CN106593424A - Device and method for while-drilling detection of roadway roof rock Protodyakonov coefficient based on sound level meter - Google Patents
Device and method for while-drilling detection of roadway roof rock Protodyakonov coefficient based on sound level meter Download PDFInfo
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- CN106593424A CN106593424A CN201611101992.2A CN201611101992A CN106593424A CN 106593424 A CN106593424 A CN 106593424A CN 201611101992 A CN201611101992 A CN 201611101992A CN 106593424 A CN106593424 A CN 106593424A
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- 238000005553 drilling Methods 0.000 title claims abstract description 90
- 239000011435 rock Substances 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 title claims abstract description 18
- 239000000523 sample Substances 0.000 claims abstract description 12
- 239000003245 coal Substances 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 6
- 239000000178 monomer Substances 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 7
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000003556 assay Methods 0.000 claims description 3
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 239000004575 stone Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 230000000266 injurious effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/003—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by analysing drilling variables or conditions
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- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses a method for while-drilling detection of the roadway roof rock Protodyakonov coefficient based on a sound level meter. In order to solve the problem of while-drilling detection of the Protodyakonov coefficient, namely an important rock mechanical index influencing a coal mine roadway roof anchorage supporting scheme, a roadway roof is drilled to form drill holes with the diameter being 32-42 mm; a bearing type while-drilling device loaded with a sound lever meter probe is installed on the rear portion of a drill bit; through combination with reading of a scale drill stem, the volume decibel values of the drill holes with different depths are tested in the drilling process; and based on the rock Protodyakonov coefficient (namely from 0.3 to 20) standard library established in a laboratory, the rock Protodyakonov coefficient in the roadway roof drilling range is obtained quickly by comparing the volume values with roadway in-situ rock drilling volume decibel values, harmful noise in the drilling process is converted into a favorable sound source, and the technology of while-drilling detection is achieved. The method is suitable for while-drilling detection of the Protodyakonov coefficients of typical sedimentary beds, including sandstone, shale and mudstone, of coal measure strata. The method has the advantages of being conveniently applied in site, being easy to implement and low in labor intensity, and not influencing normal production.
Description
Technical field
The present invention relates to one kind surveys device and method with probing, belong to the technical field of mine timbering, it is especially suitable
In the back rock based on sound meter of the less geological conditions of coal mine tunnel top board different lithology rock stratum interlayering interplanar distance
Stone Protodyakonov coefficient surveys device and method with probing.
Background technology
Roadway support is a key technology of safe coal exploitation, and roof accident occupying quite in mine disaster
The reason for big ratio, roof accident, does not verify caused supporting intensity in time mainly due to the lithologic character of local top board
Not enough.So, during roadway construction, it is necessary to verify back lithologic character in time, the region to there is roof fall hidden danger is timely
Change support pattern or adjustment supporting parameter, it is ensured that the safety of top board and stable.
The method of detection tunnel local Roof rock feature feature mainly has core sampler method, the wall of a borehole impression method, drilling at present
Wall observational method and geologic radar detection etc..Even if core sampler method is cored to top board with geology rock core drill, according to rock core
Columnar organization, analyze the lithologic character of top board, but the build of geological drilling rig is larger, is not suitable for using in driving face, no
Can be used with the driving of development machine whenever and wherever possible；The wall of a borehole impression method is the plasticity material without mobility and elasticity using some
Material, is fitted on boring surface, the in-profile of tested drilling is copied into mould, then measure die, so as to evaluate tested brill
The internal structure in hole, but which cannot determine the lithologic character of top board, it is impossible to and the design to support pattern provides scientific and effective
Data；The wall of a borehole observational method is with equipment such as rock stratum detection recorders, under directly shot by bore inner scene
Come, but receive underground coal mine environmental effect, this method is low due to the precision spied on, the roof rock structural parameters error of acquisition compared with
Greatly；Geologic radar detection is that the electrical property difference based on visited medium is accurately differentiated to different medium separating surface in roof strata
And the electromagnetic technique for positioning, this method to joint, cranny development announcement degree not enough, can not effectively recognize that tunnel is pushed up
The lithologic character of slate layer, and this exactly roadway support design construction in emphasis and difficult point.Therefore, for coal mine roof plate rock stratum
Characteristics of combination, need badly and work out a kind of side that can adapt to underground coal mine environment and can quickly be recognized Roof rock feature feature
Method.
