AU2023226534A1 - Pre-grouting treatment method for water hazards in shaft construction - Google Patents
Pre-grouting treatment method for water hazards in shaft construction Download PDFInfo
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- AU2023226534A1 AU2023226534A1 AU2023226534A AU2023226534A AU2023226534A1 AU 2023226534 A1 AU2023226534 A1 AU 2023226534A1 AU 2023226534 A AU2023226534 A AU 2023226534A AU 2023226534 A AU2023226534 A AU 2023226534A AU 2023226534 A1 AU2023226534 A1 AU 2023226534A1
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- shaft
- grouting
- holes
- treatment
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 238000011282 treatment Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000005553 drilling Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 3
- 230000003631 expected effect Effects 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 abstract description 10
- 238000002203 pretreatment Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- 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
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A pre-grouting treatment method for water hazards in shaft construction, the method mainly comprising the steps of: performing surveying and setting out to obtain the plane position and downhole position of a shaft; analyzing geological data of the shaft to determine a zone of a lower section of the shaft that needs a grouting treatment; constructing an annular surrounding roadway (1) in the lower section of the shaft; constructing grouting drill holes (2) upwards in the lower section of the shaft to perform a pre-grouting treatment on an aquifer; after the grouting treatment on the lower section of the shaft is completed, performing a filling treatment on the annular surrounding roadway (1); normally excavating the shaft downwards to penetrate the treated aquifer in the lower section; and finally completing the construction of the shaft. The method is suitable for operating conditions in which there has been a roadway around the bottom of a shaft, the shaft is at a great depth, and an aquifer is mainly located in a bottomhole section. By means of the method, the upper-section excavation and lower-section water hazard pre-treatment of a shaft can be performed synchronously and operated in parallel, thereby reducing the time consumed by conventional grouting-from-the surface and pre-grouting-from-the-working-face, and thus saving on the overall shaft construction time.
Description
[0001] The present invention relates to the field of an underground hazards treatment in a coal mine, and specifically to a pre-grouting treatment method for water hazards in a shaft construction.
[0002] The shaft is utilized in the shaft mine to establish the connection between the upper section and the lower section of the mine, which is the throat of the mine. The current shaft sinking methods comprise a freezing method, a caisson method, a drilling method and a common method. When the common method is utilized in shaft construction, the aquifer water hazards that the shaft requires to penetrate can be treated by the pre-grouting method, or a method of excavation and masonry with water in a shaft disclosed in Chinese patent CN112746849B can also be utilized for water hazard prevention and control.
[ 0003] At present, there are two common pre-grouting treatment methods for water hazards in the shaft constructions: the ground pre-grouting method and the working face pre-grouting method. After the shaft construction is completed, the residual leakage point of the shaft wall can be treated by back-wall grouting. The ground pre-grouting is mainly used for the strata with numerous aquifers and large spans. By constructing multiple boreholes on the ground before the shaft construction to the lowest aquifer, each aquifer is controlled by segmented grouting, and the shaft is excavated after the grouting is completed. The working face pre-grouting means that after the shaft is excavated to a certain distance from the aquifer, the excavation is terminated, and a plurality of grouting holes are constructed on the working surface to carry out the grouting, and the shaft is excavated again after the grouting is completed. In addition, a grouting method is also proposed in a process of a multi-working face parallel operation on a ground pre-grouting of a shaft disclosed by the Chinese patent CN103233699A, in which first section of the grouting still occupies the shaft construction time, and the effective engineering amount of the second and third sections of the ground grouting drilling is little and the cost is high. At present, a lot of shaft construction time is occupied by the commonly used shaft grouting methods.
[0004] In view of the above technical deficiencies, the objectives of the present invention are to provide a pre-grouting treatment method for water hazards in a shaft construction, which controls a pre-grouting treatment on an aquifer at the bottom section of the shaft by constructing grouting drill holes upwards at the bottom of the shaft. In the method, the normal excavation of the upper section of the shaft during the process of grouting is not affected, the synchronization of grouting and shaft excavation is truly implemented, and the progress of the shaft construction is not affected.
[ 0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.
[ 0006] Provided in the present invention is a pre-grouting treatment method for water hazards in a shaft construction. The method includes the following steps.
[ 0007] In Step 1, a center point of a shaft on the ground is surveyed and set out, a position of a bottom of the shaft is surveyed and set out.
[ 0008] In Step 2, geological data for the shaft are analyzed to determine a zone of the lower section of the shaft that requires a grouting treatment.
[ 0009] In Step 3, an upper section of the shaft is constructed normally, a connecting roadway towards the bottom of the shaft is constructed, the annular surrounding roadway is constructed around the bottom of the shaft and a temporary drainage system is established.
[0010] In Step 4, the aquifer in the lower part of the shaft is treated by pre-grouting by drilling the hole upward in the annular surrounding roadway.
