CN113309522B - Construction method for pre-grouting water plugging concrete grout stop pad on working surface of kilometer vertical shaft - Google Patents
Construction method for pre-grouting water plugging concrete grout stop pad on working surface of kilometer vertical shaft Download PDFInfo
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- CN113309522B CN113309522B CN202110680870.8A CN202110680870A CN113309522B CN 113309522 B CN113309522 B CN 113309522B CN 202110680870 A CN202110680870 A CN 202110680870A CN 113309522 B CN113309522 B CN 113309522B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 239000011440 grout Substances 0.000 title claims abstract description 77
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 238000001914 filtration Methods 0.000 claims abstract description 68
- 239000004568 cement Substances 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 10
- 238000007493 shaping process Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 7
- 239000011435 rock Substances 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 claims abstract description 6
- 230000000903 blocking effect Effects 0.000 claims abstract description 3
- 238000004880 explosion Methods 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000004575 stone Substances 0.000 claims description 12
- 235000019353 potassium silicate Nutrition 0.000 claims description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- 238000005422 blasting Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000002706 hydrostatic effect Effects 0.000 claims description 2
- 238000004088 simulation Methods 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 9
- 230000036571 hydration Effects 0.000 abstract description 4
- 238000006703 hydration reaction Methods 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/04—Lining shafts; Linings therefor with brick, concrete, stone, or similar building materials
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/12—Accessories for making shaft linings, e.g. suspended cradles, shutterings
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention belongs to the technical field of grout stop pad construction, and particularly relates to a construction method of a pre-grouting water plugging concrete grout stop pad on a working surface of a kilometer vertical shaft, which comprises the following construction steps: shaping and reinforcing support of a grout stopping pad: shaping the grout stopping pad, namely shaping by adopting an air pick after forming the appearance of the grout stopping pad by adopting an explosion method according to design; the reinforced support refers to anchor rod drilling, slurry spraying and shaft water spraying treatment at the rock crushing place: the shaft water spraying treatment is characterized in that a water receiving tank and a water blocking shed are additionally arranged on a hanging scaffold, the invention provides a spherical crown-shaped water filtering layer, and water channels are radially cut on the spherical crown-shaped water filtering layer to guide water flow of a water outlet point of a working surface into the spherical crown-shaped water filtering layer, so that the action area of the water flow on a concrete grout stop pad can be effectively reduced, namely the upward acting force of fracture water on the grout stop pad is reduced. And meanwhile, the radiating pipe is arranged during construction, so that when the concrete grout-stopping pad is poured, the heat dissipation of cement hydration heat is increased, and the pouring quality of the concrete grout-stopping pad is ensured.
Description
Technical Field
The invention relates to the technical field of grout stop pad construction, in particular to a construction method of a pre-grouting water plugging concrete grout stop pad on a working surface of a kilometer vertical shaft.
Background
Along with the gradual depletion of high-quality metal resources in shallow parts, the exploitation of mineral resources at the kilometer level and even deeper becomes an industry development trend, so that the construction technology of the kilometer level vertical shaft is urgent. The deep well exploitation throat is in the vertical shaft, and the bottleneck of vertical shaft tunneling lies in the water damage control of aquifers. In the construction of ultra-deep vertical shaft, the working face is usually pre-grouted for water plugging. Compared with a shallow water-containing stratum, the deep stratum has worse geological environment, and has the characteristics of obvious high ground stress, high rock temperature, high fracture water pressure and the like, so that stricter requirements are put forward on a grouting water plugging technology.
