CN106223961B - A kind of coal mine return air main entry passing fault tunneling construction method - Google Patents
A kind of coal mine return air main entry passing fault tunneling construction method Download PDFInfo
- Publication number
- CN106223961B CN106223961B CN201610615757.0A CN201610615757A CN106223961B CN 106223961 B CN106223961 B CN 106223961B CN 201610615757 A CN201610615757 A CN 201610615757A CN 106223961 B CN106223961 B CN 106223961B
- Authority
- CN
- China
- Prior art keywords
- slip casting
- rock
- return air
- drilling
- fault
- 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.)
- Active
Links
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 239000003245 coal Substances 0.000 title claims abstract description 25
- 230000005641 tunneling Effects 0.000 title claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 49
- 238000005553 drilling Methods 0.000 claims abstract description 37
- 238000007569 slipcasting Methods 0.000 claims abstract description 34
- 238000013461 design Methods 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims description 50
- 238000003325 tomography Methods 0.000 claims description 19
- 230000009977 dual effect Effects 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 235000019353 potassium silicate Nutrition 0.000 claims description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 238000002474 experimental method Methods 0.000 claims description 7
- 230000002706 hydrostatic effect Effects 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 4
- 230000002146 bilateral effect Effects 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000000151 deposition Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000009423 ventilation Methods 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 238000006911 enzymatic reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provides a kind of coal mine return air main entry passing fault tunneling construction method, includes the following steps：Step S1, driving detour, and are detoured according to original tunnelling, detour vertical with fault strike；Step S2, reserved rock emit, and calculate and design rock and emit；Step S3, slip casting carry out material selection first, then calculate grouting amount, then carry out drilling design, and then orifice tube is designed and is fixed, last slip casting；Compared with prior art, the present invention has following advantageous effect：Ensure that return air main entry passing fault passes through；It ensure that passing fault smooth construction, it is ensured that personal safety and property safety and mine ventilation system are quickly formed, it is ensured that mine safety production.
Description
Technical field
The present invention is a kind of coal mine return air main entry passing fault tunneling construction method.
Background technology
It is domestic that red celebrating beam coal mine is located at Ordos City, Inner Mongolia Autonomous Region Dalate Banner, is subordinated to that tower is so high to strangle mining area.
Designed mine capacity：6.0Mt/a；It is shown according to geologic information, 3-1 return air main entry average thickness is about 4.87m, coal seam top
Slate is mainly conglomerate and siltstone, and part is fine sandstone or kern stone, and bottom plate lithology is mainly Sandy Silt, mud
Rock, part are medium-fine sand rock, and DF14 tomographies are normal fault, and drop H=17m, 65 ° of inclination angle, balkstone is mud stone, conglomerate and portion
Divide conglomerate, bottom plate is sandstone.
Red celebrating beam coal mine return air main entry is meeting tomography in pushing up tunneling process, meets head on that roof fall occurs.Place coal seam is 3-1
Coal, nature of coal seam 2.90~6.85m of thickness, average 5.10m.2.86~6.85m of minable thickness, average 4.87m, from inbreak situation
Roof is seen as Sandy Silt, rear portion is whole enzymatic method at the fall of ground of place, and meeting tomography at roof fall enters rock gangway.At roof fall
Using anchor net and just spray supporting, drift section is rectangle in rear portion tunnel, and actual measurement tunnel width is 5.8m, high 4m.It is applied using development machine
Ribbon conveyer is arranged at work, development machine rear portion, is colloid air duct at conveyer brattice way spandrel arch.
For development machine when carrying out new cycle tunneling construction, part rock has just been tunneled in the right side portion of side that meets head on, and driving opening is
Perpendicular row strip, open rear section is a crushed zone, is thought, crushed zone is broken through under rock pressure and ponding effect
Weak location rock stratum forms infundibulate and emits top opening.It meets head on after roof fall, forms Gangue in opening, withstand funnel openings, make
It obtains roof fall not continue to magnify, spoil is based on broken cash and cobblestone.