[0011] In Step 5, after the pre-grouting treatment at the lower section of the shaft is completed, a filling treatment on the annular surrounding roadway is performed, the shaft is excavated downwards normally to penetrate the treated aquifer at the lower section of the shaft.
[0012] In Step 6, the shaft is excavated downwards normally to a designed depth position of the shaft, the relevant support works are completed, a connection between the bottom of the shaft and downhole roadways is established, and a construction of the shaft is completed.
[0013] Preferably, in Step 3, connecting roadway is constructed at the bottom of the shaft through original downhole roadways, and the annular surrounding roadway is constructed around the bottom of the shaft.
[ 0014] Preferably, in Step 3, the annular surrounding roadway is 6 m to 8 m away from an outer wall of the shaft with a height of 4 m high and a width of 3 m, is capable of accommodating an underground tunnel drilling rig for operation.
[ 0015] Preferably, in Step 4, a plurality of equispaced grouting drill holes are arranged vertically upward by taking the annular surrounding roadway constructed around the shaft as a drilling field, depths of the grouting drill holes reach an uppermost aquifer, and grouting operations are performed through the grouting drill holes.
[ 0016] Preferably, in Step 4, a construction method of the grouting drill holes is as follows: firstly, the plurality of grouting drill holes are constructed uniformly, and then checking supplementary-grouting holes are constructed complementally in intervals between adjacent grouting drill holes.
[ 0017] When no water flows out of the checking-supplementary-grouting holes, it indicates that an expected grouting effect is reached, and then the grouting is terminated.
[ 0018] When water remains flowing out of the checking-supplementary-grouting holes, the grouting for the checking-supplementary-grouting holes is completed, subsequently, a second round of checking-supplementary-grouting holes are constructed in the intervals between the constructed grouting drill holes, in this way, until no water flows out of the checking supplementary-grouting holes, an effective curtain of the grouting is formed, and an expected effect of the grouting is formed.
[ 0019] The beneficial effects of the present invention are as follows. the present invention is suitable for the operating conditions in which there is a roadway around the bottom of the shaft, the shaft depth is at a great depth, and an aquifer is mainly located at the bottom of the shaft, which can implement the synchronization and parallel operation of the upper section excavation and the lower section water hazard pre-treatment of the shaft, thereby reducing the time consumed by conventional grouting from the surface and pre-grouting from the working face, and thus saving on the overall shaft construction time.
[0020] In order to explain the technical solutions in the embodiments of the present invention or the prior art more clearly, the following is a brief introduction on the drawings required to be used in the descriptions of the embodiments or the prior arts. It is obvious that the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.
[ 0021] FIG. 1 illustrates a structural schematic diagram of a pre-grouting treatment method for water hazards in a shaft construction provided in the embodiments of the present invention.
[ 0022] FIG. 2 illustrates a schematic diagram of a formation of a waterproof curtain provided in the embodiments of the present invention.
[ 0023] Brief descriptions on the numerals of the drawings are as follows.
[ 0024] 1. Annular surrounding roadway; 2. Grouting drill hole; 3. Waterproof curtain.
[ 0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It will be apparent that the described embodiments are merely one part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without any creative efforts shall fall within the protection scope of the present invention.
[ 0026] As illustrated in FIGS. 1 to 2, provided is a pre-grouting treatment method for water hazards in a shaft construction. The method includes the following steps.
[ 0027] 1. The survey and set-out of the plane position and the downhole position of the shaft:. according to the design drawings of the shaft, the center point on the ground of the shaft is surveyed and set out, the position for the bottom of the shaft is surveyed and set out.
[ 0028] 2. The analysis of the geological data for the shaft to determine the zone of the lower section that requires the grouting treatment: the data for the shaft are collected, sort out and analyzed to determine such as the location, structure and thickness of the aquifer that requires to be treated in the lower-section of the shaft.
[0029] 3. The normal construction at the upper-section of the shaft and the excavation of the annular surrounding roadway grouted at the lower-section: the excavation of the upper-section of the shaft is carried out, and the connecting roadway (the roadway is not wasted, even if other shaft construction methods are used, this roadway will also be constructed in the later stage) are constructed simultaneously through the original downhole roadways, and the annular surrounding roadway is constructed around the bottom of the shaft. The roadway is 6 m to -8 m away from the outer wall of the shaft with the height of 4 m and the width of 3 m, which can accommodate an underground tunnel drilling rig for operation.
[ 0030] At the same time, the temporary drainage system is constructed or pipelines are laid downhole to discharge the water flew out from the grouting drill holes 2 in the later stage in the annular surrounding roadway 1.
