CN106814398B - A kind of shallow overburden Seam Mining unconsolidated formation infiltration rate variation measuring method - Google Patents
A kind of shallow overburden Seam Mining unconsolidated formation infiltration rate variation measuring method Download PDFInfo
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- CN106814398B CN106814398B CN201710206509.5A CN201710206509A CN106814398B CN 106814398 B CN106814398 B CN 106814398B CN 201710206509 A CN201710206509 A CN 201710206509A CN 106814398 B CN106814398 B CN 106814398B
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
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Abstract
The invention belongs to permeability variation detection technology fields, it is related to a kind of shallow overburden Seam Mining unconsolidated formation infiltration rate variation measuring method, measuring device is put into the exploration hole for completion of having constructed, according to scale numerical value on the outside of pipeline, it is positioned over scheduled investigation depth, then load pusher pipeline is inflated so that probe contacts unconsolidated formation and starts gathered data, gathered data uses multi-functional induced polarization instrument device, measurement method to use three pole observation systems；The measuring section, which is inflated unloading pusher pipeline after detecting, makes probe be retracted in shell, repeats above procedure, until full section measurement terminates；Its is simple for process, easy to operate, reasonable design, light portable, and result of detection is stablized accurate.
Description
Technical field
The invention belongs to permeability variation detection technology field, it is related to before and after a kind of seam mining unconsolidated formation in overlying strata stratum
By the permeability variation detection process under mining influence, especially a kind of shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change
Method.
Background technology
The continued downturn since 2012 of Chinese coal economic situation, at present coal of the coal price already below certain areas
Charcoal production cost, especially traditional coal bases-North China type coalfield, since working seam is deeper, coal exists North China type coalfield
The insecurity encountered in production process is more, such as water damage, Gas Disaster, top plate disaster etc..The Northwest is due to coal seam
The geological conditions of preservation is relatively simple, coal mining advantage of lower cost, the insecurity involved in progress of coal mining
Degree of danger is relatively low, therefore northwest has become the most important base of the coal in China energy.Due to northwest coalfield Energy Base
Coal seam be mainly Datong seam group, buried depth is shallower, and coal seam is Quaternary aquifer in the main problem involved in recovery process
Water damage prevention problem, Quaternary aquifer protection problem.Therein 4th is that loose aquifer water damage has become threat coal seam
The main prevention water problems of exploitation, and the water protection mining of arid area has become it in the weight of the Northwest's ecological environmental protection
Weight.
Currently, for the prevention of unconsolidated formation water damage relate generally to two aspect the problem of, one be Atmospheric precipitation infiltration,
Its supply problem as aquifer water；The other is Quaternary Strata is stablized by deformation, movement and again after seam mining
Permeability situation of change afterwards.Both of which is related to foregoing anti-harness the river and water protection mining problem.For Atmospheric precipitation
Research is infiltrated, can be to the critical parameter of estimated offer of inflow rate of mine water, while Quaternary aquifer can also be obtained
Hydrogeological parameter, to the watery evaluation etc. of Quaternary aquifer；For the water protection mining problem of Quaternary aquifer, lead to
It is the infiltrative variation of loose aquifer to cross continuous probe the 4th, and whether the water isolating to evaluate water barrier in unconsolidated formation has
There is self-regeneration function, or shows whether Seam Mining influences to this layer of position with result of detection.Therefore infiltrative to unconsolidated formation
Change detection is very important, and detection achievement is also significantly.
The current infiltrative research report that yet there are no for loose aquifer, especially in shallow overburden seam mining mistake
In journey corresponding research contents is there are no in terms of the permeability detection of overlying strata loose aquifer.Therefore there is an urgent need to develop a kind of wounds
New property shallow overburden Seam Mining unconsolidated formation infiltration rate variation measuring method, to loosely aqueous to the 4th system of shallow overburden coal seam mining area
The permeability change detection and research work of layer.
Invention content
It is an object of the invention to overcome disadvantage of the existing technology, seeks design and a kind of shallow overburden Seam Mining is provided
Unconsolidated formation infiltration rate variation measuring method, to be the permeability change detection of loose aquifer to shallow overburden coal seam mining area the 4th
And research work.