The content of the invention
Technical problem：For above-mentioned technical problem, there is provided a kind of simple structure, obtained using the noise produced in boring procedure
The rock Protodyakonov coefficient of back is taken, easy to use, simple to operate, the low back rock based on sound meter of detected intensity
Stone Protodyakonov coefficient surveys device and method with probing.
Technical scheme：To realize above-mentioned technical purpose, back rock Protodyakonov coefficient of the present invention based on sound meter with
Detection device is bored, including bearing-type, with boring device, monomer jumbolter, sound meter and drilling rod, wherein monomer jumbolter is vertical
Roadway floor is arranged on, the top of monomer jumbolter is provided with the bearing-type for piercing back with brill dress by scale-type drilling rod
Put, bearing-type is connected with sound meter by connecting line with boring device.
Sound meter probe, cone-shaped component, quiet bearing and brill that the bearing-type includes being arranged on drilling rod with boring device
Head, wherein drill bit are arranged on scale-type drilling rod top, and quiet bearing is arranged on the drilling rod below drill bit, and quiet bearing is provided with
Multi-disc cone-shaped component, sound meter probe are arranged on cone-shaped component, and sound meter probe is connected with sound meter by connecting line.
Described quiet bearing bore diameter is 15～25mm, and external diameter is 25～35mm, internal diameter and the welding of scale-type drilling rod, external diameter
Weld with cone-shaped component.
Described monomer jumbolter is fluid pressure type or pneumatic type；Drilling rod be scale-type drilling rod, scale-type run of steel
For 1m, from top to bottom every a height of 1cm of one circle of 10cm processing, the deep groove for 1mm, scale-type drilling rod surface is provided with reflective painting
Material, will spray the yellowish green ultramarine purple nine kinds of coloured panels of black and white of reddish orange, wherein L from top to bottom along drilling direction in groove1Length
For 100cm, L2Length be 10cm.
A kind of back rock Protodyakonov coefficient based on sound meter is as follows with detection method, its step is bored：
A. set up the java standard library of the rock Protodyakonov coefficient 0.3～20 in mine：Core in same heading place,
Top board being cored different layers position rock of drill through in the range of the 20m of place, and according to《Coal and physical-mechanical properties of rock assay method》Plus
Work is combined into standard specimen, in the lab using jumbolter and drill bit for obtaining 0.3～20 each rock of rock core Protodyakonov coefficient
The various combination of stone carries out drilling experiment, and the decibel of noise during test drill bit drilling standard specimen is recorded using sound meter
All standard specimens are carried out drilling test, obtain the rock standard specimen drilling process of different Protodyakonov coefficients 0.3～20 by value
Noise decibel value scope；
B. monomer jumbolter is opened, monomer jumbolter drives bearing-type with boring device on back by drilling rod
Drilling is pierced, sound meter is started working, acquisition bearing-type noise decibel value and decibel value in back drilling with boring device
Performance graph；With reference to scale-type drilling rod reading, 10cm is often crept into, stop drilling, the artificial decibel value model read in sound meter
Enclose, and contrasted with the java standard library of the rock Protodyakonov coefficient 0.3～20 set up based on the mine, obtain the rock in the range of this
Solid coefficient and drilling distance；When scale-type run of steel is not enough, increase the scale-type drilling rod for extending in tail end；
C. repeat step b, so as to obtain the rock consolidating coefficient in the range of top plate drilling.
Beneficial effect：
The noise that this method is produced during jumbolter is punchinged changes into beneficial sound source, realizes to balkstone
Real-time, the continuous detection of solid coefficient, the installing of drill bit rear are loaded with the bearing-type of sound meter probe with boring device, using with
The method that scale-type drilling rod reading is combined, during drilling, tests the drilling volume decibel value of different depth, Binding experiment
The java standard library of the rock Protodyakonov coefficient 0.3～20 that room is set up, by comparing tunnel original position rock drilling volume decibel value, quickly obtains lane
The injurious noise of the process of punchinging is converted into beneficial sound source by the rock Protodyakonov coefficient in the range of road top plate drilling, is realized with probing
Survey and supporting parameter, strengthening supporting or appropriate reduction are adjusted in time according to the change treatment in accordance with local conditions of local balkstone solid coefficient
Supporting efficiency, supporting waste and supporting intensity not enough cause roof fall accident in effectively preventing from producing, and provide peace for coal miner
Complete reliable working environment, which has onsite application convenient, simple to operate, and labor intensity is low, does not affect the advantage of normal production.