[ 0031] 4. The normal construction at the upper-section of the shaft, the pre-grouting treatment on an aquifer at the lower section of the shaft by constructing grouting drill holes upwards: the upper-section of the shaft is continued to be excavated normally, and the grouting operation of the aquifer at the lower section is performed simultaneously, grouting drill holes 2 are arranged upward vertically by taking the annular surrounding roadway 1 constructed around the shaft as a drilling field, the depths of the grouting drill holes 2 reach an uppermost aquifer, and the grouting operations are performed through the grouting drill holes 2.
[ 0032] The opened positions of the grouting drill holes 2 are located in the annular surrounding roadway 1, the grouting drill holes 2 are arranged equidistantly, and the construction is carried out by selecting holes at intervals. Firstly, 24 grouting drill holes are constructed uniformly, and then the checking-supplementary-grouting holes are constructed complementally in intervals between 4 adjacent grouting drill holes 2. When no water flows out of the checking-supplementary-grouting holes, it indicates that an expected grouting effect is reached, and then the grouting is terminated.
[ 0033] When water remains flowing out of the checking-supplementary-grouting holes, the grouting for the checking-supplementary-grouting holes is completed, subsequently, a second round of checking-supplementary-grouting holes are constructed in the intervals between constructed grouting drill holes 2, in this way, until no water flows out of the checking supplementary-grouting holes, an effective curtain 3 of grouting is formed, and an expected effect of grouting is formed.
[0034] 5. After the pre-grouting treatment at the lower-section of the shaft is completed, a filling treatment is performed on the annular surrounding roadway, the shaft is excavated downwards normally to penetrate the treated aquifer at the lower section. Since the aquifer is treated in advance, no water hazards accidents will be caused, and dry shafts can be basically drilled.
[ 0035] 6. The completion of the shaft construction: the shaft is excavated downwards normally to a designed depth position of the shaft, the relevant support works are completed, a connection between the bottom of the shaft and downhole roadways is established, and a construction of the shaft is completed.
[ 0036] Compared with the conventional ground grouting method, this method saves a large amount of useless drilling in the upper-section, saves the time and cost of water hazards treatments, and reduces the difficulties and risks of the control in the conventional over-loose interval of drilling. Compared with the S-hole type ground pre-grouting proposed by a process of a multi-working face parallel operation on a ground pre-grouting of a shaft in Chinese patent CN103233699A, this method saves the extension footage of the shaft and reduces the cost. Compared with the pre-grouting of the working face, the present invention does not require to terminate the excavation, that is, it does not require to terminate the shaft excavation specifically for water hazards treatments. In addition, the space of the working face in the shaft in the prior art is relative small, only one drilling equipment can be generally accommodated, and the overall drilling speed is slow, while the present invention is capable of operating a plurality of devices at the same time, saving the overall construction time of the shaft greatly.
[ 0037] It will be apparent to those skilled in the art that various changes and variants can be made in the present invention without departing from the spirit and scope of the present invention. In this way, provided that these modifications and variations of the present invention are within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. A pre-grouting treatment method for water hazards in a shaft construction, comprising following steps:
Step 1, surveying and setting out a center point of a shaft on a ground, surveying and setting out a position of a bottom of the shaft;
Step 2, analyzing geological data for the shaft to determine a zone of a lower-section of the shaft that requires a grouting treatment;
Step 3, normally constructing at an upper-section of the shaft, constructing an annular surrounding roadway (1) at the bottom of the shaft and establishing a temporary drainage system;
Step 4, treating, by pre-grouting and drilling holes (2) upward, the aquifer in the lower part of the shaft;
Step 5, performing, after the pre-grouting treatment on the lower-section of the shaft is completed, a filling treatment on the annular surrounding roadway (1), normally excavating the shaft downwards to penetrate a treated aquifer at the lower section of the shaft.
Step 6, normally excavating the shaft downwards to a designed depth position of the shaft, completing relevant support works, establishing a connection between the bottom of the shaft and downhole roadways, and completing a construction of the shaft.
2. The pre-grouting treatment method for the water hazards in the shaft construction according to claim 1, wherein in Step 3, connecting roadway are constructed at the bottom of the shaft and the annular surrounding roadway (1) is constructed around the bottom of the shaft through original downhole roadways.
3. The pre-grouting treatment method for the water hazards in the shaft construction according to claim 2, wherein in Step 3, the annular surrounding roadway (1) is 6 m to 8 m away from an outer wall of the shaft with a height of 4 m and a width of 3 m, is capable of accommodating an underground tunnel drilling rig for operation.
4. The pre-grouting treatment method for the water hazards in the shaft construction according to claim 3, wherein in Step 4, a plurality of equispaced grouting drill holes (2) are arranged vertically upward by taking the annular surrounding roadway (1) constructed around the shaft as a drilling field, depths of the grouting drill holes (2) reach an uppermost aquifer, and grouting operations are performed through the grouting drill holes (2).
