CN107954668B - A kind of inorganic compounding injecting paste material for the advanced pre-reinforcement of Coal Face Passing Through Fault - Google Patents
A kind of inorganic compounding injecting paste material for the advanced pre-reinforcement of Coal Face Passing Through Fault Download PDFInfo
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- CN107954668B CN107954668B CN201711097970.8A CN201711097970A CN107954668B CN 107954668 B CN107954668 B CN 107954668B CN 201711097970 A CN201711097970 A CN 201711097970A CN 107954668 B CN107954668 B CN 107954668B
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- 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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous 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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of inorganic compounding injecting paste materials for the advanced pre-reinforcement of Coal Face Passing Through Fault.It is uniformly mixed at normal temperature by base-material, flyash and chopped carbon fiber and is obtained, or be uniformly mixed at normal temperature by base-material, portland cement, flyash and chopped carbon fiber and obtained.In use, water and inorganic compounding injecting paste material 0.3~0.4:1 in mass ratio are mixed evenly to get inorganic compounding injection slurry；The presetting period of inorganic compounding injection slurry is greater than 5h, and 28d uniaxial compressive strength is not less than 45MPa, and flexural strength is not less than 7 MPa, and the more conventional PO42.5 cement injection material of Residual Compressive Strength improves 30% or more.Inorganic compounding injecting paste material of the invention mobility, curing time, adhesion strength, the feature of environmental protection, in terms of can meet long drilled holes pre-pouring grout reinforcement process requirement, can effectively improve near Faults coal rock strength, guarantee working face safely and fast pass through tomography.
Description
Technical field
The invention belongs to Grouting support technology fields, and in particular to a kind of underground fault zone fractured coal and rock pre-reinforcement
Inorganic compounding injecting paste material.
Background technique
Tomography is that earth's crust stress is broken, and along plane of fracture two sides, the construction of significant relative displacement occurs for sillar.Tomography
Scales etc., big person's across pitch extend up to thousands of kms, can cut through the earth's crust, the title being usually made of many tomographies downwards
For fracture belt.
In coal mining production process, biggish tomography generally just takes workaround in the design phase, subtracts as far as possible
Influence of the craven fault to production.But for relatively small tomography (within general drop 5m), to avoid " workaround " from bringing
Coal resources significant wastage and destruction to continuous production, working face can be forced through small tomography.Working face at present
Passing fault mainly takes the passive mode of float in advance vehicle or brake, with it is shortest it is broken top or broken bottom back production distance catch upper disk or
The top plate of lower wall takes bracket to drop the techniques such as fast drawing, immediate support top plate less or after tomography exposure at the exposure of tomography
It carries out wall rock grouting and carrys out consolidating crack.It encounters larger drop tomography and takes above-mentioned construction technology, often will cause working face wall
Wall caving, top plate emit leakage, and Roof is at high cost, and safety is poor, not can guarantee the propulsion of working face continuity, have seriously affected work
Face per unit area yield.
The many mine geology complicated conditions in China, fault tectonic is more, and each mine that produces is influenced by tomography in various degree, work
Making the quick passing fault technology in face is the significant technology issues for restricting mine safety production and benefit.It is taken off according to face up and down trough
The fault parameter and orientation of dew carry out first advance Deep-hole Pre-grouting, in advance reinforcing coal before the advance of the face to tomography
Rock stratum maintains the integrality of country rock and improves bearing capacity, normally produces during being guarantee raising Coal Face Passing Through Fault important
It is great to guarantee that the safe and efficient production of working face has to leakage cash during passing fault, roof fall, the accidents such as frame of falling are prevented for technical measures
Meaning.
Current mining injecting paste material series has inorganic series (including single liquid cement slurry class, cement-sodium silicate class and water glass
Glass class) and organic series (including quality plasmoid humor, polyurethanes slurries, Lauxite plasmoid humor etc.).The inorganic general choosing of series
It is main material with cement, it is from a wealth of sources, price is low, grouting process and equipment are simple, but the Seed harvest formed is directed to fault zone
Rock improvement low strength, field-hardened effect is unobvious, and there are security risks；Organic series are mainly chemical material, can be infused
Property it is good, fastening strength is high, but haves the defects that gel time is short, price is high, the feature of environmental protection is poor, be not suitable for remote slip casting,
And for the engineering big for Coal Face Passing Through Fault this plasmoid humor demand, engineering cost is prohibitively expensive.