To achieve the goals above, the present invention first places shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change device
In in the exploration hole for having constructed completion, integrating the scale marked on transfer tube according to multicore, transfer to predetermined depth, then
Air pressure promotion is carried out to load power transmission pipe, so that metal probe is entered detection destination layer, then connects Multi-core cable joint extremely
Multi-functional induced polarization instrument device carries out data acquisition, to unloading after data acquisition using three pole MNB observation devices to detection destination layer
It carries be connected by power pipe and carries out air pressure promotion, metal probe is made to be extracted from detection destination layer and be retracted in seal casinghousing, then
The detection operations of next destination layer are carried out, detection operations of the above procedure completion to exploration hole full section are repeated, detailed process is：
（1）According to the buried depth and thickness of detection destination layer, it is pre-designed starting investigation depth, record start position is for putting
The use of shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change device is set, detection aperture is set as 75mm, is set in the 2m of aperture
Borehole casing is set to fall into exploration hole to prevent foreign matter to prevent collapse hole, casing length 2.1m and eminence ground 0.1m；
（2）It is detected using shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change device after drilling construction,
First check load pusher and unloading pusher whether work normally, pipeline whether gas leakage, multicore integrate transfer tube in multicore
Shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change device is put into drilling by cable with the presence or absence of open circuit after inspection
It is interior, and compare the length scales that multicore integrates on transfer tube and be put into initial position；
（3）Load power transmission pipe is inflated using pump-up device, pressure gauge is observed, when air pressure reaches 0.4MPa
When, metal probe enters in object to be measured layer, and withdrawing pump-up device at this time makes air pressure drop down to 0MPa, and Multi-core cable joint is connect
Enter multi-functional induced polarization instrument, uses existing three pole observation device gathered data；
（4）Data are inflated unloading be connected by power pipe after acquiring, observed pressure table, when air pressure reaches 0.4MPa
When, metal probe is extracted out of object to be measured layer and is entered in seal casinghousing, withdraw at this time pump-up device make air pressure drop down to
0MPa, the measuring section transfer 2m and carry out continuing observation after measuring, in next measuring section, repeat process above；If surveying
During amount, when causing metal probe that can not be retracted in seal casinghousing due to object to be measured layer densification, then repeat dynamic to loading
Power transfer tube and unloading be connected by power pipe are inflated, again to unloading power after making metal probe be loosened in object to be measured layer
Connecting tube inflation is retracted in seal casinghousing.
The agent structure of buried depth Seam Mining unconsolidated formation infiltration rate measure of the change device of the present invention includes rigid plastics
Probing shell, metal probe, multicore integrate transfer tube, unloading pusher, load pusher, rigid plastics probe loading plate, add
Carry power transmission pipe, unloading be connected by power pipe, multicore cable, holder, seal casinghousing, probe aperture, Multi-core cable joint, sealing plate
With sealing plate sliding rail；It is provided with rigid plastics probing shell on the inside of seal casinghousing, for protecting metal probe, PVC material to be made
Cylindrical-shaped structure seal casinghousing side wall on be uniformly provided with 17 probe apertures, one layer of elastomer is provided in probe aperture,
Make metal probe that there is sealing performance after probe aperture, unconsolidated formation water is avoided to enter in seal casinghousing；At the top of seal casinghousing
It stays and sets sealing plate and sealing plate sliding rail, to keep leakproofness in metal probe load and uninstall process, on sealing plate sliding rail
It is provided with seal gasket, multicore integrates transfer tube and is fixed on sealing plate sliding rail, and the length of seal casinghousing is 2m, wall thickness 5mm,
A diameter of 70mm；It is evenly arranged with three groups of load pushers opposite with probe hole site in seal casinghousing internal side wall, loads
It is fixed at the top of pusher on rigid plastics probe loading plate, pushes metal probe to enter detection destination layer when loading
It is interior, by load power transmission pipe unicom between three groups of load pushers, and pushed using pump-up device；The tail of seal casinghousing
Portion and top are respectively equipped with one group of unloading pusher, and the structure and parameter for unloading pusher is consistent with load pusher, and two groups are unloaded
It carries pusher and is mounted on the multicore that length is 50 meters by unloading be connected by power pipe unicom, unloading be connected by power pipe and integrates transfer tube
It is interior；The metal probe of steel material is fixed on rigid plastics probe loading plate, and the length of metal probe is 40mm, a diameter of
The spacing of 2mm, two neighboring metal probe are 10mm, and the number of metal probe is consistent with probe aperture；Each metal probe is independent
The conducting wire of connection collects in multicore cable, and is integrated in multicore collection with unloading be connected by power pipe, one piece of load power transmission pipe
At transfer tube, retracted position and aligned position in the middle part of metal probe and the retracted position of load pusher of pusher are unloaded
Place is respectively mounted holder；The end that multicore integrates transfer tube is provided with Multi-core cable joint, Multi-core cable joint and external more work(
Energy induced polarization instrument connection, the acquisition for carrying out DC resistivity data.
