CN110130897A - Roof weakening solution danger method - Google Patents
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- CN110130897A CN110130897A CN201910509617.9A CN201910509617A CN110130897A CN 110130897 A CN110130897 A CN 110130897A CN 201910509617 A CN201910509617 A CN 201910509617A CN 110130897 A CN110130897 A CN 110130897A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000003313 weakening effect Effects 0.000 title claims abstract description 22
- 238000005553 drilling Methods 0.000 claims abstract description 158
- 239000011435 rock Substances 0.000 claims abstract description 62
- 238000010276 construction Methods 0.000 claims abstract description 23
- 239000003245 coal Substances 0.000 claims description 23
- 239000002775 capsule Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 4
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- 238000005065 mining Methods 0.000 claims description 3
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- 230000009467 reduction Effects 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000008439 repair process Effects 0.000 abstract description 4
- 239000000725 suspension Substances 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 description 6
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Classifications
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- 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
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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Abstract
The embodiment of the invention discloses a kind of roof weakening solution danger methods comprising: determine the key stratum of top covering rockmass；Directional drilling is laid in the key stratum；It constructs the directional drilling；After the completion of the directional drilling construction, fracturing unit is delivered in directional drilling and carries out staged fracturing.Not only directional drilling can be accurately controlled in tight roof rock stratum using the embodiment of the present invention, the rock strength of tight roof can also be effectively reduced, destroy the whole continuity of rock, realize effective reduction of top plate, top plate area of suspension roof is eliminated or reduces, the advanced strong mine pressure of releasing working face extraction is dangerous；Meanwhile the effective of entire working face tight roof is caving, and can reduce and close on tunnel rock pressure, simplifies drift support type, high degree reduces repair of laneway project amount, to reduce roadway maintenance cost.
Description
Technical field
The present invention relates to technical field of coal mine, and in particular to a kind of roof weakening solution danger method.
Background technique
China is one of most abundant country of world's coal resources, but in earth history, and China undergoes more phase tectonic movements,
Basin complex superposition phenomenon is obvious, causes coal seam entirety occurrence condition complex.According to statistics, China has nearly 1/3 coal seam to be
Tight roof, and it is widely distributed.Covered on this tight roof be mainly roof thickness is stable, intensity is high, globality preferably and
The rock stratum that difficulty is caving, stable mechanical property and face timbering structure cause top plate area of suspension roof larger.With working face
Propulsion gradually increase, when top plate is difficult to support, outstanding rostellum is so caving, and so that stope is formed large area to press, and in thick hard rock
Under the action of the big caving angle of layer, ground pressure strength is greatly improved, the working face in stope and the supporting knot in two lanes are in turn resulted in
Structure large area loses destruction, and the impulsion pressure and strong dynamic load for being caving process formation make tunnel and surrouding rock deformation collapse, and makes simultaneously
It does great damage at neighbouring tunnel, transportation route, pipeline, the safety of great threat underground construction personnel is serious to constrain
Safety of coal mines efficiently produces.
Currently, the method administered for tight roof problem is mainly passive protecting: taking hydraulic support, special filling lane
Road or working face support tight roof rock stratum to avoid the unexpected inbreak of tight roof.Inventor is in the implementation of the present invention
It was found that existing passive method of payment can not fundamentally administer tight roof, punching caused by the outstanding top of large area can not be released
It is dangerous to hit mine pressure.
Summary of the invention
In view of this, the embodiment of the present invention proposes a kind of roof weakening solution danger method, to solve the above technical problems.
The embodiment of the present invention also provides a kind of roof weakening solution danger method comprising: determine the key stratum of top covering rockmass；?
Directional drilling is laid in the key stratum；It constructs the directional drilling；It is after the completion of the directional drilling construction, fracturing unit is defeated
It send to carrying out staged fracturing in directional drilling.