5. The pre-grouting treatment method for the water hazards in the shaft construction according to claim 4, wherein in Step 4, a construction method of the grouting drill holes (2) is: uniformly constructing the plurality of grouting drill holes (2), and then complementally constructing checking-supplementary-grouting holes in intervals between adjacent grouting drill holes (2);
indicating, when no water flows out of the checking-supplementary-grouting holes, that an expected grouting effect is reached, and then terminating the grouting; and
when water remains flowing out of the checking-supplementary-grouting holes, the grouting for the checking-supplementary-grouting holes, subsequently, constructing a second round of checking-supplementary-grouting holes in the intervals between the constructed grouting drill holes (2), processing in this way until no water flows out of the checking-supplementary grouting holes, forming an effective curtain (3) of the grouting, and achieving an expected effect of the grouting.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210178346.5A CN114635697B (en) | 2022-02-25 | 2022-02-25 | Pre-grouting treatment method for water damage of shaft well construction |
| CN202210178346.5 | 2022-02-25 | ||
| PCT/CN2023/076732 WO2023160471A1 (en) | 2022-02-25 | 2023-02-17 | Pre-grouting treatment method for water hazards in shaft construction |
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| Publication Number | Publication Date |
|---|---|
| AU2023226534A1 true AU2023226534A1 (en) | 2024-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2023226534A Pending AU2023226534A1 (en) | 2022-02-25 | 2023-02-17 | Pre-grouting treatment method for water hazards in shaft construction |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN114635697B (en) |
| AU (1) | AU2023226534A1 (en) |
| WO (1) | WO2023160471A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320303A (en) * | 2021-12-09 | 2022-04-12 | 中国铁建大桥工程局集团有限公司 | Method for excavating vertical shaft flood discharge tunnel body support |
| CN114635697B (en) * | 2022-02-25 | 2023-01-24 | 中国矿业大学 | Pre-grouting treatment method for water damage of shaft well construction |
| CN115030727B (en) * | 2022-06-20 | 2023-04-07 | 长沙矿山研究院有限责任公司 | Method for treating harm of local water spraying in well shaft with installed equipment |
| CN115324592A (en) * | 2022-07-26 | 2022-11-11 | 陕西延长石油矿业有限责任公司 | Dynamic monitoring and dynamic response control method for aquifer for well construction |
| CN117780354B (en) * | 2024-02-28 | 2024-05-14 | 安徽建筑大学 | Method for reinforcing bottom of shaft of coal mine vertical shaft to be built by thick loose layer thin bedrock by sparse-filling |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4458945A (en) * | 1981-10-01 | 1984-07-10 | Ayler Maynard F | Oil recovery mining method and apparatus |
| US5842518A (en) * | 1997-10-14 | 1998-12-01 | Soybel; Joshua Richard | Method for drilling a well in unconsolidated and/or abnormally pressured formations |
| CN102518470B (en) * | 2011-12-27 | 2014-07-09 | 陕西彬长矿业集团有限公司 | Method for preventing and controlling water by using freezing pipes in annular water intercepting tunnel |
| CN105134125B (en) * | 2015-08-26 | 2018-09-11 | 北京中煤矿山工程有限公司 | Annular space bottom end construction technology for plugging after gas vertical wall |
| CN105545330A (en) * | 2016-02-26 | 2016-05-04 | 河北钢铁集团矿业有限公司 | Water prevention and control process in construction of metallurgical underground mining ore pass fragmenting system |
| CN109026010B (en) * | 2018-08-13 | 2019-10-01 | 中煤能源研究院有限责任公司 | A kind of mine seepage well slip casting type sinking shaft construction method |
| CN109854249A (en) * | 2019-03-04 | 2019-06-07 | 中煤第五建设有限公司 | It is a kind of for extra deep shaft formation pre processing around the lane Jing Huan method |
| CN111365002B (en) * | 2020-03-30 | 2021-07-30 | 北京中煤矿山工程有限公司 | Ground pre-grouting method for small-section high wellbore in complex stratum |
| CN112746849B (en) * | 2020-12-11 | 2022-02-18 | 中国矿业大学 | Shaft water-carrying digging and building method |
| CN114635697B (en) * | 2022-02-25 | 2023-01-24 | 中国矿业大学 | Pre-grouting treatment method for water damage of shaft well construction |
-
2022
- 2022-02-25 CN CN202210178346.5A patent/CN114635697B/en active Active
-
2023
- 2023-02-17 AU AU2023226534A patent/AU2023226534A1/en active Pending
- 2023-02-17 WO PCT/CN2023/076732 patent/WO2023160471A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023160471A1 (en) | 2023-08-31 |
| CN114635697B (en) | 2023-01-24 |
| CN114635697A (en) | 2022-06-17 |
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