Domestic common research of the slip casting in terms of grouting parameter is more deep, at grouting theory, laboratory test and scene
Using all comparative maturities, current Shallow hole grouting problem is preferably resolved, but is infused in advance at a distance in Coal Face Passing Through Fault superdeep holes
Slurry aspect lacks corresponding research (preferred, grouting process design including injecting paste material etc.), largely limits common note
Application of the pulp material in slip casting field.
Summary of the invention
For above-mentioned existing common inorganic injecting paste material set strength is low and curing time is short, organic injecting paste material is at high cost
With the problem of feature of environmental protection difference, the present invention provides a kind of inorganic compounding injecting paste material for the advanced pre-reinforcement of Coal Face Passing Through Fault.
A kind of inorganic compounding injecting paste material for the advanced pre-reinforcement of Coal Face Passing Through Fault is by base-material, flyash and chopped carbon
Fiber is uniformly mixed obtained siccative at normal temperature, and the siccative is inorganic compounding injecting paste material；Wherein: the matter of base-material and flyash
Amount is than being 2~4.5:1, and base-material and flyash are component A, the mass ratio of chopped carbon fiber and component A is 0.0007~
0.0013:1；
In use, water and siccative 0.3~0.4:1 in mass ratio are mixed evenly to get inorganic compounding injection slurry；
The technical characteristic parameter of the inorganic compounding injection slurry is as follows:
Presetting period is greater than 5h；28d uniaxial compressive strength is not less than 45MPa, and flexural strength is not less than 6MPa；Remaining resistance to compression
The more conventional PO42.5 cement injection material of intensity improves 30% or more.
A kind of inorganic compounding injecting paste material for the advanced pre-reinforcement of Coal Face Passing Through Fault is by base-material, portland cement, powder
Coal ash and chopped carbon fiber are uniformly mixed obtained siccative at normal temperature, and the siccative is inorganic compounding injecting paste material；Wherein: base
The mass values range of material, portland cement and flyash is 3:1:1~8:1:1, and base-material, portland cement and flyash are
Component A, chopped carbon fiber additive amount and component A mass ratio are 0.0007~0.0013:1；
In use, water and siccative 0.3~0.4:1 in mass ratio are mixed evenly to get inorganic compounding injection slurry；
The technical characteristic parameter of the inorganic compounding injection slurry is as follows:
Presetting period is greater than 5h；28d uniaxial compressive strength is not less than 45MPa, and flexural strength is not less than 6MPa；Remaining resistance to compression
The more conventional PO42.5 cement injection material of intensity improves 30% or more.
The technical solution further limited is as follows:
The base-material is by 0.4~0.9 part of ordinary portland cement, 0.01~0.1 part of wollastonite powder, sulphate aluminium cement 0.01
~0.1 part, 0.01~0.1 part of slag powders, 0.005~0.01 part of water-reducing agent, 0.005~0.01 part of plastic expansion agent be uniformly mixed
It is made.
The portland cement strength grade is not less than 42.5, and initial set is not less than 45min, and final set is not more than 390min, than
Surface area is not less than 300m2/kg；
4~6mm of length of the chopped carbon fiber, 7 μm of filament diameter, intensity 4900 MPa, modulus 240GPa, elongation percentage
Not less than 2.1%；
0.4~0.6%, 45 μm of square hole screen over-sizes of the second class powered coal ash water content are not more than 25%.
In use, adding water while stirring into the siccative, continuous stirring 15~20 minutes is connected, i.e. acquisition inorganic compounding is infused
Slurries.
Compared with prior art, the beneficial effects of the present invention are embodied in following aspect:
1. inorganic compounding injecting paste material of the invention is in mobility, curing time, adhesion strength, the feature of environmental protection, safety etc.