Optionally it is determined that the key stratum of top covering rockmass includes: the number of plies of top covering rockmass present on acquisition coal seam is directly pushed up
m；
According to formula
Calculate the amount of deflection that top n-th layer and (n+1)th layer of rock mass is directly pushed up in coal seam, wherein q1|n+1For (n+1)th layer of rock mass
Amount of deflection, hiFor the thickness of i-th layer of rock mass；γiFor the bulk density of i-th layer of rock mass；EiFor the elasticity modulus of i-th layer of rock mass；I=1,2 ...
M, n+1≤m；Work as q1|n+1< q1|nWhen, then using (n+1)th layer of rock mass as key stratum.
Optionally, directional drilling is laid in the key stratum includes: according to formula ∑ H=M/ (Kp- 1) caving zone is calculated
Rock mass is full of rock mass thickness H required for goaf, wherein M is mining height；Kp is the broken swollen coefficient after catalase；According to institute
Stating rock mass thickness determines the directional drilling in the installation position of the key stratum, wherein the bottom hole of directional drilling and coal seam are straight
The distance for connecing top is H.
Optionally, determine that the directional drilling in the installation position of the key stratum, is gone back later according to the rock mass thickness
It include: the width L for obtaining working face；Obtain the pressure break radius of influence d of fracturing unit；It is calculated and is oriented according to formula N=L/2d-1
The quantity N of drilling；N number of directional drilling is arranged at the installation position of key stratum, wherein the extending direction of each directional drilling
It is parallel with the tunneling direction of working face.
Optionally, the directional drilling of constructing includes: the geological information for obtaining and directly being pushed up in preset distance apart from coal seam；Root
According to the position of the installation position and drill site of the geological information, directional drilling in key stratum, the directional drilling is obtained
Planned course；The directional drilling machine construction directional drilling is utilized according to the planned course；The three-dimensional of directional drilling is obtained in real time
Space tracking information；Adjust the drilling tool of directional drilling machine in real time according to the three-dimensional space trace information and planned course.
Optionally, after the completion of the directional drilling construction, fracturing unit is delivered in directional drilling and carries out staged fracturing
It include: that hole flushing, cleaning bottom of hole are carried out to the directional drilling after the completion of the directional drilling construction；Fracturing unit is delivered to orientation
Staged fracturing is carried out in drilling.
Optionally, fracturing unit being delivered in directional drilling and carrying out staged fracturing includes: the length according to directional drilling
It determines to pressure break number；Directional drilling is segmented to pressure break number according to described, is determined to pressure break position；According to guide shoe, Dan Liu
Valve, the first sealing of hole capsule, flow controller, the second sealing of hole capsule, pressure duct and opening arrangement sequence assemble fracturing unit；It utilizes
Directional drilling machine by the fracturing unit be delivered to apart from directional drilling bottom hole it is nearest to pressure break position；According to the directional drilling
Bottom hole to aperture direction one by one described in pressure break to pressure break position.
Optionally, further includes: the thrust and reservoir quantity of real-time monitoring fracturing unit；According to the thrust and reservoir quantity
The fracturing effect for treating pressure break position is evaluated.
Optionally, according to described in the direction of the directional drilling bottom hole to aperture one by one pressure break to pressure break position after, also
It include: to be recycled fracturing unit by hauling out in directional drilling using directional drilling machine.
Optionally, the directional drilling is orientation horizontal drilling.
Roof weakening solution danger method provided in an embodiment of the present invention is led to by the directional drilling that designs and construct in key stratum
Fracturing unit pressure break directional drilling is crossed, not only directional drilling can be accurately controlled in tight roof rock stratum, moreover it is possible to be effectively reduced
The rock strength of tight roof destroys the whole continuity of rock, realizes effective reduction of top plate, eliminates or reduces top plate and hangs
Top area, it is advanced to release the strong mine pressure danger of working face extraction；Meanwhile the effective of entire working face tight roof is caving, and can reduce
Tunnel rock pressure is closed on, simplifies drift support type, high degree reduces repair of laneway project amount, to reduce roadway maintenance
Cost improves the safety coefficient of operation.
Detailed description of the invention
Fig. 1 is the flow chart of the roof weakening solution danger method of the embodiment of the present invention.
Fig. 2 is the operation schematic diagram of the fracturing unit of the embodiment of the present invention.
Fig. 3 is the distribution map of the directional drilling of the embodiment of the present invention.
Fig. 4 is the flow chart of the S100 of the embodiment of the present invention.
Fig. 5 is the flow chart of the S200 of the embodiment of the present invention.
Fig. 6 is the flow chart of the S300 of the embodiment of the present invention.
Fig. 7 is the flow chart of the S420 of the embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing and specific embodiment, technical solution of the present invention is described in detail.It is wherein identical
Components are presented with like reference characters.It should be noted that word "front", "rear" used in the following description, " left side ",
" right side ", "up" and "down" refer to that the direction in attached drawing, word "inner" and "outside" are referred respectively to towards or away from particular elements
The direction of geometric center.
Fig. 1 shows the flow chart of the roof weakening solution danger method of the embodiment of the present invention, as shown in Figure 1, the present invention is implemented
The roof weakening solution danger method that example provides, is primarily adapted for use in tight roof and weakens in advance, this method comprises:
S100 determines the key stratum of top covering rockmass；
There are certain key stratum, key stratum is referred to Overlying Strata In A Face part or until earth's surface Strata Overlying The Seam
Whole rock stratum activities rise control action rock stratum.
With the continuous progress of working face extraction, coal seam is directly pushed up and is caving in advance, directly the hard difficulty of key stratum of top top
It is caving.
S200 lays directional drilling in the key stratum；
In embodiments of the present invention, the depth of directional drilling is generally at 500 meters or more.
S300, the directional drilling of constructing；
It is constructed in key stratum 9 directional drilling 10 using directional drilling machine.As shown in Fig. 2, directional drilling 10 is that orientation is horizontal
Drilling.
As shown in figure 3, directional drilling 10 can be arranged in advance on the top plate in goaf 7, unrealized top plate is caving completely
Position is weakened, so that the top plate of 10 lower section of directional drilling is all caving.
S400 after the completion of the directional drilling construction, fracturing unit is delivered in directional drilling and carries out staged fracturing.
Fracturing unit is delivered to pressure break position using directional drilling machine, fracturing unit carries out segmentation pressure to directional drilling
It splits.
Roof weakening solution danger method provided in an embodiment of the present invention is led to by the directional drilling that designs and construct in key stratum
Fracturing unit pressure break directional drilling is crossed, not only directional drilling can be accurately controlled in tight roof rock stratum, moreover it is possible to be effectively reduced
The rock strength of tight roof destroys the whole continuity of rock, realizes effective reduction of top plate, eliminates or reduces top plate and hangs
Top area, it is advanced to release the strong mine pressure danger of working face extraction；Meanwhile the effective of entire working face tight roof is caving, and can reduce
Tunnel rock pressure is closed on, simplifies drift support type, high degree reduces repair of laneway project amount, to reduce roadway maintenance
Cost improves the safety coefficient of operation.
Further, as shown in figure 4, S100, determines that the key stratum of top covering rockmass includes:
S110, obtain coal seam directly push up present on top covering rockmass number of stories m；
Knowledge theory is sentenced according to key stratum, is combined distribution characteristics in conjunction with face roof rock stratum, is determined the number of plies of top covering rockmass
For m.Top first layer rock stratum is directly pushed up using coal seam as key stratum, the rock mass that can control is located at n-th above the key stratum
Layer.