The deep well working face pre-grouting has the main characteristics that: and (1) bearing capacity of the pulp stopping pad. Under the action of deep high ground stress, the internal water guide channel of the water-bearing stratum is compressed and even closed, and then the bearing capacity of the grout stopping pad needs to be large enough to ensure that the designed grouting pressure injects grout into the fracture of the water-bearing stratum. Meanwhile, under the action of deep high fracture water pressure, the upward acting force of the fracture water pressure on the grout stopping pad is also obviously increased; and (2) the heat dissipation capability of the slurry stopping pad. Along with ending the improvement of thick liquid pad bearing capacity, ending thick liquid pad and inevitably developing to "big, thick" shape orientation, need end at this moment and fill up to have the heat dissipation function to can in time dispel the heat after making to pour bulky concrete, guarantee to end the pouring quality of thick liquid pad. Meanwhile, at deep high rock temperature, the narrow space of the working surface of the vertical shaft is not favorable for heat dissipation, and the cement hydration heat reaction can be influenced. In summary, for the deep formation grouting water plugging technology, not only is a higher bearing capacity requirement of the grout stopping pad required, but also the heat dissipation capacity of the grout stopping pad needs to be considered. The existing design of the vertical shaft grouting water plugging grout stopping pad is designed by adopting a conventional empirical formula, the higher requirements of deep high ground stress and high water pressure on the bearing capacity cannot be fully considered, and the influence of deep high rock temperature on cement hydration heat cannot be considered. Aiming at the problem, the invention provides a construction method of a grout stopping pad with high bearing capacity and a heat dissipation function, which ensures the grouting effect, and provides a construction method of a pre-grouting water plugging concrete grout stopping pad on a kilometer vertical shaft working face.
Disclosure of Invention
The invention aims to provide a construction method of a pre-grouting water plugging concrete grout stop pad on a working surface of a kilometer vertical shaft, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a construction method of a pre-grouting water plugging concrete grout stop pad on a working surface of a kilometer vertical shaft comprises the following construction steps:
s1, shaping and reinforcing support of a grout stopping pad: the shaping of the grout stopping pad is to adopt an air pick to shape after the appearance of the grout stopping pad is formed by adopting an explosion method according to the design; the reinforced support refers to bolting and guniting at a rock crushing place;
s2, wellbore water spraying treatment: the shaft water spraying treatment means that a water receiving tank and a water blocking shed are additionally arranged on the hanging scaffold, and well wall water spraying is collected and does not enter a working surface;
s3, manufacturing a spherical crown-shaped water filtering space: the spherical-crown-shaped water filtering space is manufactured by taking the center of a vertical shaft working face as a circle center and adopting a smooth blasting method, wherein the diameter of the spherical-crown-shaped water filtering space is smaller than the diameter of a pierced shaft, and bedrock fracture water burst of the working face is collected;
s4, installing a water filtering tank: the installation of the water filter tank is that a square bottomless water filter tank is installed in a spherical crown-shaped water filtering space, a water filter screen is arranged on the periphery of the square bottomless water filter tank, and the upper surface of the square bottomless water filter tank is processed by a steel plate;
s5, building a spherical crown-shaped water filtering layer: the spherical crown shaped water filtering layer is built by putting broken stones with different grain diameters and the broken stones after blasting down through the ash chute pipe, adjusting the broken stones to be with a designed grain diameter ratio, laying the broken stones in a spherical crown space, and forming a slope shape during laying, namely, the middle is high and two sides are low;
s6, cutting a water tank along the radial direction: the water tank is excavated along the rough diameter of the shaft to the water filtering tank by taking the water outlet point of the working surface as a starting point, water flow is guided to be collected in a centralized manner, and simultaneously, hydrostatic pressure of the water outlet point in the vertical direction is converted into horizontal acting force along the rough diameter;
s7, paving a waterproof layer: the waterproof layer is laid by covering the spherical-crown-shaped water filtering layer with air cylinder cloth, and separating the spherical-crown-shaped water filtering layer from the pulp stopping pad;
s8, installing a water filtering bucket and a radiating pipe: the water filtering bucket is characterized in that a seamless steel pipe is connected right above the water filtering box through bolts, smooth steel bars are welded outside the steel pipe, and the distance between the steel bars is not less than 1m so as to increase the connection strength between the water filtering bucket and concrete; the radiating pipes are 4 orifice pipes arranged along the circumferential direction of the water filtering barrel and used for cooling and guiding during pouring and curing of the grout stop pad, and the radiating pipes are used for reinforcing the spherical-crown-shaped water filtering layer after curing;
s9, setting up a temporary working platform: the temporary working platform is erected in a shaft wall building template, is used for vibrating when concrete is poured, and is continuously lifted upwards along with the increase of the pouring height of the grout stopping pad;
s10, pouring a cone-shaped concrete grout stop pad: the step of pouring the circular truncated cone-shaped concrete grout stop pad is that the concrete grade and the mixing proportion of the grout stop pad are determined according to the simulation result of the temperature field of the large-volume concrete pouring body, then the vibrated concrete is poured in layers, and the pouring sequence of each layer is pushed from one side to the other side, so that the grout stop pad and the well wall are tightly fit into a whole.