Load pusher of the present invention is jack type pushing meanss, and pump-up device uses inflator, since metal is visited
Needle diameter is only 2mm, therefore can easily be entered in unconsolidated formation under the impetus of small-sized pusher, and the straight of pusher is loaded
Diameter is 35mm, and contracted length 20mm, load length is 50mm.
Seal casinghousing of the present invention is cylindrical, using PVC（Polyvinyl chloride, polyvinyl chloride）Material system
At reducing the Conductivity due to detection device to the result of detection accuracy of unconsolidated formation.
Multicore of the present invention integrates transfer tube and is made of 17 core cables and two a diameter of 5mm hoses, and 17 core cables are
Gathered data transmission line, two hoses are the power transmission pipeline for loading pusher and unloading pusher, and multicore integrates outside transfer tube
Wall is equipped with length scales measuring investigation depth since the section of shell top.
The present invention loads pusher in use, the pipeline of unloading pusher is in open state, one of them is in pressurization
State one is in normal pressure state, pushes metal probe to release and enter in unconsolidated formation out of seal casinghousing, to measure.
The power source of unloading pusher of the present invention is gas, and unloading is carried out to it using inflator after measurement pushes away
Dynamic, unloading pusher is in use, the pipeline of load pusher is in open state, and at this moment load propeller is in pressurized state,
Unloading propeller be in normal pressure state, and promotion metal probe in unconsolidated formation from extracting and withdraw in seal casinghousing.
Compared with prior art, the present invention its is simple for process, easy to operate, reasonable design is light portable, result of detection
It is accurate to stablize, in use, measuring device is put into the exploration hole for completion of having constructed, according to scale numerical value on the outside of pipeline, places
In scheduled investigation depth, then load pusher pipeline is inflated so that probe contacts unconsolidated formation and starts to acquire number
According to gathered data uses multi-functional induced polarization instrument device, measurement method to use three pole observation systems；To unloading after measuring section detection
Carrying be connected by power pipe and being inflated makes probe be retracted in shell, repeats above procedure, until full section measurement terminates.
Description of the drawings：
Fig. 1 is the agent structure principle schematic of the present invention.
Fig. 2 is that the agent structure of the present invention loads probe principle schematic.
Fig. 3 is load of the present invention, unloads pusher sectional view.
Fig. 4 is multicore integrated cable of the present invention and probe sectional view.
Fig. 5 is seal casinghousing top sealing plate structure chart of the present invention.
Specific implementation mode：
The invention will be further described by way of example and in conjunction with the accompanying drawings.
Embodiment：
Shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change device is first positioned over completion of having constructed by the present embodiment
Exploration hole in, integrate the scale marked on transfer tube 103 according to multicore, transfer to predetermined depth, then to loading power
Transfer tube 107 carries out air pressure promotion, so that metal probe 102 is entered detection destination layer, then connects Multi-core cable joint 113 at most
Function induced polarization instrument device carries out data acquisition, to unloading after data acquisition using three pole MNB observation devices to detection destination layer
Be connected by power pipe 108 carries out air pressure promotion, so that metal probe 102 is extracted from detection destination layer and is retracted to seal casinghousing 114
It is interior, the detection operations of next destination layer are then carried out, repeat above procedure completion to the detection operations of exploration hole full section, specific mistake
Cheng Wei：
（1）According to the buried depth and thickness of detection destination layer, it is pre-designed starting investigation depth, record start position is for putting
The use of shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change device is set, detection aperture is set as 75mm, is set in the 2m of aperture
Borehole casing is set to fall into exploration hole to prevent foreign matter to prevent collapse hole, casing length 2.1m and eminence ground 0.1m；
（2）It is detected using shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change device after drilling construction,
First check whether load pusher 105 and unloading pusher 104 work normally, pipeline whether gas leakage, multicore integrates transfer tube 103
In multicore cable with the presence or absence of open circuit, shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change device is put after inspection
Enter in drilling, and compares the length scales that multicore integrates on transfer tube 103 and be put into initial position；
（3）Load power transmission pipe 107 is inflated using pump-up device, pressure gauge is observed, when air pressure reaches
When 0.4MPa, metal probe 102 enters in object to be measured layer, and withdrawing pump-up device at this time makes air pressure drop down to 0MPa, by multicore
Cable connector 113 accesses multi-functional induced polarization instrument, uses existing three pole observation device gathered data；
（4）Data are inflated unloading be connected by power pipe 108 after acquiring, observed pressure table, when air pressure reaches
When 0.4MPa, metal probe 102 is extracted out of object to be measured layer and is entered in seal casinghousing 114, withdraws air charging system at this time
Make air pressure drop down to 0MPa, which transfers 2m and carry out continuing observation after measuring, in next measuring section, repeat mistake above
Journey；If in measurement process, since object to be measured layer densification causes metal probe 102 that can not be retracted in seal casinghousing 114
When, then it repeats to be inflated load power transmission pipe 107 and unloading be connected by power pipe 108, makes metal probe 102 in mesh to be measured
The unloading inflation of be connected by power pipe 108 is retracted in seal casinghousing 114 again after being loosened in mark layer.
The agent structure of shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change device includes hard described in the present embodiment
Plastics probing shell 101, metal probe 102, multicore integrate transfer tube 103, unloading pusher 104, load pusher 105, is hard
Matter plastic director loading plate 106, load power transmission pipe 107, unloading be connected by power pipe 108, multicore cable 109, holder 111,
Seal casinghousing 114, probe aperture 112, Multi-core cable joint 113, sealing plate 201 and sealing plate sliding rail 202；In seal casinghousing 114
Side is provided with rigid plastics probing shell 101, for protecting metal probe 102, the sealing of cylindrical-shaped structure made of PVC material
It is uniformly provided with 17 probe apertures 112 on 114 side wall of shell, one layer of elastomer is provided in probe aperture 112, makes metal probe
102 have sealing performance after probe aperture 112, and unconsolidated formation water is avoided to enter in seal casinghousing 114；Seal casinghousing 114 pushes up
Portion, which is stayed, sets sealing plate 201 and sealing plate sliding rail 202, close to keep leakproofness in the load of metal probe 102 and uninstall process
Seal gasket is provided on sealing plate sliding rail 202, multicore integrates transfer tube 103 and is fixed on sealing plate sliding rail 202, seal casinghousing
114 length is 2m, wall thickness 5mm, a diameter of 70mm；It is evenly arranged with three groups and probe in 114 internal side wall of seal casinghousing
The top of the opposite load pusher 105 in 112 position of hole, load pusher 105 is fixed on rigid plastics probe loading plate 106
On, push metal probe 102 to enter in detection destination layer when loading, by load power between three groups of load pushers 105
107 unicom of transfer tube, and pushed using pneumatic source；The tail portion and top of seal casinghousing 114 are respectively equipped with one group of unloading and push away
Dynamic device 104, the structure and parameter for unloading pusher 104 is consistent with load pusher 105, and two groups of unloading pushers 104 are by unloading
108 unicom of be connected by power pipe is carried, unloading be connected by power pipe 108 is mounted on the multicore that length is 50 meters and integrates in transfer tube 103；Steel
The metal probe 102 of material is fixed on rigid plastics probe loading plate 106, and the length of metal probe 102 is 40mm, diameter
Spacing for 2mm, two neighboring metal probe 102 is 10mm, and the number of metal probe 102 is consistent with probe aperture 112；Each gold
Belong to the conducting wire that individually connects of probe 102 to collect in multicore cable 109, and with unloading be connected by power pipe 108, load power transmission
107 1 pieces of pipe is integrated in multicore and integrates transfer tube 103, and the retracted position for unloading pusher 104 is aligned with 102 middle part of metal probe
At position and the collapsed position of load pusher 105 is respectively mounted holder 111；Multicore integrates the end setting of transfer tube 103
There is Multi-core cable joint 113, Multi-core cable joint 113 is connect with external multi-functional induced polarization instrument, for carrying out dc resistivity
The acquisition of data.