S120, according to formula
Calculate the amount of deflection that top n-th layer and (n+1)th layer of rock mass is directly pushed up in coal seam；
Wherein, q1|n+1For the amount of deflection of (n+1)th layer of rock mass, hiFor the thickness of i-th layer of rock mass；γiFor the appearance of i-th layer of rock mass
Weight；EiFor the elasticity modulus of i-th layer of rock mass；I=1,2 ... m, n+1 < m.
S130 works as q1|n+1< q1|nWhen, then using (n+1)th layer of rock mass as key stratum.
q1|n+1< q1|nIndicate that the amount of deflection of n-th layer rock mass is greater than (n+1)th layer of rock mass amount of deflection.
Since the deformation of n-th layer is greater than (n+1)th layer of deformation, (n+1)th layer and its upper load can be by its own structures
It undertakes, does not need to be transmitted to lower part rock stratum shared.
By cycle calculations, when calculating to there is q1|n+1< q1|nWhen, it can thus judge the position of key stratum.
It is calculated by above-mentioned two formula, to find the position of key stratum, improves the accuracy of positioning drilling setting.
Preferably, as shown in figure 5, S200, directional drilling is laid in the key stratum, specifically includes:
S210, according to formula
∑ H=M/ (Kp-1)
Caving zone rock mass is calculated full of rock mass thickness H required for goaf；
Wherein, M is mining height；KpFor the broken swollen coefficient after catalase.
S220 determines the directional drilling in the installation position of the key stratum according to the rock mass thickness；
Wherein, the bottom hole of directional drilling and coal seam directly push up at a distance from for H.As shown in Figures 2 and 3, the water of directional drilling 10
Flat section is H apart from the distance that coal seam is directly pushed up.
According to key stratum structure, roof caving height needed for being full of in conjunction with goaf and forming effectively support determines orientation
It drills in key stratum and meeting goaf full of demand, so that enabling to directional drilling 10 in directional drilling after pressure break
The rock stratum of lower section is all caving, and guarantees that pressure break weakens effect.
Preferably, as shown in figure 5, S220, determines the directional drilling in the key stratum according to the rock mass thickness
Installation position, later further include:
S230 obtains the width L of working face；
S240 obtains the pressure break radius of influence d of fracturing unit；
Wherein, the pressure break radius of influence is the half of 10 spacing of directional drilling.
S250 calculates the quantity N of directional drilling according to formula N=L/2d-1；
N number of directional drilling is arranged at the installation position of key stratum S260, wherein the extension side of each directional drilling
The tunneling direction of Xiang Junyu working face is parallel.
As shown in figure 3, the quantity of directional drilling 10 is three, the respectively hole 1-1, the hole 1-2 and the hole 1-3, each Directional Drilling
The horizontal segment in hole 10 is parallel with the tunneling direction of working face.
By the way that multiple directional drillings are arranged in key stratum, the pressure break gap of adjacent directional drilling is connected, and is formed three-dimensional
Three-dimensional crack continuous space can further reduce rock strength, destroy rock entirety continuity, realize top plate target formation
Effectively reduction.
Further, as shown in fig. 6, S300, the directional drilling of constructing, specifically include:
S310 obtains the geological information directly pushed up in preset distance apart from coal seam；
Wherein, geological information may include flat, profile change information of lithology etc..It directly pushes up for example, obtaining coal seam to ground
Lithology is flat, profile change hum pattern.
S320 is obtained according to the position of the installation position and drill site of the geological information, directional drilling in key stratum
The planned course of the directional drilling out；
S330 utilizes the directional drilling machine construction directional drilling according to the planned course；
S340 obtains the three-dimensional space trace information of directional drilling in real time；
Using the measurement-while-drilling system of directional drilling machine, the three-dimensional space trace information of directional drilling is obtained.
S350 adjusts the drilling tool of directional drilling machine according to the three-dimensional space trace information and planned course in real time.
Using the drilling machine tool-face angle of the screw motor adjustment directional drilling machine of directional drilling machine.
