CN106150507A - 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
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- CN106150507A CN106150507A CN201610500132.XA CN201610500132A CN106150507A CN 106150507 A CN106150507 A CN 106150507A CN 201610500132 A CN201610500132 A CN 201610500132A CN 106150507 A CN106150507 A CN 106150507A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000243 solution Substances 0.000 claims abstract description 22
- 238000011161 development Methods 0.000 claims abstract description 20
- 239000000126 substance Substances 0.000 claims abstract description 19
- 238000005422 blasting Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 29
- 239000003814 drug Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 31
- 238000004880 explosion Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000005641 tunneling Effects 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract 1
- 230000018109 developmental process Effects 0.000 description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000003245 coal Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 108010022579 ATP dependent 26S protease Proteins 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- 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 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
A kind of method in hydrofracturing segment blast speedy drivage tunnel, described method is to hole on advance development face, offer several wedge shape annular grooves in the borehole, high-pressure hydraulic pump is connected by water injection hole packer, from successively wedge shape annular groove being carried out presplitting at the bottom of hole, then to using stemming sealing of hole after arranging borehole charge in prismatic, connecting blasting network and carrying out executing quick-fried, chemical solution is injected again, it is achieved speedy drivage to boring.The crack that this method hydrofracturing produces is that explosion provides a lot of scope of freedom, make cranny development more abundant, further inject into chemical solution and rock effect, the mechanical strength making rock significantly reduces, further speed up the driving speed of development machine, in tunneling process, reduce dust simultaneously, and simple to operate, remarkable in economical benefits.
Description
Technical field
The present invention relates under a kind of mine the method for tunnel speedy drivage in hard rock, specifically a kind of hydrofracturing segmentation is quick-fried
The method in broken speedy drivage tunnel.
Background technology
In underground rock engineering, either tunneling or coal mining, need the most all the time constantly to dig lane
Road is to meet all kinds of technological requirement.The driving speed in tunnel directly affects the high-yield and high-efficiency of rock mass engineering project and runs.But current
Under form, the driving of rock gangway is generally adopted by drilling and blasting method；And in half rock gangway and coal road, it is generally adopted by the pick of development machine
The method entered.In recent years along with the development in colliery, what the application of smooth Surface Blasting Technology and high-power development machine have also been obtained sends out
Exhibition.But, the intensity of rock is difficult to greatly isolate the principal element being still restriction tunnel speedy drivage.Along with underground in recent years
The development of engineering, tunnelling technology has obtained the biggest development.Zhou Guiquan is in paper " coal mine roadway speedy drivage borehole blasting side
The optimization design of case " in, require and measure by analyzing site operation technology, propose optimize the scheme of design and solve certain
Driving problem.Liao Shanghua passes through on-site actual situations at paper " method of coal mine roadway speedy drivage ".Tunnel is quickly dug
The method entering aspect is summed up, and it predominantly improves management construction and technology two parts.Most rock mass engineering projects all concentrate on
Improve heading equipment intensity, optimize on the aided processes such as blasting scheme, piercing technique does not has big improvement.
For above-mentioned situation, prior art can not solve the problem that down-hole is complicated to a certain extent, even affects tunnel
The speed of driving.Therefore, in order to overcome above deficiency, a kind of hydrofracturing segment blast speedy drivage tunnel is proposed here
Method, can make full use of spy water hole, and technique is simple, and speedy drivage is effective.
Summary of the invention
Present invention aim to address under existence conditions, under mine, tunnelling speed is slow, inefficient problem, and provides
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, described method follows these steps to carry out:
(1) boring 5 borings paralleled with development end direction on advance development face, wherein four borings are to arrange in prismatic,
One boring is positioned at prismatic centre position, and by offering several cambridge rings at the bottom of the hole holed successively to aperture in described boring
Groove, each wedge shape annular groove is at intervals；
(2) water injection hole packer is communicated in high-voltage tube and high-pressure hydraulic pump thereof, the most each wedge shape annular groove is carried out by the bottom of hole
Presplitting, during high pressure presplitting, will monitor hydraulic pressure in real time；
(3) to described four the hole powder charges arranged in prismatic, the number of plies of described powder charge is equal with the number of wedge shape annular groove, described dress
The position of medicine is in the centre position of wedge shape annular groove described in any two, and the step of described powder charge is to be sent into by powder stick in hole closely
Be connected, after be re-fed into stemming compacting, complete the powder charge of ground floor, repeat above step, until all of boring is filled, complete
Become after powder charge, carry out sealing of hole with stemming, connect blasting network, use millisecond blasting to carry out executing quick-fried；
(4) corresponding chemical solution is injected to middle boring, it is achieved speedy drivage tunnel.
The method in above-mentioned the provided a kind of hydrofracturing segment blast speedy drivage tunnel of the present invention, cloth in development end
Putting five borings presenting prismatic, one of them boring is arranged in the position of centre.Then in all of boring, several are opened
Wedge shape annular groove, horizontal high voltage water filling of going forward side by side.Utilize water pressure stress concentration effect in wedge shape annular groove, destroy its integrity, make
Obtain big cranny development.Carrying out horizontal fragmentation explosion after hydrofracturing, the series of problems brought in order to avoid explosion uses milli
Second blasting method.The crack of hydrofracturing is not only further expanded by segment blast, and produces new crack.Explosion completes
After, suitable for pre-trial chemical liquid is injected into country rock from middle boring, chemical liquid weakens with the effect of country rock
The mechanical strength of country rock.Chemical method is combined by this method effectively with physical method, overcomes what prior art existed
Deficiency, effectively utilizes cover hole to carry out hydrofracturing and produces crack, provide a lot of scope of freedoms for ensuing blast, make
The mechanical strength of rock significantly reduces, and has further speeded up the driving speed of development machine, reduces powder in tunneling process simultaneously
Dirt, and simple to operate, remarkable in economical benefits, there are good promotion and application and be worth.
Accompanying drawing explanation
Fig. 1 is this programme plane of arrangement schematic diagram.
Fig. 2 be this method planar structure right view is set.
In figure: 1, development end；2, boring；3, liquid injection hole.
Detailed description of the invention
Below the detailed description of the invention of the present invention is further illustrated.
The method implementing above-mentioned the provided a kind of hydrofracturing segment blast speedy drivage tunnel of the present invention, specifically includes
Following step.
One, utilizing water exploring drill 5 boring on advance development face, parallels with development end in the direction of boring；Four, outside
The arrangement of boring presents prismatic and arranges, last hole is positioned at prismatic intermediate arrangement.It is left that the degree of depth of boring is generally 40m
The right side, on the other hand on the one hand boring can carry out follow-up work with the situation of forward probe water.
Two, in all borings, utilize fluting to bore and open several wedge shape annular grooves successively to aperture, often from the bottom of the hole of boring
Individual wedge shape annular groove is separated by 5 9m.Fluting bores through using in a lot of mining areas, and its 26S Proteasome Structure and Function and operational circumstances thereof are to this neck
Known to the technical staff in territory is.
Three, pressure duct is connected with water injection hole packer, then high-pressure hydraulic pump is connected on pressure duct.From at the bottom of hole
The most each wedge shape annular groove is carried out presplitting.The fracturing time of each wedge shape annular groove between 100 120s, the pressure of fracturing
Power peak value is at 40 50Mpa, during high pressure presplitting, will monitor it in real time.
Four, four holes of outside being carried out powder charge, the number of plies of powder charge is equal with the number of wedge shape annular groove, but is to ensure that
Powder stick is placed on the centre position of any two wedge shape annular groove, and the step of powder charge is sent into powder stick in hole gently, it is ensured that between powder stick
It is in close contact, is re-fed into stemming afterwards, is compacted gently with wooden stick, complete the powder charge of ground floor, repeat above step, directly
To all of boring is filled.After completing powder charge, carry out sealing of hole with stemming, connect blasting network and use millisecond blasting to execute
Quick-fried.
Five, the country rock to driving face is sampled test, according to the Experimental Procedures of standard, measure rock sample list
Each parameter of axle comprcssive strength, triaxial shear strength, porosity and water penetration.X-ray diffractometer is used to be measured country rock
Main mineral constituent.Main chemical compositions according to rock carries out selecting corresponding chemical solution.Measure within the identical time,
The solution of variable concentrations is to country rock uniaxial compressive strength and the affecting laws of triaxial shear strength.Measure the condition in same concentrations
Under, the different time periods, to country rock uniaxial compressive strength and the affecting laws of triaxial shear strength, determines solution through over-fitting
Optimal concentration.
Six, according to the effect of the relevant parameters such as porosity, water absorption and the permeability of country rock and extender fracturing determine to
The amount of liquid injected in hole and fluid injection time.
Seven, showing according to many result of the tests, the main chemical compositions of most country rock is SiO2, constitute about total amount
More than 50%, it may be determined that its chemical reagent is NaOH solution.Fitting result through step 5 may finally determine chemical liquids
The approximate range of bulk concentration is the solution of 0.3%-0.5%, and soak time was at about 7-10 days.
May determine that the uniaxial compressive strength of country rock with the rule in chemical solution response time is further:
δ= -aln(t)+ δ0+Δ
δ is the uniaxial compressive strength after country rock and chemical solution effect, and a is fitting coefficient, and t is the action time of chemical solution, δ
0 is the natural uniaxial compressive strength of country rock, and Δ is correction factor.
Eight, chemical solution NaOH solution is injected to middle boring, it is achieved speedy drivage tunnel.
In order to make objects and advantages of the present invention become apparent from, implement for ore deposit, Shanxi Province, burying of this pit coal layer
Deep is about 450m, and the intensity of country rock is higher, and globality is preferable, uses this method to carry out enforcement as follows:
Step one, utilizing water exploring drill 5 boring on advance development face, parallels with development end in the direction of boring；Four, outside
The arrangement of boring presents prismatic and arranges, last hole is positioned at prismatic intermediate arrangement, and the degree of depth of boring is 40m.
Step 2, in all borings, utilize fluting bore from boring hole at the bottom of opens several cambridge rings successively to aperture
Groove, each wedge shape annular groove is separated by 8m, is connected with water injection hole packer by pressure duct, then high-pressure hydraulic pump is connected on pressure duct
On, from each wedge shape annular groove carries out at the bottom of hole presplitting the most one by one, the fracturing time of each wedge shape annular groove is 120s, the pressure of fracturing
Power peak value is 50Mpa, during high pressure presplitting, will monitor it in real time.
Step 3, four holes to outside carry out powder charge, and the number of plies of powder charge is equal with the number of wedge shape annular groove, but is intended to
Ensureing that powder stick is placed on the centre position of any two wedge shape annular groove, the step of powder charge is sent into powder stick in hole gently, it is ensured that powder stick
Between to be in close contact, be re-fed into stemming afterwards, be compacted gently with wooden stick, complete the powder charge of ground floor, repeat above step
Suddenly, until all of boring is filled.After completing powder charge, carry out sealing of hole with stemming, connect blasting network and use millisecond blasting to enter
Row is executed quick-fried.
Step 4, country rock to driving face are sampled test, according to the Experimental Procedures of standard, measure rock sample
Uniaxial compressive strength is 54.48MPa, porosity is 2.32%, water absorption 2.68%；X-ray diffractometer is used to be measured country rock
Main mineral constituent be SiO2, account for about the 50% of total amount, determine the optimal concentration 0.5% of solution through test matching repeatedly
NaOH solution, soak time is optimal at one week.
May determine that the uniaxial compressive strength of country rock with the rule in chemical solution response time is further:
δ= -aln(t)+ δ0+Δ
δ is the uniaxial compressive strength after country rock and chemical solution effect, and a is fitting coefficient, and t is the action time of chemical solution, δ
0 is the natural uniaxial compressive strength of country rock, takes 54.48MPa at this, and Δ is correction factor.
Step 5, inject chemical solution NaOH solution to middle boring, it is achieved speedy drivage tunnel.
Claims (1)
1. the method in hydrofracturing segment blast speedy drivage tunnel, described method follows these steps to carry out:
(1) boring 5 borings paralleled with development end direction on advance development face, wherein four borings are to arrange in prismatic,
One boring is positioned at prismatic centre position, and by offering several cambridge rings at the bottom of the hole holed successively to aperture in described boring
Groove, each wedge shape annular groove is at intervals；
(2) water injection hole packer is communicated in high-voltage tube and high-pressure hydraulic pump thereof, the most each wedge shape annular groove is carried out by the bottom of hole
Presplitting, during high pressure presplitting, will monitor hydraulic pressure in real time；
(3) to described four the hole powder charges arranged in prismatic, the number of plies of described powder charge is equal with the number of wedge shape annular groove, described dress
The position of medicine is in the centre position of wedge shape annular groove described in any two, and the step of described powder charge is to be sent into by powder stick in hole closely
Be connected, after be re-fed into stemming compacting, complete the powder charge of ground floor, repeat above step, until all of boring is filled, complete
Become after powder charge, carry out sealing of hole with stemming, connect blasting network, use millisecond blasting to carry out executing quick-fried；
(4) corresponding chemical solution is injected to middle boring, it is achieved speedy drivage tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610500132.XA CN106150507B (en) | 2016-06-30 | 2016-06-30 | A kind of method in hydrofracturing segment blast speedy drivage tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610500132.XA CN106150507B (en) | 2016-06-30 | 2016-06-30 | A kind of method in hydrofracturing segment blast speedy drivage tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106150507A true CN106150507A (en) | 2016-11-23 |
| CN106150507B CN106150507B (en) | 2019-02-26 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610500132.XA Expired - Fee Related CN106150507B (en) | 2016-06-30 | 2016-06-30 | A kind of method in hydrofracturing segment blast speedy drivage tunnel |
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| CN (1) | CN106150507B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106988756A (en) * | 2017-05-27 | 2017-07-28 | 中国铁建重工集团有限公司 | A kind of broken rock device and method |
| CN107083967A (en) * | 2017-06-20 | 2017-08-22 | 武汉大学 | The method and system of extremely hard rock are tunneled using hydraulic fracturing technology liaison tunnel development machine |
| 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 |
| 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 |
| 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 |
| CN112943279A (en) * | 2021-01-28 | 2021-06-11 | 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 |
| CN112946781A (en) * | 2021-02-08 | 2021-06-11 | 中国矿业大学 | Advanced water exploration method after water-containing fractured rock stratum reconstruction |
| CN113279763A (en) * | 2020-12-15 | 2021-08-20 | 重庆工程职业技术学院 | Full-water-pressure energy-gathering blasting shock reduction and energy saving control method, system, terminal and medium |
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| CN101975066A (en) * | 2010-10-09 | 2011-02-16 | 河南省煤层气开发利用有限公司 | Coal-rock drift quick tunnelling method |
| CN102678117A (en) * | 2012-05-28 | 2012-09-19 | 中国矿业大学 | Directional hydraulic fracturing method based on energizing blasting |
| CN102878876A (en) * | 2012-10-08 | 2013-01-16 | 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 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106988756A (en) * | 2017-05-27 | 2017-07-28 | 中国铁建重工集团有限公司 | A kind of broken rock device and method |
| 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 |
| CN107083967A (en) * | 2017-06-20 | 2017-08-22 | 武汉大学 | The method and system of extremely hard rock are tunneled using hydraulic fracturing technology liaison tunnel development machine |
| 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 |
| CN113279763A (en) * | 2020-12-15 | 2021-08-20 | 重庆工程职业技术学院 | Full-water-pressure energy-gathering blasting shock reduction and energy saving control method, system, terminal and medium |
| 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 |
| CN112943279A (en) * | 2021-01-28 | 2021-06-11 | 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 |
| CN112946781A (en) * | 2021-02-08 | 2021-06-11 | 中国矿业大学 | Advanced water exploration method after water-containing fractured rock stratum reconstruction |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106150507B (en) | 2019-02-26 |
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