Description of the drawings
Fig. 1 is the plane arrangement structure schematic diagram of the present invention；
Fig. 2 is the bearing-type of the present invention with boring device schematic diagram；
Fig. 3 is the schematic diagram of the scale-type drilling rod of the present invention.
In figure：1- bearing-types are with boring device；2- monomer jumbolters；3- sound meters；4- scale-type drilling rods；5- lanes
Road top board；6- roadway floors；7- sound meters are popped one's head in；8- cone-shaped components；The quiet bearings of 9-；10- drill bits；11- drills；
12- connecting lines.
Specific embodiment
Below in conjunction with the accompanying drawings the embodiment of the present invention is further described：
As shown in figure 1, the back rock Protodyakonov coefficient based on sound meter of the present invention is with boring detection device, including axle
Formula is held with boring device 1, monomer jumbolter 2, sound meter 3 and drilling rod, wherein monomer jumbolter 2 is vertically set on roadway floor
6, the top of monomer jumbolter 2 is provided with the bearing-type for piercing back 5 with boring device 1, bearing-type by scale-type drilling rod 4
It is connected with sound meter 3 by connecting line 12 with boring device 1.
As shown in Fig. 2 the bearing-type include being arranged on drilling rod with boring device 1 sound meter probe 7, cone-shaped component 8,
Quiet bearing 9 and drill bit 10, wherein drill bit 10 are arranged on 4 top of scale-type drilling rod, and quiet bearing 9 is arranged on below drill bit 10
On drilling rod, quiet bearing 9 is provided with multi-disc cone-shaped component 8, and sound meter probe 7 is arranged on cone-shaped component 8, sound meter probe 7
It is connected with sound meter 3 by connecting line 12.Described 9 internal diameter of quiet bearing be 15～25mm, external diameter be 25～35mm, internal diameter
Weld with scale-type drilling rod 4, external diameter is welded with cone-shaped component 8.
As shown in figure 3, described monomer jumbolter 2 is fluid pressure type or pneumatic type；Drilling rod is scale-type drilling rod 4, is carved
4 length of degree formula drilling rod is 1m, from top to bottom every a height of 1cm of one circle of 10cm processing, the deep groove for 1mm, 4 table of scale-type drilling rod
Face is provided with reflecting coating, will spray the yellowish green ultramarine purple nine kinds of coloured panels of black and white of reddish orange from top to bottom along drilling direction in groove,
Wherein L1Length be 100cm, L2Length be 10cm.
A kind of back rock Protodyakonov coefficient based on sound meter is as follows with detection method, its step is bored：
A. set up the java standard library of the rock Protodyakonov coefficient 0.3～20 in mine：Core in same heading place,
Top board being cored different layers position rock of drill through in the range of the 20m of place, and according to《Coal and physical-mechanical properties of rock assay method》Plus
Work is combined into standard specimen, in the lab using jumbolter and drill bit for obtaining 0.3～20 each rock of rock core Protodyakonov coefficient
The various combination of stone carries out drilling experiment, and the decibel of noise during test drill bit drilling standard specimen is recorded using sound meter
All standard specimens are carried out drilling test, obtain the rock standard specimen drilling process of different Protodyakonov coefficients 0.3～20 by value
Noise decibel value scope；
B. monomer jumbolter 2 is opened, monomer jumbolter 2 drives bearing-type to push up in tunnel with boring device 1 by drilling rod
Drilling 11 is pierced on plate 5, sound meter 3 is started working, acquisition bearing-type noise decibel in the drilling of back 5 with boring device 1
The performance graph of value and decibel value；With reference to 4 reading of scale-type drilling rod, 10cm is often crept into, stop drilling, it is artificial to read sound meter 3
In decibel value scope, and contrasted with the java standard library of the rock Protodyakonov coefficient 0.3～20 set up based on the mine, be somebody's turn to do
In the range of rock consolidating coefficient and drilling distance, drilling rod often creeps into 0.1m, according to the size of measured decibel value, with rock
The java standard library of stone Protodyakonov coefficient 0.3～20 is contrasted, it may be determined that the rock consolidating coefficient in drilling in 0.1m distances；Root
Solid coefficient according to balkstone is different, and the rock in the range of time update supporting parameter, such as local top board is relatively soft to be
Mud stone, it is necessary to strengthening supporting, suspension roof support density is increased, to ensure stability of cavern roof；Rock in the range of the top board of local compared with
It is sandstone firmly, array pitch between increasing suspension roof support that can be appropriate meets supporting requirement, while the waste of material is reduced, it is real
The treatment in accordance with local conditions of roadway support is showed；
When scale-type 4 curtailment of drilling rod, increase the scale-type drilling rod 4 for extending in tail end；
C. repeat step b, so as to obtain the rock consolidating coefficient in the range of top plate drilling 11.
Claims (5)
1. a kind of back rock Protodyakonov coefficient based on sound meter is with brill detection device, it is characterised in that：It includes bearing
Formula is vertically set on lane with boring device (1), monomer jumbolter (2), sound meter (3) and drilling rod, wherein monomer jumbolter (2)
Road base plate (6), the top of monomer jumbolter (2) be provided with by scale-type drilling rod (4) pierce the bearing-type of back (5) with
Boring device (1), bearing-type are connected with sound meter (3) by connecting line (12) with boring device (1).
2. the back rock Protodyakonov coefficient based on sound meter according to claim 1 is with brill detection device, its feature
It is：The bearing-type is with boring device (1) including sound meter probe (7), cone-shaped component (8), quiet axle being arranged on drilling rod
(9) and drill bit (10) are held, wherein drill bit (10) is arranged on scale-type drilling rod (4) top, and quiet bearing (9) is arranged on drill bit (10)
On the drilling rod of lower section, quiet bearing (9) is provided with multi-disc cone-shaped component (8), and sound meter probe (7) is arranged on cone-shaped component (8)
On, sound meter probe (7) is connected with sound meter (3) by connecting line (12).
3. the back rock Protodyakonov coefficient according to claim 2 based on sound meter is with brill detection device, it is characterised in that：Institute
Quiet bearing (9) internal diameter stated is 15～25mm, and external diameter is 25～35mm, internal diameter and scale-type drilling rod (4) welding, external diameter and cone
Shape component (8) is welded.
4., with detection device is bored, which is special for the back rock Protodyakonov coefficient based on sound meter according to claim 1 and 2
Levy and be：Described monomer jumbolter (2) is fluid pressure type or pneumatic type；Drilling rod be scale-type drilling rod (4), scale-type drilling rod
(4) length is 1m, and from top to bottom every a height of 1cm of one circle of 10cm processing, the deep groove for 1mm, scale-type drilling rod (4) surface sets
There is reflecting coating, the yellowish green ultramarine purple nine kinds of coloured panels of black and white of reddish orange will be sprayed from top to bottom in groove along drilling direction, wherein
L1Length be 100cm, L2Length be 10cm.
5. a kind of usage right requires the back rock Protodyakonov coefficient based on sound meter of 1 described device with probing survey side
Method, it is characterised in that step is as follows：
A. set up the java standard library of the rock Protodyakonov coefficient 0.3～20 in mine：Core in same heading place, in top board
Coring different layers position rock of drill through in the range of the 20m of place, and according to《Coal and physical-mechanical properties of rock assay method》Processing group
Synthetic standards sample, in the lab using jumbolter and drill bit for obtaining 0.3～20 each rock of rock core Protodyakonov coefficient
Various combination carries out drilling experiment, and records the decibel value that test drill bit creeps into noise during standard specimen using sound meter,
Drilling test is carried out to all standard specimens, the rock standard specimen drilling process for obtaining different Protodyakonov coefficients 0.3～20 is made an uproar
Sound decibel value scope；
B. monomer jumbolter (2) is opened, monomer jumbolter (2) drives bearing-type with boring device (1) in tunnel by drilling rod
Drilling (11) is pierced on top board (5), sound meter (3) is started working, obtain bearing-type and bore in back (5) with boring device (1)
Enter the performance graph of middle noise decibel value and decibel value；With reference to scale-type drilling rod (4) reading, 10cm is often crept into, stop drilling, people
Part work and part study takes the decibel value scope in sound meter (3), and the java standard library with the rock Protodyakonov coefficient 0.3～20 set up based on the mine
Contrasted, obtained the rock consolidating coefficient and drilling distance in the range of this；When scale-type drilling rod (4) curtailment,
Tail end increases the scale-type drilling rod (4) for extending；
C. repeat step b, so as to obtain the rock consolidating coefficient in the range of top plate drilling (11).
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611101992.2A CN106593424B (en) | 2016-12-05 | 2016-12-05 | Back rock Protodyakonov coefficient based on sound level meter is with brill detection method |
| PCT/CN2017/091610 WO2018103325A1 (en) | 2016-12-05 | 2017-07-04 | Sound level meter-based measurement while drilling device and method for obtaining protodikonov's hardness coefficient of rock of tunnel roof |
| AU2017317602A AU2017317602B2 (en) | 2016-12-05 | 2017-07-04 | Sound level meter-based tunnel roof rock Protodyakovnov coefficient detecting-while-drilling apparatus and method |
| RU2018110400A RU2688714C1 (en) | 2016-12-05 | 2017-07-04 | Device and method of determining, during drilling, coefficient of fortress according to protodyakov of the tunnel roof rock based on the sound level meter |
| CA2997155A CA2997155C (en) | 2016-12-05 | 2017-07-04 | Sound level meter-based tunnel roof rock protodyakonov coefficient detecting-while-drilling apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611101992.2A CN106593424B (en) | 2016-12-05 | 2016-12-05 | Back rock Protodyakonov coefficient based on sound level meter is with brill detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106593424A true CN106593424A (en) | 2017-04-26 |
| CN106593424B CN106593424B (en) | 2019-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611101992.2A Active CN106593424B (en) | 2016-12-05 | 2016-12-05 | Back rock Protodyakonov coefficient based on sound level meter is with brill detection method |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN106593424B (en) |
| AU (1) | AU2017317602B2 (en) |
| CA (1) | CA2997155C (en) |
| RU (1) | RU2688714C1 (en) |
| WO (1) | WO2018103325A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387060A (en) * | 2017-09-11 | 2017-11-24 | 中国矿业大学 | Method for guiding fully-mechanized coal mining machine to mine coal from top |
| WO2018103325A1 (en) * | 2016-12-05 | 2018-06-14 | 中国矿业大学 | Sound level meter-based measurement while drilling device and method for obtaining protodikonov's hardness coefficient of rock of tunnel roof |
| CN110486007A (en) * | 2019-08-29 | 2019-11-22 | 武汉长盛煤安科技有限公司 | Coal mine is with brill rock reaction force in-situ testing device and method |
| CN112360527A (en) * | 2020-11-11 | 2021-02-12 | 中国矿业大学 | Anchoring agent compaction device, anchor rod and using method |
| CN113216864A (en) * | 2021-05-06 | 2021-08-06 | 六盘水师范学院 | Drilling device for tunnel roof rock property components |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110219642B (en) * | 2019-04-26 | 2022-10-14 | 中国石油化工股份有限公司 | Sound wave time difference correction method based on sound wave propagation path |
| CN113503153A (en) * | 2021-09-13 | 2021-10-15 | 四川交达预应力工程检测科技有限公司 | Self-adaptive drilling hole-forming method and system |
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| WO2018103325A1 (en) * | 2016-12-05 | 2018-06-14 | 中国矿业大学 | Sound level meter-based measurement while drilling device and method for obtaining protodikonov's hardness coefficient of rock of tunnel roof |
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| CN112360527A (en) * | 2020-11-11 | 2021-02-12 | 中国矿业大学 | Anchoring agent compaction device, anchor rod and using method |
| CN113216864A (en) * | 2021-05-06 | 2021-08-06 | 六盘水师范学院 | Drilling device for tunnel roof rock property components |
Also Published As
| Publication number | Publication date |
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| CN106593424B (en) | 2019-09-10 |
| AU2017317602B2 (en) | 2019-08-08 |
| CA2997155A1 (en) | 2018-06-05 |
| CA2997155C (en) | 2019-06-18 |
| AU2017317602A1 (en) | 2018-06-21 |
| WO2018103325A1 (en) | 2018-06-14 |
| RU2688714C1 (en) | 2019-05-22 |
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