It is jack type pushing meanss that pusher 105 is loaded described in the present embodiment, and pneumatic source uses inflator, due to metal
102 diameter of probe is only 2mm, therefore can easily be entered in unconsolidated formation under the impetus of small-sized pusher, and load pushes
A diameter of 35mm of device 105, contracted length 20mm, load length are 50mm.
Seal casinghousing 114 described in the present embodiment is cylindrical, using PVC（Polyvinyl chloride, polyvinyl chloride）
Material is made, and reduces the Conductivity due to detection device to the result of detection accuracy of unconsolidated formation.
Multicore described in the present embodiment integrates transfer tube 103 and is made of 17 core cables and two a diameter of 5mm hoses, 17 cores electricity
Cable is gathered data transmission line, and two hoses are the power transmission pipeline for loading pusher and unloading pusher, the integrated transmission of multicore
103 outer wall of pipe is equipped with length scales measuring investigation depth since the section of shell top.
The present embodiment load pusher 105 in use, unloading pusher 104 pipeline be in open state, one of them
In pressurized state, one is in normal pressure state, pushes metal probe 102 to be released out of seal casinghousing 114 and enters unconsolidated formation
It is interior, to measure.
The power source that pusher 104 is unloaded described in the present embodiment is gas, is unloaded to it using inflator after measurement
Carry push, unloading pusher 104 in use, load pusher 105 pipeline be in open state, at this moment load propeller 105
In pressurized state, unloading pusher 104 is in normal pressure state, and metal probe 102 is pushed to extract and withdraw close from unconsolidated formation
In capsule body 114.
Claims (4)
1. a kind of shallow overburden Seam Mining unconsolidated formation infiltration rate variation measuring method, it is characterised in that first by shallow overburden Seam Mining
Unconsolidated formation infiltration rate measure of the change device is positioned in the exploration hole for completion of having constructed, and is integrated according to multicore and is marked on transfer tube
The scale of note is transferred to predetermined depth, then carries out air pressure promotion to load power transmission pipe, metal probe is made to enter detection mesh
Layer is marked, Multi-core cable joint is then connected to multi-functional induced polarization instrument device, detection destination layer is carried out using three pole MNB observation devices
Data acquire, and data carry out air pressure promotion after acquiring to unloading be connected by power pipe, make metal probe from detection destination layer
It extracts and is retracted in seal casinghousing, then carry out the detection operations of next destination layer, repeat above procedure and complete to exploration hole
The detection operations of full section, detailed process are：
（1）According to the buried depth and thickness of detection destination layer, it is pre-designed starting investigation depth, record start position is shallow for placing
Buried depth Seam Mining unconsolidated formation infiltration rate measure of the change device uses, and detection aperture is set as 75mm, is arranged in the 2m of aperture and bores
Hole sleeve falls into prevent foreign matter in exploration hole to prevent collapse hole, casing length 2.1m and eminence ground 0.1m；
（2）It is detected using shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change device after drilling construction, is first examined
Look into load pusher and unloading pusher whether work normally, pipeline whether gas leakage, multicore integrate transfer tube in multicore cable
With the presence or absence of open circuit, shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change device is put into drilling after inspection, and
The length scales that control multicore integrates on transfer tube are put into initial position；
（3）Load power transmission pipe is inflated using pump-up device, observes pressure gauge, when air pressure reaches 0.4MPa, gold
Belong to probe to enter in object to be measured layer, withdrawing pump-up device at this time makes air pressure drop down to 0MPa, Multi-core cable joint is accessed more
Function induced polarization instrument uses existing three pole observation device gathered data；
（4）Data are inflated unloading be connected by power pipe after acquiring, observed pressure table, when air pressure reaches 0.4MPa,
Metal probe is extracted out of object to be measured layer and is entered in seal casinghousing, withdraw at this time pump-up device make air pressure drop down to
0MPa, the measuring section transfer 2m and carry out continuing observation after measuring, in next measuring section, repeat process above；If surveying
During amount, when causing metal probe that can not be retracted in seal casinghousing due to object to be measured layer densification, then repeat dynamic to loading
Power transfer tube and unloading be connected by power pipe are inflated, again to unloading power after making metal probe be loosened in object to be measured layer
Connecting tube inflation is retracted in seal casinghousing.
2. shallow overburden Seam Mining unconsolidated formation infiltration rate variation measuring method according to claim 1, it is characterised in that described
The agent structure of shallow overburden Seam Mining unconsolidated formation infiltration rate measure of the change device includes rigid plastics probing shell, metal spy
Needle, multicore integrate transfer tube, unloading pusher, load pusher, rigid plastics probe loading plate, load power transmission pipe, unload
Carry be connected by power pipe, multicore cable, holder, seal casinghousing, probe aperture, Multi-core cable joint, sealing plate and sealing plate sliding rail；It is close
Envelope case inside is provided with rigid plastics probing shell, and for protecting metal probe, cylindrical-shaped structure is close made of PVC material
Be uniformly provided with 17 probe apertures on capsule body sidewall, one layer of elastomer be provided in probe aperture, make metal probe across
There is sealing performance after probe aperture, unconsolidated formation water is avoided to enter in seal casinghousing；It is stayed at the top of seal casinghousing and sets sealing plate and sealing
Plate sliding rail is provided with seal gasket to keep leakproofness in metal probe load and uninstall process on sealing plate sliding rail, more
Core integrates transfer tube and is fixed on sealing plate sliding rail, and the length of seal casinghousing is 2m, wall thickness 5mm, a diameter of 70mm；Capsul
It is evenly arranged with three groups of load pushers opposite with probe hole site in body internal side wall, loads and is fixed at the top of pusher
Push metal probe to enter in detection destination layer on rigid plastics probe loading plate, when loading, three groups of load pushers it
Between by load power transmission pipe unicom, and pushed using pump-up device；The tail portion and top of seal casinghousing are respectively equipped with one
Group unloading pusher, the structure and parameter for unloading pusher is consistent with load pusher, and two groups of unloading pushers are dynamic by unloading
Power connecting tube unicom, unloading be connected by power pipe are mounted on the multicore that length is 50 meters and integrate in transfer tube；The metal of steel material
Probe is fixed on rigid plastics probe loading plate, and the length of metal probe is 40mm, a diameter of 2mm, and two neighboring metal is visited
The spacing of needle is 10mm, and the number of metal probe is consistent with probe aperture；The conducting wire that each metal probe individually connects collects in more
It in core cable, and is integrated in multicore with unloading be connected by power pipe, one piece of load power transmission pipe and integrates transfer tube, unload pusher
Retracted position and metal probe in the middle part of aligned position and load the collapsed position of pusher and be respectively mounted holder；Multicore collection
The end of transfer tube is provided with Multi-core cable joint, Multi-core cable joint connect with external multi-functional induced polarization instrument, be used for into
The acquisition of row DC resistivity data.
3. shallow overburden Seam Mining unconsolidated formation infiltration rate variation measuring method according to claim 2, it is characterised in that described
Load pusher is jack type pushing meanss, and pump-up device uses inflator, loads a diameter of 35mm of pusher, shrinks length
Degree is 20mm, and load length is 50mm.
4. shallow overburden Seam Mining unconsolidated formation infiltration rate variation measuring method according to claim 2, it is characterised in that described
Multicore integrates transfer tube and is made of 17 core cables and two a diameter of 5mm hoses, and 17 core cables are gathered data transmission line, and two is soft
Pipe is load pusher and unloads the power transmission pipeline of pusher, and the integrated transmission pipe outer wall of multicore is equipped with since the section of shell top
Length scales are measuring investigation depth.
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| CN106814398A (en) | 2017-06-09 |
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