Tomography is drilled, bore position is in return air main entry and meets head on, and apart from left side 1.1m, top plate 3.3m, 1 ° of top rade bores
The long 8.8m in hole；0-4.1m sections of drilling is coal seam, and 4.1-6.5m sections of drilling is mud stone, and 6.5-8.8m sections of drilling is packsand；It meets head on
Water yield starts as 9.5m3/ h, present water consumption are about 4m3/ h, tomography DF14, drop 17m, 60 ° of inclination angle, trend are big with return air
35 ° of lane angle.
Red celebrating beam coal mine 3-1 return air main entry penetrating grounds have the spies such as watery strong, lithology weak, geologic condition complexity
Point is shown according to the practical tomography that discloses, and is tunneled to 1227 in 3-1 return air main entrys and is encountered DF14 tomographies, and fault strike is 145 °, with
Tunnelling direction is about 17m, turn-off 2.5m at 35 ° of angles, 65 ° of inclination angle, drop.Tomography norm al discharge rate is 4m3/h.Top
Plate is broken and top plate water drenching is big, roadway construction anchor cable and anchor pole failure.In tunneling construction, meet head on right side, to form a tomography
Broken breach, breach funneling shape are crushed under the action of rock gravity and ponding pressure；Breach constantly gushes out spoil, gives
Construction brings difficulty, and driving speed is slow, and existing anchor rete cord spray supporting construction is difficult and cannot play its due supporting effect,
Larger hidden danger, construction speed is brought to cause to seriously affect to 3-1 return air main entry construction safeties, spoil is with cobblestone and mud stone
It is main.Simultaneously as 3-1 return air main entrys are responsible for entire mine 3-1 coal ventilating systems, to ensure that full mine realizes that full blast pressure is logical as early as possible
Wind system need to accelerate construction progress, and meet ventilation needs and construction safety.Mine side research determine 3-1 return air main entrys, meet head on to
North is stepped back at 29m and constructs, and 3-1 return air main entry return air detours, and is tunneled perpendicular to tomography.It is special for construction safety and property safety
This has developed a kind of coal mine return air main entry passing fault tunneling construction method.
Invention content
In view of the deficienciess of the prior art, it is an object of the present invention to provide a kind of coal mine return air main entry passing fault tunneling constructions
Method, to solve the problems mentioned in the above background technology, the present invention is easy to use, and easy to operation, stability is good, reliability
It is high.
To achieve the goals above, the present invention is to realize by the following technical solutions：A kind of coal mine return air main entry mistake
Tomography tunneling construction method, includes the following steps：
Step S1, driving detour, and are detoured according to original tunnelling, detour vertical with fault strike；
Step S2, reserved rock emit, and calculate and design rock and emit, in step s 2, according to formula
It calculates and stops the thickness that magmatic rock emits；
In formula：B is rock plug thickness；
P is final grouting pressure；
S is rock cap basal area；
λ is overload factor, and λ takes 1.1-1.2；
【τ】Allow shearing strength for rock；
L is tunnel-surrounding length；
Step S3, slip casting carry out material selection first, then calculate grouting amount, then carry out drilling design, then device to hole
Mouth pipe is designed and fixes, last slip casting, and the mode of slip casting is first single slurry then dual slurry；
In single slurry, plasticity morning injection pulp material is poured into machine,massing first, after stirring, pours into stock tank, is being noted
Under the action of stock pump, it is introduced into drilling by high pressure valve and orifice valves；
In dual slurry, cement and water are poured into machine,massing first, after stirring, stock tank is poured into, waterglass is introduced
In grouting pump, under the action of grouting pump, it is introduced into drilling by high pressure valve and orifice valves；
In slip casting, grouting pressure is 2~2.5 times of hydrostatic pressure；
Slip casting should carry out pressure water experiment, the leakproofness of testing bore holes and safety before starting, the pressure value of pressure water experiment is
1.2~1.5 times of final grouting pressure, when stablize 15min it is without exception when, you can start formal mortar depositing construction；
When grouting pressure reaches final grouting pressure value, it is tuned into 1 grade (16L/min), small flow voltage stabilizing 20min can terminate the brill
The slip casting in hole works.
