CN206329339U - Coal mining system - Google Patents
Coal mining system Download PDFInfo
- Publication number
- CN206329339U CN206329339U CN201621448093.5U CN201621448093U CN206329339U CN 206329339 U CN206329339 U CN 206329339U CN 201621448093 U CN201621448093 U CN 201621448093U CN 206329339 U CN206329339 U CN 206329339U
- Authority
- CN
- China
- Prior art keywords
- eye
- coal
- wind
- working face
- enter
- 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.)
- Active
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model provides a kind of coal mining system, the coal mining system is used for the exploitation of half-edge coal seam, including working face, enter the eye of wind and return air eye, working face is to be horizontally orientated to, and working face has the space width for being available for coal-cutting machinery to mine, enter the eye of wind to be connected between working face and coal flowing channel, enter incline direction of the eye of wind along half-edge coal seam to set, and it is vertical with the direction of working face to enter the eye of wind, return air eye be connected between working face and coal flowing channel, and return air eye and enter the eye of wind be located at working face not homonymy.Therefore, the coal mining system that the utility model is provided can realize comprehensive mechanical coal mining, improve coal mining efficiency, and reduction exploitation labor intensity improves production safety, is easy to management service.Solve low currently for the big efficiency of steeply-inclined seam mining difficulty, coal seam passage ventilation condition is poor, the problem of safety management difficulty is big.
Description
Technical field
The utility model is related to seam mining technical field, more particularly to a kind of coal mining system.
Background technology
It is larger that half-edge coal seam reserves account for the rare coal accounting such as the 40% of coal in China gross reserves, and coking coal, anthracite,
Ature of coal is excellent, is the essential raw material of the industries such as metallurgy, chemical industry.Therefore, the research of steeply-inclined seam mining method is to China
Coal Industry Sustainable Development is significant.
At present in the coal-mining method of half-edge coal seam, the super high seam that can be exploited using level or inclined cuting layering.Remove
Outside this, both at home and abroad all without half-edge coal seam of the thickness below 8 meters is thoroughly solved, production efficiency is low, labor intensity is big, peace
The problem of full management hardly possible.And in the coal-mining method for exploiting such coal seam comparative maturity, it is most preferably pseudo- oblique using most, effect
Metal flexible shield mining, it along half-edge coal seam is production face that it, which is, and coal cinder after exploitation is transported along seam inclination face
To going out breeching.
But, currently for the recovery method of half-edge coal seam, due to the limitation of seam inclination angle, it is difficult to realize mechanization
, there is the problem of ten thousand tons of drivage ratios are high in operation;Exploit face-airing condition poor, be unfavorable for staff's long-term operation;Due to
Ventilation condition is poor, therefore equally exists the problem of Gas Disaster preventing and treating is difficult, it is impossible to change that production efficiency is low, labor intensity is big,
The difficult actual conditions of safety management.
Utility model content
A kind of coal mining system that the utility model is provided, can realize comprehensive mechanical coal mining, improve coal mining efficiency, and reduction is opened
Labor intensity is adopted, production safety is improved, is easy to management service.Solve currently for the big efficiency of steeply-inclined seam mining difficulty
Low, coal seam passage ventilation condition is poor, the problem of safety management difficulty is big.
The utility model provides a kind of coal mining system, for the exploitation of half-edge coal seam, including working face, enters the eye of wind and return
The eye of wind.
Working face is is horizontally orientated to, and working face has the space width for being available for coal-cutting machinery to mine.
Enter the eye of wind to be connected between working face and coal flowing channel, enter incline direction of the eye of wind along half-edge coal seam and set, and
Enter the eye of wind vertical with the direction of working face.
Return air eye be connected between working face and coal flowing channel, and return air eye and enter the eye of wind be located at working face not homonymy.
In above-mentioned coal mining system, it is preferred that the direction of propulsion of working face is the incline direction along half-edge coal seam
Promote from top to bottom.
In above-mentioned coal mining system, it is preferred that entering the eye of wind includes being available for the first of pedestrian's discrepancy enter the eye of wind, be available for adopting
What coal machinery came in and went out second enters the eye of wind and enters the eye of wind available for the 3rd produced coal, and first enters the eye of wind, second enters the eye of wind and the 3rd and enter
The eye of wind is mutually parallel.
