CN106150370A - A kind of underground coal mine is from the steady boring device of movable base plate anchor pole - Google Patents

A kind of underground coal mine is from the steady boring device of movable base plate anchor pole Download PDF

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Publication number
CN106150370A
CN106150370A CN201610619834.XA CN201610619834A CN106150370A CN 106150370 A CN106150370 A CN 106150370A CN 201610619834 A CN201610619834 A CN 201610619834A CN 106150370 A CN106150370 A CN 106150370A
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CN
China
Prior art keywords
positioning
underframe
guide groove
locking nut
base plate
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
Application number
CN201610619834.XA
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Chinese (zh)
Inventor
耿志国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xuzhou Naili Macromolecule Technology Co Ltd
Original Assignee
Xuzhou Naili Macromolecule Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Xuzhou Naili Macromolecule Technology Co Ltd filed Critical Xuzhou Naili Macromolecule Technology Co Ltd
Priority to CN201610619834.XA priority Critical patent/CN106150370A/en
Publication of CN106150370A publication Critical patent/CN106150370A/en
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
    • E21B7/024—Drilling rigs characterized 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 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

Abstract

The invention discloses a kind of underground coal mine from the steady boring device of movable base plate anchor pole, including underframe (1), workpiece (2), added (3) and device positioning element (4)；It added is fixedly mounted on underframe；Workpiece is arranged on underframe, including body (21), front and back guide groove (22), front and back positioning and locking nut (23), left and right guide groove (24), left and right positioning and locking nut (25), rig installing rack (26) and rig (27)；Device positioning element includes that positioning supports bi-directional expansion hydraulic cylinder (41) and control valve group and pumping plant (42), and two pieces positioning support bi-directional expansion hydraulic cylinder body is symmetrical to be vertically fixedly mounted on the added or centre position of underframe fore-and-aft direction.This underground coal mine quickly carries out drilling operation, the overall rockbolt installation speed that improves, the requirement of adaptation Quick Road-Made on the premise of the steady boring device of movable base plate anchor pole can provide reverse holding power in boring procedure to roadway floor.

