Coal mine shaft waterproof and anti-seepage system based on high polymer material and construction method

Abstract

The invention relates to the technical field of mine mining, in particular to a coal mine shaft waterproof and anti-seepage system based on a high polymer material and a construction method.The coal mine shaft waterproof and anti-seepage system based on the high polymer material comprises a grouting pump, a first grouting cylinder, a second grouting cylinder, a material storage mechanism and a grouting jetting mechanism; the storage mechanism comprises a first storage barrel and a second storage barrel, the first storage barrel is communicated with the bottom of the first grouting cylinder through a first slurry suction pipe, the second storage barrel is communicated with the bottom of the second grouting cylinder through a second slurry suction pipe, four-way connectors are arranged in the middle of the first grouting cylinder and the middle of the second grouting cylinder, and the four-way connectors are communicated with the grouting jetting mechanism through slurry discharging pipes. The grouting liquid based on the high polymer material is high in compressive strength, good in anti-permeability, good in plugging and reinforcing effect, light in equipment, simple in grouting operation, short in construction preparation time, convenient and fast in hole replacement and high in construction speed, and the construction efficiency of grouting and water plugging is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mine mining, and in particular to a coal mine shaft waterproofing and anti-seepage system based on polymer materials and a construction method. Background Art

[0002] With the rapid development of mining construction technology and the large-scale development of coal resources in western my country, in the construction of coal mines, we often encounter stratum fissure water, pore water, karst water, tectonic water, etc. These stratum water sources are often abundant and the amount of water is large. If they are not handled properly, it may lead to an increase in the amount of water in the mine, and even face the risk of water and sand bursting at the mining face, causing damage to the mining face and the risk of flooding.

[0003] Grouting water blocking technology is widely used in water gushing control in tunnels, metal mines, coal mines and other projects, and the relevant research and experimental results are relatively mature. Many domestic coal mines have adopted methods such as grouting transformation of broken belts, grouting reinforcement of bottom plates, and injection of new grouting water blocking materials to control their respective water gushing conditions, achieving good results and effectively solving the water hazard threat on the working face.

[0004] However, due to the complexity of grouting media, the concealment of grouting projects, the uncertainty of hydrogeological conditions, and the influence of slurry properties, grouting technology and the variability of the grouting process on the grouting quality, the difficulty of managing coal mines in different regions has increased. Based on this, the present invention proposes a coal mine shaft waterproofing and anti-seepage system and construction method based on polymer materials, which has a wide range of application value and huge economic and social benefits. Summary of the invention

[0005] The purpose of the present invention is to provide a coal mine shaft waterproofing and anti-seepage system and construction method based on polymer materials. The polymer material-based grouting liquid used has high compressive strength, good impermeability, good sealing and reinforcement effect, light equipment, simple grouting operation, short construction preparation time, convenient hole changing, fast construction speed, and improved construction efficiency of grouting and water blocking.

[0006] To achieve the above-mentioned purpose, the present invention provides a coal mine shaft waterproofing and anti-seepage system based on polymer materials, including a grouting pump, a grouting cylinder one, a grouting cylinder two, a storage mechanism and a grouting injection mechanism. The tops of the grouting cylinder one and the grouting cylinder two are connected to the grouting pump, the storage mechanism includes a storage barrel one and a storage barrel two, the storage barrel one is connected to the bottom of the grouting cylinder one through a grouting suction pipe one, the storage barrel two is connected to the bottom of the grouting cylinder two through a grouting suction pipe two, and the middle parts of the grouting cylinder one and the grouting cylinder two are each provided with a four-way connector, and the four-way connector is connected to the grouting injection mechanism through a grouting discharge pipe.

[0007] Preferably, the grouting injection mechanism includes feed pipe 1, feed pipe 2 and a mixing pipe, one end of feed pipe 1 and feed pipe 2 are respectively connected to the slurry discharge pipe, and the other ends of feed pipe 1 and feed pipe 2 are connected to the mixing pipe through a three-way connector, and the mixing pipe is connected to the grouting head.

