipment and fill the sealing slurry into the formwork bag body (2) from the grouting pipe (1). Step 7: Based on the grouting pressure in Step 6, the protective bag (3) is torn open from the tear (33) to continue to contain the grout. Step 8: After the grout has filled the mold bag body (2), remove the grouting pipe (1), wait for the grout to solidify, and complete the grouting and sealing work of the inclined shaft roadway.

2. The construction method of the formwork bag grouting and sealing device for abandoned inclined shaft roadways in goaf areas according to claim 1, characterized in that, The pulping method of the pulping equipment in step six specifically includes the following steps: Step a: According to the proportion, add ultra-high water content material A and ultra-high water content material B into a single slurry mixer and mix them with water to obtain slurry A and slurry B; Step b: Use a grouting pump to pump grout A and grout B into a mixing grout mixer for mixing to obtain a sealing grout.

3. The construction method of the formwork bag grouting and sealing device for abandoned inclined shaft roadways in goaf areas according to claim 2, characterized in that, The mixing time between ultra-high water content material A, ultra-high water content material B, and water in step a shall not be less than 3 minutes.

4. The construction method of the formwork bag grouting and sealing device for abandoned inclined shaft roadways in goaf areas according to claim 1, characterized in that, The body of the molded bag (2) is woven from nylon thread, and the specification of the body of the molded bag (2) is 150 mesh to 600 mesh. The protective net (21) is woven from textile thread on the surface of the body of the molded bag (2). The force-bearing surface (22) is the surface of the body of the molded bag (2) located within the mesh of the protective net (21).

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