Further, it in the material selection of step S3, needs to use single slurry and dual slurry, wherein single slurry is using modeling
Property morning injection pulp material；
Dual slurry is mixed using cement and waterglass, wherein：
Cement：42.5 Portland cements of P.O；
Waterglass：Modulus M=2.8~3.1,30~35 ° of Be' of concentration.
Further, in step s3, grouting amount is calculated according to grouting amount formula：
Q=A × β × η × V；
In formula：Q-slurries total injection rate (m3)；
The super diffusion consumption coefficient of A-slurries takes 1.5；
β-slurries volumetric efficiency 0.9；
η-fault belt average crack rate 10%；
The rock mass volume that V-is noted, m3；
The rock mass volume V=S × L noted；
In formula：Basal areas of the S-by note rock mass；
L-is by note rock mass length.
Further, in step s3, drilling design refers to using pore-forming mode twice, and hole termination depth is according to boreholes drilling
As a result tomography thickness is determined, horizontal drilling length is more than tomography highest distance position 5m.
Further, in step s3, orifice tube is designed and fixes：
Orifice tube uses diameter 70mm welded tubes, and single long 6m, 7 unilateral band high pressure flanges, side is threaded, remaining aperture
Pipe, is bilateral screw thread, flange side is welded with a little；
Orifice tube is fixed in two steps, and the first step is twined in orifice tube bond pad locations in numb tripping in drilling, second step slip casting
It carries out full packages to fix, the second the end of the step, solidification 8h or more carries out secondary pore-forming after bulge test.
Beneficial effects of the present invention：A kind of coal mine return air main entry passing fault tunneling construction method of the present invention, it is ensured that return
Wind main entry passing fault passes through；It ensure that passing fault smooth construction, it is ensured that personal safety and property safety and mine ventilation system
System is quickly formed, it is ensured that mine safety production.
Specific implementation mode
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to
Specific implementation mode, the present invention is further explained.
The present invention provides a kind of technical solution：A kind of coal mine return air main entry passing fault tunneling construction method, including following step
Suddenly：
Step S1, driving detour, and are detoured according to original tunnelling, detour vertical with fault strike；
Step S2, reserved rock emit, and calculate and design rock and emit, in step s 2, according to formulaCalculating stops
The thickness that magmatic rock emits；
In formula：B is rock plug thickness；
P is final grouting pressure；
S is rock cap basal area；
λ is overload factor, and λ takes 1.1-1.2；
【τ】Allow shearing strength for rock；
L is tunnel-surrounding length；
Step S3, slip casting carry out material selection first, then calculate grouting amount, then carry out drilling design, then device to hole
Mouth pipe is designed and fixes, last slip casting, and the mode of slip casting is first single slurry then dual slurry；
In single slurry, plasticity morning injection pulp material is poured into machine,massing first, after stirring, pours into stock tank, is being noted
Under the action of stock pump, it is introduced into drilling by high pressure valve and orifice valves；
In dual slurry, cement and water are poured into machine,massing first, after stirring, stock tank is poured into, waterglass is introduced
In grouting pump, under the action of grouting pump, it is introduced into drilling by high pressure valve and orifice valves；
In slip casting, grouting pressure is 2~2.5 times of hydrostatic pressure；
Slip casting should carry out pressure water experiment, the leakproofness of testing bore holes and safety before starting, the pressure value of pressure water experiment is
1.2~1.5 times of final grouting pressure, when stablize 15min it is without exception when, you can start formal mortar depositing construction；
When grouting pressure reaches final grouting pressure value, it is tuned into 1 grade (16L/min), small flow voltage stabilizing 20min can terminate the brill
The slip casting in hole works.