[0008] Preferably, a pressure gauge and a pressure relief valve are also connected to the four-way connector.

[0009] Preferably, the first storage barrel contains component A of the grouting material, and the second storage barrel contains component B of the grouting material.

[0010] Preferably, component A comprises bisphenol A epoxy resin, diphenylmethane diisocyanate, polyol and porous molecular sieve.

[0011] Preferably, the polyol includes one or more of polyoxypropylene glycol, polytetramethylene glycol, adipic acid polyester polyol, and aromatic polyester polyol.

[0012] Preferably, the porous molecular sieve includes one or more of 3A molecular sieve, XH-7 molecular sieve, XH-9 molecular sieve, and aluminum phosphate molecular sieve.

[0013] Preferably, component B includes one of dibutyltin dilaurate, triethylamine and dimethylbenzylamine.

[0014] The polymer grouting material of the present invention uses MDI type prepolymer generated by the reaction of diphenylmethane diisocyanate and polyol and porous molecular sieve to modify bisphenol A epoxy resin, thereby improving the strength and toughness of the epoxy resin and also improving the corrosion resistance of the epoxy resin. The grouting material has good impact strength, elongation at break, adhesion and corrosion resistance, and improves the water blocking rate of its solidified body.

[0015] A construction method for a coal mine shaft waterproofing and anti-seepage system based on polymer materials, comprising the following steps:

[0016] S1. Prepare grouting materials

[0017] Pour component A of the grouting material into storage barrel 1, and pour component B of the grouting material into storage barrel 2;

[0018] S2. Installation of waterproof and anti-seepage system for coal mine shaft

[0019] Install the grouting cylinder 1 and the grouting cylinder 2 at the bottom of the grouting pump, connect the material storage barrel 1 with the grouting cylinder 1 through the grouting suction pipe 1, connect the material storage barrel 2 with the grouting cylinder 2 through the grouting suction pipe 2, connect the four-way connector on the grouting cylinder 1 with the feed pipe 1 of the grouting injection mechanism through the grouting discharge pipe, connect the four-way connector on the grouting cylinder 2 with the feed pipe 2 of the grouting injection mechanism through the grouting discharge pipe, and transport the installed coal mine shaft waterproofing and anti-seepage system to the hanging tray at the construction site;

[0020] S3. Grouting hole design

[0021] Drill holes are arranged on both sides of the construction joint of the concrete pouring section of the well wall, that is, two rows of holes are arranged in each section, the upper drill hole is 250-350mm away from the construction joint, and the lower drill hole is 450-550mm away from the construction joint. The spacing between two adjacent drill holes is 2.5-3.5m, and the drill holes on the upper and lower sides are staggered; the drill holes are perpendicular to the well wall, and the drill holes are circular holes with an opening diameter of 42mm. The design depth of each drill hole is 3-5m;

[0022] S4. Grouting preparation

[0023] After drilling the hole, a water pressure test is carried out to calculate the hydrostatic pressure. Then the grouting pressure is calculated based on the hydrostatic pressure at the injection point of the wellbore, and the grouting pressure is verified by the wellbore wall strength at the same time.

[0024] S5. Grouting

[0025] Insert the grouting head of the grouting injection mechanism into the borehole and temporarily wedge it, turn on the grouting pump and the grouting injection mechanism, and inject component A and component B of the grouting material into the borehole at the same time. After the grouting of the previous grouting hole is completed, quickly transfer to the next grouting hole; the time interval of transfer should be less than 1 minute to avoid the solidification of the residual grouting material in the grouting injection mechanism, thereby affecting the construction efficiency;

[0026] S6. End grouting and clean the pipeline

[0027] After the grouting is completed, the grouting injection mechanism is pulled out and flushed with component A of the grouting material; then the connecting ends of the grouting pipe 1 and the grouting pipe 2 and the storage barrel 1 and the storage barrel 2 are disassembled, and the coal mine shaft waterproofing and anti-seepage system is cleaned with engine oil and clean water. After cleaning, the coal mine shaft waterproofing and anti-seepage system is disassembled and sorted.