Description

A kind of underground coal mine is from the steady boring device of movable base plate anchor pole
Technical field
The present invention relates to a kind of drilling equipment, specifically one is applicable to underground coal mine and carries out anchor pole of holing to roadway floor The underground coal mine of supporting, from the steady boring device of movable base plate anchor pole, belongs to down-hole support equipment technical field.
Background technology
Due to the difference of the self-characteristic of different depth rock mass and residing ambient stress around tunnel, transported by geologic rhythm The factor impacts such as dynamic, ground water pressure, country rock easily produces Incoordinate deformation, especially for underground coal mine exploitation, 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 Referred to as pucking, pucking is a kind of dynamic phenomenon often occurring in roadway, the character of it and 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, underground water hydraulic pressure is high, strength of turbulence is high, danger of burst The deep-seated setting of the features such as height, creep is obvious, deformation is big, high stress and soft rock mine roadway and chamber, 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 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 improving 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., suspension roof support is being used to base plate Needing during operation first to hole base plate, conventional method need to be supported by pin or reverse air leg in boring procedure above drilling rod On back, providing 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, simultaneously 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.
Content of the invention
For the problems referred to above, the present invention provides a kind of underground coal mine from the steady boring device of movable base plate anchor pole, simple in construction, energy Realize the quick drilling operation that carries out roadway floor on the premise of reverse holding power is enough provided in boring procedure, and then entirety carries High rockbolt installation speed, is adapted to the requirement of Quick Road-Made.
For achieving the above object, this underground coal mine includes underframe, workpiece, added from the steady boring device of movable base plate anchor pole With 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, driving wheel is provided with driving hydraulic motor；
Described workpiece is arranged on underframe, including body, front and back guide groove, front and back positioning and locking nut, a left side Right guide groove, left and right positioning and locking nut, rig installing rack and rig；Body is rectangle frame structure, and both ends of the surface are led to around Cross and be positioned at the cylindricality slip shoe frame of end face central authorities and be located at before and after fore-and-aft direction is arranged on underframe medial surface on guide groove, be provided with The end of the cylindricality piston shoes of screw thread passes through guide groove front and back；Front and back positioning and locking nut coordinates with the end thread of cylindricality piston shoes And be pressed on the lateral surface of before and after's guide groove；Before and after rig installing rack, both ends of the surface are located at right and left by cylindricality slip shoe frame On the left and right guide groove being arranged on body medial surface, if the end of threaded cylindricality piston shoes passes through left and right and guides logical Groove；Left and right positioning and locking nut coordinates with the end thread of cylindricality piston shoes and is pressed on the lateral surface of left and right guide groove；Institute The rig stated is vertically arranged and is arranged on rig installing rack；
Described device positioning element includes that positioning supports bi-directional expansion hydraulic cylinder and control valve group and pumping plant；Positioning supports Bi-directional expansion hydraulic cylinder is set to two pieces, and two pieces positioning supports that bi-directional expansion hydraulic cylinder body is symmetrical to be vertically fixedly mounted on On the added or centre position of underframe fore-and-aft direction, its piston end end is provided with support seat；Control valve group and pumping plant are arranged on the end Frame or added on, the output of control valve group and pumping plant supports bi-directional expansion hydraulic cylinder and driving with positioning respectively by fluid pressure line Hydrodynamic pressure motor 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.
Scheme as a further improvement on the present invention, positioning and locking nut and left and right positioning and locking spiral shell before and after described positioning It is radially provided with handle on mother.
Scheme as a further improvement on the present invention, described before and after positioning and locking nut inner face with front and back guide logical Between the inner face of between the lateral surface of groove and left and right positioning and locking nut and the lateral surface of left and right guide groove, ecto-entad depends on It secondary is provided with spring washer and plain washer.
Compared with prior art, this underground coal mine is arranged on underframe owing to being provided with from the steady boring device of movable base plate anchor pole Added, positioning supports bi-directional expansion hydraulic cylinder and control valve group and pumping plant is arranged on added or underframe, is therefore controlled by operation Valve group processed and pumping plant make positioning support bi-directional expansion hydraulic cylinder is two-way up and down stretches out, positioning supports the support of bi-directional expansion hydraulic cylinder Seat acts against and makes underframe form stable rigid support between back and base plate on top board and base plate, rig during boring Drilling rod pierce the reaction force that base plate produces and act on underframe by rig installing rack, body, underframe by active force by fixed Position supports bi-directional expansion hydraulic cylinder and directly acts on back and base plate, does not therefore need to use pin above the drilling rod of rig Or reversely air leg is supported on back to provide reverse holding power；Owing to workpiece is provided with before and after's guide groove, front and back Therefore this underground coal mine is surely bored by positioning and locking nut, left and right guide groove, left and right positioning and locking nut from movable base plate anchor pole Device can realize after having good positioning that pinpointing a position can complete multiple rows of or multiple row hole operation, and rig i.e. can be realized front The bore position of all full lines in rear guide groove and left and right guide groove stroke range and permutation carries out positioning boring；Due to It between body and underframe, between rig installing rack and body, is equipped with cylindricality piston shoes, therefore can realize to fore-and-aft direction or a left side In right direction, non-fully the roadway floor of level carries out vertical drilling；This underground coal mine is from movable base plate anchor pole steady boring device structure Simply, easily operated control, can carry out rockbolt installation after completing boring, the speed of boring and installation anchor pole, installation effect Rate is high, is adapted to the requirement of Quick Road-Made, uses the quick peace of floor bolting when being particularly well-suited to administer Floor Heave in Roadway Dress anchor pole.
Brief description
Fig. 1 is the three-dimensional structure schematic diagram of the present invention；
Fig. 2 is the attachment structure schematic diagram of guide groove and front and back positioning and locking nut before and after the present invention.
In figure: the 1st, underframe, the 11st, driving wheel, the 12nd, drive hydraulic motor, the 2nd, workpiece, the 21st, body, the 22nd, front and back guide Groove, the 23rd, front and back positioning and locking nut, the 24th, left and right guide groove, the 25th, left and right positioning and locking nut, the 26th, rig installing rack, 27th, rig, the 3rd, added, the 4th, device positioning element, the 41st, positioning supports bi-directional expansion hydraulic cylinder, the 42nd, control valve group and pumping plant.
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 underground coal mine includes the 2nd, added 3 and of underframe the 1st, workpiece from the steady boring device of movable base plate anchor pole 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 driving wheel 11, driving wheel 11 is provided with driving hydraulic motor 12.
Described workpiece 2 is arranged on underframe 1, including body the 21st, front and back guide groove the 22nd, front and back positioning and locking spiral shell Female 23rd, left and right guide groove the 24th, left and right positioning and locking nut the 25th, rig installing rack 26 and rig 27；Body 21 is rectangle frame knot Structure, both ends of the surface are located at fore-and-aft direction are arranged on underframe 1 medial surface by being positioned at the cylindricality slip shoe frame of end face central authorities around Front and back on guide groove 22, if the end of threaded cylindricality piston shoes passes through guide groove 22 front and back, body 21 can pass through post Shape piston shoes movable or along cylindricality piston shoes axle center on front and back's guide groove 22 rotates and changes angle；As in figure 2 it is shown, it is front Rear positioning and locking nut 23 coordinates with the end thread of cylindricality piston shoes and is pressed on the lateral surface of before and after's guide groove 22, body By unclamping or screwing before and after's positioning and locking nut 23,21 can realize that fore-and-aft direction moves or positions on underframe 1；Rig is pacified Shelve both ends of the surface before and after 26 to be located at, by cylindricality slip shoe frame, the left and right that left and right directions is arranged on body 21 medial surface and guide logical On groove 24, if the end of threaded cylindricality piston shoes passes through left and right guide groove 24, rig installing rack 26 can be sliding by cylindricality Boots move left and right on left and right guide groove 24 or along cylindricality piston shoes axle center rotate change angle；Left and right positioning and locking nut 25 coordinate with the end thread of cylindricality piston shoes and are pressed on the lateral surface of left and right guide groove 24, and rig installing rack 26 can lead to Cross and unclamp or screw left and right positioning and locking nut 25 and realize that left and right directions moves or positions on body 21；Rig 27 is vertically arranged It is arranged on rig installing rack 26.
Described device positioning element 4 includes that positioning supports bi-directional expansion hydraulic cylinder 41 and control valve group and pumping plant 42；Fixed Position supports bi-directional expansion hydraulic cylinder 41 and is set to two pieces, and it is symmetrical vertically that two pieces positioning supports bi-directional expansion hydraulic cylinder 41 cylinder body Be fixedly mounted on added 3 or underframe 1 fore-and-aft direction centre position on, its piston end end is provided with support seat；Control valve group and Pumping plant 42 is arranged on underframe 1 or added 3, and the output of control valve group and pumping plant 42 is supported with positioning respectively by fluid pressure line Bi-directional expansion hydraulic cylinder 41 and driving hydraulic motor 12 connect.
Being controlled by control valve group and pumping plant 43 drives hydraulic motor 12 action by this underground coal mine from movable base plate anchor pole Steady boring device stays in and need to carry out operational control valve group and pumping plant 42 after on the roadway floor of base plate boring to make positioning support two-way Telescopic hydraulic cylinder is two-way about 41 to be stretched out, and the support seat of positioning support bi-directional expansion hydraulic cylinder 41 acts against and makes on top board and base plate Underframe 1 forms rigid support between back and base plate, then unclamps before and after's positioning and locking nut 23 and left and right positioning lock Jack panel 25, positioning and locking nut 23 before and after locking behind the position that mobile body 21 to fore-and-aft direction needs boring, then moves Needing locking left and right positioning and locking nut 25 behind the position of boring on rig installing rack 26 to left and right directions, rig 27 is i.e. just to boring Position, starts rig 27 and carries out holing, and the setting of cylindricality piston shoes can realize to non-complete on fore-and-aft direction or left and right directions The roadway floor of full level carries out vertical drilling, and during boring, the drilling rod of rig 27 pierces the reaction force of base plate generation by boring Machine installing rack the 26th, body 21 acts on underframe 1, and active force is supported bi-directional expansion hydraulic cylinder 41 by positioning and directly makees by underframe 1 For back and base plate；It is drilled first Kong Houke and directly unclamp before and after's positioning and locking nut 23 or left and right positioning and locking spiral shell Female 25 bore positions carrying out on fore-and-aft direction or left and right directions adjust the drilling operation realizing a row or row.
In order to mitigate the overall weight of whole device in order to move, 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.
In order to realize not using additional means quickly to screw or unclamp positioning and locking nut 23 and left and right positioning before and after positioning Locking nut 25, as a further improvement on the present invention scheme, positioning and locking nut 23 and left and right positioning before and after described positioning It is radially provided with handle, before and after can realizing manually quickly screwing or unclamping positioning by rotary handle on locking nut 25 Positioning and locking nut 23 and left and right positioning and locking nut 25.
In order to prevent before and after the positioning after screwing positioning and locking nut 23 and left and right positioning and locking nut 25 at boring procedure Middle loosen because of vibration, scheme as a further improvement on the present invention, described before and after positioning and locking nut 23 inner face with Between the lateral surface of the guide groove 22 and outside of inner face and left and right guide groove 24 of left and right positioning and locking nut 25 front and back Between face, ecto-entad is sequentially provided with spring washer and plain washer.
This underground coal mine is from the steady boring device of movable base plate anchor pole owing to being provided with added 3 being arranged on underframe 1, and positioning 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 positioning support bi-directional expansion hydraulic cylinder is two-way about 41 stretches out, positioning supports the support seat of bi-directional expansion hydraulic cylinder 41 Act against and on top board and base plate, make underframe 1 form stable rigid support between back and base plate, rig during boring The reaction force that the drilling rod of 27 pierces base plate generation acts on underframe 1 by rig installing rack the 26th, body 21, and underframe 1 will act on Power supports bi-directional expansion hydraulic cylinder 41 by positioning and directly acts on back and base plate, does not therefore need the brill at rig 27 It is supported on back with pin or reverse air leg to provide reverse holding power above bar；Before and after being provided with due to workpiece 2 Guide groove the 22nd, front and back positioning and locking nut the 23rd, left and right guide groove the 24th, left and right positioning and locking nut 25, therefore by this colliery Down-hole can realize that after the steady boring device of movable base plate anchor pole is had good positioning pinpointing a position can complete multiple rows of or multiple row hole Operation, i.e. can realize all full lines in front and back's guide groove 22 and left and right guide groove 24 stroke range for the rig 27 and whole The bore position of row carries out positioning boring；Owing between body 21 and underframe 1, being equipped with between rig installing rack 26 and body 21 Cylindricality piston shoes, therefore can realize on fore-and-aft direction or left and right directions non-fully the roadway floor of level carry out vertical drilling； This underground coal mine, from movable base plate anchor pole steady boring device simple in construction, easily operated control, can carry out anchor pole after completing boring Installing, speed, the installation effectiveness of boring and installation anchor pole are high, are adapted to the requirement of Quick Road-Made, are particularly well-suited to lane The Quick mounting anchor rod of floor bolting is used when road pucking is administered.

Claims (5)

1. underground coal mine is from the steady boring device of movable base plate anchor pole, 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 driving wheel (11), driving wheel (11) is provided with driving hydraulic motor (12)；
Described workpiece (2) is arranged on underframe (1), including body (21), front and back guide groove (22), front and back positioning lock Jack panel (23), left and right guide groove (24), left and right positioning and locking nut (25), rig installing rack (26) and rig (27)；This Body (21) is rectangle frame structure, and both ends of the surface are located at fore-and-aft direction are arranged on by being positioned at the cylindricality slip shoe frame of end face central authorities around Before and after on underframe (1) medial surface on guide groove (22), if the end of threaded cylindricality piston shoes passes through guide groove front and back (22)；Front and back positioning and locking nut (23) coordinates with the end thread of cylindricality piston shoes and is pressed on outside before and after's guide groove (22) On side；Before and after rig installing rack (26), both ends of the surface are located at left and right directions by cylindricality slip shoe frame and are arranged on body (21) inner side On left and right guide groove (24) on face, if the end of threaded cylindricality piston shoes passes through left and right guide groove (24)；Left and right is fixed Position locking nut (25) coordinates with the end thread of cylindricality piston shoes and is pressed on the lateral surface of left and right guide groove (24)；Described Rig (27) be vertically arranged and be arranged on rig installing rack (26)；
Described device positioning element (4) includes that positioning supports bi-directional expansion hydraulic cylinder (41) and control valve group and pumping plant (42)； Positioning supports bi-directional expansion hydraulic cylinder (41) and is set to two pieces, and it is right that two pieces positioning supports bi-directional expansion hydraulic cylinder (41) cylinder body left and right Claiming vertically to be fixedly mounted on the centre position of added (3) or underframe (1) fore-and-aft direction, its piston end end is provided with support seat； Control valve group and pumping plant (42) are arranged on underframe (1) or added (3), and the output of control valve group and pumping plant (42) passes through hydraulic pressure Pipeline supports bi-directional expansion hydraulic cylinder (41) respectively and drives hydraulic motor (12) to be connected with positioning.
2. underground coal mine according to claim 1 is from the steady boring device of movable base plate anchor pole, it is characterised in that described underframe And added (3) are all frame structures (1).
3. underground coal mine according to claim 2 is from the steady boring device of movable base plate anchor pole, it is characterised in that described underframe And/or the frame structure two sides of added (3) are provided with supporting rib stiffener arranged in a crossed manner (1).
4. the steady boring device of underground coal mine base plate anchor pole according to claim 1 or 2 or 3, it is characterised in that described positioning It front and back is radially provided with handle on positioning and locking nut (23) and left and right positioning and locking nut (25).
5. the steady boring device of underground coal mine base plate anchor pole according to claim 1 or 2 or 3, it is characterised in that before and after described Between the lateral surface of the inner face of positioning and locking nut (23) and front and back guide groove (22) and left and right positioning and locking nut (25) Inner face and the lateral surface of left and right guide groove (24) between ecto-entad be sequentially provided with spring washer and plain washer.
CN201610619834.XA 2016-07-30 2016-07-30 A kind of underground coal mine is from the steady boring device of movable base plate anchor pole Pending CN106150370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610619834.XA CN106150370A (en) 2016-07-30 2016-07-30 A kind of underground coal mine is from the steady boring device of movable base plate anchor pole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610619834.XA CN106150370A (en) 2016-07-30 2016-07-30 A kind of underground coal mine is from the steady boring device of movable base plate anchor pole

Publications (1)

Publication Number Publication Date
CN106150370A true CN106150370A (en) 2016-11-23

Family

ID=57328128

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610619834.XA Pending CN106150370A (en) 2016-07-30 2016-07-30 A kind of underground coal mine is from the steady boring device of movable base plate anchor pole

Country Status (1)

Country Link
CN (1) CN106150370A (en)

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Application publication date: 20161123

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