Aspect can meet long drilled holes pre-pouring grout reinforcement process requirement, can effectively improve near Faults coal rock strength, guarantee working face
Safely and fast pass through tomography.
2. inorganic compounding injecting paste material of the invention is nontoxic, tasteless, pollution-free, non-corrosive, fire-retardant.
It is that the 30% of ordinary cement grout material amount of water is left 3. inorganic compounding injecting paste material stirring water requirement of the invention is few
The right side and for 24 hours bleeding rate are 0, and engineer application economy is strong.
4. inorganic compounding injecting paste material of the invention does not generate high temperature in solidification process, slip casting is safe and reliable.
5. inorganic compounding injecting paste material 28d uniaxial compressive strength of the invention is not less than 45MPa, flexural strength is not less than 7
MPa；The more conventional PO42.5 cement injection material of Residual Compressive Strength improves 30% or more；The caking property of inorganic reinforcing material and coal body
It is good, it solves the wall caving occurred during coal mining, roof fall phenomenon, keeps production more safe and reliable.
6. presetting period of inorganic compounding injecting paste material of the invention is long to be greater than > 5h, good fluidity, permeability be strong；Big pressure
Achievable remote (> 150m) Deep-hole Pre-grouting, realizes the advance reinforcement to crushed zone or tomography under the conditions of power, big flow.
7. inorganic compounding injecting paste material of the invention is gone into the well in ground mixing pack, finished product, Site is directly applied, behaviour
Make simple, easily popularization.
Detailed description of the invention
Fig. 1 is the wet feeding 28d uniaxial compressive strength stress-of the inorganic compounding injecting paste material briquette marking condition obtained of embodiment 1
Strain curve；
Fig. 2 is that anti-reckon the actual amount after a discount of the wet feeding 28d of inorganic compounding injecting paste material briquette marking condition obtained of embodiment 1 tests displacement-load
Curve；
Fig. 3 is the wet feeding 28d uniaxial compressive strength stress-of the inorganic compounding injecting paste material briquette marking condition obtained of embodiment 2
Strain curve；
Fig. 4 is that anti-reckon the actual amount after a discount of the wet feeding 28d of inorganic compounding injecting paste material briquette marking condition obtained of embodiment 2 tests displacement-load
Curve.
Specific embodiment
With reference to the accompanying drawing, the present invention is further described by embodiment.
Following embodiments are raw materials used and technical parameter is as follows:
Portland cement is PO42.5 portland cement: Chaohu conch cement Co., Ltd (strength grade 42.5,
Fineness requirement tails over for 80 μm of square hole screens must not exceed 10%, and the presetting period is no earlier than 45min, and final setting time is earlier than 10h)；
Wollastonite powder: Changxing Chen Ming Chemical Co., Ltd. (dioxide-containing silica 49%, moisture content≤0.3%, partial size D97 (μ
M)≤10, thermal expansion coefficient 6.5*10-6)；
Slag powders: (content of grade S95, the inorganic matters such as calcium activated, silicon, aluminium are greater than for Hebei Yan Xi mineral products processing factory
30%)；
Water-reducing agent: (5 ~ 35 DEG C of construction temperature, additive amount is generally the 1.0 of cementitious material for Jinan mountain and sea Chemical Co., Ltd.
~ 1.5%, mixing time is not less than 5min)；
Plastic expansion agent: (ash content 0.11%, (50 μm of sieve pore) fineness tail over for Guangzhou Wei Pu chemical analysis Technology Co., Ltd.
