CN105422170A - Grouting reinforcement treatment method for mid-depth goaf below building foundation - Google Patents
Grouting reinforcement treatment method for mid-depth goaf below building foundation Download PDFInfo
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- CN105422170A CN105422170A CN201510738353.6A CN201510738353A CN105422170A CN 105422170 A CN105422170 A CN 105422170A CN 201510738353 A CN201510738353 A CN 201510738353A CN 105422170 A CN105422170 A CN 105422170A
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000002787 reinforcement Effects 0.000 title abstract description 4
- 239000011435 rock Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 238000010276 construction Methods 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 12
- 239000003245 coal Substances 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 238000004364 calculation method Methods 0.000 claims abstract description 5
- 238000007569 slipcasting Methods 0.000 claims description 39
- 239000002002 slurry Substances 0.000 claims description 15
- 238000013461 design Methods 0.000 claims description 13
- 238000005065 mining Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000004570 mortar (masonry) Substances 0.000 claims description 7
- 230000035699 permeability Effects 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000000151 deposition Methods 0.000 claims description 5
- 238000007596 consolidation process Methods 0.000 claims description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 230000032798 delamination Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 238000009533 lab test Methods 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract 4
- 238000001514 detection method Methods 0.000 abstract 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 238000011835 investigation Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 235000012773 waffles Nutrition 0.000 description 1
Classifications
-
- 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
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention provides a grouting reinforcement treatment method for a mid-depth goaf below a building foundation. The method mainly includes the steps that the grouting boundary range is determined through calculation, the grouting drilling depth is determined through a water injection test, grouting drilling, a grouting pump, a grouting rod and a hole packer are involved, the grouting boundary range is determined through theoretical calculation and the water injection test, grouting parameters and the grouting process are designed, and grouting reinforcement effect quality detection and settlement monitoring are conducted. The building foundation treatment method suitable for the coal mine goaf is provided. The method is characterized in that the grouting range is determined through theoretical calculation by looking up exploration and geographical data; the grouting drilling depth is determined through the water injection test; the corresponding grouting parameters are designed, grouting equipment is selected, and the grouting process is determined; drilling coring is conducted after one month after grouting construction, and grouting quality detection and surface deformation monitoring are conducted. The method has the beneficial effects that the damaged rock stratum and loosened rock of the coal mine goaf on the lower portion of a building are reinforced, residual displacement and deformation of overlaying rock on the upper portion of the goaf are effectively controlled, and normal use of the building is guaranteed.
Description
Technical field
The invention belongs to a kind of method that Mine Geological Disasters is administered, be applicable to have coal mine gob to need reinforcement process more than 30m buried depth under building lot.
Background technology
After underground mineral resources is exploited, the Mined-out Area control method formed is mainly contained to filling method, stays and establish ore pillar supporting methods, roof caving method etc.In order to energy fully Resource recovery, it is many that filling method processes in the exploitation of valuable or rare metal mineral products resource that goaf uses, but the higher filling cost of strength of filling mass is corresponding higher, even if employing cut and fill is valuable or rare metal mineral products resource, the country rock of obturation still has deformation failure; Stay in goaf and establish ore pillar roof supporting rock mass damage, but along with exploitation disturbance, underground water or Mineral rheology, the intensity of ore pillar can reduce, and even destroys; It is commonplace that roof caving method processes goaf in coal mining, namely after exploitation of coal resources, roof strata is caving, formed " three bands ": caving zone, fissure zone and warp damage, rock stratum and surface movement is caused under the many factors combined influences such as hydrologic condition, geological conditions, exploitation disturbance, landform, road is caused to ftracture, a series of geotechnical engineering problems such as house collapse.
At present two aspects are mainly contained to Mined-out Area control: be adopt lasting exploit theoretical direction to produce on the one hand, namely in mining Design and generative process, goaf is processed, but due to the reason such as understanding, environmental concept of cost of winning, lasting exploit theory, this theory can not effectively be promoted.That heavy process is subtracted to local goaf grouting on the other hand, namely grouting and reinforcing is carried out on the part goaf affecting engineering foundation basis, as patent (application number: 2015101306536) disclose a kind of goaf slurry processes construction technology, patent (application number: 2015103374519) disclose the quick filling system in a kind of goaf; Patent (application number: the grouting process 2015103369690) disclosing the quick filling system in a kind of goaf; Patent (application number: 2011102394042) disclose goaf slip casting treatment method of road; Patent (application number: the preparation method 2010101381426) disclosing slurry for grouting and sand feeding of mined-out region under highway.
These patented technologies all cause geotechnical engineering problems to propose various solution to goaf at the technology and equipment of goaf grouting, but the strata movement that goaf is caused and Overburden Rock Failure have himself rule, these strata movement rules should be utilized to goaf grouting, improve separation in reducing subsidence by grouting effect.
Summary of the invention
The object of the present invention is to provide a kind of building foundation treating method be applicable on coal mine gob.
For achieving the above object, technical scheme of the present invention is:
In under a kind of building foundation, dark goaf grouting reinforcing and processing method is by inlet well, grouting pump, slip casting bar, hole packer forms, by the scope of theory calculate determination slip casting border and the slip casting degree of depth, devise grouting parameter and technique, grouting consolidation effect quality examination and settlement monitoring.
Horizontal range design formulas between the outer round of slip casting and outside, basis:
L
1＝l+l
1；L
2＝l+l
2
In formula: L
1the horizontal range of ore body superficial part injected hole is arrived in outside ,-basis, m; L
2the horizontal range of Deep Orebodies injected hole is arrived in outside ,-basis, m; L-native section horizontal range of outside, basis table, m; l
1outside ,-basis rock section ore body superficial part horizontal range,
m; l
2outside ,-basis rock section Deep Orebodies horizontal range,
m; H
a-ore body superficial part buried depth, m; H
b-Deep Orebodies buried depth, m; H-show native buried depth, m;
-show native section traveling angle, get 45 °; α-ore body mean obliquity, °; γ-rock section travelling limit angle, gets 75 °.
The improvement length in goaf, thickness and to administer width etc. be as checking foundation with " building, water body, railway and main roadway coal column stay and set and mining pressed coal code ".
Slip casting depth calculation formula:
H+ (H
rock-H
split-H
emit)≤H
note≤ h+ (H
rock-H
emit)
In formula: h-table soil thickness, m; H
rock-rock stratum gross thickness, m; H
split-fissure zone height, m; H
emit-caving zone height, m; Wherein, fissure zone height and caving zone height calculate according to " mining engineering design manual " and determine.
Water injection test uses grouting pump, grouting pipeline and the hole packer formula Grouting Pipe subsection water injection determination inlet well degree of depth, and water injection pressure is normal pressure, judges goaf top plate fissure zone height according to the dehydrating speed of pouring water into borehole amount.
Goaf buried depth is less than the pressure controllable of 50m built in 2.0MPa, and goaf buried depth is greater than the control of 50m at 1MPa; 2. mortar depositing construction: the denseness of slurries is first rare rear thick, the method that injected hole adopts continuous grouting and interval slip casting to combine, goaf grouting adopts hole-bottom slurry-injection method and delamination pour slurry, from periphery boring to direction, building foundation successively slip casting; 3. design adopts and carries out grouting like flange grouting method; 4. injected hole spacing is 30-50m; 5. injecting paste material selects cement and fly ash material; 6. the solid body uniaxial compressive strength of designing requirement slurries is greater than 3MPa;
Packer permeability test-closedown filling system-extraction grouting plug-sealing of hole-analysis slip casting effect after range of grouting-design grouting parameter-construction injected hole-set up slip casting station-filling system withstand voltage test-bore flushing and packer permeability test-slurrying slip casting-peephole grouting process-observation terminate with reading control slip casting.
Mortar depositing construction terminates to detect grouting quality after 1 month, and boring coring and laboratory test, require that the solid body uniaxial compressive strength of slurries is greater than 3MPa; The surface deformation monitoring cycle should last till completion the previous moon latter 1 ~ 2 year from construction.
Advantageous Effects of the present invention is: (1) determines range of grouting and grouting process in conjunction with resource exploitation overlying strata motion theory; (2) slurries are filled with erecting dense individual props spoil space and overlying strata separation layer space, have prevented and treated the further sinking that resource exploitation damages stratum; (3) resistance to overturning and the non-deformability of structure foundation is improved.
The present invention is used in structure foundation consolidation process on Types Below goaf:
(1) through the highway, the railway that have goaf ground settlement; (2) building goaf can not moved; (3) by the water engineering facility that goaf affects.
Accompanying drawing explanation
Fig. 1 goaf grouting apparatus arrangement and grouting process schematic diagram.
Fig. 2 inlet well layout schematic diagram.
Fig. 3 goaf grouting effect schematic diagram.
Fig. 4 slip casting effect surface subsidence monitoring schematic diagram.
Fig. 5 Grouting Pipe schematic diagram.
In figure: hole packer 2-8a-guide peg 2-1b-inlet well 2-2b-feed pipe for mortar 2-3b-grouting tube under hole packer 2-4a-hole packer liquid injection pipe 2-5a-hole packer closed section boring 2-6a-Grouting Pipe 2-7a-on 1-grouting pump station 2-grouting pipeline 3-building lot scope 4-grouting pipeline 5-grouting pump station 6-topsoil and horizon d 7-warp damage 8-fissure zone 9-caving zone 10-seat earth rock stratum 11-grouting and reinforcing body 12-settlement monitor 13-settlement monitoring stake 2-1a-inlet well 2-2a-feed pipe for mortar 2-3a-
Detailed description of the invention
Data acquisition, and investigation: to hydrogeologic data, the resource enrichness condition in mine, the Data acquisition, of mining Design, exploitation method, production practice, Mined-out Area control mode; Field investigation underground mining situation and ground settlement survey data.
Scheme of Strengthening: goaf buried depth is less than 30m stiffening basic ground, can adopt the method such as strong rammer, digging up and filling in, pile foundation, slip casting, waffle slab; Goaf buried depth is greater than 30m stiffening basic ground and adopts grouting filling.
Range of grouting is determined: according to investigation and data collection, by the horizontal range between the outer round (2-1A, 2-2A, 2-3A, 4-1A, 4-2A, 4-3A) of theory calculate determination slip casting and outside, basis (3) and the slip casting degree of depth, preliminary reinforcing scope; When the data disappearance of collecting and investigate, then adopt water injection test determination fissure zone (8) highly.
Grouting parameter designs: goaf buried depth is less than the pressure controllable of 50m built in 2.0MPa, and goaf buried depth is greater than the control of 50m at 1MPa; Injected hole (2-1A and 2-2A, 2-1A and 2-1B) spacing is 30-50m; Injecting paste material selects cement and fly ash material, and the solid body uniaxial compressive strength of designing requirement slurries is greater than 3MPa;
Grouting construction process: the denseness of slurries is first rare rear thick, the method that injected hole (2,4) adopts continuous grouting and interval slip casting to combine, goaf grouting caving zone (9) scope adopts hole-bottom slurry-injection method or rock stratum absciss layer scope to adopt segmenting slip casting, from periphery boring (2-1A, 2-2A, 2-3A, 4-1A, 4-2A, 4-3A) to the slip casting successively of building foundation (3) direction; Hole-bottom slurry-injection method: namely at the bottom of the first patchhole of Grouting Pipe, then marginal not limit is up pulled out, until fill complete opening, can not the direct slip casting from top; Delamination pour slurry: in adopting two hole packers (2-3a, 2-7a) up and down of hole packer formula Grouting Pipe (2-6a) to hole, one section is separated by slip casting section (2-5a) to the rock stratum slip casting of mutual absciss layer, realizes fixed point slip casting.Determine that slip casting terminates according to grouting pressure change, the inflation fluid of the lower hole packer (2-3a, 2-7a) of first release, the inflation fluid of the upper hole packer (2-3a, 2-7a) of release again, by moving the rock stratum slip casting of hole packer formula Grouting Pipe (2-6a) to next section of mutual absciss layer at the bottom of hole successively to aperture; Design adopts carries out grouting like flange grouting method.
Packer permeability test-closedown filling system-extraction grouting plug-sealing of hole-analysis slip casting effect after range of grouting-design grouting parameter-construction injected hole-set up slip casting station-filling system withstand voltage test-bore flushing and packer permeability test-slurrying slip casting-peephole grouting process-observation terminate with reading control slip casting.
Slip casting effect is assessed: mortar depositing construction terminates to detect grouting quality after 1 month, and boring coring and laboratory test, require that the solid body uniaxial compressive strength of slurries is not less than 3MPa; The surface deformation monitoring cycle should last till completion the previous moon latter 1 ~ 2 year from construction.
The above; be only the specific embodiment of the present invention; but the protection domain of invention is not limited thereto; any engineers and technicians being familiar with the art are in technical scope of the present invention; some conversion can be done; as range of grouting computational methods, grouting process, injecting paste material etc., all should as infringement protection scope of the present invention.Therefore protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (1)
1. dark goaf grouting reinforcing and processing method under a building foundation, by inlet well, grouting pump, slip casting bar, hole packer forms, by the scope of theory calculate determination slip casting border and the slip casting degree of depth, devise grouting parameter and technique, grouting consolidation effect quality examination and settlement monitoring, is characterized in that:
(1) slip casting horizontal plane range computation, the horizontal range design formulas between the outer round of slip casting and outside, basis is as follows,
L
1＝l+l
1；L
2＝l+l
2
In formula: L
1the horizontal range of ore body superficial part injected hole is arrived in outside ,-basis, m; L
2the horizontal range of Deep Orebodies injected hole is arrived in outside ,-basis, m; L-native section horizontal range of outside, basis table, m; l
1outside ,-basis rock section ore body superficial part horizontal range,
m; l
2outside ,-basis rock section Deep Orebodies horizontal range,
m; H
a-ore body superficial part buried depth, m; H
b-Deep Orebodies buried depth, m; H-show native buried depth, m;
-show native section traveling angle, get 45 °; α-ore body mean obliquity, °; γ-rock section travelling limit angle, gets 75 °;
The improvement length in goaf, thickness and to administer width etc. be as checking foundation with " building, water body, railway and main roadway coal column stay and set and mining pressed coal code ";
(2) the slip casting degree of depth is determined
Theoretical calculation formula:
H+ (H
rock-H
split-H
emit)≤H
note≤ h+ (H
rock-H
emit)
In formula: h-table soil thickness, m; H
rock-rock stratum gross thickness, m; H
split-fissure zone height, m; H
emit-caving zone height, m; Wherein, fissure zone height and caving zone height calculate according to " mining engineering design manual " and determine;
Water injection test: use grouting pump, grouting pipeline and the hole packer formula Grouting Pipe subsection water injection determination inlet well degree of depth, water injection pressure is normal pressure, judges goaf top plate fissure zone height according to the dehydrating speed of pouring water into borehole amount;
(3) grouting parameter grouting pressure: goaf buried depth is less than the pressure controllable of 50m built in 2.0MPa, goaf buried depth is greater than the control of 50m at 1MPa; 2. mortar depositing construction: the denseness of slurries is first rare rear thick, the method that injected hole adopts continuous grouting and interval slip casting to combine, goaf grouting adopts hole-bottom slurry-injection method and delamination pour slurry, from periphery boring to direction, building foundation successively slip casting; ; 3. design adopts and carries out grouting like flange grouting method; 4. injected hole spacing is 30-50m; 5. injecting paste material selects cement and fly ash material; 6. the solid body uniaxial compressive strength of designing requirement slurries is greater than 3MPa;
(4) grouting process, determine range of grouting-design grouting parameter-construction injected hole-set up slip casting station-filling system withstand voltage test-bore flushing and packer permeability test-slurrying slip casting-peephole grouting process-observation terminate with reading control slip casting after packer permeability test-closedown filling system-extraction grouting plug-sealing of hole-analysis slip casting effect;
(5) consolidation effect and settlement monitoring, mortar depositing construction terminates to detect grouting quality after 1 month, and boring coring and laboratory test, require that the solid body uniaxial compressive strength of slurries is greater than 3MPa; The surface deformation monitoring cycle should last till completion the previous moon latter 1 ~ 2 year from construction.
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|---|---|---|---|
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|---|---|---|---|
| CN201510738353.6A CN105422170B (en) | 2015-11-02 | 2015-11-02 | Middle deep goaf grouting reinforcing and processing method under a kind of building foundation |
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| CN105422170A true CN105422170A (en) | 2016-03-23 |
| CN105422170B CN105422170B (en) | 2018-10-23 |
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| CN106555607A (en) * | 2016-12-02 | 2017-04-05 | 淮北矿业（集团）有限责任公司 | A kind of old goaf grouting filling control earth's surface residual settlement method |
| CN107503768A (en) * | 2017-08-23 | 2017-12-22 | 广西大学 | The method of the oblique Soil-nailed of Small Data Sets shallow embedding tunnel overlying ground |
| CN108104766A (en) * | 2017-12-18 | 2018-06-01 | 中国矿业大学 | Guarantor/the process for purifying water on iron content waste water injection Surface cracking stratum |
| CN108240234A (en) * | 2017-12-28 | 2018-07-03 | 辽宁工程技术大学 | A kind of Along Railway underlies coal mine gob Grouting method |
| CN108661705A (en) * | 2018-06-25 | 2018-10-16 | 山东科技大学 | Item adopts goaf quaternity comprehensive treatment construction method |
| CN108677956A (en) * | 2018-06-04 | 2018-10-19 | 山东农业大学 | Covered karst development area rock and soil layer contact surface grouting method |
| CN108708768A (en) * | 2018-06-04 | 2018-10-26 | 徐州中国矿大岩土工程新技术发展有限公司 | Slip casting tube head, grouting device and its construction method |
| CN108708723A (en) * | 2018-05-02 | 2018-10-26 | 中国矿业大学 | Alternately support subtracts heavy method without coal column filling mining for a kind of coal petrography column |
| CN108756945A (en) * | 2018-06-04 | 2018-11-06 | 徐州中国矿大岩土工程新技术发展有限公司 | The device and construction method administered for multilayer goaf grouting |
| CN108798769A (en) * | 2018-06-25 | 2018-11-13 | 山东科技大学 | Item adopts goaf integrated synthesis and administers construction method |
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| CN110307034A (en) * | 2019-04-04 | 2019-10-08 | 中国矿业大学(北京) | The strip-type grouting filling method in goaf |
| CN110439611A (en) * | 2019-09-02 | 2019-11-12 | 徐州中国矿大岩土工程新技术发展有限公司 | Fill the assembled storage slurry device and its assembly method of underwater deep confined space |
| CN111396056A (en) * | 2020-03-25 | 2020-07-10 | 长安大学 | Comprehensive treatment method for storage type inclined coal seam goaf under highway |
| CN111810196A (en) * | 2020-07-15 | 2020-10-23 | 中勘资源勘探科技股份有限公司 | Method for reinforcing broken top plate through ground grouting |
| CN112878956A (en) * | 2021-01-20 | 2021-06-01 | 天津市华普生产力促进有限公司 | Foundation construction method for municipal engineering |
| CN112878955A (en) * | 2021-01-20 | 2021-06-01 | 天津市华普生产力促进有限公司 | Foundation construction method for municipal engineering |
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|---|---|---|---|---|
| CN106555607A (en) * | 2016-12-02 | 2017-04-05 | 淮北矿业（集团）有限责任公司 | A kind of old goaf grouting filling control earth's surface residual settlement method |
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