In above-mentioned coal mining system, it is preferred that also including air intake communicating passage, air intake communicating passage is connected to first
Enter the eye of wind, second enter the eye of wind and the 3rd and enter between the eye of wind.
In above-mentioned coal mining system, it is preferred that first enters the eye of wind, second enters the eye of wind and the 3rd and enter on the eye of wind to be respectively provided with
There is protection eye-cap to be opened/closed.
In above-mentioned coal mining system, it is preferred that the quantity of return air eye is multiple.
In above-mentioned coal mining system, it is preferred that be provided with return air communicating passage between adjacent return air eye.
In above-mentioned coal mining system, it is preferred that the coal-cutting machinery mined on working face includes three-dimensional cutting coal machine, two
Tie up flexible flightconveyor and three-dimensional chock shield.
In above-mentioned coal mining system, it is preferred that working face is the working face that top board is managed using whole caving methods.
By being set to working face to be horizontally orientated in the coal mining system that the utility model is provided, the coal mining system, it is easy to
Coal-cutting machinery is installed and operated, and realizes comprehensive mechanical coal mining;Using the three-dimensional cutting coal machine in coal-cutting machinery, bidimensional is flexible scrapes
Plate conveyer and three-dimensional chock shield cooperating, improve coal mining efficiency, reduce in tradition exploitation work, with manpower
Based on exploitation labor intensity;Production safety is improved, is easy to management service.Solve currently for steeply-inclined seam mining difficulty
Big efficiency is low, and coal seam passage ventilation condition is poor, the problem of safety management difficulty is big.
Brief description of the drawings
Fig. 1 is the structural representation for the coal mining system that the utility model embodiment one is provided;
Fig. 2 is the part A detail view for Fig. 1 that the utility model embodiment one is provided;
Fig. 3 is the section B-B figure for Fig. 2 that the utility model embodiment one is provided;
Fig. 4 is the schematic flow sheet for the coal-mining method that the utility model embodiment two is provided.
Description of reference numerals:
1- working faces;2- enters the eye of wind;3- return air eye;
4- coal-cutting machineries;5- coal flowing channels;6- coal seams;
7- goafs;21- first enters the eye of wind;22- second enters the eye of wind;
23- the 3rd enters the eye of wind;24- air intake communicating passages;25- protects eye-cap;
31- return air communicating passages;41- three-dimensional cutting coal machines;42- bidimensional flexible flightconveyors;
43- three-dimensional chock shields;The rotatable chutes of 411-.
Embodiment
To make the purpose of this utility model, technical scheme and advantage clearer, implement below in conjunction with the utility model
Accompanying drawing in example, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described reality
It is a part of embodiment of the utility model to apply example, rather than whole embodiments.Based on the embodiment in the utility model, ability
The every other embodiment that domain those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality new
The scope of type protection.
Fig. 1 is the structural representation for the coal mining system that the utility model embodiment one is provided, and Fig. 2 is implemented for the utility model
The part A detail view for Fig. 1 that example one is provided, Fig. 3 is the section B-B figure for Fig. 2 that the utility model embodiment one is provided.
As shown in Figure 1-Figure 3, the utility model embodiment one provides a kind of coal mining system, for opening for half-edge coal seam
Adopt, including working face 1, enter the eye of wind and return air eye 3.
Working face 1 is is horizontally orientated to, and working face 1 has the space width for being available for coal-cutting machinery 4 to mine.
Enter the eye of wind to be connected between working face 1 and coal flowing channel 5, enter incline direction of the eye of wind along half-edge coal seam and set,
And it is vertical with the direction of working face 1 to enter the eye of wind.
Return air eye 3 is connected between working face 1 and coal flowing channel 5, and return air eye 3 is located at working face 1 not with the eye of wind is entered
Homonymy.