Object 0.16%, purity 98%, 3h free wxpansion degree 0.08%, for 24 hours free wxpansion degree 0.12%)；
Sulphate aluminium cement: (relative density is in 2.87 ~ 2.92 g/cm for Lingshou County Yuan Tong Mineral Products Trade Co., Ltd3It
Between, 30 ~ 50min of presetting period, 40 ~ 90min of final setting time, the low < 15% of overall porosity)；
PO52.5 portland cement: (strength grade 52.5, initial set is not less than for Chaohu conch cement Co., Ltd
45min, final set are not more than 390min, and portland cement specific surface area is not less than 300m2/ kg)；
Second class powered coal ash: (water content 0.5% or so, 45 μm of square hole screen over-sizes are not more than for Lingshou County perseverance stone ore product processing factory
25%)；
Chopped carbon fiber: Yancheng Feng Yang special fibre Machinery Co., Ltd. (4 ~ 6mm of length, 7 μm of filament diameter, intensity
4900 MPa, modulus 240GPa, elongation percentage 2.1%).
Embodiment 1
Prepare inorganic compounding injecting paste material specific steps are as follows:
1) under room temperature, dry base-material 1600g, flyash 400g and chopped carbon fiber 2g, base-material: fine coal are weighed respectively
Ash: chopped carbon fiber=4:1:0.005；Base-material is by 1200 g of PO42.5 portland cement, 128 g of wollastonite powder, aluminium sulfate water
128 g of mud, 120 g of slag powders, 11.2 g of water-reducing agent and 12.8 g of plastic expansion agent, which are uniformly mixed, to be made, PO42.5 silicate cement
Mud: wollastonite powder: sulphate aluminium cement: slag powders: water-reducing agent: plastic expansion agent==75:8:8:7.5:0.7:0.8.
2) weighed each raw material is successively poured into stirring container, is stirred evenly.
3) water 630g is weighed by ratio of mud 0.315:1, is slowly added to above-mentioned stirring container, while waterside is added to stir；After adding
Continue that 15min is sufficiently stirred, obtains inorganic compounding injection slurry.
4) according to GB/T 17671-1999 Test method for strength of hydraulic cement mortar (ISO method) and GB/T 50107-2010 coagulation
The slurries stirred evenly are poured into two groups of crush test molds (every group of three test blocks) and two by native ruggedness test evaluation criteria respectively
The anti-folding experiment mould (every group of three test blocks) of group, (temperature is 3 °C of 20 scholar, relative humidity 60-80%) carries out at the standard conditions
Maintenance.
5) after die-filling maintenance 7d, by one group of resistance to compression and one group of anti-folding mold demoulding, can obtain resistance to compression (7.07 × 7.07 ×
7.07cm square) and the anti-standard specimen for rolling over (4 × 4 × 16cm) strength test.On pressure experiment machine to standard specimen into
The anti-folding of row 7d and compression strength detection.
6) after die-filling maintenance 28d, by second group of resistance to compression and second group of anti-folding mold demoulding, resistance to compression (7.07 × 7.07 can be obtained
× 7.07cm square) and the anti-standard specimen for rolling over (4 × 4 × 16cm) strength test.To standard specimen on pressure experiment machine
Carry out the anti-folding of 28d and compression strength detection.
After tested, reference block presetting period 5.5h made from the inorganic compounding injecting paste material of the present embodiment；It marks wet under condition
It supports 7d and 28d uniaxial compressive strength mean value and is divided into 42MPa and 58MPa, see Fig. 1, residual strength 20MPa or so；Mark wet under condition support
7d and 28d flexural strength mean value is respectively 4.08MPa and 7.84MPa, sees Fig. 2.
Embodiment 2
Prepare inorganic compounding injecting paste material specific steps are as follows:
1) under room temperature, dry base-material 1500g, flyash 500g and chopped carbon fiber 2g, base-material: fine coal are weighed respectively
Ash: chopped carbon fiber=3:1:0.004；Base-material is by 1125 g of PO42.5 portland cement, 120 g of wollastonite powder, aluminium sulfate water
120 g of mud, 112.5 g of slag powders, 10.5 g of water-reducing agent and 12.0 g of plastic expansion agent, which are uniformly mixed, to be made, PO42.5 silicate
Cement: wollastonite powder: sulphate aluminium cement: slag powders: water-reducing agent: plastic expansion agent==75:8:8:7.5:0.7:0.8.
2) weighed each raw material is successively poured into stirring container, is stirred evenly.
3) water 620g is weighed by ratio of mud 0.31:1, is slowly added to above-mentioned stirring container, while waterside is added to stir；It adds subsequent
It is continuous that 15min is sufficiently stirred, obtain inorganic compounding injection slurry.
4) according to GB/T 17671-1999 Test method for strength of hydraulic cement mortar (ISO method) and GB/T 50107-2010 coagulation
The slurries stirred evenly are poured into two groups of crush test molds (every group of three test blocks) and two by native ruggedness test evaluation criteria respectively
The anti-folding experiment mould (every group of three test blocks) of group, (temperature is 3 °C of 20 scholar, relative humidity 60-80%) carries out at the standard conditions
Maintenance.
5) after die-filling maintenance 7d, by one group of resistance to compression and one group of anti-folding mold demoulding, can obtain resistance to compression (7.07 × 7.07 ×
7.07cm square) and the anti-standard specimen for rolling over (4 × 4 × 16cm) strength test.On pressure experiment machine to standard specimen into
The anti-folding of row 7d and compression strength detection.
6) after die-filling maintenance 28d, by second group of resistance to compression and second group of anti-folding mold demoulding, resistance to compression (7.07 × 7.07 can be obtained
× 7.07cm square) and the anti-standard specimen for rolling over (4 × 4 × 16cm) strength test.To standard specimen on pressure experiment machine
Carry out the anti-folding of 28d and compression strength detection.
After tested, reference block made from the inorganic compounding injecting paste material of the present embodiment, presetting period 5.5h；It marks wet under condition
It supports 7d and 28d uniaxial compressive strength mean value and is divided into 34MPa and 54MPa, residual strength 20MPa or so；Mark wet feeding 7d and 28d under condition
Flexural strength mean value is respectively 5.08MPa and 6.67MPa.
Embodiment 3
Prepare inorganic compounding injecting paste material specific steps are as follows:
1) under room temperature, dry base-material 1400g, PO52.5 cement 300g, flyash 300g and chopped carbon fiber are weighed respectively
Tie up 2g, base-material: PO52.5 cement: flyash: chopped carbon fiber=7:1.5:1.5:0.01；Base-material is by PO42.5 portland cement
1050 g, 112 g of wollastonite powder, sulphate aluminium cement 112g, 11.2 g of 105 g of slag powders, water-reducing agent 9.8g and plastic expansion agent
It is uniformly mixed and is made, PO42.5 portland cement: wollastonite powder: sulphate aluminium cement: slag powders: water-reducing agent: plastic expansion agent==
75:8:8:7.5:0.7:0.8。
2) weighed each raw material is successively poured into stirring container, is stirred evenly.
3) water 620g is weighed by ratio of mud 0.31:1, is slowly added to above-mentioned stirring container, while waterside is added to stir；It adds subsequent
It is continuous that 15min is sufficiently stirred, obtain inorganic compounding injection slurry.
4) according to GB/T 17671-1999 Test method for strength of hydraulic cement mortar (ISO method) and GB/T 50107-2010 coagulation
The slurries stirred evenly are poured into two groups of crush test molds (every group of three test blocks) and two by native ruggedness test evaluation criteria respectively
The anti-folding experiment mould (every group of three test blocks) of group, (temperature is 3 °C of 20 scholar, relative humidity 60-80%) carries out at the standard conditions
Maintenance.
5) after die-filling maintenance 7d, by one group of resistance to compression and one group of anti-folding mold demoulding, can obtain resistance to compression (7.07 × 7.07 ×
7.07cm square) and the anti-standard specimen for rolling over (4 × 4 × 16cm) strength test.On pressure experiment machine to standard specimen into
The anti-folding of row 7d and compression strength detection.
6) after die-filling maintenance 28d, by second group of resistance to compression and second group of anti-folding mold demoulding, resistance to compression (7.07 × 7.07 can be obtained
× 7.07cm square) and the anti-standard specimen for rolling over (4 × 4 × 16cm) strength test.To standard specimen on pressure experiment machine
Carry out the anti-folding of 28d and compression strength detection.
After tested, reference block made from the inorganic compounding injecting paste material of the present embodiment, presetting period 5.5h are marked wet under condition
Supporting 7d and 28d uniaxial compressive strength mean value is respectively 36MPa and 51MPa, sees Fig. 3, residual strength 20MPa or so；It marks wet under condition
Supporting 7d and 28d flexural strength mean value is respectively 3.71MPa and 6.51MPa, sees Fig. 4.
Embodiment 4
Prepare inorganic compounding injecting paste material specific steps are as follows:
1) under room temperature, dry base-material 1200g, PO52.5 cement 400g, flyash 400g and chopped carbon fiber are weighed respectively
Tie up 2g, base-material: PO52.5 cement: flyash: chopped carbon fiber=3:1:1:0.005；Base-material is by PO42.5 portland cement 900
G, 96 g of wollastonite powder, sulphate aluminium cement 96g, 90 g of slag powders, water-reducing agent 8.4g and 9.6 g of plastic expansion agent are uniformly mixed system
, PO42.5 portland cement: wollastonite powder: sulphate aluminium cement: slag powders: water-reducing agent: plastic expansion agent==75:8:8:7.5:
0.7:0.8。
2) weighed each raw material is successively poured into stirring container, is stirred evenly.
3) water 630g is weighed by ratio of mud 0.315:1, is slowly added to above-mentioned stirring container, while waterside is added to stir；After adding
Continue that 15min is sufficiently stirred, obtains inorganic compounding injection slurry.
4) according to GB/T 17671-1999 Test method for strength of hydraulic cement mortar (ISO method) and GB/T 50107-2010 coagulation
The slurries stirred evenly are poured into two groups of crush test molds (every group of three test blocks) and two by native ruggedness test evaluation criteria respectively
The anti-folding experiment mould (every group of three test blocks) of group, (temperature is 3 °C of 20 scholar, relative humidity 60-80%) carries out at the standard conditions
Maintenance.
5) after die-filling maintenance 7d, by one group of resistance to compression and one group of anti-folding mold demoulding, can obtain resistance to compression (7.07 × 7.07 ×
7.07cm square) and the anti-standard specimen for rolling over (4 × 4 × 16cm) strength test.On pressure experiment machine to standard specimen into
The anti-folding of row 7d and compression strength detection.
6) after die-filling maintenance 28d, by second group of resistance to compression and second group of anti-folding mold demoulding, resistance to compression (7.07 × 7.07 can be obtained
× 7.07cm square) and the anti-standard specimen for rolling over (4 × 4 × 16cm) strength test.To standard specimen on pressure experiment machine
Carry out the anti-folding of 28d and compression strength detection.
After tested, reference block made from the inorganic compounding injecting paste material of the present embodiment, presetting period 5.5h；It marks wet under condition
Supporting 7d and 28d uniaxial compressive strength mean value is respectively 39MPa and 48MPa, residual strength 20MPa or so；Mark condition under wet feeding 7d and
28d flexural strength mean value is respectively 4.89MPa and 6.2MPa.
Above embodiments are not intended to limit the invention, done within the spirit and principles of the present invention any to repair
Change, equivalent replacement and improvement etc., should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of inorganic compounding injecting paste material for the advanced pre-reinforcement of Coal Face Passing Through Fault, it is characterised in that: by base-material, fine coal
Ash and chopped carbon fiber are uniformly mixed obtained siccative at normal temperature, and the siccative is inorganic compounding injecting paste material；Wherein: base-material with
The mass ratio of flyash is 2~4.5:1, and base-material and flyash are component A, and the mass ratio of chopped carbon fiber and component A is
0.0007~0.0013:1；
The base-material by 0.4~0.9 part of ordinary portland cement, 0.01~0.1 part of wollastonite powder, sulphate aluminium cement 0.01~
0.1 part, 0.01~0.1 part of slag powders, 0.005~0.01 part of water-reducing agent, 0.005~0.01 part of plastic expansion agent uniformly mixed system
At；
The ordinary portland cement strength grade is not less than 42.5, and initial set is not less than 45min, and final set is not more than 390min, than
Surface area is not less than 300m2/kg；
4 ~ 6mm of length of the chopped carbon fiber, 7 μm of filament diameter, intensity 4900 MPa, modulus 240GPa, elongation percentage is not small
In 2.1%；
0.4~0.6%, 45 μm of square hole screen over-sizes of the flyash water content are not more than 25%；
In use, water and siccative 0.3~0.4:1 in mass ratio are mixed evenly, add water in Xiang Suoshu siccative while stirring, even
Continuous stirring 15~20 minutes to get inorganic compounding injection slurry；
The technical characteristic parameter of the inorganic compounding injection slurry is as follows:
Presetting period is greater than 5h；28d uniaxial compressive strength is not less than 45MPa, and flexural strength is not less than 7 MPa；Remaining pressure resistance
It spends more conventional PO42.5 cement injection material and improves 30% or more.
2. a kind of inorganic compounding injecting paste material for the advanced pre-reinforcement of Coal Face Passing Through Fault, it is characterised in that: by base-material, silicic acid
Salt cement, flyash and chopped carbon fiber are uniformly mixed obtained siccative at normal temperature, and the siccative is inorganic compounding injecting paste material；
Wherein: the mass values range of base-material, portland cement and flyash be 3:1:1~8:1:1, and base-material, portland cement and
Flyash is component A, and chopped carbon fiber additive amount and component A mass ratio are 0.0007~0.0013:1；
The base-material by 0.4~0.9 part of ordinary portland cement, 0.01~0.1 part of wollastonite powder, sulphate aluminium cement 0.01~
0.1 part, 0.01~0.1 part of slag powders, 0.005~0.01 part of water-reducing agent, 0.005~0.01 part of plastic expansion agent uniformly mixed system
At；
The ordinary portland cement strength grade is not less than 42.5, and initial set is not less than 45min, and final set is not more than 390min, than
Surface area is not less than 300m2/kg；
4 ~ 6mm of length of the chopped carbon fiber, 7 μm of filament diameter, intensity 4900 MPa, modulus 240GPa, elongation percentage is not small
In 2.1%；
0.4~0.6%, 45 μm of square hole screen over-sizes of the flyash water content are not more than 25%；
In use, water and siccative 0.3~0.4:1 in mass ratio are mixed evenly, add water in Xiang Suoshu siccative while stirring, even
Continuous stirring 15~20 minutes to get inorganic compounding injection slurry；
The technical characteristic parameter of the inorganic compounding injection slurry is as follows:
Presetting period is greater than 5h；28d uniaxial compressive strength is not less than 45MPa, and flexural strength is not less than 6MPa；Residual Compressive Strength
More conventional PO42.5 cement injection material improves 30% or more.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711097970.8A CN107954668B (en) | 2017-11-09 | 2017-11-09 | A kind of inorganic compounding injecting paste material for the advanced pre-reinforcement of Coal Face Passing Through Fault |
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|---|---|---|---|
| CN201711097970.8A CN107954668B (en) | 2017-11-09 | 2017-11-09 | A kind of inorganic compounding injecting paste material for the advanced pre-reinforcement of Coal Face Passing Through Fault |
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| CN110818368A (en) * | 2019-10-24 | 2020-02-21 | 山西澳华工矿山支护科技有限公司 | Super-strong mineral inorganic reinforcing material with good permeability and preparation method thereof |
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| CN111810197B (en) * | 2019-08-27 | 2022-04-08 | 淮南矿业(集团)有限责任公司 | Pre-grouting reinforcement method for fault structural zone of working face |
| CN112343605B (en) * | 2020-11-05 | 2022-09-27 | 西南科技大学 | Rock burst prevention tunnel excavation supporting method based on reduced-scale modified pressure arch |
| CN114180895A (en) * | 2021-10-18 | 2022-03-15 | 安徽华耀科力工程科技有限公司 | Production process of inorganic composite grouting material |
| CN115108790A (en) * | 2022-06-06 | 2022-09-27 | 安徽华耀科力工程科技有限公司 | Mineral inorganic filling reinforcing material and preparation method thereof |
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