In the material selection of step S3, need to use single slurry and dual slurry, wherein single slurry uses plasticity morning injection
Pulp material；
Dual slurry is mixed using cement and waterglass, wherein：
Cement：42.5 Portland cements of P.O；
Waterglass：Modulus M=2.8~3.1,30~35 ° of Be' of concentration.
Further, in step s3, grouting amount is calculated according to grouting amount formula：
Q=A × β × η × V；
In formula：Q-slurries total injection rate (m3)；
The super diffusion consumption coefficient of A-slurries takes 1.5；
β-slurries volumetric efficiency 0.9；
η-fault belt average crack rate 10%；
The rock mass volume that V-is noted, m3；
The rock mass volume V=S × L noted；
In formula：Basal areas of the S-by note rock mass；
L-is by note rock mass length.
In step s3, drilling design refers to using pore-forming mode twice, and hole termination depth is determined according to boreholes drilling result
Tomography thickness, horizontal drilling length are more than tomography highest distance position 5m.
In step s3, orifice tube is designed and fixes：
Orifice tube uses diameter 70mm welded tubes, and single long 6m, 7 unilateral band high pressure flanges, side is threaded, remaining aperture
Pipe, is bilateral screw thread, flange side is welded with a little；
Orifice tube is fixed in two steps, and the first step is twined in orifice tube bond pad locations in numb tripping in drilling, second step slip casting
It carries out full packages to fix, the second the end of the step, solidification 8h or more carries out secondary pore-forming after bulge test.
Ensure that return air main entry passing fault passes through；It ensure that passing fault smooth construction, it is ensured that personal safety and property
Safety and mine ventilation system are quickly formed, it is ensured that mine safety production.
As one embodiment of the present of invention：When constructing to 3-1 return air main entrys, with specific reference to following steps：
Step S1, driving detour, and are detoured according to original tunnelling, detour vertical with fault strike.
Step S2, reserved rock emit, and calculate and design rock and emit；Thickness B=8.4 × 3.14 × 2.7 that only magmatic rock emits2×1.1/
0.5×(3.14×2.7+5.4+1.4×2)≈26m。
Step S3, slip casting carry out material selection first, then calculate grouting amount, then carry out drilling design, then device to hole
Mouth pipe is designed and fixes, last slip casting；
In the material selection of step S3, need to use single slurry and dual slurry, wherein single slurry uses plasticity morning injection
Pulp material；
Dual slurry is mixed using cement and waterglass, wherein：
Cement：42.5 Portland cements of P.O；
Waterglass：Modulus M=2.8~3.1,30~35 ° of Be' of concentration.
Further, in step s3, grouting amount is calculated according to grouting amount formula：
Q=A × β × η × V；
In formula：Q-slurries total injection rate (m3)；
The super diffusion consumption coefficient of A-slurries takes 1.5；
β-slurries volumetric efficiency 0.9；
η-fault belt average crack rate 10%；
The rock mass volume that V-is noted, m3；
The rock mass volume V=S × L noted；
In formula：Basal areas of the S-by note rock mass；
L-is by note rock mass length.
When calculating grouting amount, slip casting tunnel is Semicircular tunnel, clear height 4.1m, high width 5.4m, according to probing feelings
Condition speculates, it is contemplated that width 2.4m, drilling depth are more than crushed zone 5m, then are about 7.4m by slip casting rock mass length.Dilation angle
It is calculated by 5m.
S=π r2=3.14 × 6.72≈141m2；
The ≈ of V=S × L=141 × 7.4 1043m3；
The ≈ of Q=A × β × η × V=1.5 × 0.9 × 10% × 1043 140m3；
Single slurry, dual slurry are calculated by 80% and the 20% of total grouting amount, then single slurry is 112m3, dual slurry grouting amount
For 28m3。
In step s3, drilling design refers to using pore-forming mode twice, and drilling uses 2 pore-forming modes, opening diameter
For 75mm, hole depth 25m, whole bore dia 50mm, hole termination depth determine tomography thickness, horizontal drilling length according to boreholes drilling result
More than tomography highest distance position 5m.
In drilling, drilling is arranged in reserved rock cap and is evenly arranged with fault belt interface, drill with ferrule under the left and right sides
Hole is outward from the horizontal by 2 ° of angles, remaining drilling is outward from the horizontal by 3 ° of angles.
In step s3, orifice tube is designed and fixes：
Orifice tube uses diameter 70mm welded tubes, and single long 6m, 7 unilateral band high pressure flanges, side is threaded, remaining aperture
Pipe, is bilateral screw thread, flange side is welded with a little；
Orifice tube is fixed in two steps, and the first step is twined in orifice tube bond pad locations in numb tripping in drilling, second step slip casting
It carries out full packages to fix, the second the end of the step, solidification 8h or more carries out secondary pore-forming after bulge test.
The mode of slip casting is first single slurry then dual slurry；
In single slurry, plasticity morning injection pulp material is poured into machine,massing first, after stirring, pours into stock tank, is being noted
Under the action of stock pump, it is introduced into drilling by high pressure valve and orifice valves；
In dual slurry, cement and water are poured into machine,massing first, after stirring, stock tank is poured into, waterglass is introduced
In grouting pump, under the action of grouting pump, it is introduced into drilling by high pressure valve and orifice valves；
Grouting pressure is one of the factor for influencing slurries effect, and when grouting pressure is too small, grout mixing reduces, rock mass
Expected consolidation effect is not achieved, when grouting pressure is excessive, grout mixing expands, and slurries is caused to waste.
Grouting pressure is 2~2.5 times of hydrostatic pressure, and tunnel absolute altitude is 970m, 3-1 coal water level elevations are 1384.79~
1451.21m, hydrostatic pressure 4.2Mpa, design final grouting pressure are 8.4~10.5Mpa.
Slip casting should carry out packer permeability test before starting, and test leakproofness and the safety of system, and the pressure value of pressure water experiment is
1.2~1.5 times of final grouting pressure, i.e. 10.1~12.6Mpa, when stablize 15min it is without exception when, you can start formal slip casting and apply
Work.
When grouting pressure reaches final grouting pressure value, i.e. when 8.4~10.5Mpa, it is tuned into 1 grade (16L/min), small flow voltage stabilizing
20min can terminate the slip casting work in the hole.
By this method, by taking strong technical measures and organiztion measure to ensure that red celebrating beam coal mine 3-1 return air
The smooth construction of main entry passing fault.It detours and grouting program using in the construction of 3-1 coals, it is ensured that 3-1 return air main entry passing faults are suitable
Profit passes through；Set up U-shaped steel canopy and grouting and reinforcing scheme by taking construction return air to detour, by drift section optimization design and
The measures such as the optimization design of support form ensure that passing fault smooth construction, it is ensured that personal safety and property safety and mine are logical
Wind system is quickly formed, it is ensured that mine safety production.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill
For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from the present invention spirit or
In the case of essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes that come within the meaning and range of equivalency of the claims in the present invention
It is interior.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (5)
1. a kind of coal mine return air main entry passing fault tunneling construction method, it is characterised in that：Include the following steps：
Step S1, driving detour, and are detoured according to original tunnelling, detour vertical with fault strike；
Step S2, reserved rock emit, and calculate and design rock and emit, in step s 2, according to formulaOnly magmatic rock is calculated to emit
Thickness；
In formula：B is rock plug thickness；
P is final grouting pressure；
S is rock cap basal area；
λ is overload factor, and λ takes 1.1-1.2；
【τ】Allow shearing strength for rock；
L is tunnel-surrounding length；
Step S3, slip casting carry out material selection first, then calculate grouting amount, drilling design are then carried out, then to orifice tube
It is designed and fixes, the mode of last slip casting, slip casting is first single slurry then dual slurry；
In single slurry, plasticity morning injection pulp material is poured into machine,massing first, after stirring, stock tank is poured into, in grouting pump
Under the action of, it is introduced into drilling by high pressure valve and orifice valves；
In dual slurry, cement and water are poured into machine,massing first, after stirring, pour into stock tank, waterglass is introduced into slip casting
In pump, under the action of grouting pump, it is introduced into drilling by high pressure valve and orifice valves；
In slip casting, grouting pressure is 2~2.5 times of hydrostatic pressure；
Slip casting should carry out pressure water experiment, the leakproofness of testing bore holes and safety before starting, the pressure value of pressure water experiment is slip casting
1.2~1.5 times of final pressure, when stablize 15min it is without exception when, you can start formal mortar depositing construction；
When grouting pressure reaches final grouting pressure value, it is tuned into 1 grade (16L/min), small flow voltage stabilizing 20min can terminate the drilling
Slip casting works.
