CN1644877A - Method for preventing well wall from crack by dynamic earth layer reinjecting water - Google Patents
Method for preventing well wall from crack by dynamic earth layer reinjecting water Download PDFInfo
- Publication number
- CN1644877A CN1644877A CN 200510038145 CN200510038145A CN1644877A CN 1644877 A CN1644877 A CN 1644877A CN 200510038145 CN200510038145 CN 200510038145 CN 200510038145 A CN200510038145 A CN 200510038145A CN 1644877 A CN1644877 A CN 1644877A
- Authority
- CN
- China
- Prior art keywords
- water
- water injection
- borehole wall
- aquifer
- injection well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002347 injection Methods 0.000 claims description 36
- 239000007924 injection Substances 0.000 claims description 36
- 230000004888 barrier function Effects 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000011835 investigation Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 4
- 239000003245 coal Substances 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 abstract 2
- 238000013461 design Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A method for dynamically injecting water back into stratum and preventing the cracking of shaft wall features that the water injecting well is arranged on the ground for injecting the water back into the water bearing stratum to restore its water pressure and decrease the vertical force acting on shaft wall, so preventing the cracking and deformation caused by mining. Said water may be the underground water discharged by mining coal.
Description
Technical field
The present invention relates to the method for preventing well wall from crack by dynamic earth layer reinjecting water, be particularly useful for the improvement and the prevention of shaft of vertical well in the mine construction engineering, prevent and treat in the deep topsoil because recovery activity causes breaking of the borehole wall.
Background technology
In recent years, the vertical shaft borehole wall disaster of breaking has taken place in the thick alluvium in East China in succession, and serious threat is normally carried out to mine work.For many years, by working energetically of domestic relevant research institution, the research of shaft of vertical well shaft wall fracture reason and preventing and controlling has been obtained certain achievement.For preventing that the vertical borehole wall from breaking, adoptable technology path has: 1. " resist ", promptly by improving the intensity of shaft cladding, strengthen thickness of shaft wall and strengthen borehole wall supporting capacity, bear the acting in conjunction of level and Vertical Load; 2. " allow ", change shaft wall structure it vertically can be contracted, sink to changing to adapt to soil layer; 3. " subtract ", filling is carried out in the aquifer reinforced, reduce so that the elimination soil layer compresses, thereby reduce vertical additional force, reach the purpose of sidewall safety.According to this technology path, commonplace and the ripe method that adopts is that borehole wall broken grouting, surface grout injection are reinforced aquifer etc. at present, but find according to actual improvement situation, though the above-mentioned way decrement that the aquifer produces in recovery activity in grouting curtain significantly reduces, but the soil layer that grouting curtain is outer has still produced very big vertical additional force because the aquifer dehydration also sedimentation can take place to the borehole wall.So cure the symptoms, not the disease, still there is hidden danger in mining activity.
Summary of the invention
Goal of the invention: in view of the problem of prior art existence, the method that the purpose of this invention is to provide a kind of preventing well wall from crack by dynamic earth layer reinjecting water, by to aquifer re-injection water, the borehole wall is produced retroactive addition power, reduce the suffered vertical additional force of the borehole wall with this, guarantee that the borehole wall is stressed in the scope of design of safety, guarantee the high and stable yields of underground work safety and mine.
Technical scheme: the technical solution adopted for the present invention to solve the technical problems is: mine is carried out site investigation, draw main white-out water layer distribution situation, around pitshaft, arrange a water injection well at least, the water injection well drilling direction is consistent with mine borehole wall direction, drilling depth passes thick alluvium, water barrier, enter crucial aquifer, then with water as media, carry out water filling from ground in the face of the aquifer, reduce and the hydraulic pressure that recovers the aquifer falls with this, the vertical additional force that the reduction even the elimination borehole wall are subjected to, guarantee that the borehole wall is stressed in the Safety Design scope, the injecting process cooperates borehole wall additional strain monitoring system to carry out simultaneously, changes as the standard of dynamically adjusting water injection well pressure and water injection rate with additional strain.The number of water injection well and arrangement, total water injection rate, apart from the distance and the water injection well degree of depth of pit shaft, according to damaged situation of pit shaft geology, water level geology and engineering reality and the borehole wall and borehole wall additional force size are determined that initial fill pressure falls definite according to the aquifer actual hydraulic pressure.
Beneficial effect: the method for preventing well wall from crack by dynamic earth layer reinjecting water of the present invention, when the borehole wall produces distortion or destroys under the vertical additional force effect before, arrange water injection well on ground, re-injection water is carried out in crucial aquifer, reduce the aquifer water pressure drop to the hydraulic pressure that recovers the aquifer, vertical additional force is dropped to minimum to the influence of the borehole wall, solved because the shaft wall fracture problem that exploitation causes.Respond well through physical test, soil layer is carried out hydrophobic and water filling Simulation result show, hydrophobicly cause soil body compression, pit shaft is subjected to the effect of vertical additional force, and sedimentation takes place; After the water filling, soil deformation partly recovers, and the suffered additional force minimizing of pit shaft, even eliminates the ordinary production that can protect mine.Can utilize the water of discharging in the coal mining activity to carry out re-injection during construction, belong to " green " job practices, polluted underground water not, cost is low, and bright development prospect is arranged, and has practicality widely.
Description of drawings
Fig. 1 is that the dynamic re-injection well in stratum of the present invention is arranged schematic diagram.
Fig. 2 is a stratum of the present invention dynamic re-injection well schematic top plan view.
Among the figure: the 5-water barrier 6-borehole wall 7-pit shaft of 1-water injection well 2-thick alluvium 3-water barrier 4-aquifer
The specific embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
The method of preventing well wall from crack by dynamic earth layer reinjecting water of the present invention, at first pit shaft 7 is carried out site investigation, drawing the master stratum distribution situation is followed successively by: thick alluvium 2, water barrier 3, aquifer 4, rock water barrier 5, after the damaged situation of the borehole wall and borehole wall additional force analyzed, design total water injection rate, number and mode that water injection well 1 is arranged, the degree of depth that water injection well 1 creeps into apart from the distance and the water injection well 1 of pit shaft 7, initial fill doctor power is fallen definite according to the actual hydraulic pressure in aquifer 4, it is because the aquifer water pressure differential that exploitation causes can adopt pore water pressure sensor to measure that actual hydraulic pressure falls.Adopt borehole wall additional strain monitoring system instrument in the injecting process, monitor simultaneously, change as the standard of dynamically adjusting each water injection well pressure and water injection rate with additional strain.This monitoring system mainly is made up of strain transducer, communication cable, data collecting instrument, and measured additional strain is a relative value, and promptly a period of time is a primary condition behind the sensor to imbed, and the strain of surveying later on deducts this initial value, obtains additional strain.Sensor is embedded in the borehole wall 6 by design, additional strain is undergone mutation when the somewhere, illustrate that this place is subjected to subsidiary stress excessive, may cause the stressed scope of design that surpasses of the borehole wall, cause shaft wall fracture, adopt the method for re-injection water so, eliminate the subsidiary stress of this part increase, guarantee that pit shaft is stressed in the Safety Design scope.Shown in the accompanying drawing: determine four water injection wells 1 need be set around pitshaft 7, be all around and arrange, water injection well 1 is about 3 times of wellbore radius apart from the distance of pit shaft 7, water injection well 1 drilling direction is consistent with the mine borehole wall 6 directions, drilling depth passes thick alluvium 2, water barrier 3, enter crucial aquifer 4, the degree of depth is about 120 meters, the aquifer is for 4 times a water barrier 5, water barrier is the rock stratum 5 times, supporting water injection equipment and strain monitoring system are set on ground, re-injection water is carried out in aquifer 4, total water injection rate falls definite according to aquifer 4 actual hydraulic pressures, reduce the aquifer water pressure drop by water filling, recover the hydraulic pressure in aquifer, the vertical additional force that the reduction even the elimination borehole wall are subjected to, thus guarantee that the borehole wall is stressed in the Safety Design scope.
Claims (2)
1. the method for preventing well wall from crack by dynamic earth layer reinjecting water, it is characterized in that: mine is carried out site investigation, draw main white-out water layer distribution situation, at least arrange a water injection well (1) on every side at pit shaft (7), water injection well (1) drilling direction is consistent with the borehole wall (6) direction, drilling depth passes thick alluvium (2), water barrier (3), enter crucial aquifer (4), then with water as media, carry out re-injection from ground in the face of aquifer (4), cooperate borehole wall additional strain monitoring system to carry out simultaneously in the injecting process, change as the standard of dynamically adjusting water injection well pressure and water injection rate with additional strain.
2. the method for preventing well wall from crack by dynamic earth layer reinjecting water according to claim 1, it is characterized in that: the number of water injection well (1) and arrangement, total water injection rate, definite apart from the distance and the water injection well degree of depth of pit shaft (7), according to damaged situation of pit shaft geology, water level geology and engineering reality and the borehole wall and borehole wall additional force size are determined that initial fill pressure falls definite according to aquifer (4) actual hydraulic pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100381451A CN100412315C (en) | 2005-01-17 | 2005-01-17 | Method for preventing well wall from crack by dynamic earth layer reinjecting water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100381451A CN100412315C (en) | 2005-01-17 | 2005-01-17 | Method for preventing well wall from crack by dynamic earth layer reinjecting water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1644877A true CN1644877A (en) | 2005-07-27 |
| CN100412315C CN100412315C (en) | 2008-08-20 |
Family
ID=34876218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100381451A Expired - Fee Related CN100412315C (en) | 2005-01-17 | 2005-01-17 | Method for preventing well wall from crack by dynamic earth layer reinjecting water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100412315C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985881A (en) * | 2010-09-30 | 2011-03-16 | 兖州煤业股份有限公司 | Method for preventing vertical shaft wellhole from being damaged |
| CN103352700A (en) * | 2013-08-07 | 2013-10-16 | 兖州煤业股份有限公司 | Method for preventing shaft from cracking in alleviation water-bearing layer by utilizing automatic supply water loss method |
| CN115012946A (en) * | 2022-06-20 | 2022-09-06 | 中国矿业大学 | Construction method for preventing and treating well wall breakage through graded excavation and filling and waterproof structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1013132B (en) * | 1989-12-26 | 1991-07-10 | 中国统配煤矿总公司基建局 | Post grouting process for water bearing sand strata behind the wall |
| CN100359131C (en) * | 2004-03-22 | 2008-01-02 | 中国矿业大学 | Constrained inner wall treatment and method of preventing well wall from broken |
-
2005
- 2005-01-17 CN CNB2005100381451A patent/CN100412315C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985881A (en) * | 2010-09-30 | 2011-03-16 | 兖州煤业股份有限公司 | Method for preventing vertical shaft wellhole from being damaged |
| CN101985881B (en) * | 2010-09-30 | 2013-05-22 | 兖州煤业股份有限公司 | Method for preventing vertical shaft wellhole from being damaged |
| CN103352700A (en) * | 2013-08-07 | 2013-10-16 | 兖州煤业股份有限公司 | Method for preventing shaft from cracking in alleviation water-bearing layer by utilizing automatic supply water loss method |
| CN115012946A (en) * | 2022-06-20 | 2022-09-06 | 中国矿业大学 | Construction method for preventing and treating well wall breakage through graded excavation and filling and waterproof structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100412315C (en) | 2008-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhang et al. | Enhancement of gas drainage efficiency in a special thick coal seam through hydraulic flushing | |
| CN102797465B (en) | Underground ultra-thin virtual protection layer hydraulic coal mining method | |
| CN104763432B (en) | A kind of method that high stress tunnel country rock release controls large deformation | |
| CN101403314B (en) | Coal mine down-hole drilling hydraulic fracturing anti-reflection mash gas extraction technique | |
| CN104314610A (en) | Outburst eliminating method for coal roadway stripe region | |
| CN102080518A (en) | Method for extracting gas from coal seam roof complex branched well | |
| CN107816365A (en) | A kind of quick-fried pumping integration anti-burst method of coal seam drilling | |
| CN106555607A (en) | A kind of old goaf grouting filling control earth's surface residual settlement method | |
| CN105134219A (en) | Construction technology for freezing shaft lining in soft rock layer | |
| CN111764960B (en) | Coal mining separation layer water damage prevention and control method | |
| CN100412315C (en) | Method for preventing well wall from crack by dynamic earth layer reinjecting water | |
| CN106194185B (en) | The lower thick aqueous soil layer sand control coal and rock pillar for safety of hydraulic pressure effect stays equipment, method | |
| Cheng et al. | Principle and engineering application of pressure relief gas drainage in low permeability outburst coal seam | |
| CN117113715A (en) | Design method for preventing and controlling rock burst of mining area by filling coal-based solid wastes | |
| CN106049413A (en) | Hybrid power drainage consolidation system applied to deep saturated soft soil foundation and construction method | |
| CN115126505B (en) | Method for accurately improving stability of overlying strata structure | |
| Xu et al. | Test on water-level stabilization and prevention of mine-shaft failure by means of groundwater injection | |
| CN114658485B (en) | Composite disaster treatment method for water damage and rock burst of thick and hard sandstone roof of coal mine | |
| CN217681857U (en) | Water pressing device for monitoring deformation of coal bed roof rock stratum | |
| Zhou et al. | Geological barrier–a natural rock stratum for preventing confined karst water from flowing into mines in North China | |
| Moh et al. | Preconsolidation of soft Bangkok clay by non-displacement sand drains and surcharge | |
| CN115573762A (en) | Method and equipment for preventing and controlling coal rock dynamic disasters through high-pressure pulsating water injection | |
| Liu et al. | Prevention of mine-shaft failure by aquifer replenishment | |
| CN112664259A (en) | Trinity comprehensive outburst prevention method for high outburst coal seam | |
| Yan et al. | The uplift mechanism of the rock masses around the Jiangya dam after reservoir inundation, China |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080820 Termination date: 20170117 |