CN106089072A - A kind of coal mine self-moving moves four stud location base plate anchor rod drilling devices - Google Patents
A kind of coal mine self-moving moves four stud location base plate anchor rod drilling devices Download PDFInfo
- Publication number
- CN106089072A CN106089072A CN201610584232.5A CN201610584232A CN106089072A CN 106089072 A CN106089072 A CN 106089072A CN 201610584232 A CN201610584232 A CN 201610584232A CN 106089072 A CN106089072 A CN 106089072A
- Authority
- CN
- China
- Prior art keywords
- underframe
- base plate
- rig
- added
- coal mine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000005553 drilling Methods 0.000 title claims abstract description 33
- 239000003245 coal Substances 0.000 title claims abstract description 21
- 238000005086 pumping Methods 0.000 claims abstract description 16
- 241000233855 Orchidaceae Species 0.000 claims description 16
- 241000196324 Embryophyta Species 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 3
- 239000003351 stiffener Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 12
- 238000009434 installation Methods 0.000 abstract description 8
- 239000011435 rock Substances 0.000 description 10
- 238000005065 mining Methods 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/003—Supports for the drilling machine, e.g. derricks or masts adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
-
- 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
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/04—Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
-
- 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
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/04—Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
- E21B15/045—Hydraulic, pneumatic or electric circuits for their positioning
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
- E21B7/024—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting having means for adapting to inclined terrain; having means for stabilizing the vehicle 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of coal mine self-moving and move four stud location base plate anchor rod drilling devices, including underframe (1), workpiece (2), added (3) and device positioning element (4)；Added it is fixedly mounted on underframe；Workpiece is arranged on underframe, including body (21), front and back gathering sill (22), front and back locator card blue (23), left and right gathering sill (24), left and right locator card blue (25), rig installing rack (26) and rig (27)；Device positioning element includes that location supports bi-directional expansion hydraulic cylinder (41) and control valve group and pumping plant (42), and four location support bi-directional expansion hydraulic cylinder body centrosymmetry are vertically fixedly mounted in added or underframe diagonal positions.This coal mine self-moving moves four stud location base plate anchor rod drilling devices and can provide reverse holding power in boring procedure and realize quickly holing roadway floor, overall raising rockbolt installation speed, is adapted to the requirement of Quick Road-Made.
Description
Technical field
The present invention relates to a kind of drilling equipment, specifically one be applicable to underground coal mine roadway floor carries out anchor pole of holing
The coal mine self-moving of supporting moves four stud location base plate anchor rod drilling devices, belongs to down-hole support equipment technical field.
Background technology
Due to the self-characteristic of different depth rock mass and the difference of residing ambient stress around tunnel, transported by geologic rhythm
The factor impacts such as dynamic, ground water pressure, country rock easily produces Incoordinate deformation, exploits especially for underground coal mine, top, tunnel, the end
Plate and two helps country rock to be deformed and move in tunnel, and the phenomenon that wherein roadway floor or gob floor upwards swell is i.e.
Referred to as pucking, pucking is a kind of dynamic phenomenon often occurred in roadway, it and the character of country rock, mining influence, mining depth
And geological structure etc. is directly related, some Floor Heave in Roadway amount of domestic mine even account for top, tunnel, the base plate amount of shifting near 70% with
On, bigger particular for mining depth, have that stress is high, temperature is high, subsoil water hydraulic pressure is high, strength of turbulence is high, danger of burst
The deep-seated setting of feature, high stress and soft rock mine roadway and the chambers such as height, creep is obvious, deformation is big, pucking makes roadway deformation, section become
Little, drastically influence the links such as mine ventilation, transport and personnel's walking, restriction mine safety and high-yield and high-efficiency and produce.
Underground coal mine prevents the generation of pucking phenomenon from not only wanting reinforcement roadway support, reinforced design method, and will be according to specifically
Wall rock geology condition take measures pucking amount is reduced to allowed band, generally use method for strengthening, destressing method, combination method and add
Gu the methods such as tunnel side, angle reduce pucking phenomenon, wherein method for strengthening is to be enclosed base plate by raising floor rocks intensity or raising
The supporting power of rock reaches the purpose of floor lift control, is a kind of the most frequently used pucking control method.
