CN106703884A - Cooling method for thermal insulating layer on wall surface of high-temperature hard rock roadway of deep well - Google Patents
Cooling method for thermal insulating layer on wall surface of high-temperature hard rock roadway of deep well Download PDFInfo
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- CN106703884A CN106703884A CN201710024447.6A CN201710024447A CN106703884A CN 106703884 A CN106703884 A CN 106703884A CN 201710024447 A CN201710024447 A CN 201710024447A CN 106703884 A CN106703884 A CN 106703884A
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- 239000011435 rock Substances 0.000 title claims abstract description 42
- 238000001816 cooling Methods 0.000 title abstract description 12
- 239000004567 concrete Substances 0.000 claims abstract description 55
- 238000009413 insulation Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000011381 foam concrete Substances 0.000 claims abstract description 10
- 230000008093 supporting effect Effects 0.000 claims abstract description 9
- 238000009412 basement excavation Methods 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims description 9
- 239000006260 foam Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000004088 foaming agent Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005507 spraying Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 abstract 12
- 230000003111 delayed effect Effects 0.000 abstract 1
- 239000011229 interlayer Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 238000005065 mining Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a cooling method for a thermal insulating layer on the wall surface of a high-temperature hard rock roadway of a deep well. The cooling method includes firstly spraying a foam concrete layer (2) with thermal insulation property onto the surface of a surrounding rock (3) after roadway excavation of the surrounding rock and taking the foam concrete layer (2) as a thermal insulation interlayer, then spraying a concrete layer (1) onto the surface of the foam concrete layer (2) after the foam concrete layer is set initially, and taking the concrete layer (1) as an external supporting layer. The foam concrete layer (2) utilizes the characteristic that the foam concrete material has the tiny, impendent, and uniformly distributed airtight pore structures which have a volume proportion of 20-30%, and has a thermal conduction coefficient of less than 0.3W/(m*K), so that heat emitted from the heat source surrounding rock (3) to the roadway (4) can be effectively delayed, and the working environment of the high-temperature hard rock roadway is greatly improved. In addition, the terminal insulating layer and an outer supporting layer reach the support strength requirement of 20MPa, and meanwhile the supporting cost is reduced by more than 10%. The cooling method for the thermal insulating layer on the wall surface of the high-temperature hard rock roadway of the deep well provided by the invention is wide in source, convenient to operate, relative low in cost, significant in thermal insulating effect, and accordant with roadway operation procedure.
Description
Technical field
The present invention relates to a kind of cool-down method of metal mine deep tunnel, more particularly to a kind of deep-well hard rock high temperature lane
Road wall thermal insulation layer cool-down method.
Background technology
As China's metal mine exploitation is progressively to 1000~1500 meters of depth developments, High Temperature in Deep Mine evil problem is increasingly
Highlight.According to《Mine safety code》Regulation, the air themperature in underground work place must not exceed 28 DEG C, but portion big absolutely
Divide deep mining mine laneway setting temperature more than 30 DEG C, or even close to 40 DEG C, this is to mine safety exploitation and operation people
The health of member causes grave danger.By the analysis and research to Heat sources in the pit, Heat sources in the pit mainly includes that country rock heat release, hot water are put
Heat, underground equipment heat release, oxidation heat liberation and personnel's heat release, wherein, country rock temperature has exceeded when adopting as deep as to more than 1000 meters
40 DEG C, country rock heat release occupies proportion and is up to more than 50%, is the No.1 thermal source of Deep Shaft Mine in China heat evil.At present, Temperature Deep is tackled
Mode mainly have：1st, on-mechanical refrigeration modes, including strengthen force ventilation, individual protection etc.；2nd, mechanical refrigeration mode, including
Underground central refrigerating system, local refrigeration machine etc..The equal Shortcomings of above technology：1st, by strengthening force ventilation, can only be in wind
Play cooling effect in the place that stream can be sent to.Although the settings such as only head digging laneway can by booster air feed,
But it is serious that local high wind easily causes operating environment dust pollution.In addition, deep mining air feed circuit is more long, cold wind stream is vulnerable to
The influence of the factors such as rock heat, has changed into hot blast, it is impossible to play cooling effect at arrival wind place.2nd, current
Body guard technology can not still meet to be promoted under conditions of economy.In addition, the method easily managed ability and work
The influence of quality, it is difficult to reach ideal effect.Although the 3, mechanical refrigeration mode can realize subsurface environment refrigeration purpose, set
Standby capital and energy consumption are high, allow bargh to hang back.Meanwhile, the complicated adverse circumstances of mine down-hole easily cause equipment damage
It is bad.
The content of the invention
The technical problems to be solved by the invention are to propose that a kind of easy to operate, cost is relatively low, effect of heat insulation is obvious, meet
The deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method of tunnel work flow.
In order to solve the above-mentioned technical problem, the deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method that the present invention is provided,
After country rock roadway excavation, first spraying one layer on the surface of country rock has the bubble concrete layer of thermal insulation properties as heat insulation clamps
Layer, treats to spray layer concrete layer conduct in described foam concrete layer surface again after described bubble concrete layer initial set
Outer branch sheath.
The component of described bubble concrete layer mixes according to weight portion：20~30 parts of foaming agent, 10~20 parts of foam stabilizer,
350~400 parts of cement, thick middle 700~1000 parts of mixed sand, coarse aggregate 700~1000 part of the particle diameter less than 15mm, water 140~
180 parts, 40~100 parts of accelerator.
The component of described concrete layer mixes according to weight portion：350~400 parts of cement, thick middle mixed sand 700~1000
Part, coarse aggregate 700~1000 part of the particle diameter less than 15mm, 140~180 parts of water, 40~100 parts of accelerator.
The coefficient of heat conduction of described bubble concrete layer is less than 0.3W/ (mK), plays isolation Source, and common
The concrete layer coefficient of heat conduction is in 2W/ (mK) left and right.
Described bubble concrete layer is formed to have and accounts for small independent, the equally distributed closed gas of volume ratio 20~30%
Pore structure, light weight is high-strength while support cost reduction by more than 10%.
Described bubble concrete layer and the composite axial compression intensity of described concrete layer are not less than 20MPa.
Described bubble concrete layer is according to 3~4cm of vault, 5~7cm of abutment wall constructions；Treat described bubble concrete layer
After initial set, described concrete layer whitewashing is carried out immediately, described concrete layer is according to 3~4cm of vault, 5~7cm of abutment wall constructions
Form outer branch sheath.
Using the deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method of above-mentioned technical proposal, keypoint treatment causes deep-well
The topmost country rock heat release of heat evil, proposes to change former concrete spraying supporting pattern.After country rock roadway excavation, foam is first carried out
Concrete spraying, forming one layer has the bubble concrete layer of thermal insulation properties as thermal insulation layer, and it is closed that the thermal insulation layer has
Air hole structure, effectively delays country rock heat release, reaches the effect of cooling down in tunnel；Then normal concrete whitewashing is carried out again,
Formation concrete layer is outer branch sheath, ensures Drift stability.Meanwhile, the concrete layer of low temperature can also absorb heat in tunnel
Amount, plays the function of improving tunnel thermal environment.Bubble concrete layer and concrete layer can absorb tunnel internal heat, play cooling
Effect.
The beneficial effects of the present invention are：The bubble concrete layer coefficient of heat conduction with airtight air vent structure is less than
0.3W/(m·K)；The shield heat away that effectively can be given out the country rock of high temperature is in bubble concrete layer；Low temperature it is mixed
Solidifying soil layer can absorb heat in tunnel as outer branch sheath, improve operating environment in tunnel.The deep-well hard rock high temperature wall
Face thermal insulation layer cool-down method is synchronous with tunnel gunite, and flow is simple, it is ensured that efficiency of construction；Foam concrete high-strength light,
More than 20Mpa is reached with concrete combined supporting intensity；Loose structure can cost-effective more than 10%.
In sum, the present invention is a kind of wide material sources, easy to operate, cost is relatively low, effect of heat insulation is obvious, meet tunnel
The deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method of work flow.
Brief description of the drawings
Fig. 1 is deep-well hard rock high temperature tunnel wall insulating layer structure schematic diagram.
Fig. 2 is wall shield heat away schematic diagram of the present invention.
Specific embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that preferred reality described herein
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Referring to the deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method that Fig. 1 and Fig. 2, the present invention are provided, implementation steps
Including：
After country rock roadway excavation, first one layer of bubble concrete layer 2 with thermal insulation properties is sprayed on the surface of country rock 3
Used as insulating sandwich, bubble concrete layer 2 forms a kind of with a large amount of closed according to 3~4cm of vault, 5~7cm of abutment wall constructions
The insulating sandwich of air hole structure, the thermal source that can effectively completely cut off country rock 3 distributes heat 5 to tunnel.The group of bubble concrete layer 2
Divide and mix according to weight portion：20~30 parts of foaming agent, 10~20 parts of foam stabilizer, 350~400 parts of cement, thick middle mixed sand 700~
1000 parts, coarse aggregate 700~1000 part of the particle diameter less than 15mm, 140~180 parts of water, 40~100 parts of accelerator.Treat that foam is mixed
After the solidifying initial set of soil layer 2, the whitewashing of concrete layer 1 is carried out immediately, according to 3~4cm of vault, abutment wall 5~7cm constructions are in foam
Layer concrete layer 1 is sprayed as outer branch sheath in the surface of concrete layer 2, and concrete layer 1 is playing the surrounding rock supporting effect of tunnel 4
Simultaneously, it is also possible to absorb heat 5 in tunnel to a certain extent, heat evil problem is alleviated.The component of concrete layer 1 is according to weight portion
Mixing：350~400 parts of cement, thick middle 700~1000 parts of mixed sand, coarse aggregate 700~1000 part of the particle diameter less than 15mm, water
140~180 parts, 40~100 parts of accelerator.
The coefficient of heat conduction of bubble concrete layer 2 is less than 0.3W/ (mK), plays isolation Source.
Bubble concrete layer 2 is formed to have and accounts for small independent, the equally distributed airtight air vent knot of volume ratio 20~30%
Structure, light weight is high-strength while support cost reduction by more than 10%.
The composite axial compression intensity of bubble concrete layer 2 and concrete layer 1 is not less than 20MPa.
Referring to Fig. 1, construction aspect increases foams mix device on the basis of original concrete sprayer, is sprayed in first time
By foam storage bin and blender UNICOM during slurry, foam concrete whitewashing is carried out；After completion, connecting valve is closed, carried out general
Logical concrete spraying, construction technology is simple and convenient.
Referring to Fig. 2, effectively the heat 5 of country rock 3 can be completely cut off in lane by the excellent heat-proof quality of bubble concrete layer 2
Outside road.Meanwhile, concrete supporting 1 can absorb the heat 5 of part tunnel 4, reduce temperature in tunnel, improve operation ring in tunnel
Border.
Deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method provided by the present invention, roadway support is combined with cooling
Get up, increase cooling function in normal roadway support flow so that tunnel wall is effective while supporting intensity is met
Ground isolation country rock 3 cooling heat source, with wide material sources, easy to operate, cost is relatively low, effect of heat insulation is obvious the characteristics of.
The present invention lowers the temperature for mine laneway, and the especially Deep Shaft Mine in China tunnel cooling of more than well depth 1000m provides one kind
Economic, feasible method；For research deep mining, improve heavy duty service environment tool and be of great significance.
Explanation embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the technology of this area
For personnel, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc. should be included in
Within protection scope of the present invention.
Claims (7)
1. a kind of deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method, it is characterized in that：After country rock roadway excavation, first enclosing
The surface of rock (3) sprays one layer has the bubble concrete layer (2) of thermal insulation properties as insulating sandwich, treats that described foam is mixed
Layer concrete layer (1) is sprayed as outer supporting on described bubble concrete layer (2) surface again after solidifying soil layer (2) initial set
Layer.
2. deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method according to claim 1, it is characterized in that：Described bubble
The component of foam concrete layer (2) mixes according to weight portion：20~30 parts of foaming agent, 10~20 parts of foam stabilizer, cement 350~400
Part, thick middle 700~1000 parts of mixed sand, coarse aggregate 700~1000 part of the particle diameter less than 15mm, 140~180 parts of water, accelerator
40~100 parts.
3. deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method according to claim 1 and 2, it is characterized in that：It is described
Concrete layer (1) component according to weight portion mix：350~400 parts of cement, thick middle 700~1000 parts of mixed sand, particle diameter is small
In 700~1000 parts of the coarse aggregate of 15mm, 140~180 parts of water, 40~100 parts of accelerator.
4. deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method according to claim 1 and 2, it is characterized in that：It is described
Bubble concrete layer (2) the coefficient of heat conduction be less than 0.3W/ (mK), rise isolation Source.
5. deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method according to claim 1 and 2, it is characterized in that：It is described
Bubble concrete layer (2) formed have account for small independent, the equally distributed airtight air vent structure of volume ratio 20~30%, matter
It is light high-strength while support cost reduction by more than 10%.
6. deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method according to claim 1 and 2, it is characterized in that：It is described
Bubble concrete layer (2) and the composite axial compression intensity of described concrete layer (1) be not less than 20MPa.
7. deep-well hard rock high temperature tunnel wall thermal insulation layer cool-down method according to claim 1 and 2, it is characterized in that：It is described
Bubble concrete layer (2) according to 3~4cm of vault, 5~7cm of abutment wall constructions；After described bubble concrete layer (2) is pre-hardening,
Described concrete layer (1) whitewashing is carried out immediately, and described concrete layer (1) is according to 3~4cm of vault, 5~7cm of abutment wall constructions
Form outer branch sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710024447.6A CN106703884A (en) | 2017-01-13 | 2017-01-13 | Cooling method for thermal insulating layer on wall surface of high-temperature hard rock roadway of deep well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710024447.6A CN106703884A (en) | 2017-01-13 | 2017-01-13 | Cooling method for thermal insulating layer on wall surface of high-temperature hard rock roadway of deep well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106703884A true CN106703884A (en) | 2017-05-24 |
Family
ID=58907461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710024447.6A Pending CN106703884A (en) | 2017-01-13 | 2017-01-13 | Cooling method for thermal insulating layer on wall surface of high-temperature hard rock roadway of deep well |
Country Status (1)
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| CN (1) | CN106703884A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593939A (en) * | 2019-09-30 | 2019-12-20 | 安徽理工大学 | Heat-damage mine coal face roadway heat-insulation and temperature-reduction system and method |
| CN110863846A (en) * | 2019-11-25 | 2020-03-06 | 山东科技大学 | Heat insulation device for mine roadway and construction method thereof |
| CN112194416A (en) * | 2020-09-25 | 2021-01-08 | 辽宁工程技术大学 | Novel roadway sprayed concrete heat insulation layer and application method thereof |
| CN112664228A (en) * | 2020-12-28 | 2021-04-16 | 辽宁工程技术大学 | Composite supporting structure for heat resistance of deep rock mass engineering and construction method |
| WO2021103192A1 (en) * | 2019-11-29 | 2021-06-03 | 山东科技大学 | Supporting structure for preventing roadway surrounding rock from transferring heat |
| CN114673523A (en) * | 2022-02-25 | 2022-06-28 | 中国矿业大学 | Foam carbon heat insulation device for outer surface of coal roadway and construction process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110593939A (en) * | 2019-09-30 | 2019-12-20 | 安徽理工大学 | Heat-damage mine coal face roadway heat-insulation and temperature-reduction system and method |
| CN110863846A (en) * | 2019-11-25 | 2020-03-06 | 山东科技大学 | Heat insulation device for mine roadway and construction method thereof |
| WO2021103192A1 (en) * | 2019-11-29 | 2021-06-03 | 山东科技大学 | Supporting structure for preventing roadway surrounding rock from transferring heat |
| CN112194416A (en) * | 2020-09-25 | 2021-01-08 | 辽宁工程技术大学 | Novel roadway sprayed concrete heat insulation layer and application method thereof |
| CN112664228A (en) * | 2020-12-28 | 2021-04-16 | 辽宁工程技术大学 | Composite supporting structure for heat resistance of deep rock mass engineering and construction method |
| CN114673523A (en) * | 2022-02-25 | 2022-06-28 | 中国矿业大学 | Foam carbon heat insulation device for outer surface of coal roadway and construction process |
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