Preferably, the height of the pulp stopping pad is 15m.
Preferably, the grout stopping pad is poured mainly by using PO.42.5R ordinary portland cement grout, and when grout running, grout mixing and grouting and hole sealing are performed, cement grout and water glass grout are adopted, wherein the water glass concentration is 30Be, and the ratio of the cement grout to the water glass grout is 1.
Preferably, the depth of the spherical-crown-shaped drainage layer is more than 400mm.
The invention has the beneficial effects that:
the invention has the beneficial effects that the spherical crown-shaped water filtering layer is provided for the first time, and the water tank is radially dug on the spherical crown-shaped water filtering layer, so that the water flow at the water outlet point of the working surface is led into the spherical crown-shaped water filtering layer, the action area of the water flow on the concrete grout stop pad can be effectively reduced, namely the upward acting force of fracture water on the grout stop pad is reduced. And meanwhile, the radiating pipe is arranged during construction, so that when the concrete grout-stopping pad is poured, the heat dissipation of cement hydration heat is increased, and the pouring quality of the concrete grout-stopping pad is ensured.
Drawings
FIG. 1 is a flow chart of the construction of the present invention;
FIG. 2 is a view for manufacturing a spherical-crown-shaped water filtering space;
FIG. 3 illustrates the installation of a water filter tank;
FIG. 4 is a masonry spherical crown-shaped water filtering layer;
FIG. 5 is a top view of the radially excavated water trough;
FIG. 6 shows the installation of a water filtering barrel, a heat dissipation pipe and a temporary working platform;
FIG. 7 is a top view of a temporary work platform for installing a water filtering barrel, a radiating pipe and building;
FIG. 8 shows concrete grout stop pad placement.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Examples
The construction method of the pre-grouting water plugging concrete grout stop pad on the working surface of the kilometer vertical shaft, disclosed by the invention, has the construction flow chart shown in figure 1, and comprises the following steps:
the first step is as follows: shaping and reinforcing support by the grout stopping pad. According to the size design of the grout stopping pad, a shape space of the grout stopping pad is manufactured at a designed position by adopting a smooth blasting method, and a pneumatic pick is adopted for shaping, so that the anchor net temporary support is carried out on the complete development of the joint crack of the surrounding rock;
the second step: and (5) well bore water spraying treatment. A contact groove is arranged above the hanging scaffold, and a water-stopping shed is arranged on the upper layer disc and the middle layer disc of the hanging scaffold to receive scattered water above the contact groove, the scattered water is collected and then is connected to a water transfer station or an upper hanging scaffold water tank through a hose, and the scattered water is guided into a water filtering bucket through the hose;
the third step: and manufacturing a spherical-crown-shaped water filtering space. And brushing the elevation of the large working surface part by adopting a smooth blasting method, and manufacturing a spherical crown-shaped water filtering space in the center of a shaft. See figure 2 for details;
the fourth step: and (5) installing a water filtering tank. A square bottomless water filter tank of 1.0m is arranged at the position of the water detection hole, a water filter screen of 5mm is arranged on the periphery, and the upper surface of the water filter tank is processed by a steel plate of delta 16 mm. See FIG. 3 for details;
the fifth step: and building a spherical crown-shaped water filtering layer. And screening the drill stones after shaft tunneling blasting, and selecting the broken stones required by design to lay. The paved stones are slope-shaped, namely the middle is high, the two sides are low, the filtering bucket is covered by the middle stones, and the average thickness of the paved stones is not less than 200mm. See figure 4 for details;
and a sixth step: and cutting the water tank along the radial direction. The water filtering tank is arranged along the direction of the rough diameter by taking the water outlet point as a starting point, and the depth of the water filtering tank is preferably more than 400mm. See fig. 5 for details;
the seventh step: and laying a waterproof layer. Covering an air duct cloth above the broken stone to separate the spherical crown-shaped water filtering layer from the grout stop pad, preventing cement paste from leaking into the spherical crown-shaped water filtering layer during concrete pouring, and preventing the grout stop pad from being locally washed after the water level of the spherical crown-shaped water filtering layer is raised;
eighth step: a water filtering barrel and a radiating pipe are installed. A seamless steel pipe (namely a water filtering barrel) is arranged right above the water filtering tank and is connected with the water filtering tank through bolts. Meanwhile, 10 circles of 20 smooth steel bars are welded outside the seamless steel pipe, the distance between the steel bars is not less than 1m, the purpose is to reduce water leakage along the water filtering bucket, and the connection strength between the water filtering bucket and concrete is enhanced. And then, installing a phi 108 high-pressure valve at the top position of the steel pipe. And finally, 1 submersible pump is respectively installed in the water filtering barrel and suspended by a large-grab suspension rope. See figures 6 and 7 for details.