Improve the intensity of floor rocks, mainly have floor grouting, floor bolting etc., base plate is being used suspension roof support
Needing during operation first to hole base plate, traditional method need to be with pin or reversely air leg support above drilling rod in boring procedure
On back, to provide reverse holding power, but due in order to ensure that roadway floor does not destroys before installing anchor pole, it is necessary to
Installing anchor pole in driving face certain distance, the size of this distance is relevant with the character of floor rock, typically should be little
In 10 meters, the most unaffected in order to ensure tunnelling speed, the speed of usual rockbolt installation wants fast, and this traditional brill
Hole method operation not only complicated, manpower and materials consume big, and hole and install the speed of anchor pole compared with slow, efficiency is low, inadaptable
Requirement in Quick Road-Made.
Summary of the invention
For the problems referred to above, the present invention provides a kind of coal mine self-moving to move four stud location base plate anchor rod drilling devices, structure
Simply, it is possible to realize quickly roadway floor being carried out drilling operation on the premise of reverse holding power is provided in boring procedure, enter
And entirety improves rockbolt installation speed, it is adapted to the requirement of Quick Road-Made.
For achieving the above object, this coal mine self-moving moves four stud location base plate anchor rod drilling devices and includes underframe, work portion
Part, added and device positioning element；
Described added being fixedly mounted on underframe, underframe bottom is provided with the active at least including that one group of coaxial direction is arranged
The roller of wheel, drivewheel is provided with driving hydraulic motor；
Described workpiece is arranged on underframe, and, left and right blue including body, front and back gathering sill, front and back locator card guides
Groove, left and right locator card orchid, rig installing rack and rig；Body is located at fore-and-aft direction by cylindricality slip shoe frame and is arranged on inside underframe
Before and after on face on gathering sill；Front and back locator card is blue is connected with body and is equipped with on front and back's gathering sill；Rig installing rack
It is located at left and right directions by cylindricality slip shoe frame to be arranged on the left and right gathering sill on body medial surface；Left and right locator card orchid and rig
Installing rack connects and is equipped with on the gathering sill of left and right；Described rig is vertically arranged and is arranged on rig installing rack；
Described device positioning element includes that location supports bi-directional expansion hydraulic cylinder and control valve group and pumping plant；Location supports
Bi-directional expansion hydraulic cylinder is set to four, and four location support bi-directional expansion hydraulic cylinder body centrosymmetry and are vertically fixedly mounted on
In added or underframe diagonal positions, its piston end end is provided with support seat；Control valve group and pumping plant are arranged on underframe or added
On, the outfan of control valve group and pumping plant is supported bi-directional expansion hydraulic cylinder respectively and drives hydraulic pressure horse by fluid pressure line with location
Reach connection.
Scheme as a further improvement on the present invention, described body is by angle regulation positioning device and locator card front and back
Blue connection.
Scheme as a further improvement on the present invention, described rig installing rack passes through angle regulation positioning device and left and right
Locator card orchid connects.
Scheme as a further improvement on the present invention, described underframe and added be all frame structure.
Scheme as a further improvement on the present invention, described underframe and/or added frame structure two sides are provided with
Supporting rib stiffener arranged in a crossed manner.
Compared with prior art, this coal mine self-moving moves four stud location base plate anchor rod drilling devices and is arranged on the end owing to being provided with
Added on frame, location supports bi-directional expansion hydraulic cylinder and control valve group and pumping plant is arranged on added or underframe, therefore passes through
Operation control valve group and pumping plant make four location support bi-directional expansion hydraulic cylinder is the most two-way stretches out, location supports bi-directional expansion liquid
The support seat of cylinder pressure acts against and makes underframe form stable rigid support between back and base plate on top board and base plate, bores
During hole, the drilling rod of rig pierces the counteracting force that base plate produces and acts on underframe by rig installing rack, body, and underframe will work
Firmly support bi-directional expansion hydraulic cylinder by location and directly act on back and base plate, therefore need not the drilling rod at rig
Top pin or reversely air leg are supported on back to provide reverse holding power；Front and back guide owing to workpiece is provided with
Groove, front and back locator card orchid, left and right gathering sill, left and right locator card orchid, permissible after therefore steady for this base plate anchor pole boring device being had good positioning
Realize one position of fixed point and can complete the multiple rows of or operation in multiple row hole, i.e. can realize rig and lead in gathering sill and left and right front and back
All full lines and the bore position of permutation in groove stroke range carry out location boring；This coal mine self-moving moves at the bottom of four stud location
Plate anchor rod drilling device simple in construction, easily operated control, can carry out rockbolt installation after completing boring, hole and install anchor pole
Speed, installation effectiveness high, be adapted to the requirement of Quick Road-Made, employing base plate when being particularly well-suited to Floor Heave in Roadway is administered
The Quick mounting anchor rod of suspension roof support.
Accompanying drawing explanation
Fig. 1 is the three dimensional structure schematic diagram of the present invention.
In figure: 1, underframe, 11, drivewheel, 12, drive hydraulic motor, 2, workpiece, 21, body, 22, front and back guide
Groove, 23, front and back locator card are blue, 24, left and right gathering sill, 25, left and right locator card blue, 26, rig installing rack, 27, rig, 3, on
Frame, 4, device positioning element, 41, location, top supporting cylinder, 42, location, bottom supporting cylinder, 43, control valve group and pump
Stand.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings.
As it is shown in figure 1, this coal mine self-moving move four stud location base plate anchor rod drilling devices include underframe 1, workpiece 2,
Added 3 and device positioning element 4.
Described added 3 are fixedly mounted on underframe 1, and underframe 1 bottom is provided with and at least includes what one group of coaxial direction was arranged
The roller of drivewheel 11, drivewheel 11 is provided with driving hydraulic motor 12.
Described workpiece 2 is arranged on underframe 1, including body 21, front and back gathering sill 22, front and back locator card orchid 23,
Left and right gathering sill 24, left and right locator card orchid 25, rig installing rack 26 and rig 27；Before and after body 21 is located at by cylindricality slip shoe frame
Direction be arranged on underframe 1 medial surface before and after on gathering sill 22；Front and back locator card blue 23 is connected with body 21 and is equipped with
On front and back's gathering sill 22, body 21 can pass through front and back gathering sill 22 and front and back locator card orchid 23 fore-and-aft direction on underframe 1
Move and location；Rig installing rack 26 is located at, by cylindricality slip shoe frame, the left and right that left and right directions is arranged on body 21 medial surface and leads
On groove 24；Left and right locator card blue 25 is connected with rig installing rack 26 and is equipped with on left and right gathering sill 24, rig installation
Frame 26 can be moved by left and right gathering sill 24 and left and right locator card orchid 25 and position by left and right directions on body 21；Rig 27 erects
Straight setting is arranged on rig installing rack 26.
Described device positioning element 4 includes that location supports bi-directional expansion hydraulic cylinder 41 and control valve group and pumping plant 42；By
In supporting cylinder be vertically arranged in support on the diagonal supporting leg of support body more firm, therefore location support bi-directional expansion hydraulic pressure
Cylinder 41 is set to four, four location support bi-directional expansion hydraulic cylinder 41 cylinder body centrosymmetry be vertically fixedly mounted on added 3 or
In underframe 1 diagonal positions, its piston end end is provided with support seat；Control valve group and pumping plant 42 are arranged on underframe 1 or added 3
On, the outfan of control valve group and pumping plant 42 is supported bi-directional expansion hydraulic cylinder 41 respectively and drives liquid by fluid pressure line with location
Pressure motor 12 connects.
Control to drive hydraulic motor 12 action to be moved at the bottom of four stud location by this coal mine self-moving by control valve group and pumping plant 43
Plate anchor rod drilling device stay in operation control valve group and pumping plant 42 after need to carrying out on the roadway floor of base plate boring make four fixed
Position supports that bi-directional expansion hydraulic cylinder about 41 is two-way stretches out, and location supports the support seat of bi-directional expansion hydraulic cylinder 41 and acts against top board
And on base plate, make underframe 1 form rigid support between back and base plate, then unclamp before and after's locator card blue 23 and left and right
Locator card orchid 25, locator card orchid 23 before and after locking after mobile body 21 to fore-and-aft direction needs the position of boring, then mobile brill
Lock left and right locator card orchid 25 after needing the position of boring on machine installing rack 26 to left and right directions, rig 27 the most just to bore position,
Start rig 27 carry out holing, during boring the drilling rod of rig 27 pierce base plate generation counteracting force installed by rig
Frame 26, body 21 act on underframe 1, and active force is supported bi-directional expansion hydraulic cylinder 41 by location and directly acts on lane by underframe 1
Road top board and base plate；It is drilled first Kong Houke and directly unclamps before and after's locator card blue 23 or left and right locator card orchid 25 carries out front and back
To or left and right directions on bore position adjust and realize the drilling operation of a row or string.
In order to realize this equipment can on fore-and-aft direction non-fully the roadway floor of level carry out vertical drilling, Jin Erzeng
The suitability of university degree equipment, as a further improvement on the present invention scheme, described body 21 passes through angle regulation positioning device
Is connected with front and back locator card blue 23, makes the drilling rod of rig 27 be perpendicular in the longitudinal direction by regulating angle regulation positioning device
The roadway floor of non-fully level and lock, vertical drilling can be realized.
In order to realize this equipment can on left and right directions non-fully the roadway floor of level carry out vertical drilling, Jin Erzeng
The suitability of university degree equipment, as a further improvement on the present invention scheme, described rig installing rack 26 is fixed by angular adjustment
Position mechanism is connected with left and right locator card blue 25, makes the drilling rod of rig 27 be perpendicular in left and right by regulation angle regulation positioning device
The roadway floor of the non-fully level on direction also locks, and can realize vertical drilling.
In order to alleviate the overall weight of whole device so that moving, scheme as a further improvement on the present invention, described
Underframe 1 and added 3 be all frame structure.
In order to increase the integrated support intensity of this equipment, scheme as a further improvement on the present invention, described underframe 1
And/or the frame structure two sides of added 3 are provided with supporting rib stiffener arranged in a crossed manner.
This coal mine self-moving moves four stud location base plate anchor rod drilling devices owing to being provided with added 3 be arranged on underframe 1, fixed
Position supports bi-directional expansion hydraulic cylinder 41 and control valve group and pumping plant 42 be arranged on added 3 or underframe 1 on, be therefore manipulated by
Valve group and pumping plant 42 make four location support bi-directional expansion hydraulic cylinder about 41 is two-way stretches out, location supports bi-directional expansion hydraulic cylinder
The support seat of 41 acts against and makes underframe 1 form stable rigid support between back and base plate on top board and base plate, bores
During hole, the drilling rod of rig 27 pierces the counteracting force that base plate produces and acts on underframe 1, the end by rig installing rack 26, body 21
Active force is supported bi-directional expansion hydraulic cylinder 41 by location and directly acts on back and base plate by frame 1, therefore need not
It is supported on back to provide reverse holding power with pin or reverse air leg above the drilling rod of rig 27；Due to workpiece
2 are provided with before and after's gathering sill 22, front and back locator card orchid 23, left and right gathering sill 24, left and right locator card orchid 25, therefore by this base plate anchor pole
Steady boring device can realize pinpointing a position after having good positioning can complete the multiple rows of or operation in multiple row hole, i.e. can realize rig
27 front and back, the bore position of all full lines in gathering sill 22 and left and right gathering sill 24 stroke range and permutation carries out spitting drill
Hole；This coal mine self-moving moves four stud location base plate anchor rod drilling device simple in construction, easily operated control, after completing boring
Carry out rockbolt installation, hole and the speed of anchor pole, installation effectiveness height are installed, being adapted to the requirement of Quick Road-Made, the suitableeest
The Quick mounting anchor rod of floor bolting is used during for Floor Heave in Roadway is administered.
Claims (5)
1. coal mine self-moving moves four stud location base plate anchor rod drilling devices, including rig (27), it is characterised in that also include
Underframe (1), workpiece (2), added (3) and device positioning element (4)；
Described added (3) are fixedly mounted on underframe (1), and underframe (1) bottom is provided with and at least includes that one group of coaxial direction is arranged
The roller of drivewheel (11), drivewheel (11) is provided with driving hydraulic motor (12)；
Described workpiece (2) is arranged on underframe (1), blue including body (21), front and back gathering sill (22), front and back locator card
(23), left and right gathering sill (24), left and right locator card blue (25), rig installing rack (26) and rig (27)；Body (21) passes through post
Shape slip shoe frame is located at before and after fore-and-aft direction is arranged on underframe (1) medial surface on gathering sill (22)；Front and back locator card is blue (23)
It is connected with body (21) and is equipped with on front and back's gathering sill (22)；Rig installing rack (26) is located at a left side by cylindricality slip shoe frame
Right direction is arranged on the left and right gathering sill (24) on body (21) medial surface；Left and right locator card blue (25) and rig installing rack
(26) connect and be equipped with on left and right gathering sill (24)；Described rig (27) is vertically arranged and is arranged on rig installing rack
(26) on；
Described device positioning element (4) includes that location supports bi-directional expansion hydraulic cylinder (41) and control valve group and pumping plant (42)；
Location supports bi-directional expansion hydraulic cylinder (41) and is set to four, and four location support bi-directional expansion hydraulic cylinder (41) cylinder body center pair
Claiming vertically to be fixedly mounted in added (3) or underframe (1) diagonal positions, its piston end end is provided with support seat；Control valve group
And pumping plant (42) is arranged on underframe (1) or added (3), the outfan of control valve group and pumping plant (42) is by fluid pressure line respectively
Support bi-directional expansion hydraulic cylinder (41) with location and drive hydraulic motor (12) to be connected.
Coal mine self-moving the most according to claim 1 moves four stud location base plate anchor rod drilling devices, it is characterised in that described
Body (21) be connected with front and back locator card orchid (23) by angle regulation positioning device.
Coal mine self-moving the most according to claim 1 and 2 moves four stud location base plate anchor rod drilling devices, it is characterised in that
Described rig installing rack (26) is connected with left and right locator card blue (25) by angle regulation positioning device.
Coal mine self-moving the most according to claim 3 moves four stud location base plate anchor rod drilling devices, it is characterised in that described
Underframe (1) and added (3) be all frame structure.
Coal mine self-moving the most according to claim 4 moves four stud location base plate anchor rod drilling devices, it is characterised in that described
Underframe (1) and/or the frame structure two sides of added (3) be provided with supporting rib stiffener arranged in a crossed manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610584232.5A CN106089072A (en) | 2016-07-22 | 2016-07-22 | A kind of coal mine self-moving moves four stud location base plate anchor rod drilling devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610584232.5A CN106089072A (en) | 2016-07-22 | 2016-07-22 | A kind of coal mine self-moving moves four stud location base plate anchor rod drilling devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106089072A true CN106089072A (en) | 2016-11-09 |
Family
ID=57450144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610584232.5A Pending CN106089072A (en) | 2016-07-22 | 2016-07-22 | A kind of coal mine self-moving moves four stud location base plate anchor rod drilling devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106089072A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206492A (en) * | 2019-06-25 | 2019-09-06 | 河南力行科创矿山技术开发有限公司 | Combined walking device of mining roof cutting drilling machine and using method thereof |
| CN110578475A (en) * | 2019-09-21 | 2019-12-17 | 中建七局安装工程有限公司 | Small-size engineering drill support |
-
2016
- 2016-07-22 CN CN201610584232.5A patent/CN106089072A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206492A (en) * | 2019-06-25 | 2019-09-06 | 河南力行科创矿山技术开发有限公司 | Combined walking device of mining roof cutting drilling machine and using method thereof |
| CN110206492B (en) * | 2019-06-25 | 2023-10-24 | 河南力行科创矿山技术开发有限公司 | Combined stepping device of mining top cutting drill and use method thereof |
| CN110578475A (en) * | 2019-09-21 | 2019-12-17 | 中建七局安装工程有限公司 | Small-size engineering drill support |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161109 |
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| WD01 | Invention patent application deemed withdrawn after publication |