2. a kind of coal mine return air main entry passing fault tunneling construction method according to claim 1, it is characterised in that：In step
In the material selection of S3, need to use single slurry and dual slurry, wherein single slurry uses plasticity morning injection pulp material；
Dual slurry is mixed using cement and waterglass, wherein：
Cement：42.5 Portland cements of P.O；
Waterglass：Modulus M=2.8~3.1,30~35 ° of Be' of concentration.
3. a kind of coal mine return air main entry passing fault tunneling construction method according to claim 1, it is characterised in that：In step
In S3, grouting amount is calculated according to grouting amount formula：
Q=A × β × η × V；
In formula：Q-slurries total injection rate (m3)；
The super diffusion consumption coefficient of A-slurries takes 1.5；
β-slurries volumetric efficiency 0.9；
η-fault belt average crack rate 10%；
The rock mass volume that V-is noted, m3；
The rock mass volume V=S × L noted；
In formula：Basal areas of the S-by note rock mass；
L-is by note rock mass length.
4. a kind of coal mine return air main entry passing fault tunneling construction method according to claim 1, it is characterised in that：In step
In S3, drilling design refers to using pore-forming mode twice, and hole termination depth determines that tomography thickness, level bore according to boreholes drilling result
It is more than tomography highest distance position 5m into length.
5. a kind of coal mine return air main entry passing fault tunneling construction method according to claim 1, it is characterised in that：In step
In S3, orifice tube is designed and fixes：
Orifice tube uses diameter 70mm welded tubes, and single long 6m, 7 unilateral band high pressure flanges, side is threaded, remaining orifice tube,
It is bilateral screw thread, flange side is welded with a little；
Orifice tube is fixed in two steps, and the first step is twined in orifice tube bond pad locations in numb tripping in drilling, and second step slip casting carries out
Full packages is fixed, the second the end of the step, and solidification 8h or more carries out secondary pore-forming after bulge test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610615757.0A CN106223961B (en) | 2016-07-28 | 2016-07-28 | A kind of coal mine return air main entry passing fault tunneling construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610615757.0A CN106223961B (en) | 2016-07-28 | 2016-07-28 | A kind of coal mine return air main entry passing fault tunneling construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106223961A CN106223961A (en) | 2016-12-14 |
| CN106223961B true CN106223961B (en) | 2018-11-06 |
Family
ID=57535523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610615757.0A Active CN106223961B (en) | 2016-07-28 | 2016-07-28 | A kind of coal mine return air main entry passing fault tunneling construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106223961B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837333A (en) * | 2017-01-17 | 2017-06-13 | 济宁矿业集团有限公司霄云煤矿 | A kind of fully-mechanized mining working pre-tunnel laneway road formula passing fault method |
| CN107939435A (en) * | 2017-12-17 | 2018-04-20 | 北京昊华能源股份有限公司 | A kind of coal road dash system |
| CN109057850A (en) * | 2018-08-27 | 2018-12-21 | 神木县隆德矿业有限责任公司 | A kind of novel load-carrying air crossing and return air detour piercing technique |
| CN113605913B (en) * | 2021-09-01 | 2024-05-07 | 东莞理工学院 | Rock underground passage construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936008A (en) * | 2010-09-30 | 2011-01-05 | 东北大学 | Rock slope three-dimensional model and block slide analysis method |
| CN102704950A (en) * | 2012-06-21 | 2012-10-03 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Support method used in passing water guide fracture structure in mine exploration |
| CN103016027A (en) * | 2013-01-21 | 2013-04-03 | 中南大学 | Tunnel or roadway excavating method under weak and broken complicated geological conditions |
| CN104389516A (en) * | 2014-10-15 | 2015-03-04 | 武汉高铁桩工科技有限公司 | Squeezing enlarging cast-in-situ bored pile hole forming method |
-
2016
- 2016-07-28 CN CN201610615757.0A patent/CN106223961B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936008A (en) * | 2010-09-30 | 2011-01-05 | 东北大学 | Rock slope three-dimensional model and block slide analysis method |
| CN102704950A (en) * | 2012-06-21 | 2012-10-03 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Support method used in passing water guide fracture structure in mine exploration |
| CN103016027A (en) * | 2013-01-21 | 2013-04-03 | 中南大学 | Tunnel or roadway excavating method under weak and broken complicated geological conditions |
| CN104389516A (en) * | 2014-10-15 | 2015-03-04 | 武汉高铁桩工科技有限公司 | Squeezing enlarging cast-in-situ bored pile hole forming method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106223961A (en) | 2016-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106223961B (en) | A kind of coal mine return air main entry passing fault tunneling construction method | |
| CN108060908A (en) | Water-rich sand layer long range horizontal orientation drilling grouting and reinforcing technology under groups of building | |
| CN105651132B (en) | Directional static blasting construction method for foundation pit stratum and combined guiding device for directional static blasting construction method | |
| CN106979012B (en) | Hidden conduit pipe Comprehensive Treatment method in shaft of vertical well freezing hole | |
| CN104481560A (en) | Roadway roof aquifer treatment method | |
| CN109098714A (en) | A kind of soft extremely irregularcoal seam fully mechanized coal face gob-side entry retaining method of high methane three | |
| CN111734482A (en) | Method for reducing damage by utilizing gangue cementation and bag grouting combined support | |
| CN103046955A (en) | Large-range goaf group filling method | |
| CN106968690A (en) | The method for tunnel construction for soil property of caving in | |
| CN102330567A (en) | Goaf slip casting treatment method of road | |
| CN106522981B (en) | Pass through the method for protecting support in goaf tunnel | |
| CN106837382B (en) | A kind of subway tunnel country rock pre grouting from the surface reinforcement process | |
| CN108487924B (en) | A kind of reinforcement means of soft coal level gob side entry driving thin coal pillar | |
| CN106567714A (en) | Grouting material for underground mine roadway and grouting water control method | |
| CN104370508A (en) | Coal mine floor rock mass grouting reinforcement method and grouting slurry | |
| CN108952727B (en) | A kind of grouting water blocking method of the vertical creviced formation of high inclination-angle | |
| CN108825298A (en) | A kind of stope filling connects top method | |
| CN109812269A (en) | It is a kind of suitable for second mining working face without pillar mining method | |
| CN101793154A (en) | Method for grouting for stopping up water by using geological parameters of tunnel surrounding rocks and setting relief holes | |
| CN108397199A (en) | The method for tunnel construction in water hole is connected under a kind of short distance | |
| CN109057798A (en) | A kind of wall type filling mining method suitable for gently inclined phosphate body bed | |
| CN109779663A (en) | Gob side entry retaining multi-zone cascade-control method | |
| CN109611109A (en) | Tunnel TBM constructed crushed zone disaster source controls in advance method and system | |
| CN109403914A (en) | Water column only starches two fluid grouting method in a kind of down-hole extra-deep hole drilling | |
| CN111287769A (en) | Tunnel surrounding rock advanced grouting reinforcement structure and construction method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |