CN106150507B - A kind of method in hydrofracturing segment blast speedy drivage tunnel - Google Patents
A kind of method in hydrofracturing segment blast speedy drivage tunnel Download PDFInfo
- Publication number
- CN106150507B CN106150507B CN201610500132.XA CN201610500132A CN106150507B CN 106150507 B CN106150507 B CN 106150507B CN 201610500132 A CN201610500132 A CN 201610500132A CN 106150507 B CN106150507 B CN 106150507B
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- CN
- China
- Prior art keywords
- hard rock
- hole
- hydrofracturing
- chemical solution
- drilling
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/10—Making by using boring or cutting machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
Abstract
A kind of method in hydrofracturing segment blast speedy drivage tunnel, the method is drilled on advance development face, several wedge-shaped annular grooves are opened up in the borehole, high-pressure hydraulic pump is connected to by water injection hole packer, presplitting successively is carried out to wedge-shaped annular groove from bottom hole, then in stemming sealing of hole is used after prismatic setting borehole charge, connection blasting network apply quick-fried, chemical solution is injected to drilling again, realizes speedy drivage.The crack that this method hydrofracturing generates provides many scope of freedoms for explosion, so that cranny development is more abundant, it further injects into chemical solution and rock acts on, making the mechanical strength of rock significantly reduces, the driving speed of development machine is further speeded up, dust is reduced in tunneling process simultaneously, and easy to operate, remarkable in economical benefits.
Description
Technical field
The present invention relates to the method for tunnel speedy drivage in hard rock under a kind of mine, specifically a kind of hydrofracturing segmentation is quick-fried
The method in broken speedy drivage tunnel.
Background technique
In underground rock engineering, either tunneling or coal mining all needs constantly to dig lane always
Road is to meet all kinds of technique requirements.The driving speed in tunnel directly affects the high-yield and high-efficiency operation of rock mass engineering project.But current
Under form, the driving of rock gangway is generally adopted by drilling and blasting method；And the pick of development machine is generally adopted by half rock gangway and coal road
Into method.In recent years with the development of coal mine, the application of smooth Surface Blasting Technology and high-power development machine has also obtained good hair
Exhibition.But it is still a principal element for restricting tunnel speedy drivage that the intensity of rock, which is difficult to isolate greatly,.With underground in recent years
The development of engineering, tunnelling technology have been greatly developed.Zhou Guiquan is in paper " coal mine roadway speedy drivage borehole blasting side
The optimization design of case " in, by analysis site operation technical requirements and measure, proposes the scheme of optimization design and solve certain
Driving problem.Liao Shanghua passes through on-site actual situations in paper " method of coal mine roadway speedy drivage ".Tunnel is quickly dug
Method into aspect is summarized, and management construction and technology two parts are predominantly improved.Most rock mass engineering projects all concentrate on
Heading equipment intensity is improved, optimizes in the auxiliary processes such as blasting scheme, does not have big improvement on piercing technique.
For above situation, the prior art not can solve the problem of underground complexity to a certain extent, or even influence tunnel
The speed of driving.Therefore, above in order to overcome the shortcomings of, a kind of hydrofracturing segment blast speedy drivage tunnel is proposed here
Method can make full use of and visit water hole, simple process, and speedy drivage effect is good.
Summary of the invention
The problem of present invention aim to address under existence conditions, tunnelling speed is slow under mine, low efficiency, and provide
A kind of method in hydrofracturing segment blast speedy drivage tunnel.
The present invention is achieved by the following technical solutions.
A kind of method in hydrofracturing segment blast speedy drivage tunnel, the method follow these steps to carry out:
(1) 5 drillings parallel with development end direction are bored on advance development face, wherein four drillings are set in prismatic
It sets, a drilling is located at prismatic middle position, and successively opens up several wedges to aperture from the bottom hole to drill in the drilling
Shape annular groove, each wedge shape annular groove is at intervals；
(2) water injection hole packer is connected to high-voltage tube and its high-pressure hydraulic pump, by bottom hole successively one by one by each wedge-shaped annular groove
Presplitting is carried out, during high pressure presplitting, real-time monitoring is carried out to hydraulic pressure；
(3) to four hole powder charges in prismatic setting, the number of plies of the powder charge is equal with the wedge-shaped number of annular groove, institute
The step of position for stating powder charge is the middle position of the wedge shape annular groove described in any two, the powder charge is that powder stick is sent into hole
It is closely coupled, after be re-fed into stemming compacting, complete the powder charge of first layer, repeat above step, until all drilling is filled
It is full, after completing powder charge, sealing of hole is carried out with stemming, blasting network is connected, apply using millisecond blasting quick-fried；
(4) corresponding chemical solution is injected to intermediate drilling, realizes speedy drivage tunnel.
A kind of method in hydrofracturing segment blast speedy drivage tunnel provided by the present invention is above-mentioned, the cloth in development end
The drilling of five presentation prismatics is set, one of drilling is arranged in intermediate position.Then several are opened in all drilling
Wedge-shaped annular groove, horizontal high voltage of going forward side by side water filling.It is acted on using stress concentration of the water pressure in wedge-shaped annular groove, destroys its integrality, make
Obtain big cranny development.Horizontal fragmentation explosion is carried out after hydrofracturing, in order to avoid explosion bring a series of problems is using milli
Second blasting method.Segment blast not only further expands the crack of hydrofracturing, but also generates new crack.Explosion is completed
Afterwards, the suitable chemical liquid of pre-trial is injected into country rock from intermediate drilling, the effect reduction of chemical liquid and country rock
The mechanical strength of country rock.This method effectively combines chemical method with physical method, overcomes of the existing technology
Deficiency, effective use cover hole carry out hydrofracturing and generate crack, many scope of freedoms are provided for ensuing blast, are made
The mechanical strength of rock significantly reduces, and has further speeded up the driving speed of development machine, while powder is reduced in tunneling process
Dirt, and easy to operate, remarkable in economical benefits have good promotion and application value.
Detailed description of the invention
Fig. 1 is this programme plane of arrangement schematic diagram.
Fig. 2 is the setting planar structure right view of this method.
In figure: 1, development end；2, it drills；3, liquid injection hole.
Specific embodiment
A specific embodiment of the invention is further illustrated below.
Implement the above-mentioned a kind of provided method in hydrofracturing segment blast speedy drivage tunnel of the present invention, specifically includes
Following steps.
One, using water exploring drill 5 drillings on advance development face, the direction of drilling is parallel with development end；Outside four
Prismatic arrangement is presented in the arrangement of drilling, the last one hole is located at prismatic intermediate arrangement.The depth of drilling is generally the left side 40m
The case where right side, drilling on the one hand can be with forward probe water, it on the other hand can carry out subsequent work.
Two, it in all drillings, is bored using fluting from the bottom hole of drilling and successively opens several wedge-shaped annular grooves to aperture, often
A wedge shape annular groove is separated by 5-9m.Fluting is bored to have passed through and be used in many mining areas, and structure and function and its operational circumstances are to the neck
The technical staff in domain is well known.
Three, pressure duct is connected with water injection hole packer, then connects high-pressure hydraulic pump on pressure duct.From bottom hole
Each wedge-shaped annular groove is successively subjected to presplitting one by one.It is each wedge shape annular groove the fracturing time between 100-120s, the pressure of fracturing
Power peak value is in 40-50Mpa, during high pressure presplitting, to carry out real-time monitoring to it.
Four, powder charge is carried out to four holes of outside, the number of plies of powder charge is equal with the wedge-shaped number of annular groove, but is to ensure that
The step of powder stick is placed on the middle position of any two wedge shape annular groove, powder charge is gently sent into powder stick in hole, guarantees between powder stick
Be in close contact, be re-fed into stemming later, be gently compacted with wooden stick, complete the powder charge of first layer, repeat more than step, directly
Extremely all drilling is filled.After completing powder charge, sealing of hole is carried out with stemming, connection blasting network is applied using millisecond blasting
It is quick-fried.
Five, test is sampled to the country rock of driving face, according to the Experimental Procedures of standard, measures the list of rock sample
Axis compression strength, triaxial shear strength, porosity and water penetration each parameter.Country rock is measured using X-ray diffractometer
Main mineral constituent.It is carried out selecting corresponding chemical solution according to the main chemical compositions of rock.In measurement at the same time,
Affecting laws of the solution of various concentration to country rock uniaxial compressive strength and triaxial shear strength.Measure the condition in same concentrations
Under, the different periods to the affecting laws of country rock uniaxial compressive strength and triaxial shear strength, determines solution through over-fitting
Optimal concentration.
Six, according to the effect of the relevant parameters such as the porosity of country rock, water imbibition and permeability and swelling agent fracturing determine to
The amount of liquid injected in hole and fluid injection time.
Seven, show that the main chemical compositions of most of country rock are SiO according to many test results2, account about total amount
50% or more, can determine its chemical reagent be NaOH solution.Fitting result by step 5 may finally determine chemical liquids
The approximate range of bulk concentration is the solution of 0.3%-0.5%, and soaking time was at 7-10 days or so.
It may further determine the uniaxial compressive strength of country rock and the rule in chemical solution reaction time are as follows:
δ= -aln(t)+ δ0+Δ
δ is the uniaxial compressive strength after country rock and chemical solution effect, and a is fitting coefficient, when t is the effect of chemical solution
Between, δ 0 is the natural uniaxial compressive strength of country rock, and Δ is correction factor.
Eight, chemical solution NaOH solution is injected to intermediate drilling, realizes speedy drivage tunnel.
In order to be more clear objects and advantages of the present invention, implemented for Shanxi Province's mine, which buries
Depth is 450m or so, and the intensity of country rock is higher, and globality is preferable, implement using this method as follows:
Step 1: using water exploring drill 5 drillings on advance development face, the direction of drilling is parallel with development end；Outside
Prismatic arrangement is presented in the arrangement of four drilling, the last one hole is located at prismatic intermediate arrangement, and the depth of drilling is 40m.
Step 2: being bored using fluting from the bottom hole of drilling in all drillings and successively opening several cambridge rings to aperture
Slot, each wedge shape annular groove are separated by 8m, pressure duct are connected with water injection hole packer, then connects high-pressure hydraulic pump in pressure duct
On, each wedge-shaped annular groove is successively subjected to presplitting one by one from bottom hole, the fracturing time of each wedge shape annular groove is 120s, the pressure of fracturing
Power peak value is that 50Mpa will carry out real-time monitoring to it during high pressure presplitting.
Step 3: carrying out powder charge to four holes of outside, the number of plies of powder charge is equal with the wedge-shaped number of annular groove, but wants
Guarantee that powder stick is placed on the middle position of any two wedge shape annular groove, the step of powder charge is gently sent into powder stick in hole, guarantees powder stick
Between to be in close contact, be re-fed into stemming later, be gently compacted with wooden stick, complete the powder charge of first layer, repeat above step
Suddenly, until all drilling is filled.After completing powder charge, carries out sealing of hole with stemming, connection blasting network use millisecond blasting into
Row is applied quick-fried.
Step 4: being sampled test to the country rock of driving face, according to the Experimental Procedures of standard, rock sample is measured
Uniaxial compressive strength is 54.48MPa, porosity 2.32%, water imbibition 2.68%；Country rock is measured using X-ray diffractometer
Main mineral constituent be SiO2, 50% of total amount or so is accounted for, the optimal concentration 0.5% for determining solution is fitted by multiple test
NaOH solution, soaking time is best at one week.
It may further determine the uniaxial compressive strength of country rock and the rule in chemical solution reaction time are as follows:
δ= -aln(t)+ δ0+Δ
δ is the uniaxial compressive strength after country rock and chemical solution effect, and a is fitting coefficient, when t is the effect of chemical solution
Between, δ 0 is the natural uniaxial compressive strength of country rock, takes 54.48MPa at this, Δ is correction factor.
Step 5: injecting chemical solution NaOH solution to intermediate drilling, speedy drivage tunnel is realized.
Claims (1)
1. a kind of method in hydrofracturing segment blast speedy drivage tunnel, the method follows these steps to carry out:
(1) 5 drillings parallel with development end direction are bored on advance development face, wherein four drillings are arranged in prismatic,
One drilling is located at prismatic middle position, and successively opens up several cambridge rings to aperture from the bottom hole to drill in the drilling
Slot, each wedge shape annular groove is at intervals；By laboratory test determine the mineral characteristic of hard rock, physico-mechanical properties,
Chemical tendering characteristic determines that hard rock softens optimal solution and concentration, reservoir quantity and fluid injection time parameter；
(2) water injection hole packer is connected to high-voltage tube and its high-pressure hydraulic pump, successively each wedge-shaped annular groove is implemented to retreat by bottom hole
Formula is segmented hydrofracturing, and pressure peak 40-50MPa, fracturing time are 100-120s, be to water during high pressure presplitting
Pressure carries out real-time monitoring；
(3) to four hole powder charges in prismatic setting, the number of plies of powder charge is equal with the wedge-shaped number of annular groove, the position of powder charge
The middle position of the wedge shape annular groove described in any two, the step of powder charge be will powder stick be sent into it is closely coupled in hole, after give again
Enter stemming compacting, complete the powder charge of first layer, repeat above step, until all drilling is filled, after completing powder charge, uses
Stemming carries out sealing of hole, connects blasting network, apply using millisecond blasting quick-fried；
(4) chemical solution is injected to intermediate drilling, realizes speedy drivage tunnel；
(5) with driving face be advanced to the default presplitting set apart from when, repeat the above steps, continue to carry out hard rock pre-
It splits, it is ensured that development machine being capable of normal, stable cutting；
The mineral characteristic includes physical and chemical composition, mineral composition and the content of hard rock；Physics classroom teaching includes hard rock
Uniaxial compressive strength, triaxial shear strength, porosity, permeability, water imbibition and water penetration；
The chemical tendering characteristic can be reacted with the hard rock according to hard rock mineral characteristic and physics classroom teaching, selection
Chemical solution utilizes the SiO in chemical solution and hard rock2Chemical reaction softening hard rock occurs for mineral；On the basis of softening test,
Chemical solution, the bating effect under different role time conditions for analyzing various concentration and type, determine optimal through over-fitting
Chemical solution, concentration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610500132.XA CN106150507B (en) | 2016-06-30 | 2016-06-30 | A kind of method in hydrofracturing segment blast speedy drivage tunnel |
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| CN201610500132.XA CN106150507B (en) | 2016-06-30 | 2016-06-30 | A kind of method in hydrofracturing segment blast speedy drivage tunnel |
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| CN106150507A CN106150507A (en) | 2016-11-23 |
| CN106150507B true CN106150507B (en) | 2019-02-26 |
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| CN106988756B (en) * | 2017-05-27 | 2024-01-19 | 中国铁建重工集团股份有限公司 | Rock breaking device and method |
| CN107083967B (en) * | 2017-06-20 | 2023-06-27 | 武汉大学 | Method and system for assisting tunnel boring machine in tunneling extremely hard rock by utilizing hydraulic fracturing technology |
| CN107387086A (en) * | 2017-08-17 | 2017-11-24 | 东北大学 | A kind of surface mining method |
| CN109372509A (en) * | 2018-11-16 | 2019-02-22 | 西北矿冶研究院 | Arrangement method for double-hollow-hole rhombic cut holes in access filling mining |
| CN111075422A (en) * | 2020-02-05 | 2020-04-28 | 山东科技大学 | Blasting method utilizing hydraulic fracturing |
| CN111664763A (en) * | 2020-05-08 | 2020-09-15 | 安徽理工大学 | Slitting blasting method based on pre-cutting of cutting seams and bottom reinforced throwing |
| CN111578798A (en) * | 2020-05-08 | 2020-08-25 | 安徽理工大学 | Undercutting blasting method based on energy-gathering pre-cutting and bottom strengthening throwing |
| CN113279763B (en) * | 2020-12-15 | 2023-12-19 | 重庆工程职业技术学院 | Full-hydraulic energy-gathering blasting vibration reduction and energy-saving control method, system, terminal and medium |
| CN112943279B (en) * | 2021-01-28 | 2023-06-02 | 中国建筑一局(集团)有限公司 | Construction method for tunneling hard rock roadway by adopting hydraulic fracturing and directional blasting |
| CN112946781B (en) * | 2021-02-08 | 2023-02-28 | 中国矿业大学 | Advanced water exploration method after water-containing fractured rock stratum reconstruction |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101975066B (en) * | 2010-10-09 | 2013-01-23 | 河南省煤层气开发利用有限公司 | Coal-rock drift quick tunnelling method |
| CN102678117B (en) * | 2012-05-28 | 2014-10-29 | 中国矿业大学 | Directional hydraulic fracturing method based on energizing blasting |
| CN102878876B (en) * | 2012-10-08 | 2014-08-27 | 江西稀有稀土金属钨业集团有限公司 | Mine roadway advancing and undermining method and main blasting parameters |
| CN103206903B (en) * | 2013-04-08 | 2015-03-04 | 中国矿业大学 | Hard roof directional pressurized explosion control method |
| CN103924956B (en) * | 2014-04-29 | 2016-05-25 | 西安科技大学 | A kind of lump coal exploitation Advance presplitting method |
| CN104596375A (en) * | 2015-02-09 | 2015-05-06 | 安徽理工大学 | Fully mechanized excavation construction method for rock roadway |
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Granted publication date: 20190226 Termination date: 20200630 |