[0028] Preferably, in step S4, the grouting pressure is calculated as:

[0029] P a =P0+1

[0030] P b =P0+3

[0031] P c =P0+5

[0032] Where, P0 is the hydrostatic pressure at the grouting point, MPa; P a is the initial grouting pressure, MPa; P b is the normal initial pressure, MPa; P c is the final grouting pressure, MPa;

[0033] Well wall strength verification is:

[0034]

[0035]

[0036] In the formula, P is the pressure that the wellbore can bear at the grouting location, MPa; E is the wellbore thickness; R0 is the net radius of the wellbore; K is the allowable compressive strength of the wellbore material, MPa; R is the ultimate compressive strength of the wellbore material; n is the safety factor, n=2.

[0037] Beneficial effects of the present invention:

[0038] (1) The polymer grouting material used in the present invention is a coal mine shaft waterproofing and anti-seepage system based on polymer materials, and has good impact strength, elongation at break, adhesion and corrosion resistance. After being poured into the construction joint, it can quickly penetrate into the cracks and then react to penetrate into the cracks in the coal and rock layers to produce a large penetration radius and solid volume, so that a solid with large volume, high compressive strength, good impermeability and good sealing and reinforcement effect is finally formed, which can safely and efficiently enhance the waterproof durability of the injection point of the shaft wall.

[0039] (2) The present invention is a coal mine shaft waterproofing and anti-seepage system based on polymer materials, which has a simple structure, light equipment, and is easy to deploy. It is suitable for double-liquid grouting, and the grouting operation is simple. The grouting pipes are inserted into the two groups of storage barrels respectively, and the grouting pipelines are connected. The grouting can be started by turning on the grouting pump. The construction preparation time is short, the hole change is convenient, and the construction speed is fast, which improves the construction efficiency of grouting and water blocking.

[0040] (3) The construction method of the coal mine shaft waterproofing and anti-seepage system based on polymer materials of the present invention has good treatment effect, high water blocking rate, short grouting period, and less process conversion. It has important theoretical reference value and guiding significance for the protection of shafts that may be damaged, the repair and treatment of shafts that have been damaged, and the design of coal mine shafts.

[0041] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of a coal mine shaft waterproofing and anti-seepage system based on polymer materials of the present invention.

[0043] Reference numerals:

[0044] 1. Grouting pump; 2. Grouting cylinder one; 3. Grouting cylinder two; 4. Storage barrel one; 5. Storage barrel two; 6. Grouting pipe one; 7. Grouting pipe two; 8. Four-way connector; 9. Grouting pipe; 10. Grouting injection mechanism; 101. Feed pipe one; 102. Feed pipe two; 103. Mixing pipe; 104. Grouting head; 11. Pressure gauge; 12. Pressure relief valve. DETAILED DESCRIPTION

[0045] The present invention is further described below in conjunction with the accompanying drawings and embodiments. Unless otherwise defined, the technical terms or scientific terms used in the present invention should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs. The above-mentioned features or features mentioned in the specific examples mentioned in the present invention can be combined arbitrarily, and these specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0046] The method for preparing the grouting material based on polymer material used in the present invention comprises the following steps:

[0047] (1) Preparation of MDI prepolymer

[0048] Add polyol and part of diphenylmethane diisocyanate into the reaction kettle, react at 40-60°C for 1-3 hours to form an intermediate product containing a certain -NCO content, then add the remaining diphenylmethane diisocyanate to the intermediate product, and continue to react for 2-4 hours to allow the reaction to proceed fully to obtain an MDI type prepolymer. The mass ratio of diphenylmethane diisocyanate to polyol is 1.1:1. The polyol is one of polyoxypropylene glycol, polytetrahydrofuran glycol, adipic acid polyester polyol, and aromatic polyester polyol.

[0049] (2) Mixing MDI prepolymer with porous molecular sieve

[0050] The porous molecular sieve is added to the MDI type prepolymer, and stirred evenly at a speed of 320r / min to obtain a modified mixture. The mass ratio of the MDI type prepolymer to the porous molecular sieve is 2:1. The porous molecular sieve is one of 3A molecular sieve, XH-7 molecular sieve, XH-9 molecular sieve, and aluminum phosphate molecular sieve.

[0051] (3) adding the modified mixture obtained in step (2) to the bisphenol A epoxy resin, wherein the mass ratio of the modified mixture to the bisphenol A epoxy resin is 1:10, and after being dispersed and stirred evenly, the temperature is raised to 80-90° C. and the reaction is continued for 2 h to obtain component A.

[0052] (4) Component B is one of dibutyltin dilaurate, triethylamine, and dimethylbenzylamine. When performing grouting construction, component A and component B can be mixed.

[0053] Example 1

[0054] Figure 1 Schematic diagram of a coal mine shaft waterproofing and anti-seepage system based on polymer materials of the present invention. Figure 1 As shown, the present invention provides a coal mine shaft waterproofing and anti-seepage system based on polymer materials, including a grouting pump 1, a grouting cylinder 1 2, a grouting cylinder 2 3, a storage mechanism and a grouting injection mechanism 10, the tops of the grouting cylinder 1 2 and the grouting cylinder 2 3 are both connected to the grouting pump 1, the storage mechanism includes a storage barrel 1 4 and a storage barrel 2 5, the storage barrel 1 4 contains component A of the grouting material, and the storage barrel 2 5 contains component B of the grouting material.

[0055] The storage barrel 4 is connected to the bottom of the grouting cylinder 2 through the grouting pipe 6, and the storage barrel 25 is connected to the bottom of the grouting cylinder 23 through the grouting pipe 7. The middle parts of the grouting cylinder 2 and the grouting cylinder 3 are both provided with a four-way connector 8, and the four-way connector 8 is connected to the grouting injection mechanism 10 through the grouting pipe 9. After starting the grouting pump 1, the A component enters the grouting injection mechanism 10 through the grouting pipe 6, the grouting cylinder 2, the four-way connector 8 and the grouting pipe 9, and the B component enters the grouting injection mechanism 10 through the grouting pipe 7, the grouting cylinder 23, the four-way connector 8 and the grouting pipe 9. The four-way connector 8 is also connected to a pressure gauge 11 and a pressure relief valve 12. The real-time pressure during the grouting process can be observed through the pressure gauge 11. When the pressure exceeds the specified final pressure value, the pressure can be relieved through the pressure relief valve 12 to improve the safety of grouting.

[0056] The grouting injection mechanism 10 includes a feed pipe 101, a feed pipe 102 and a mixing pipe 103. One end of the feed pipe 101 and the feed pipe 102 are respectively connected to the slurry discharge pipe 9, and the other ends of the feed pipe 101 and the feed pipe 102 are connected to the mixing pipe 103 through a three-way connector. The mixing pipe 103 is connected to the grouting head 104. Component A enters the feed pipe 101 through the slurry discharge pipe 9, and component B enters the feed pipe 102 through the slurry discharge pipe 9, and then enters the mixing pipe 103 through the feed pipe 101 and the feed pipe 102 respectively for mixing. The setting of the mixing pipe 103 shows that component A and component B are fully mixed before injection, which improves the uniformity of the mixing of the two components and facilitates their rapid reaction after entering the borehole. The mixed grouting liquid is then poured into the borehole of the well wall through the grouting head 104, and penetrates into the cracks of the coal rock layer through the borehole, reacts quickly, and forms a solidified body with large volume, high compressive strength, good impermeability, and good plugging and reinforcement effect, achieving the water blocking effect at the leakage point of the well wall and improving the waterproof and anti-seepage properties of the well wall. After the grouting is completed, it is only necessary to pull the grouting head 104 out of the borehole and insert it into the next borehole for grouting. The grouting operation is simple, the construction preparation time is short, the hole change is convenient, the construction speed is fast, and the construction efficiency of grouting and water blocking is improved.

[0057] Example 2

[0058] The present invention is a coal mine shaft waterproofing and anti-seepage system based on polymer materials. It is applied to a coal mine deep shaft project. The net diameter of the main shaft is The well is 500m deep and the masonry thickness is 600mm. Among them, the modern alluvial and flood layers above 0-90 meters are mainly distributed in various valleys with a small thickness. The lithology of the middle and upper Pleistocene is yellowish silt and silty clay, with developed vertical joints, widely distributed on ridges and hillsides, with gravel layers at the bottom, and unconformable contact with the underlying strata. The project revealed that there were many leaks at the joints of the wellbore concrete pouring and masonry, and obvious water stains were visible on site. The treatment was carried out by post-grouting treatment of the well wall + reinforcement and repair of the well wall concrete. The grouting treatment adopts the upward type, that is, the lowest section is injected first, and then upward in sequence. The grouting locations are: the construction joints of the high (masonry) section of the well wall concrete pouring section and the water outlet.

[0059] The specific construction method includes the following steps:

[0060] S1. Prepare grouting materials

[0061] The component A of the grouting material (the polyol is polyoxypropylene glycol, and the porous molecular sieve is 3A molecular sieve) is poured into the storage barrel 4, and the component B of the grouting material (dibutyltin dilaurate) is poured into the storage barrel 5.

[0062] S2. Installation of waterproof and anti-seepage system for coal mine shaft

[0063] The grouting cylinder 1 2 and the grouting cylinder 2 3 are installed at the bottom of the grouting pump 1, the storage barrel 1 4 is connected to the grouting cylinder 2 through the grouting pipe 1 6, the storage barrel 2 5 is connected to the grouting cylinder 2 3 through the grouting pipe 2 7, the four-way connector 8 on the grouting cylinder 2 is connected to the feed pipe 101 of the grouting injection mechanism 10 through the grouting pipe 9, the four-way connector 8 on the grouting cylinder 2 3 is connected to the feed pipe 2 102 of the grouting injection mechanism 10 through the grouting pipe 9, and the installed coal mine shaft waterproofing and anti-seepage system is transported to the hanging platform at the construction site.

[0064] S3. Grouting hole design

[0065] Drill holes are arranged on the upper and lower sides of the construction joint of the concrete pouring section of the well wall, that is, two rows of holes are arranged in each section height (1.5 meters), the upper drill hole is 250-350mm away from the construction joint, the lower drill hole is 450-550mm away from the construction, the interval between two adjacent drill holes is 2.5-3.5m, and the drill holes on the upper and lower sides are staggered; the drill holes are perpendicular to the well wall, the drill holes are circular holes with an opening diameter of 42mm, and the designed depth of each drill hole is 3-5m.

[0066] S4. Grouting preparation

[0067] After drilling, a water pressure test is carried out to check whether the grouting pipeline meets the grouting requirements and to understand the water-richness of the rock formation. The water pressure test lasts about 15 minutes. The hydrostatic pressure is calculated, and then the grouting pressure is calculated based on the hydrostatic pressure at the injection point of the wellbore, and the grouting pressure is verified by the well wall strength at the same time.

[0068] The calculation of grouting pressure is:

[0069] P a =P0+1

[0070] P b =P0+3

[0071] P c =P0+5

[0072] Where, P0 is the hydrostatic pressure at the grouting point, MPa; P a is the initial grouting pressure, MPa; P b is the normal initial pressure, MPa; P c is the final grouting pressure, MPa.

[0073] Well wall strength verification is:

[0074]

[0075]

[0076] In the formula, P is the pressure that the wellbore can bear at the grouting location, MPa; E is the wellbore thickness; R0 is the net radius of the wellbore; K is the allowable compressive strength of the wellbore material, MPa; R is the ultimate compressive strength of the wellbore material; n is the safety factor, n=2.

[0077] S5. Grouting

[0078] The grouting head 104 of the grouting injection mechanism 10 is inserted into the borehole and temporarily wedged, the grouting pump 1 and the grouting injection mechanism 10 are turned on, and the component A and component B of the grouting material are injected into the borehole at the same time. After the grouting of the previous grouting hole is completed, it is quickly transferred to the next grouting hole.

[0079] S6. End grouting and clean the pipeline

[0080] After the grouting is completed, the grouting injection mechanism 10 is pulled out and flushed with component A of the grouting material; then the connection ends of the grouting pipe 1 6 and the grouting pipe 2 7 and the storage barrel 1 4 and the storage barrel 2 5 are disassembled, and the coal mine shaft waterproofing and anti-seepage system is cleaned with engine oil and clean water. After cleaning, the coal mine shaft waterproofing and anti-seepage system is disassembled and sorted.

[0081] After adopting the above construction method, there is no obvious water stain at the joint of the shaft concrete pouring and masonry, and a good grouting and water blocking effect is achieved.

[0082] Example 3

[0083] The difference from Example 2 is that the polyol of component A of the grouting material is polytetramethylene glycol, the porous molecular sieve is XH-7 molecular sieve, and component B of the grouting material is triethylamine.

[0084] Example 4

[0085] The difference from Example 2 is that the polyol of component A of the grouting material is adipic acid-based polyester polyol, the porous molecular sieve is XH-9 molecular sieve, and component B of the grouting material is dimethylbenzylamine.

[0086] Example 5

[0087] The difference from Example 2 is that the polyol of component A of the grouting material is an aromatic polyester polyol, the porous molecular sieve is an aluminum phosphate molecular sieve, and component B of the grouting material is dimethylbenzylamine.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A waterproof and anti-seepage system for coal mine shafts based on polymer materials, characterized by: It includes a grouting pump, a grouting cylinder 1, a grouting cylinder 2, a material storage mechanism and a grouting injection mechanism. The tops of the grouting cylinder 1 and the grouting cylinder 2 are both connected to the grouting pump. The material storage mechanism includes a material storage barrel 1 and a material storage barrel 2. The material storage barrel 1 is connected to the bottom of the grouting cylinder 1 through a grouting suction pipe 1, and the material storage barrel 2 is connected to the bottom of the grouting cylinder 2 through a grouting suction pipe 2. The middle parts of the grouting cylinder 1 and the grouting cylinder 2 are both provided with four-way connectors, and the four-way connectors are connected to the grouting injection mechanism through grouting discharge pipes.

2. A coal mine shaft waterproofing and anti-seepage system based on polymer materials according to claim 1, characterized in that: The grouting injection mechanism includes a feed pipe 1, a feed pipe 2 and a mixing pipe. One end of the feed pipe 1 and the feed pipe 2 are connected to the slurry discharge pipe respectively, and the other ends of the feed pipe 1 and the feed pipe 2 are connected to the mixing pipe through a three-way connector, and the mixing pipe is connected to the grouting head.

3. The polymer material-based coal mine shaft waterproofing and anti-seepage system according to claim 1, characterized in that: A pressure gauge and a pressure relief valve are also connected to the four-way connector.

4. The polymer material-based coal mine shaft waterproofing and anti-seepage system according to claim 1, characterized in that: The first storage barrel contains component A of the grouting material, and the second storage barrel contains component B of the grouting material.

5. A coal mine shaft waterproofing and anti-seepage system based on polymer materials according to claim 4, characterized in that: The A component comprises bisphenol A epoxy resin, diphenylmethane diisocyanate, polyol and porous molecular sieve.

6. A coal mine shaft waterproofing and anti-seepage system based on polymer materials according to claim 5, characterized in that: The polyol includes one or more of polyoxypropylene glycol, polytetramethylene glycol, adipic acid polyester polyol, and aromatic polyester polyol.

7. The polymer material-based coal mine shaft waterproofing and anti-seepage system according to claim 5, characterized in that: The porous molecular sieve includes one or more of 3A molecular sieve, XH-7 molecular sieve, XH-9 molecular sieve and aluminum phosphate molecular sieve.

8. The polymer material-based coal mine shaft waterproofing and anti-seepage system according to claim 4, characterized in that: Component B includes one of dibutyltin dilaurate, triethylamine and dimethylbenzylamine.

9. A construction method for a coal mine shaft waterproofing and anti-seepage system based on polymer materials according to any one of claims 1 to 8, characterized in that: The following steps are included: S1. Prepare grouting materials Pour component A of the grouting material into storage barrel 1, and pour component B of the grouting material into storage barrel 2; S2. Installation of waterproof and anti-seepage system for coal mine shaft Install the grouting cylinder 1 and the grouting cylinder 2 at the bottom of the grouting pump, connect the material storage barrel 1 with the grouting cylinder 1 through the grouting suction pipe 1, connect the material storage barrel 2 with the grouting cylinder 2 through the grouting suction pipe 2, connect the four-way connector on the grouting cylinder 1 with the feed pipe 1 of the grouting injection mechanism through the grouting discharge pipe, connect the four-way connector on the grouting cylinder 2 with the feed pipe 2 of the grouting injection mechanism through the grouting discharge pipe, and transport the installed coal mine shaft waterproofing and anti-seepage system to the hanging tray at the construction site; S3. Grouting hole design Drill holes are arranged on both sides of the construction joint at the height of the concrete pouring section of the well wall. The upper drill hole is 250-350mm away from the construction joint, and the lower drill hole is 450-550mm away from the construction joint. The spacing between two adjacent drill holes is 2.5-3.5m, and the drill holes on the upper and lower sides are staggered. The drill holes are perpendicular to the well wall, and the drill holes are circular holes with an opening diameter of 42mm. The design depth of each drill hole is 3-5m. S4. Grouting preparation After drilling the hole, a water pressure test is carried out to calculate the hydrostatic pressure. Then the grouting pressure is calculated based on the hydrostatic pressure at the injection point of the wellbore, and the grouting pressure is verified by the wellbore wall strength at the same time. S5. Grouting Insert the grouting head of the grouting injection mechanism into the borehole and temporarily wedge it, turn on the grouting pump and the grouting injection mechanism, and inject component A and component B of the grouting material into the borehole at the same time. After the grouting of the previous grouting hole is completed, quickly move to the next grouting hole; S6. End grouting and clean the pipeline After the grouting is completed, the grouting injection mechanism is pulled out and flushed with component A of the grouting material; then the connecting ends of the grouting pipe 1 and the grouting pipe 2 and the storage barrel 1 and the storage barrel 2 are disassembled, and the coal mine shaft waterproofing and anti-seepage system is cleaned with engine oil and clean water. After cleaning, the coal mine shaft waterproofing and anti-seepage system is disassembled and sorted.

10. The construction method of a coal mine shaft waterproofing and anti-seepage system based on polymer materials according to claim 9, characterized in that: In step S4, the grouting pressure is calculated as: P a =P0+1 P b =P0+3 P c =P0+5 Where, P0 is the hydrostatic pressure at the grouting point, MPa; P a is the initial grouting pressure, MPa; P b is the normal initial pressure, MPa; P c is the final grouting pressure, MPa; Well wall strength verification is: In the formula, P is the pressure that the wellbore can bear at the grouting location, MPa; E is the wellbore thickness; R0 is the net radius of the wellbore; K is the allowable compressive strength of the wellbore material, MPa; R is the ultimate compressive strength of the wellbore material; n is the safety factor, n=2.

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