By adjusting the drilling position of directional drilling machine in real time, it is precisely controlled drilling and is located in key stratum.In the present embodiment,
Directional drilling one opens reaming to the aperture 193mm, the casing that aperture is 146mm is then divided into directional drilling, which passes through
Coal seam about 10m.It after casing Hou Ning, is crept into according to the planned course of directional drilling and aperture, until whole hole.
Preferably, S400, after the completion of the directional drilling construction, fracturing unit is delivered in directional drilling and is segmented
Pressure break specifically includes:
S410 after the completion of the directional drilling construction, carries out hole flushing, cleaning bottom of hole to the directional drilling；
Fracturing unit is delivered in directional drilling and carries out staged fracturing by S420.
By carrying out cleaning bottom of hole, hole flushing to directional drilling, the inner wall of directional drilling can be made steady, smooth, so that fracturing unit
It can smoothly enter into directional drilling.
Further, as shown in fig. 7, S420, fracturing unit is delivered in directional drilling and carries out staged fracturing, specifically
Include:
S421 is determined according to the length of directional drilling to pressure break number；
In the present embodiment, the design length of directional drilling 10 be 500 meters, number to be divided be 8 times, that is, be divided into 8 sections into
Row pressure break.
S422 is segmented directional drilling to pressure break number according to described, determines to pressure break position；
According to the distance of 10 horizontal segment of directional drilling, point 8 sections of settings are to pressure break position, the adjacent spacing phase to pressure break position
Together.
S423, according to guide shoe, ball-and-seat, the first sealing of hole capsule, flow controller, the second sealing of hole capsule, pressure duct and aperture
The sequence of device assembles fracturing unit；
S424, using directional drilling machine by the fracturing unit be delivered to apart from directional drilling bottom hole it is nearest to pressure break position
It sets；
Pressure break is equipped according to guide shoe 1+ ball-and-seat 2+ the first sealing of hole capsule 3+ flow controller 5+ the second sealing of hole capsule 4+ high pressure
Pipeline+opening arrangement sequence is assembled, and using directional drilling machine by pressure break equipment send to directional drilling hole bottom distance most
It is close to pressure break position.
S425, according to the direction of the directional drilling bottom hole to aperture one by one described in pressure break to pressure break position.
Pressure break pump group is debugged first, and connects water route, wherein pressure break pump group is located in drill site.Each pipeline valve doors and door fittings
Connect it is firm after, open high pressure fracture pump group, when pressure reaches the expansion limit pressure of sealing of hole capsule in directional drilling 10, the
One sealing of hole capsule 3 and the second expansion rapidly of sealing of hole capsule 4, form one section of enclosure space in directional drilling.
After the first sealing of hole capsule 3 and the second sealing of hole capsule 4 realize that expansion is set completely, continue to adjust directional drilling internal pressure
Power reaches the design pressure of flow controller 5.
Flow controller 5 between the first sealing of hole capsule 3 and the second sealing of hole capsule 4 is opened, and high pressure fracture liquid is injected mesh
It marks in fracturing section, forms effective fracture 6.
Cooperate pressure break to equip remote control system, pressing crack construction risk can be evaded, and realize pressure far from pressing crack construction place
Split the real-time monitorings of the data such as equipment thrust, reservoir quantity and automatically save, according to thrust and reservoir quantity to fracturing effect into
Row effective evaluation.
For example, gradually decreasing after pressure break force curve increases suddenly, reservoir quantity is gradually increased always, illustrates to have formd
The crack 6 of effect, fracturing effect is preferable.
After completing first segment pressing crack construction, the pressure break pumping-in equipment at directional drilling aperture is closed, opening arrangement is utilized
Carry out aperture draining release (opening arrangement simultaneous with pressure maintaining, prevent fracturing fluid flow backwards etc. functions, pressure maintaining sight can be carried out when necessary
Survey), the first sealing of hole capsule 3 and 4 automatic rebounding of the second sealing of hole capsule to reset condition.
Aperture high-voltage tube column is dragged using directional drilling machine, fracturing unit is dragged to next to pressure break position, carried out down
One section of pressing crack construction, repeatedly until completing whole pressing crack constructions of single hole design segments.
After the completion of single directional drills whole pressing crack constructions, using directional drilling machine by remainder pressure break in directional drilling
Equipment is withdrawn from, and is maintained pressure break equipment, accomplishes recycling for pressure break equipment.
Then, pressure break successively is carried out to remaining directional drilling.It finally combines the pressure break of multiple directional drillings to be laid out, makes to press
Crack extension is covered at the top of entire working face, forms a set of effective three-dimensional cracking, tight roof is caused effectively to be caving.
It is also had the advantages that using the roof weakening solution danger method of the embodiment of the present invention
1, using method of the invention, directional drilling is accurately controlled in tight roof rock stratum, multistage, essence are realized
Staged fracturing constructions quasi-, under high pressure conditions, establish fractured layer position 3 D stereo crack continuous space, reduce rock strength,
Rock entirety continuity is destroyed, realizes effective reduction of top plate target formation；
2, using method of the invention, it can be achieved that single hole first advance back production 500m or more, and the top greater than 8 sections is carried out
The reduction construction of plate staged fracturing, realizes that ahead work face screens back production, guarantees back production safety, improves back production efficiency；
3, after coal seam tight roof directional long borehole segmentation hydraulic fracturing construction, stress suffered by force piece significantly subtracts
Small, surrouding rock deformation and extent of the destruction also accordingly reduce, and avoid or reduce force piece pressure rack, try to stop people from fighting each other, pucking and wall caving etc.
Phenomenon, eliminates or reduces top plate area of suspension roof, and the advanced strong mine pressure of releasing working face extraction is dangerous；The entire hard top of working face simultaneously
Effectively being caving for plate, reduces and closes on tunnel rock pressure, simplifies drift support type, and high degree reduces repair of laneway work
Cheng Liang reduces roadway maintenance cost；
4, utilization is method of the invention it is achieved that the smooth recycling that staged fracturing the whole series pressure break is equipped, ensure that pressure break is applied
Work efficiency rate reduces method application cost, improves application range and effect.
More than, technical solution of the present invention is described in detail in conjunction with specific embodiments, described specific implementation
Example is used to help understand thought of the invention.The derivation that those skilled in the art make on the basis of the specific embodiment of the invention
It is also belonged within the scope of the present invention with modification.
Claims (10)
- A kind of method 1. roof weakening solution is endangered characterized by comprisingDetermine the key stratum of top covering rockmass；Directional drilling is laid in the key stratum；It constructs the directional drilling；After the completion of the directional drilling construction, fracturing unit is delivered in directional drilling and carries out staged fracturing.
- The method 2. roof weakening solution as described in claim 1 is endangered, which is characterized in that the key stratum for determining top covering rockmass includes:Obtain coal seam directly push up present on top covering rockmass number of stories m；According to formulaCalculate the amount of deflection that top n-th layer and (n+1)th layer of rock mass is directly pushed up in coal seam, wherein q1|n+1For the amount of deflection of (n+1)th layer of rock mass, hiFor the thickness of i-th layer of rock mass；γiFor the bulk density of i-th layer of rock mass；EiFor the elasticity modulus of i-th layer of rock mass；I=1,2 ... m, n+1 ≤m；Work as q1|n+1< q1|nWhen, then using (n+1)th layer of rock mass as key stratum.
- The method 3. roof weakening solution as claimed in claim 2 is endangered, which is characterized in that lay directional drilling in the key stratum Include:According to formula∑ H=M/ (Kp-1)Caving zone rock mass is calculated full of rock mass thickness H required for goaf, wherein M is mining height；KpIt is broken after catalase Swollen coefficient；Determine the directional drilling in the installation position of the key stratum according to the rock mass thickness, wherein the hole of directional drilling Bottom and coal seam directly push up at a distance from for H.
- The method 4. roof weakening solution as claimed in claim 3 is endangered, which is characterized in that it is described fixed to be determined according to the rock mass thickness To the installation position to drill in the key stratum, later further include:Obtain the width L of working face；Obtain the pressure break radius of influence d of fracturing unit；The quantity N of directional drilling is calculated according to formula N=L/2d-1；N number of directional drilling is arranged at the installation position of key stratum, wherein the extending direction of each directional drilling with work The tunneling direction in face is parallel.
- The method 5. roof weakening solution as claimed in claim 4 is endangered, which is characterized in that the directional drilling of constructing includes:Obtain the geological information directly pushed up in preset distance apart from coal seam；According to the position of the installation position and drill site of the geological information, directional drilling in key stratum, the orientation is obtained The planned course of drilling；The directional drilling machine construction directional drilling is utilized according to the planned course；The three-dimensional space trace information of directional drilling is obtained in real time；Adjust the drilling tool of directional drilling machine in real time according to the three-dimensional space trace information and planned course.
- The method 6. roof weakening solution as described in claim 1 is endangered, which is characterized in that, will after the completion of the directional drilling construction Fracturing unit is delivered to progress staged fracturing in directional drillingAfter the completion of the directional drilling construction, hole flushing, cleaning bottom of hole are carried out to the directional drilling；Fracturing unit is delivered in directional drilling and carries out staged fracturing.
- The method 7. roof weakening solution as claimed in claim 6 is endangered, which is characterized in that fracturing unit is delivered in directional drilling Carrying out staged fracturing includes:It is determined according to the length of directional drilling to pressure break number；Directional drilling is segmented to pressure break number according to described, is determined to pressure break position；According to the sequence of guide shoe, ball-and-seat, the first sealing of hole capsule, flow controller, the second sealing of hole capsule, pressure duct and opening arrangement Assemble fracturing unit；Using directional drilling machine by the fracturing unit be delivered to apart from directional drilling bottom hole it is nearest to pressure break position；According to the direction of the directional drilling bottom hole to aperture one by one described in pressure break to pressure break position.
- The method 8. roof weakening solution as claimed in claim 7 is endangered, which is characterized in that further include:The thrust and reservoir quantity of real-time monitoring fracturing unit；It is evaluated according to the fracturing effect that the thrust and reservoir quantity treat pressure break position.
- The method 9. roof weakening solution as claimed in claim 7 is endangered, which is characterized in that according to the directional drilling bottom hole to aperture Direction one by one described in pressure break to pressure break position after, further includes:Fracturing unit is recycled by hauling out in directional drilling using directional drilling machine.
- The method 10. the roof weakening solution as described in claim 1-9 is any is endangered, which is characterized in that the directional drilling is orientation Horizontal drilling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509617.9A CN110130897A (en) | 2019-06-13 | 2019-06-13 | Roof weakening solution danger method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509617.9A CN110130897A (en) | 2019-06-13 | 2019-06-13 | Roof weakening solution danger method |
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| CN110130897A true CN110130897A (en) | 2019-08-16 |
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| CN110685688A (en) * | 2019-09-27 | 2020-01-14 | 中国矿业大学 | Coal mine surrounding rock control method based on chemical modification |
| CN111058819A (en) * | 2019-12-06 | 2020-04-24 | 天地科技股份有限公司 | Method for covering hard top plate on hydraulic fracture treatment working face |
| CN111255463A (en) * | 2020-02-21 | 2020-06-09 | 中煤科工集团西安研究院有限公司 | Hard top plate comb-shaped long drilling segmented fracturing roadway deformation source treatment method |
| CN111322048A (en) * | 2020-02-21 | 2020-06-23 | 中煤科工集团西安研究院有限公司 | Hard roof rock burst subsection direction-control fracturing treatment technology |
| CN111677514A (en) * | 2020-05-06 | 2020-09-18 | 中煤科工开采研究院有限公司 | Roof weakening method |
| CN112253114A (en) * | 2020-09-10 | 2021-01-22 | 中煤科工集团西安研究院有限公司 | Method for weakening hard gangue layer in coal seam by underground coal mine deep hole hydraulic presplitting |
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| CN110685688B (en) * | 2019-09-27 | 2021-01-01 | 中国矿业大学 | Coal mine surrounding rock control method based on chemical modification |
| CN110685688A (en) * | 2019-09-27 | 2020-01-14 | 中国矿业大学 | Coal mine surrounding rock control method based on chemical modification |
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| CN111322048A (en) * | 2020-02-21 | 2020-06-23 | 中煤科工集团西安研究院有限公司 | Hard roof rock burst subsection direction-control fracturing treatment technology |
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| CN111677514A (en) * | 2020-05-06 | 2020-09-18 | 中煤科工开采研究院有限公司 | Roof weakening method |
| CN111677514B (en) * | 2020-05-06 | 2022-01-14 | 中煤科工开采研究院有限公司 | Roof weakening method |
| CN112253114A (en) * | 2020-09-10 | 2021-01-22 | 中煤科工集团西安研究院有限公司 | Method for weakening hard gangue layer in coal seam by underground coal mine deep hole hydraulic presplitting |
| CN112253113A (en) * | 2020-09-10 | 2021-01-22 | 中煤科工集团西安研究院有限公司 | Method for weakening hard gangue layer by coal mine underground directional long drilling and staged hydraulic fracturing |
| CN112377221B (en) * | 2020-10-30 | 2022-09-23 | 中煤科工集团西安研究院有限公司 | Method for inhibiting development of water guide crack belt by grouting before mining and building key layer of structure |
| CN112377221A (en) * | 2020-10-30 | 2021-02-19 | 中煤科工集团西安研究院有限公司 | Method for inhibiting development of water guide crack belt by grouting before mining and building key layer of structure |
| CN112593936A (en) * | 2020-11-27 | 2021-04-02 | 陕西彬长孟村矿业有限公司 | Advanced comprehensive prevention and control method for multiple disaster areas of deep mine |
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| CN113062739B (en) * | 2021-04-15 | 2023-04-25 | 神华神东煤炭集团有限责任公司 | Goaf water disaster and strong mine pressure disaster cooperative treatment method |
| CN113236360A (en) * | 2021-06-29 | 2021-08-10 | 中煤科工开采研究院有限公司 | Method for preventing and controlling exploding roadway group rock burst |
| WO2023273091A1 (en) * | 2021-06-29 | 2023-01-05 | 中煤科工开采研究院有限公司 | Method for preventing and controlling rock bursts in development roadway group |
| CN114215530A (en) * | 2021-11-29 | 2022-03-22 | 中国矿业大学 | Rapid roadway driving method for hard roof directional hydraulic fracturing gob-side roadway |
| CN114215530B (en) * | 2021-11-29 | 2024-04-19 | 中国矿业大学 | Rapid roadway digging method for directional hydraulic fracturing gob-side roadway of hard top plate |
| CN114370272A (en) * | 2021-12-30 | 2022-04-19 | 中矿科创(北京)煤炭技术有限公司 | Directional hydraulic top cutting method and device |
| CN114370272B (en) * | 2021-12-30 | 2024-05-07 | 中矿科创(北京)煤炭技术有限公司 | Directional hydraulic roof cutting method and device thereof |
| CN114776272A (en) * | 2022-05-25 | 2022-07-22 | 中国矿业大学(北京) | Pressure-relief permeability-increasing method for overlying key layer of hydraulic fracturing |
| CN117552786A (en) * | 2024-01-12 | 2024-02-13 | 中煤科工开采研究院有限公司 | Top plate frosted jet flow fracturing and top cutting device and top cutting method |
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