4 auxiliary holes are arranged along the circumferential direction of the water filtering barrel, and phi 108 multiplied by 5 multiplied by 16000mm hole tubes are pre-buried to be used as radiating tubes. The water filtering bucket and the radiating pipe are properly adjusted according to the field condition, but the clear distance between the edges of the two water filtering buckets is not less than 2000mm, and the clear distance between the auxiliary pipe and the water filtering bucket is not less than 1500mm. See fig. 6, 7 for details;
the ninth step: and (5) setting up a temporary working platform. Placing ash and vibrating on a simple working platform erected at the middle lower part of the shaft template, continuously pouring the grout stopping pad upwards, and lifting the template to complete pouring;
the tenth step: and pouring the cone-shaped concrete grout stop pad. According to construction conditions such as environment temperature, heat dissipation conditions, concrete types, cementing material types, cement types and the like, a temperature field model is established, and the adiabatic temperature rise, the maximum surface temperature difference and the cooling rate are calculated to determine the mixing proportion of the concrete and the added admixture. Continuous construction is required for pouring, the maximum discontinuous time is controlled within the initial setting time of concrete and is not more than 2 hours, layered pouring is carried out, the pouring of each layer is sequentially pushed from one side to the other side, and the direction is kept consistent as much as possible each time. During pouring, the vibrating rod is controlled to vibrate the concrete, because the shaft is provided with pouring water, the water-cement ratio of the concrete is increased due to excessive vibration, the strength of the concrete is reduced, and a flat vibrator can be adopted, and the details are shown in an attached figure 8. The height of the grout stopping pad is 15m, the pouring of the grout stopping pad is mainly performed by PO.42.5R ordinary portland cement grouting, and cement grout and water glass grout are adopted when grout running, grout stringing and grouting hole sealing are performed, wherein the water glass concentration is 30Be, and the proportion of the cement grout to the water glass grout is 1.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A construction method of a pre-grouting water plugging concrete grout stop pad on a working surface of a kilometer vertical shaft is characterized by comprising the following construction steps:
s1, shaping and reinforcing support of a grout stopping pad: the shaping of the grout stopping pad is to adopt an air pick to shape after the appearance of the grout stopping pad is formed by adopting an explosion method according to the design; the reinforcing support means bolting and guniting at a rock crushing place;
s2, wellbore water spraying treatment: the shaft water spraying treatment means that a water receiving tank and a water blocking shed are additionally arranged on the hanging scaffold, and well wall water spraying is collected and does not enter a working surface;
s3, manufacturing a spherical crown-shaped water filtering space: the spherical-crown-shaped water filtering space is manufactured by taking the center of a vertical shaft working face as a circle center and adopting a smooth blasting method, wherein the diameter of the spherical-crown-shaped water filtering space is smaller than the diameter of a pierced shaft, and bedrock fracture water burst of the working face is collected;
s4, installing a water filter tank: the installation of the water filtering box is that a square bottomless water filtering box is installed in a spherical crown shaped water filtering space, water filtering nets are arranged on the periphery of the square bottomless water filtering box, and the upper surface of the square bottomless water filtering box is processed by a steel plate;
s5, building a spherical crown-shaped water filtering layer: the spherical crown shaped water filtering layer is built by putting broken stones with different grain diameters down through an ash chute and adjusting the broken stones after blasting into a designed grain diameter ratio, and then paving in a spherical crown space, wherein the slope type is required to be formed during paving, namely the middle is high and the two sides are low;
s6, cutting a water tank along the radial direction: the water tank is excavated along the rough diameter of the shaft to the water filtering tank by taking the water outlet point of the working surface as a starting point, water flow is guided to be collected in a centralized manner, and simultaneously, hydrostatic pressure of the water outlet point in the vertical direction is converted into horizontal acting force along the rough diameter;
s7, paving a waterproof layer: laying the waterproof layer means that the spherical crown-shaped water filtering layer is covered with air cylinder cloth, and the spherical crown-shaped water filtering layer is separated from the pulp stopping pad;
s8, installing a water filtering barrel and a radiating pipe: the water filtering bucket is characterized in that a seamless steel pipe is connected right above the water filtering box through bolts, smooth steel bars are welded outside the steel pipe, and the distance between the steel bars is not less than 1m so as to increase the connection strength between the water filtering bucket and concrete; the radiating pipes are 4 orifice pipes arranged along the circumferential direction of the water filtering barrel and used for cooling and guiding during pouring and curing of the grout stop pad, and the radiating pipes are used for reinforcing the spherical-crown-shaped water filtering layer after curing;
s9, setting up a temporary working platform: the temporary working platform is erected in a shaft wall building template for vibrating when concrete is poured, and the working platform is continuously lifted upwards along with the increase of the pouring height of the grout stopping pad;
s10, pouring a cone-shaped concrete grout stop pad: the step of pouring the circular truncated cone-shaped concrete grout stop pad is that the grade and the mixing proportion of concrete used by the grout stop pad are determined according to the simulation result of the temperature field of the large-volume concrete pouring body, then vibrating concrete is poured in layers, and the pouring sequence of each layer is pushed to the other side from one side, so that the grout stop pad and the well wall are tightly integrated.
2. The construction method of the pre-grouting water plugging concrete grout stop pad on the working surface of the kilometer vertical shaft as recited in claim 1, wherein the height of the grout stop pad is 15m.
3. The construction method of the pre-grouting water plugging concrete grout stop pad on the working surface of the kilometer vertical shaft as recited in claim 1, wherein the grout stop pad is mainly poured by PO.42.5R ordinary portland cement grout, cement grout and water glass grout are adopted when running, stringing and grouting hole sealing are performed, the water glass concentration is 30Be, and the ratio of the cement grout to the water glass grout is 1.
4. The construction method of the pre-grouting water plugging concrete grout stop pad on the working surface of the kilometer vertical shaft as recited in claim 1, wherein the depth of the spherical-crown-shaped drainage layer is more than 400mm.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108869A (en) * | 2010-12-30 | 2011-06-29 | 山东科技大学 | Grout stop pad construction method for kilometer vertical shaft grouting for water control |
| CN103046932A (en) * | 2012-12-22 | 2013-04-17 | 中冶集团武汉勘察研究院有限公司 | Pre-grouting and water plugging method for permeable layer in vertical shaft |
| CN104453913A (en) * | 2014-12-19 | 2015-03-25 | 玉溪大红山矿业有限公司 | Vertical shaft working face ahead pre-grouting method |
| CN108119143A (en) * | 2017-12-20 | 2018-06-05 | 湖南科技大学 | A kind of vertical shaft working surface cement soluble glass paste combines grouting method with chemical grout double-round curtain |
| CN112012746A (en) * | 2020-07-26 | 2020-12-01 | 中铁二院工程集团有限责任公司 | Construction method of railway tunnel deep and large vertical shaft under condition of thick-layer water-rich broken zone |
| CN112746849A (en) * | 2020-12-11 | 2021-05-04 | 中国矿业大学 | Shaft water-carrying digging and building method |
-
2021
- 2021-06-19 CN CN202110680870.8A patent/CN113309522B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108869A (en) * | 2010-12-30 | 2011-06-29 | 山东科技大学 | Grout stop pad construction method for kilometer vertical shaft grouting for water control |
| CN103046932A (en) * | 2012-12-22 | 2013-04-17 | 中冶集团武汉勘察研究院有限公司 | Pre-grouting and water plugging method for permeable layer in vertical shaft |
| CN104453913A (en) * | 2014-12-19 | 2015-03-25 | 玉溪大红山矿业有限公司 | Vertical shaft working face ahead pre-grouting method |
| CN108119143A (en) * | 2017-12-20 | 2018-06-05 | 湖南科技大学 | A kind of vertical shaft working surface cement soluble glass paste combines grouting method with chemical grout double-round curtain |
| CN112012746A (en) * | 2020-07-26 | 2020-12-01 | 中铁二院工程集团有限责任公司 | Construction method of railway tunnel deep and large vertical shaft under condition of thick-layer water-rich broken zone |
| CN112746849A (en) * | 2020-12-11 | 2021-05-04 | 中国矿业大学 | Shaft water-carrying digging and building method |
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