It should be noted that the coal mining system that the utility model embodiment one is provided, mainly for opening for half-edge coal seam
Adopt.By the way that working face 1 to be set to be horizontally orientated to, it is easy to coal-cutting machinery 4 to install and operate.Mined using coal-cutting machinery 4
Coal mining efficiency, the traditional coal work intensity of reduction can be improved.
Specifically, in the coal mining system, being additionally provided with into the eye of wind and return air eye 3, enter the eye of wind and return air eye 3 each along urgency
The incline direction of inclined seam is set, and enters the eye of wind and return air eye 3 is preferably vertical with working face 1.Enter eye of wind connection working face 1
With coal flowing channel 5, return air eye 3 is with entering the both sides that the eye of wind is oppositely arranged on working face 1, return air eye 3 equally connection working face 1 and fortune
Coal channel 5.It is interconnected by entering the eye of wind, working face 1, return air eye 3 and coal flowing channel 5, adds the air permeability of each passage
Can, reduce the incidence of Gas Disaster.
It is preferred that, the direction of propulsion of working face 1 is to be promoted from top to bottom along the incline direction of half-edge coal seam.
It should be noted that the direction of propulsion of working face 1 of the coal mining system be along half-edge coal seam incline direction by
Under up to, from figure 1 it appears that working face 1 is located at the lower section of goaf 7, positioned at the top of coal seam 6.The working face 1 is by along coal
6 incline direction of layer are advanced downwardly, and can complete the exploitation in coal seam 6 in the inclined plane.By the mining type of horizontal direction working face 1,
It can avoid in traditional coal-mining method, the incline direction by working face 1 along half-edge coal seam is set, and is difficult to realize mechanical mining
And the problem of be unfavorable for staff's personal safety.
It is preferred that, entering the eye of wind includes being available for the first of pedestrian's discrepancy enter the eye of wind 21, be available for the second of the discrepancy of coal-cutting machinery 4 to enter
The eye of wind 22 and enter the eye of wind 23 available for the 3rd produced coal, first enters the eye of wind 21, second enters the eye of wind 22 and the 3rd to enter the eye of wind 23 homogeneous
It is mutually parallel.
Enter the eye of wind 21 it should be noted that entering the eye of wind and being provided be available for pedestrian to come in and go out first, be available for coal-cutting machinery 4 to come in and go out
Second enter the eye of wind 22 and enter the eye of wind 23 available for the 3rd produced coal, first enters the eye of wind 21, second enters the air intake of the eye of wind 22 and the 3rd
Eye 23 is mutually parallel.Pedestrian, coal-cutting machinery 4 are transported respectively and the passage of coal charge transport is set respectively, on the one hand can be improved
The operating efficiency of whole coal mining system, it is to avoid in traditional coal mining system, goes out coal channel because of transport coal-cutting machinery 4 or walk
The problem of blocking.First enters the eye of wind 21, second enters the eye of wind 22 to enter the eye of wind 23 with the 3rd mutually parallel, be easy to management and after
Phase safeguards.On the other hand, it is separately provided for pedestrians first and enters the eye of wind 21, the personal safety of safeguard work personnel is reduced
The generation of Mine Disasters.
It is preferred that, in above-mentioned coal mining system, also enter the eye of wind 24 including the 3rd, the 3rd, which enters the eye of wind 24, is connected to first and enters
The eye of wind 21, second enter the eye of wind 22 and the 3rd and entered between the eye of wind 23.
It should be noted that entering the eye of wind 21 first, second entering the eye of wind 22 and the 3rd and enter the company of being additionally provided between the eye of wind 23
Meet three the 3rd enters the eye of wind 24, can increase by first and enter the eye of wind 21, second enters the performance of ventilating that the eye of wind 22 and the 3rd enters the eye of wind 23.
If occurring the situation that coal charge drops entering at the eye of wind, the 3rd, which enters the eye of wind 24, is also available for pedestrian, coal-cutting machinery 4 or coal charge in short-term
Between stop, it is ensured that coal mining system job safety.
It is preferred that, enter the eye of wind 21 first, second enter the eye of wind 22 and the 3rd and enter the eye of wind 23 at the eye mouth of working face 1,
The breach for parking coal-cutting machinery 4 is additionally provided with, is easy to staff to install and operate.
It is preferred that, first enters the eye of wind 21, second enters the eye of wind 22 and the 3rd and enter to be provided with protection to be opened/closed on the eye of wind 23
Eye-cap 25.
It should be noted that entering the eye of wind 21 first, second entering the eye of wind 22 and the 3rd and enter to be provided with and can open on the eye of wind 23
The protection eye-cap 25 closed, the protection eye-cap 25 is normally closed, when need someone, coal-cutting machinery 4 or coal charge by when can
Open, complete to recover closed mode after passing through.Protection eye-cap 25 can be dropped with the less coal charge of blocking volume, ensure operation peace
Entirely.
It is preferred that, the quantity of return air eye 3 is multiple.
It is preferred that, it is provided with return air communicating passage 31 between adjacent return air eye 3.
It should be noted that return air 3 quantity of eye are multiple, return air eye 3 is set to four in the present embodiment, and in reality
In production, corresponding increase and decrease can be done according to ventilation levels, the present embodiment is not limited to this.And in adjacent return air eye 3
Between be additionally provided with return air communicating passage 31, improve ventilation effect.
It is preferred that, windstone gate also can be set in part return air eye 3, the windstone gate is circular arc arch form section tunnel,
It can be used as the transport of ventilation, pedestrian, coal charge and coal-cutting machinery 4.
It is preferred that, the coal-cutting machinery 4 mined on working face 1 includes the flexible scraper plate conveying of three-dimensional cutting coal machine 41, bidimensional
Machine 42 and three-dimensional chock shield 43.
It should be noted that as shown in Figures 2 and 3, coal-cutting machinery 4 includes three-dimensional cutting coal machine 41, the flexible scraper plate of bidimensional
Conveyer 42 and three-dimensional chock shield 43.Wherein, three-dimensional cutting coal machine 41 be mainly used in the both sides of three-dimensional cutting coal machine 41 and
Slotting coal breakage is carried out in three directions below.Rotatable chute 411 is also associated with three-dimensional cutting coal machine 41, cooperation bidimensional can
Coal charge is transported to the 3rd to enter at 23 mouthfuls of the eye of wind by bending drag conveyor 42.Bidimensional flexible flightconveyor 42 is mainly flat
Row is in or perpendicular to transporting coal charge in the both direction of working face 1.Three-dimensional chock shield 43 is used for the top of working face 1
Support and shielding effect are provided on (i.e. the bottom of goaf 7), three directions in top board side and floor side, and can with mobile bidimensional
Bend the effect of drag conveyor 42.
Specifically, in the propulsion of three-dimensional cutting coal machine 41, a fixed number of the direction of propulsion front end of three-dimensional cutting coal machine 41 is packed up first
The three-dimensional chock shield 43 of amount, is easy to three-dimensional cutting coal machine 41 to advance and mine.When three-dimensional cutting coal machine 41 by after, again
Set up the three-dimensional chock shield 43 of the direction of propulsion rear end of three-dimensional cutting coal machine 41.The frame of the three-dimensional chock shield 43
Equipment, method is easy to the work of three-dimensional cutting coal machine 41, improves the flexibility ratio of coal work.
It is preferred that, working face 1 is the working face 1 that top board is managed using whole caving methods.
It should be noted that using whole caving method management top boards in working face 1.Top board is the top of working face 1
Support plate, it is connected with the bottom of goaf 7.Roof collapse is to occur falling accident in the inside ceiling panel rock of working face 1.To prevent top
Plate inbreak occurs, and in the present embodiment, after coal mining region is advanced into certain distance in working face 1, actively removes coal mining region
Three-dimensional chock shield 43 in addition, makes top board natural caving.With the propulsion of working region, at a certain distance again
Three-dimensional chock shield 43 and top board are set.Work can be reduced by being mined in the working face 1 of this roof controlling method
The control top area in face 1, and due to after roof caving fractured rock volumetric expansion can bashing 7, so as to mitigate working face 1
Pressure, prevents from producing harmful effect to working face 1.
The coal mining system that the utility model embodiment one is provided, by the way that working face 1 to be set to be horizontally orientated to, is easy to mine
Machinery 4 is installed and operated, and realizes comprehensive mechanical coal mining;Using the three-dimensional cutting coal machine 41 in coal-cutting machinery 4, bidimensional is flexible scrapes
Plate conveyer 42 and the cooperating of three-dimensional chock shield 43, improve coal mining efficiency, reduce in tradition exploitation work, with
Exploitation labor intensity based on manpower;Production safety is improved, is easy to management service.Solve currently for steeply-inclined seam mining
The big efficiency of difficulty is low, and the passage ventilation condition of coal seam 6 is poor, the problem of safety management difficulty is big.
Fig. 4 is the schematic flow sheet for the coal-mining method that the utility model embodiment two is provided, as Figure 1-Figure 4, this reality
A kind of coal-mining method is also provided with new embodiment two, applied to above-mentioned coal mining system, including:
S1:Coal seam 6 in the side that working face 1 is taken along along the working face 1 being horizontally orientated to, until the side coal seam 6 is taken
Finish;
S2:Using the coal seam 6 entered the eye of wind as starting point, take the opposite side of working face 1 of working face 1;
S3:The coal seam 6 of working face 1 is taken finish after, be displaced downwardly to along the incline direction of half-edge coal seam and move down working face 1;
Repeat the above steps S1-S3, until whole half-edge coal seam is taken and finished.
It should be noted that the both sides of working face 1 can carry out the side using circulation back production in coal work, the present embodiment
Method.S1 steps are carried out first, complete taking for side coal seam 6.Complete after S1 steps, three-dimensional cutting coal machine 41 is retracted into breach
Place, staff removes the side bidimensional flexible flightconveyor 42 in working face 1, is laid on opposite side, carries out S2
Step, completes opposite side coal seam 6 and takes.After the completion of taking work when the coal seam 6 of the working face 1, along the inclination of half-edge coal seam
Direction, which is displaced downwardly to, moves down working face 1, and the coal seam 6 for carrying out Adjacent Working Face 1 is taken, and completes S3 steps.S1 is repeated to S3 steps, can
Complete whole half-edge coal seam coal mining region takes work.
The coal-mining method that the utility model embodiment two is provided, the coal mining system provided using the utility model embodiment one
System, by the way that working face 1 to be set to be horizontally orientated to, is easy to coal-cutting machinery 4 to install and operate, realizes comprehensive mechanical coal mining;Profit
Coordinated with the three-dimensional cutting coal machine 41 in coal-cutting machinery 4, bidimensional flexible flightconveyor 42 and three-dimensional chock shield 43
Work.By using circulation back production, incline direction of the working face 1 along half-edge coal seam is from top to bottom promoted, and improves coal mining efficiency,
Reduce in tradition exploitation work, the exploitation labor intensity based on manpower improves production safety, is easy to production management and dimension
Shield.
Finally it should be noted that:Various embodiments above is only limited to illustrate the technical solution of the utility model, rather than to it
System;Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand:It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent;And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (9)
1. a kind of coal mining system, the exploitation for half-edge coal seam, it is characterised in that including working face, enter the eye of wind and return air eye;
The working face is is horizontally orientated to, and the working face has the space width for being available for coal-cutting machinery to mine;
It is described enter the eye of wind be connected between the working face and coal flowing channel, it is described enter incline direction of the eye of wind along half-edge coal seam
Set, and it is described enter the eye of wind it is vertical with the direction of the working face;
Return air eye is connected between the working face and the coal flowing channel, and return air eye and it is described enter the eye of wind be located at
The not homonymy of the working face.
2. coal mining system according to claim 1, it is characterised in that the direction of propulsion of the working face is to incline along the urgency
The incline direction in oblique coal seam is promoted from top to bottom.
3. coal mining system according to claim 1, it is characterised in that it is described enter the eye of wind include being available for pedestrian to come in and go out first
Enter the eye of wind, be available for the second of coal-cutting machinery discrepancy to enter the eye of wind and enter the eye of wind available for the 3rd produced coal, described first enters the eye of wind, institute
Second is stated to enter the eye of wind to enter the eye of wind with the described 3rd mutually parallel.
4. coal mining system according to claim 3, it is characterised in that also including air intake communicating passage, the air intake connection
Passage is connected to described first and enters the eye of wind, described second enters the eye of wind and the described 3rd and enter between the eye of wind.
5. coal mining system according to claim 4, it is characterised in that described first enter the eye of wind, described second enter the eye of wind and
Described 3rd enters on the eye of wind to be provided with protection eye-cap to be opened/closed.
6. coal mining system according to claim 1 or 2, it is characterised in that the quantity of the return air eye is multiple.
7. coal mining system according to claim 6, it is characterised in that be provided with return air connection between the adjacent return air eye
Passage.
8. coal mining system according to claim 1 or 2, it is characterised in that the coal mining mined on the working face
Machinery includes three-dimensional cutting coal machine, bidimensional flexible flightconveyor and three-dimensional chock shield.
9. coal mining system according to claim 1 or 2, it is characterised in that the working face is using whole caving method pipes
Manage the working face of top board.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201621426214 | 2016-12-23 | ||
CN2016214262146 | 2016-12-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN206329339U true CN206329339U (en) | 2017-07-14 |
Family
ID=59292643
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201621448093.5U Active CN206329339U (en) | 2016-12-23 | 2016-12-27 | Coal mining system |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN206329339U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106545340A (en) * | 2016-12-23 | 2017-03-29 | 平安煤炭开采工程技术研究院有限责任公司 | Coal mining system and coal-mining method |
-
2016
- 2016-12-27 CN CN201621448093.5U patent/CN206329339U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106545340A (en) * | 2016-12-23 | 2017-03-29 | 平安煤炭开采工程技术研究院有限责任公司 | Coal mining system and coal-mining method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104088643B (en) | A kind of high-dipping point blank coal seam Sub-Level Caving coal-mining method | |
CN105065001B (en) | A kind of gob side entry driving recovery method of overlength advance distance working face | |
WO2020062432A1 (en) | Underground mining, sorting, and filling coordinated mining method for close-range coal seam cluster | |
CN104100270B (en) | A kind of low-angle dip mineral ore Truckless mining method | |
CN103821515B (en) | A kind of double face filling coal mining technique | |
CN105298496B (en) | Complete adopt of reserved working face coal column is set to fill coal-mining method entirely | |
EP3998394B1 (en) | Method for coal mining without reserving coal pillar and tunneling roadway in whole mining area | |
CN102865092B (en) | U+U type laneway ventilating system of coalface | |
CN103089266A (en) | Drift-pillar-free sublevel barnyard caving mining method of open pit transferred underground transitional period | |
CN103195457A (en) | Supporting method for roadway fully-mechanized drivage operation without withdrawal of roadheader | |
CN109236363A (en) | A kind of shortwall block formula filling coal mining method | |
CN106499396B (en) | Medium-thickness slowly-inclined waste rock-containing interlayer ore body room-column mining method | |
CN110714760B (en) | Mining method for coal-aluminum symbiotic layered induction collaborative mining | |
CN103527196A (en) | Method for recovery of room-type coal pillar through loess filling | |
CN108194084A (en) | Outdoor end side ore deposit continuous miner end side recovery method | |
CN105927269A (en) | Gas control method of outburst coal seam | |
CN110410076A (en) | A kind of filling mining method for leaving Pillar Recovery for old pillars of a house goaf | |
CN108412494A (en) | A kind of long-armed longitudinally oriented strip belt paste body filling process for stoping | |
CN107503790B (en) | Fast extraction fully mechanized coal face comprehensive gas drainage arranges administering method | |
CN103174424B (en) | Breast and pillar method under long-wall arrangement | |
CN104343453B (en) | Thick mineral deposit filling mining method in a kind of low-angle dip | |
CN206329339U (en) | Coal mining system | |
CN105201508A (en) | Backstoping method for continuous miner under hard roof condition of thick coal seam | |
CN104329117B (en) | Installation method of comprehensive mechanized filling, coal mining and open-off cutting equipment | |
CN113944464B (en) | Coal mining method of corner coal full-negative-pressure continuous miner |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |