CN108194138A - A kind of structure and method that the high-ground stress release of presplitting realization deep ground is oriented to based on phase transformation - Google Patents
A kind of structure and method that the high-ground stress release of presplitting realization deep ground is oriented to based on phase transformation Download PDFInfo
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- CN108194138A CN108194138A CN201711461372.4A CN201711461372A CN108194138A CN 108194138 A CN108194138 A CN 108194138A CN 201711461372 A CN201711461372 A CN 201711461372A CN 108194138 A CN108194138 A CN 108194138A
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- 230000009466 transformation Effects 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000011435 rock Substances 0.000 claims abstract description 66
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 239000002826 coolant Substances 0.000 claims abstract description 25
- 239000003507 refrigerant Substances 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims description 32
- 239000007924 injection Substances 0.000 claims description 32
- 230000002093 peripheral effect Effects 0.000 claims description 9
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- 230000008014 freezing Effects 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 6
- 238000010257 thawing Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 19
- 230000015572 biosynthetic process Effects 0.000 abstract description 11
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- 238000010276 construction Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention relates to a kind of structures and method that the high-ground stress release of presplitting realization deep ground is oriented to based on phase transformation, first inject in depth formation high pressure water, complete the release of first time high-ground stress；Cooling medium liquid conducts cold energy to high pressure water, and water reaches phase transition temperature and volume expansion occurs, and rock crack is further stretched, and completes the release of second of high-ground stress；Stop circulating refrigerant liquid, ice-out Cheng Shuihou completes the release of third time high-ground stress.The present invention is to carry out high-ground stress release using Transformation Principle, so as to reduce rock burst, improve rock drilling rate.
Description
Technical field
The invention belongs to stress pre-release methods in the energy development of deep ground, and in particular to one kind is real based on phase transformation guiding presplitting
The now structure and method of deep ground high-ground stress release.
Background technology
Deep ground often has the characteristics that high temperature and pressure, wherein typical phenomenon of the Rock-burst as high-ground stress feature.Rock
Quick-fried phenomenon generally existing in deep ground rock drilling broken rock, significantly impacts deep ground energy extraction process, and serious threat is exploited deeply
Personnel in the process, property safety become the technical issues of urgently to be resolved hurrily in deep ground energy development process.For example, 2016 8
The moon 15, at Jining of Shandong Province beam treasured temple, rock burst accident has occurred in developing deeply in coal mine, causes 2 people's injures and deaths, and carry out height to it
Volume is paid an indemnity；On March 9th, 2014, Yunnan Province Gong Shanxian Dulong River highway tunnel constructions scene occur rock burst accident, cause 3 to apply
Work personnel death;Rock burst accident occurs in the coal mine of Yima, henan Province is developed deeply on November 3rd, 2011, cause 10 people dead.
Therefore, in order to ensure deep ground rock drilling construction progress and personnel safety, it is necessary to use necessary, reasonable, effective stress
Pre-release measure.And in fact, having carried out many researchs, and take currently for the high-ground stress pre-release engineering measure of deep ground
Obtained more significant effect.Specific practice mainly includes：（1）By to High Ground Stress Areas prebored hole release of pressure；（2）By weak quick-fried
Broken method carries out stress release to High Ground Stress Areas;（3）By to High Ground Stress Areas spray cold water carry out stress release but more than 3 kinds
Method is clearly disadvantageous there are still some, is embodied in：（1）It, should although can solve the problems, such as stress release by drilling
Power release is slower, certain danger is brought to staff, but accelerate to the speed of stress release, needs to increase drilling
Density, extend the duration, increase production cost and shorten the service life of drilling machine.（2）1. it is difficult control medicine using drilling and blasting method
Amount number and Smooth Blasting Effects, and then lead to the disturbance of peripheral rock.2. because concussion of blasting triggers rock burst in construction.
3. it cannot strictly control hole depth and length of shot.（3）The Surrounding Rock Strength on surface layer can be reduced to a certain extent by spraying cold water, be changed
The physical and mechanical property of kind country rock.But perhaps this have a remarkable effect only for the relatively low rock mass of intensity, and for intensity compared with
Rock mass high, that property is crisp is then extremely difficult to ideal effect.More than As-Is analysis is based on, considers how that selection is safe, efficient, fast
Stress pre-release method will have important realistic function and far-reaching significance for later stage deep ground energy security exploitation.
Invention content
In order to safely, efficiently, fastly discharge the prestressing force of deep ground rock drilling, it is oriented to the present invention provides one kind based on phase transformation
The structure and method of deep ground high-ground stress release are realized in presplitting.The technical problem to be solved in the present invention is real by the following technical programs
It is existing：
A kind of deep ground high-ground stress release structure, including：Multiple stress relief holes, interior be equipped with of each stress relief hole can follow
The U-shaped circulation pipe of ring cooling medium liquid, the opening of each stress relief hole are equipped with sealing-plug, are set at the center of the sealing-plug
There is the water injection pipe connected with stress relief hole, water is drained to the inner cavity of stress relief hole by the water injection pipe, and causes water in
Chamber is penetrated into formation fractures；
Two free ends of the U-shaped circulation pipe are connect after being pierced by sealing-plug with refrigerant holding vessel.
A kind of above-mentioned deep ground high-ground stress release structure, the aperture of the stress relief hole is 90mm~110mm, described
The hole depth of stress relief hole is 5m~7m, and the pitch of holes of two neighboring stress relief hole is 0.5m~1m.
Above-mentioned a kind of deep ground high-ground stress release structure, during the peripheral wall of the arc pipeline section of the U-shaped circulation pipe is equipped with
Empty inductance loop, the inner cavity of the inductance loop is equipped with temperature sensor and feeling of stress is accrued, the temperature sensor and pressure sensitive
The sensing head of meter is pierced by inductance loop, to realize the real-time acquisition to coolant-temperature gage and pressure；
The temperature sensor and the accrued output terminal of feeling of stress are connect with control system.
A kind of above-mentioned deep ground high-ground stress release structure, the vertical pipe section of the U-shaped circulation pipe is spiral coil structure,
The U-shaped circulation pipe is copper pipe.
A kind of method that the high-ground stress release of presplitting realization deep ground is oriented to based on phase transformation, is included the following steps：
Step 1: multiple stress relief holes are opened up to rock stratum using drill jumbo；
Step 2: U-shaped circulation pipe and water injection pipe are inserted into each stress relief hole, it is close in the opening installation of stress relief hole
Blocking, and the free end of U-shaped circulation pipe and water injection pipe is made to be pierced by sealing-plug；
Step 3: using high-pressure hydraulic pump water filling into the water injection pipe of step 2, water is drained in stress relief hole by water injection pipe
Chamber, and the inner cavity of water seif-citing rate release aperture is caused to penetrate into formation fractures, complete the release of first time high-ground stress；
Step 4: the free end of circulation pipe U-shaped in step 2 is connect with refrigerant holding vessel, refrigeration system is transferred to cold energy and deposits
The refrigerant holding vessel of cooling medium liquid is placed with, cooling medium liquid is delivered to by U-shaped circulation pipe by cryogenic pump, causes formation fractures after water freezing
The release of second of high low stress is completed in expansion；
Step 5: closing the cryogenic pump in step 4, ice-out Cheng Shui completes the release of third time high-ground stress.
A kind of above-mentioned method that the high-ground stress release of presplitting realization deep ground is oriented to based on phase transformation, is further included Step 6: institute
It states in step 5 and is not up to safety value after the release of third time high-ground stress, step 4 and step 5 are repeated, in stress relief hole
Water carry out thawing cycle, until reach high-ground stress release safety value.
A kind of above-mentioned method that the high-ground stress release of presplitting realization deep ground is oriented to based on phase transformation, the step 1 and step
Step a is further included between two, multiple through-holes stretched out for sensing head, the inner cavity of the inductance loop are opened up on the peripheral wall of inductance loop
It is equipped with that temperature sensor, feeling of stress are accrued, then inductance loop is installed on the peripheral wall of arc pipeline section of U-shaped circulation pipe, with reality
Now to the real-time acquisition of the temperature of water, pressure in stress relief hole.
Compared with prior art, beneficial effects of the present invention：
The present invention is to carry out high-ground stress release using Transformation Principle, so as to reduce rock burst, improve rock drilling rate.
Description of the drawings
Fig. 1 is the schematic diagram one of deep ground high-ground stress release structure；
Fig. 2 is the method flow diagram that the high-ground stress release of presplitting realization deep ground is oriented to based on phase transformation；
Fig. 3 is the structure diagram of coolant circulating system；
Fig. 4 is the schematic diagram two of deep ground high-ground stress release structure；
Fig. 5 is the left view of Fig. 4；
Fig. 6 is the distribution schematic diagram of microseism device；
Fig. 7 is the stereoscopic schematic diagram of deep ground high-ground stress release structure；
Fig. 8 is the structure diagram of a M shape arrangement stress relief hole；
Fig. 9 is the structure diagram of multiple M shape cloth holes.
In figure：100th, rock stratum；1st, stress relief hole；2nd, U-shaped circulation pipe；3rd, water injection pipe；4th, inductance loop；41st, conducting wire；5th, it is micro-
Shake device；6th, sealing-plug；10th, refrigeration system；20th, cooling medium liquid holding vessel；30th, cryogenic pump；40th, waterproof pump box；50th, room temperature pumps；60、
Room temperature refrigerant accumulator tank；70th, refrigerant room temperature pumps.
Specific embodiment
Further detailed description is done to the present invention, but embodiments of the present invention are not limited to reference to specific embodiment
This.
A kind of safe, efficient, fast release deep ground prestressed method of rock drilling is present embodiments provided, including following step
Suddenly：
Step 1: opening up multiple stress relief holes 1 to rock stratum 100 using drill jumbo, multiple stress relief holes 1 use five figured cloths
It puts or rice font is arranged；
Step 2: opening up multiple through-holes stretched out for sensing head on the peripheral wall of inductance loop 4, the inner cavity of inductance loop 4 is equipped with temperature
It spends that sensor, feeling of stress are accrued, then inductance loop 4 is installed on the peripheral wall of arc pipeline section of U-shaped circulation pipe 2, to realize correspondence
The real-time acquisition of the temperature of water, pressure in power release aperture 1；U-shaped circulation pipe 2 and water injection pipe are inserted into each stress relief hole 1
3, sealing-plug is installed, and the free end of U-shaped circulation pipe 2 and water injection pipe 3 is made to be pierced by sealing-plug in the opening of stress relief hole 1；
Step 3: using high-pressure hydraulic pump water filling into the water injection pipe 3 of step 2, water is drained to stress relief hole 1 by water injection pipe 3
Inner cavity, and cause inner cavity infiltration 100 crack of rock stratum of water seif-citing rate release aperture 1, the pressure of water in the accrued real-time monitoring holes of feeling of stress
Power to ensure the safety of the injecting process, completes the release of first time high-ground stress；
Step 4: the free end of circulation pipe 2 U-shaped in step 2 is connect with refrigerant holding vessel, refrigeration system 10 transmits cold energy
There is the refrigerant holding vessel of cooling medium liquid to storage, cooling medium liquid is delivered to by U-shaped circulation pipe 2 by cryogenic pump 30, is caused after water freezing
100 fracture propagation of rock stratum completes the release of second of high low stress, while temperature sensor transmits the temperature information of water in hole
To control system；
Step 5: closing the cryogenic pump 30 in step 4, ice-out Cheng Shui completes the release of third time high-ground stress；
Step 6: being not up to safety value after the release of third time high-ground stress in step 5, step 4 and step 5 are repeated, to stress
Water in release aperture 1 carries out thawing cycle, until reaching the safety value of high-ground stress release.
With reference to Fig. 1, the present embodiment also discloses a kind of deep ground high-ground stress release structure, including：It is put using five figured cloths
Multiple stress relief holes 1, the interior U-shaped circulation pipe 2 for being equipped with recyclable cooling medium liquid of each stress relief hole 1, each stress relief hole 1
Opening be equipped with sealing-plug, the water injection pipe 3 that connect with stress relief hole 1, the general of water injection pipe 3 are equipped at the center of the sealing-plug
Water is drained to the inner cavity of stress relief hole 1, and water is penetrated into from inner cavity in 100 crack of rock stratum；Two of U-shaped circulation pipe 2 are certainly
It is pierced by after sealing-plug by end and is connect with refrigerant holding vessel.
The aperture of the present embodiment stress relief hole 1 is 90mm ~ 110mm, and the hole depth of stress relief hole 1 is 5m ~ 7m, adjacent
The pitch of holes of two stress relief holes 1 is 0.5m ~ 1m.
The characteristics of high-ground stress method for releasing of the present embodiment, is：Cause water repeatedly using circulating refrigerant in drilling+hole
It freezes or melts, so as to which deep formation 100 be made to reach safe range.
When in use, perforation is carried out to rock stratum 100 first（The diameter of hole is about 90mm-110mm）, drilling is using five flowers
Arrangement（As shown in Figure 1）Or rice font arrangement（As shown in Figure 8 and Figure 9）, drilling depth is about 5~7m, and pitch of holes is about 0.5~
1m.Then to being inserted into U-shaped circulation pipe 2 and water injection pipe 3, and stopple beyond the Great Wall in drilling（General iron plate plug）.
Then, cold energy is conveyed into refrigerant accumulator tank by refrigeration system 10, the temperature of cooling medium liquid is made to be down to -20 to -42
℃.The reasons why temperature of cooling medium liquid is down to -20 to -42 DEG C be：Anti-icing fluid choosing is 42 types, and freezing point is -42 degree.
Secondly, phase-transition liquid is injected in deep formation 100, is the releasing effect of a high-ground stress during this, examines
Consider phase-transition liquid and should easily obtain, is pollution-free, generation harmless on rock stratum 100 and not influencing the unfavorable conditions such as construction, in phase transformation
In the selection of liquid, phase-transition liquid is water.
Again, cooling medium liquid conducts cold energy to phase-transition liquid, phase-transition liquid is made to reach phase transition temperature and generating body product expansion, and make
It obtains 100 crack of rock stratum further to stretch, in the process, for the heavily stressed secondary release of deep formation 100, this secondary stress is released
The effect that can reach default rock mining is put, and reaches the possibility for reducing rock burst, improves rock penetration performance.
Then, using refrigerant fluid circulation, in U-shaped circulation pipe 2 with the injection cooling of the discharge capacity of 0.5-2.5m3/min after
Cooling medium liquid；It is made to melt naturally after phase-transition liquid is cured, when temperature stress device shows that 100 stress of bottom hole temperature (BHT) depth formation reaches
It in safe range, while detects rock using microseism device 5 and reaches cracking effect, then stop the injection of cooling medium liquid,
Finally, U-shaped circulation pipe 2 and water injection pipe 3 are extracted out, high-ground stress release terminates；When extracting pipeline out, ice-out Cheng Shui,
During this again be a high-ground stress releasing result.
It may be noted that in the present embodiment, five flower holes arrangement may be used in multiple stress relief holes, can also use M shape
Arrangement by how improving high stress surrouding rock stress environment to different pressure relief vents arrangement, reducing surrouding rock deformation and being calculated, analyzed
Afterwards, best pressure relief vent arrangement is a meter word hole.From whole English teaching as can be seen that pressure relief vent arrangement is by single
Be arranged into five figured cloths put arrive again rice word hole arrangement（In the case of equal area, the arbitrary five opposite skies in rice word hole can form
Five flower holes, release superposition circle increase, and increase the effect of release）, corresponding pressure relief vent surrounding peak stress is all by drilling
The heart is mobile to outside, and hole is formed about distressed zone, and pressure relief vent is more, and since distressed zone is overlapped mutually influence, relief range is rapid
Increase, so release effect is the most apparent in the case of rice word hole is put；Deep wall rock stress analysis.From deep wall rock stress distribution song
Line compares it is recognised that pressure relief vent rice can not only be such that tunnel-surrounding high stress is shifted to deep, can also reduce stress from hole
Peak value effectively improves roadway surrounding rock ambient stress；Deformation Analysis of Surrounding Rock.Under the deployment scenarios of rice word hole, deformation of the surrounding rock in tunnel
Best control is obtained, control deformation effect is notable.
The characteristics of the present embodiment is：
（1）Phase-transition liquid is injected in deep formation 100, is the release of a high-ground stress during this.
（2）Cooling medium liquid conducts cold energy to phase-transition liquid, phase-transition liquid is made to reach phase transition temperature and generating body product expansion, and cause
100 crack of rock stratum is further stretched, and in the process, for the heavily stressed secondary release of deep formation 100, reduces rockburst risk,
Improve rock penetration performance.（Circulating refrigerant presplitting i.e. in hole）
（3）Extract out pipeline when, ice-out Cheng Shui, during this again be a high-ground stress release result.
The present embodiment is intended to develop a kind of can realize the quick release of deep crustal stress and phase transformation effect production using Transformation Principle
The method for being oriented to presplitting and reducing rock burst of raw hole inner periphery, so as to ensure the safety of its construction safety and staff.Step packet
It includes：
Step 1：Perforation is carried out to rock stratum 100（The diameter of hole is about 90mm-110mm）, drill and put using five figured cloths（Such as Fig. 1
It is shown）, drilling depth is about 4-6m, and pitch of holes is about 1.5-1.7m.
Step 2：U-shaped circulation pipe 2 is inserted into drilling（Using the good copper pipe of conductive performance）With water injection pipe 3（Pipeline it is straight
Diameter is about 25mm-30mm）, the inductance loop 4 on the set of U-shaped 2 bottom of circulation pipe（Put temperature monitoring device and pressure in 4 the inside of inductance loop
Power induction meter）, and stopple beyond the Great Wall.
Step 3：Cold energy is passed to the cooling medium liquid in refrigerant accumulator tank by refrigeration system 10（Anti-icing fluid）, in case the later stage
It uses.
Step 4：From high-pressure hydraulic pump water filling into its interior water injection pipe 3, in the process, the phase transformation occurred due to water（Liquid
Water evaporation）, weaken a part of stress.After hydraulic pressure reaches the pressure value for starting setting in drilling, switch off the pump valve, stops
Only high pressure water injection；
Step 5：Using underground coolant circulating system, the cooling medium liquid in low temperature refrigerant liquid holding vessel 20 is conveyed by cryogenic pump 30
U-shaped circulation pipe 2 into deep-well, while open room temperature cooling medium liquid delivery pump.Due to the decalescence of low temperature refrigerant liquid, brill is taken away
A large amount of thermal energy in hole undergo phase transition the water in 100 gap of rock stratum and become solid ice, and in the process, one side rock stratum 100 is split
Gap further expands, and on the other hand further discharges the high-stress state of deep ground rock, is further reduced the generation of rock burst,
The production efficiency of rock is also increased simultaneously.Step 3 is repeated to step 5, improves stress release value.
Step 6：Temperature and pressure monitoring device is provided at U-shaped 2 bottom of circulation pipe, when temperature, pressure reaches preset value
The delivery pump of low temperature phase change liquid is closed, stops the injection of cooling medium liquid, room temperature cooling medium liquid delivery pump continues to operate, and it is cold to be delivered to room temperature
In matchmaker's liquid holding vessel 20.
Step 7：When temperature stress device shows that 100 stress of bottom hole temperature (BHT) depth formation reaches in safe range, utilize simultaneously
Microseism device 5 detects rock and reaches cracking effect, then stops recycling, while extract U-shaped circulation pipe 2 and water injection pipe 3 out, otherwise continue
Repeat three to five steps.
The present embodiment water, which enters behind gap, to be generated the mechanism of first time stress release and is：1. using advance borehole high-pressure uniform
Water filling can prevent rock burst by three aspect effects：First, strain energy can be discharged, and maximum tangential stress is turned to deep
It moves；Second is that the wedge action of high pressure water injection can soften, reduce rock mass strength；Third, high pressure water injection produces new separation fracture,
And preexisting crack is made to continue extension (drilling punching can make hole wall generate crack), so as to reduce the energy of rock mass storage strain energy
Power.2. due to being coolant system cycle, recycled here using thawing, reach safety value until reaching stress release, just stop
Only recycle.3. being formed around pressure relief vent and unloading trim ring, unload trim ring and be overlapped mutually, relief range increases sharply, and water is in relief range
Hole freeze, melt, generate gap.4. inflow is controlled by pressure sensor, because with water injection rate during high pressure water injection
Increase, pressure becomes larger, but must in safe range, otherwise the generation of rock burst can be promoted（Since adjacent pitch of holes is
0.5 meter to 1 meter, the covering wide scope in a hole is exactly 25 centimetres）.
2 vertical section of U-shaped circulation pipe of the present embodiment can make helical disk tubulose, and helical disk tubulose can give full play to cold coal
Cold energy effect, while U-shaped circulation pipe 2 is preferably close to side wall setting；A diameter of 90 mm- of two spiral cross sectioned bores
110mm。
Generally there are two types of situations for stress release：（1）First, at the position of stress concentration, such as broken end and crossover sites
Etc. deform upon or destroy, lead to stress release.Second, improve country rock physical and mechanical property.In face (excavation face) and
Hole wall often sprays cold water, can reduce surface layer Surrounding Rock Strength to a certain extent.The not regional rock matter phase transformation of stress concentration, rock
Stone change in mechanics or other reasons cause strength reduction, also can deform upon or destroy, cause stress release.Above-mentioned two
Kind situation is also two essential conditions of Instability of Rock Body.（2）Country rock water spray softening after, hole week principal compressive stress peak value be obviously reduced,
Principal tensile stress value also accordingly reduces, and rock burst plague grade level is substantially reduced.
The principle that water freezing second discharges stress is：Water freezing in rock crevice, volume expansion produce rock stratum 100
Raw crack, rock mass damage, stress release；Ice-out Cheng Shuihou third time release stress principle be：Ice-out forms water, will
Reduce Surrounding Rock Strength.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, several simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (7)
1. a kind of deep ground high-ground stress release structure, which is characterized in that including：Multiple stress relief holes（1）, each stress
Release aperture（1）The interior U-shaped circulation pipe for being equipped with recyclable cooling medium liquid（2）, each stress relief hole（1）Opening be equipped with
Sealing-plug, is equipped at the center of the sealing-plug and stress relief hole（1）The water injection pipe of connection（3）, the water injection pipe（3）Water is drawn
It flow to stress relief hole（1）Inner cavity, and cause water from inner cavity penetrate into rock stratum（100）In crack；
The U-shaped circulation pipe（2）Two free ends be pierced by sealing-plug after connect with refrigerant holding vessel.
2. high-ground stress release structure in deep ground as described in claim 1, which is characterized in that the stress relief hole（1）Hole
Diameter be 90mm ~ 110mm, the stress relief hole（1）Hole depth for 5m ~ 7m, two neighboring stress relief hole（1）Pitch of holes
For 0.5m ~ 1m.
3. high-ground stress release structure in deep ground as claimed in claim 1 or 2, which is characterized in that the U-shaped circulation pipe（2）'s
The peripheral wall of arc pipeline section is equipped with hollow inductance loop（4）, the inductance loop（4）Inner cavity be equipped with temperature sensor and pressure sensitive
Meter, the temperature sensor and the accrued sensing head of feeling of stress are pierced by inductance loop（4）, to realize to the real-time of coolant-temperature gage and pressure
Acquisition；
The temperature sensor and the accrued output terminal of feeling of stress are connect with control system.
4. high-ground stress release structure in deep ground as described in claim 1, which is characterized in that the U-shaped circulation pipe（2）It is vertical
Pipeline section be spiral coil structure, the U-shaped circulation pipe（2）For copper pipe.
5. a kind of method that the high-ground stress release of presplitting realization deep ground is oriented to based on phase transformation, is included the following steps：
Step 1: using drill jumbo to rock stratum（100）Open up multiple stress relief holes（1）；
Step 2: to each stress relief hole（1）It is interior to be inserted into U-shaped circulation pipe（2）And water injection pipe（3）, in stress relief hole（1）'s
Opening installs sealing-plug, and makes U-shaped circulation pipe（2）And water injection pipe（3）Free end be pierced by sealing-plug；
Step 3: using high-pressure hydraulic pump to the water injection pipe of step 2（3）Interior water filling, water injection pipe（3）Water is drained to stress release
Hole（1）Inner cavity, and cause water seif-citing rate release aperture（1）Inner cavity penetrate into rock stratum（100）First time high-ground stress is completed in crack
Release；
Step 4: by circulation pipe U-shaped in step 2（2）Free end connect with refrigerant holding vessel, refrigeration system（10）Cold energy
Being transferred to storage has the refrigerant holding vessel of cooling medium liquid, and cooling medium liquid is delivered to U-shaped circulation pipe by cryogenic pump（2）, after water freezing
Cause rock stratum（100）Fracture propagation completes the release of second of high low stress；
Step 5: closing the cryogenic pump in step 4, ice-out Cheng Shui completes the release of third time high-ground stress.
6. the method for presplitting realization deep ground high-ground stress release is oriented to based on phase transformation as claimed in claim 5, which is characterized in that
It further includes Step 6: not up to safety value after the release of third time high-ground stress in the step 5, repeats step 4 and step 5,
To stress relief hole（1）Interior water carries out thawing cycle, until reaching the safety value of high-ground stress release.
7. such as the method described in claim 5 or 6 that the high-ground stress release of presplitting realization deep ground is oriented to based on phase transformation, feature exists
In further including step a between the step 1 and step 2, in inductance loop（4）Peripheral wall on open up it is multiple for sensing heads stretch out
Through-hole, the inductance loop（4）To be equipped with temperature sensor, feeling of stress accrued for inner cavity, then by inductance loop（4）It is installed in U-shaped
Circulation pipe（2）Arc pipeline section peripheral wall on, with realize to stress relief hole（1）The real-time acquisition of the temperature, pressure of interior water.
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