CN109184692A - A kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam - Google Patents

A kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam Download PDF

Info

Publication number
CN109184692A
CN109184692A CN201811345944.7A CN201811345944A CN109184692A CN 109184692 A CN109184692 A CN 109184692A CN 201811345944 A CN201811345944 A CN 201811345944A CN 109184692 A CN109184692 A CN 109184692A
Authority
CN
China
Prior art keywords
pseudo
coal
puppet
critical
oblique angle
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
CN201811345944.7A
Other languages
Chinese (zh)
Inventor
伍永平
郎丁
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.)
Xian University of Science and Technology
Original Assignee
Xian University of Science and Technology
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 Xian University of Science and Technology filed Critical Xian University of Science and Technology
Priority to CN201811345944.7A priority Critical patent/CN109184692A/en
Publication of CN109184692A publication Critical patent/CN109184692A/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C41/00—Methods of underground or surface mining; Layouts therefor
    • E21C41/16—Methods of underground mining; Layouts therefor
    • E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
    • E21C29/22—Propulsion of machines for slitting or completely freeing the mineral from the seam by wheels, endless tracks or the like
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00—Transport specially adapted to underground conditions
    • E21F13/04—Transport of mined material in gravity inclines; in staple or inclined shafts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Remote Sensing (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

The present invention relates to the critical pseudo- oblique angle comprehensive mechanical mining methods of half-edge coal seam, comprising the following steps: 1) when seam inclination α >=55 °, critical puppet oblique angle is determined as 45 °；2) arrangement of critical pseudo- inclined cut: the distance of the advanced haulage drift end in return aircourse end is equal with the pseudo- length l in slanting face true dip direction that bows, and forms that puppet bows slanting face and bearing direction is arranged in 45 °；3) it bows slanting face arrangement face timbering device and coal excavation apparatus in puppet, carries out fully-mechanized mining.The present invention solves the problems, such as the improvement that the back skating of winning apparatus and coal wall caving are carried out the present invention be directed to the drawbacks of pseudo- tiltedly arrangement of the working face of existing half-edge coal seam longwell fully-mechanized mining and working face equipment.

Description

A kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam
Technical field
The present invention is specific to technical field of coal exploitation, and in particular to a kind of critical pseudo- angle recovery method of half-edge coal seam.
Background technique
The pseudo- tiltedly arrangement of steeply pitching seam coal working face, can be changed steeply pitching seam is " slow oblique " or " inclination " working face mining, is mentioned The self-stability energy of height working face supporting and winning apparatus improves operating environment, improves working face efficiency and safety benefit.
The pseudo- tiltedly arrangement of working face, is one of common method of steeply-inclined seam mining, its advantage is that the pseudo- tiltedly arrangement of working face Working face inclination angle can be slowed down, be conducive to working face equipment anti-skid.Pseudo- tiltedly arrangement is divided into puppet and faces upward tiltedly arrangement (air inlet end is super Preceding return air end) and puppet bow tiltedly arrangement two kinds of (entering the wind end in advance in return air end), wherein puppet tiltedly arrangement of bowing is particularly conducive to prevent Only coal wall caving.Under normal circumstances, working face puppet bow rake angle be 3 ° -5 °, working face arrangement bracket, coalcutter and scraper plate it is defeated Machine is sent to be all made of the conventional equipment with anti-skid function.Up to now, only has Sichuan Guang Neng group plum a strip of land between hills coal both at home and abroad Mine is reequiped the top beam of conventional hydraulic support, and the working face puppet that repacking after-poppet adapts to bows oblique angle maximum up to 12 °, Chongqing Song Zao group meets spring ore mining so that working face puppet oblique angle of bowing has been reached 17 °, but coal seam with the shaped hydraulic bracket specially designed Thickness only has 1.3m.
But when seam inclination is greater than 55 ° and coal seam thickness is greater than 2.0m, if still using working face tendency arrangement trend The longwall mining method of propulsion, existing lesser pseudo- rake angle just can not effectively solve working face equipment back skating and coal wall caving etc. Safety in production problem.
Summary of the invention
Existing inclination angle is tiltedly arranged greater than the half-edge coal seam of 2.0m using traditional working face is pseudo- greater than 55 °, coal seam thickness When mode is exploited, the back skating of winning apparatus and coal wall caving problem not can effectively solve, in order to solve the technical problem, this Invention provides a kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam and equipment, and the present invention be directed to existing urgency to incline The improvement that the drawbacks of pseudo- tiltedly arrangement of the working face of oblique coal seam longwell fully-mechanized mining and working face equipment carries out.
Technical solution of the invention are as follows:
A kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam, is characterized in that including following step It is rapid:
1) when seam inclination α >=55 °, the determination at critical puppet oblique angle
Space geometry relationship between seam inclination α and puppet oblique angle γ are as follows:
l1Sin β=l1cosγ·sinα (1)
Wherein l1For working face puppet tilt length, β is the true dip angle of pseudo- slanting face of bowing；
Guarantee that the coal that coalcutter is cut off slips certainly, then the true dip angle β of pseudo- slanting face of bowing should meet
β > sin35 °=0.574 sin (2)
The natural repose angle of loose coal is 35 °:
(1) is substituted into (2) to obtain:
cosγ·sin55°>0.574 (3)
It solves: when γ >=45 °, it is thus determined that the size at critical puppet oblique angle is 45 °；
2) arrangement of critical pseudo- inclined cut:
Return aircourse and haulage drift, the advanced haulage drift end in return aircourse end are tunneled respectively along seam inclination direction Then head will hole-through to form puppet and bow slanting face between return aircourse end and haulage drift end, guarantee return aircourse end The distance of advanced haulage drift end is equal with the pseudo- length l in slanting face true dip direction that bows, formed puppet bow slanting face and Bearing direction is in 45 ° of arrangements；
3) it bows slanting face arrangement face timbering device and coal excavation apparatus in puppet, carries out fully-mechanized mining.
Further, the face timbering device includes top beam, pedestal, guided way and push rod, and coalcutter is along guiding Rail walking, the guided way are fixed on the base by push rod, and the pseudo- tilted direction of the base bottom and pseudo- slanting face of bowing is flat Coal channel is slipped in row, the bottom plate free space formation between pedestal and coal wall.
Further, the guided way and puppet slanting face puppet tilted direction of bowing are parallel.
Further, the face timbering device further includes the cantilever directional wheel being arranged on coalcutter, and setting Suspention guided way on top beam, the cantilever directional wheel are adapted with suspention guided way.
Further, the pedestal is in 45 ° of angles close to the side of coal wall and haulage drift.
Further, cantilever directional wheel is telescopic.
Further, step 3) specifically: in exploitation process, coalcutter is along guided way walking coal cutting, while cantilever orients Edge slips coal channel from slipping to transport end to broken coal body of the wheel under suspention guided way walking, coalcutter cutting under the effect of gravity And it transports.
The invention has the benefit that
1) present invention improves at the pseudo- oblique angle of high-dipping pseudo discrete state model to 45 ° by maximum 17 ° at present, is greatly reduced The true dip angle of such working face, can effectively prevent the back skating of working equipment, while pseudo discrete state model can effectively prevent coal wall piece Side.
2) the present invention provides a kind of suspension device for the critical pseudo- oblique angle exploitation of half-edge coal seam, by by top beam with Pedestal is adjusted to irregular parallelogram, realizes the good fit of top beam and coal wall, solves conventional stent pseudo- oblique Sky top area big problem in end face present in recovery process.
3) present invention eliminates middle part chutes, but still realize the gravity haulage of broken coal body, fundamentally solve The problem of pseudo discrete state model pushing and sliding difficulty, while having saved the energy consumption of mining face equipment expense and winning apparatus.
4) method that the present invention is combined using coalcutter walking track with set cap suspention guided way, realizes coal mining Steady safety walking of the machine in working face.
Detailed description of the invention
The critical pseudo- oblique angle exploitation working face arrangement signal of Fig. 1 half-edge coal seam；
Fig. 2 face timbering and Mining Equipment signal；
In figure, 1- coalcutter walking guided way, 2- walking guided way push rod 3- coalcutter suspention guided way 4- coalcutter hangs Hang guide pulley mechanism, 5- coalcutter, 6- pedestal, 7- top beam, 8- hydraulic cylinder, 9- stretches mandril.
Specific embodiment
Embodiment 1: a kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam,
1) critical pseudo- inclination angle working face arrangement
1.1) working face across strike is arranged, across pitch promotes, and the crossover distance of return air end is equal to working face in true dip The projected length in direction, i.e. puppet bow rake angle as 45 ° (being defined as critical pseudo- oblique angle)；
1.2) when seam inclination is greater than 55 °, working face puppet oblique angle design of bowing should meet: guarantee that working face slips coal channel and inclines Angle is greater than the natural repose angle (natural repose angle of granular media coal is 35 °) of loose coal, and the coal body of coal mining crusher machine can slip certainly To transport end, therefore the conveyer of chute in the middle part of working face can be cancelled.It is computed, it is pseudo- oblique when seam inclination is greater than 55 ° As long as angle perseverance, which is greater than 45 °, can guarantee that break up coal bodies edge slips coal channel and slips certainly.
2) in the arrangement suspension device and coalcutter for coal working face
2.1) face timbering device includes top beam, pedestal, guided way and push rod, and coalcutter is walked along guided way, institute It states guided way to be fixed on the base by push rod, base bottom is parallel with the pseudo- pseudo- tilted direction of slanting face of bowing, base bottom shape At slipping coal channel.In order to ensure what the puppet of 55 ° or more half-edge coal seams bowed slanting face slips coal channel inclination angle greater than granular media coal 35 ° of natural repose angle, the critical pseudo- oblique angle size of working face should be set as 45 °, i.e. the crossover distance of return air end is equal to work Projected length of the face in true dip direction.The top beam and pedestal of force piece are abnormity by rectangle improvement, close to coal wall one The bevel edge and haulage drift of side are in 45 ° of angles；In order to keep set cap and pedestal parallel with coal wall, do not generated in end face Big non-support gap, transform set cap and pedestal as abnormal shape by traditional rectangle, i.e. set cap and pedestal is close The bevel edge and haulage drift of coal wall side are in 45 ° of angles；2.2) bracket base passes through push rod and dedicated coalcutter walking track It is connected, walking track is parallel with working face puppet tilted direction；
2.3) in order to guarantee not slide down in coalcutter walking process, set cap is equipped with suspention guided way, is arranged and is adopting Cantilever directional wheel and suspention Slidway lap on coal machine, guarantee the stability of coalcutter.
3) coalcutter by working face upper end chamfer feed, coalcutter along walking the coal cutting of track uplink, single rack successively sequence Formula moves frame, immediate support, and broken coal body is slipped certainly to transport end under the effect of gravity and transported.It is loose due to coal mining crusher machine Coal body may be implemented from slipping, therefore can cancel chute in the middle part of working face, and it is tired fundamentally to solve puppet slanting face pushing and sliding of bowing Difficult problem；Cancelling in the middle part of working face after chute, for the walk problem for solving coalcutter, the dedicated walking rail of coalcutter is set Road is connected by push rod with bracket base, and coalcutter can walk on walking track along the direction parallel with coal wall.
Embodiment 2: as shown in Fig. 1 (a), critical puppet bow oblique angle working face arrangement: tunnel air return lane respectively along bearing The distance of road and haulage drift, the advanced haulage drift end in return aircourse end is equal with the length l in working face true dip direction, Hole-through open-off cut between tailentry road end and haulage drift end, the puppet of formation is bowed slanting face and bearing side To in 45 ° of angles (critical puppet oblique angle).Pseudo- slanting face true dip angle is greater than 35 ° of natural repose angle of broken bastard coal, coal mining machine cut Under broken coal body can be realized along floor undulation from slipping, transported without drag conveyor, therefore drag conveyor can be cancelled, Entire working face section is substantially formed one and slips coal channel.
Embodiment 3: as shown in Fig. 1 (b), puppet bow slanting face true dip angle β and seam inclination α and critical puppet oblique angle γ it Between space geometry relationship are as follows:
l1Sin β=l1cosγ·sinα (1)
When seam inclination α is 55 °, it is ensured that the coal that coalcutter is cut off can slip certainly, then the true of pseudo- slanting face of bowing inclines Angle should be greater than 35 ° (natural repose angles of loose coal), it may be assumed that
β > sin35 °=0.574 sin (2)
(1) is substituted into (2) to obtain:
cosγ·sin55°>0.574 (3)
Solve: when γ=45 ° and α >=55 °, the true dip angle β perseverance of working face is greater than 35 °, it is thus determined that critical pseudo- oblique The size at angle is 45 °.
In exploitation process, coalcutter is along guided way walking coal cutting, while cantilever directional wheel is mined along suspention guided way walking Broken coal body under machine cutting is under the effect of gravity along slipping coal channel from slipping to transport end and transport.
Embodiment 4: as shown in Figure 2 a, face timbering and coal excavation apparatus: bracket is special-shaped hydraulic support, top beam and pedestal Bevel edge and haulage drift close to coal wall side are in 45 ° of angles；Hydraulic support foundation passes through walking guided way push rod 2 and coalcutter Walking guided way 1 is connected, and coalcutter 5, which is ridden, to be seated on coalcutter walking guided way 1, and walk back and forth coal cutting.
Embodiment 5: it is further, as shown in Figure 2 b, since the stability of coalcutter is difficult to through single walking track It is controlled, therefore suspention guided way, then the orientation of the telescopic boom by installing on coalcutter is set in set cap lower part Wheel and suspention guided way overlap joint, guarantee the stability of coalcutter.In order to guarantee the stability of coalcutter in the process of walking without To sliding down, coalcutter suspention leading block 4 is each side set at the coalcutter back side, and adopting on the downside of set cap is set Coal machine suspends guided way overlap joint 3 in midair, plays the walking of coalcutter auxiliary and guiding role.

Claims (7)

1. a kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam, it is characterised in that the following steps are included:
1)
When seam inclination α >=55 °, the determination at critical puppet oblique angle
Space geometry relationship between seam inclination α and puppet oblique angle γ are as follows:
l1Sin β=l1cosγ·sinα (1)
Wherein l1For working face puppet tilt length, β is the true dip angle of pseudo- slanting face of bowing；
Guarantee that the coal that coalcutter is cut off slips certainly, then the true dip angle β of pseudo- slanting face of bowing should meet:
β > sin35 °=0.574 sin (2)
The natural repose angle of loose coal is 35 °:
(1) is substituted into (2) to obtain:
cosγ·sin55°>0.574 (3)
It solves: when γ >=45 °, it is thus determined that the size at critical puppet oblique angle is 45 °；
2) arrangement of critical pseudo- inclined cut:
Return aircourse and haulage drift are tunneled respectively along seam inclination direction, the advanced haulage drift end in return aircourse end, so It will be hole-throughd between return aircourse end and haulage drift end afterwards and to form puppet and bow slanting face, guarantee that return aircourse end is transported in advance The distance of defeated tunnel end is equal with the puppet length l in slanting face true dip direction that bows, and forms puppet slanting face of bowing and walks with coal seam To direction in 45 ° of arrangements；
3) it bows slanting face arrangement face timbering device and coal excavation apparatus in puppet, carries out fully-mechanized mining.
2. the critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam according to claim 1, it is characterised in that: institute Stating face timbering device includes top beam, pedestal, guided way and push rod, and coalcutter is walked along guided way, and the guided way is logical It crosses push rod to be fixed on the base, the base bottom is parallel with the pseudo- pseudo- tilted direction of slanting face of bowing, the bottom between pedestal and coal wall Coal channel is slipped in the formation of plate free space.
3. the critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam according to claim 2, it is characterised in that: institute It is parallel to state guided way and puppet slanting face puppet tilted direction of bowing.
4. the critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam according to claim 3, it is characterised in that: institute Stating face timbering device further includes the cantilever directional wheel being arranged on coalcutter, and the suspention guiding being arranged on top beam Rail, the cantilever directional wheel are adapted with suspention guided way.
5. the critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam according to claim 4, it is characterised in that: institute Pedestal is stated close to the side of coal wall and haulage drift in 45 ° of angles.
6. the critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam according to claim 5, it is characterised in that: outstanding Arm directional wheel is telescopic.
7. -6 critical pseudo- oblique angle comprehensive mechanical mining method of any half-edge coal seam according to claim 1, special Sign is: step 3) specifically:
In exploitation process, coalcutter is along guided way walking coal cutting, while cantilever directional wheel, along suspention guided way walking, coalcutter is cut The broken coal body cut off end and is transported from slipping to transport along slipping coal channel under the effect of gravity.
CN201811345944.7A 2018-11-13 2018-11-13 A kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam Pending CN109184692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811345944.7A CN109184692A (en) 2018-11-13 2018-11-13 A kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811345944.7A CN109184692A (en) 2018-11-13 2018-11-13 A kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam

Publications (1)

Publication Number Publication Date
CN109184692A true CN109184692A (en) 2019-01-11

Family

ID=64939542

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811345944.7A Pending CN109184692A (en) 2018-11-13 2018-11-13 A kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam

Country Status (1)

Country Link
CN (1) CN109184692A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112483091A (en) * 2020-12-30 2021-03-12 中国矿业大学(北京) Mining system and mining method for steeply inclined coal seam mining area pseudo-dip-inclined arrangement
CN112855156A (en) * 2021-01-12 2021-05-28 西安科技大学 Steeply inclined coal seam special-shaped support strike long-wall depression pseudo-inclined working face comprehensive mechanical coal mining equipment and coal mining method using same
CN114483030A (en) * 2022-01-14 2022-05-13 西安科技大学 Planing and transporting equipment for mining steep inclined thin and medium coal seam
CN114483031A (en) * 2022-01-14 2022-05-13 西安科技大学 Mining equipment suitable for mechanized mining of steep-inclined thin and medium-thickness coal seams

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110001348A1 (en) * 2008-02-19 2011-01-06 Rag Aktiengesellschaft Method for Controlling Longwall Operations Using Boundary Layer Recognition
CN102562113A (en) * 2012-03-15 2012-07-11 重庆市能源投资集团科技有限责任公司 Anti-skidding structure of three-machine matched equipment for fully mechanized coal face of steep seam
CN102587913A (en) * 2012-03-15 2012-07-18 重庆市能源投资集团科技有限责任公司 Steeply inclined seam dip oblique strike longwall comprehensive mechanical coal mining method
CN105134215A (en) * 2015-09-25 2015-12-09 西安科技大学 Local filling mining method for longwall face along strike of steeply dipping seam
CN106523012A (en) * 2016-12-08 2017-03-22 四川航天电液控制有限公司 Scraper conveyor pushing structure for pitching oblique mining way of fully-mechanized coal mining face of sharp-inclined coal seam

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110001348A1 (en) * 2008-02-19 2011-01-06 Rag Aktiengesellschaft Method for Controlling Longwall Operations Using Boundary Layer Recognition
CN102562113A (en) * 2012-03-15 2012-07-11 重庆市能源投资集团科技有限责任公司 Anti-skidding structure of three-machine matched equipment for fully mechanized coal face of steep seam
CN102587913A (en) * 2012-03-15 2012-07-18 重庆市能源投资集团科技有限责任公司 Steeply inclined seam dip oblique strike longwall comprehensive mechanical coal mining method
CN105134215A (en) * 2015-09-25 2015-12-09 西安科技大学 Local filling mining method for longwall face along strike of steeply dipping seam
CN106523012A (en) * 2016-12-08 2017-03-22 四川航天电液控制有限公司 Scraper conveyor pushing structure for pitching oblique mining way of fully-mechanized coal mining face of sharp-inclined coal seam

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
冯坤等: "急倾斜煤层俯伪斜综采工作面布置层面角研究", <<矿业工程研究>> *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112483091A (en) * 2020-12-30 2021-03-12 中国矿业大学(北京) Mining system and mining method for steeply inclined coal seam mining area pseudo-dip-inclined arrangement
CN112483091B (en) * 2020-12-30 2022-03-15 中国矿业大学(北京) Mining system and mining method for steeply inclined coal seam mining area pseudo-dip-inclined arrangement
CN112855156A (en) * 2021-01-12 2021-05-28 西安科技大学 Steeply inclined coal seam special-shaped support strike long-wall depression pseudo-inclined working face comprehensive mechanical coal mining equipment and coal mining method using same
CN112855156B (en) * 2021-01-12 2023-08-11 西安科技大学 Mechanized coal mining equipment and method for steeply inclined coal seam
CN114483030A (en) * 2022-01-14 2022-05-13 西安科技大学 Planing and transporting equipment for mining steep inclined thin and medium coal seam
CN114483031A (en) * 2022-01-14 2022-05-13 西安科技大学 Mining equipment suitable for mechanized mining of steep-inclined thin and medium-thickness coal seams

Similar Documents

Publication Publication Date Title
CN109184692A (en) A kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam
CN100567703C (en) Comprehensive coal-mining process by using long wall mining method
CN103742148B (en) The soft coal-mining method covering the descending waste filling of supporting of a kind of half-edge coal seam
CN101307692B (en) Sharply inclined coal seam mining method
CN103775085B (en) High-dipping medium-thickness seam flexible type shield digging one supporting is without pillar working
CN104500069B (en) Continuous coal mining machine top-coal mining process for extremely-thick coal seam bound coal
CN207004567U (en) Tunnel is exploited with the coal mine filling that gob side entry retaining is combined
CN101942999A (en) Coal mining method for high-dipping low seam
CN104405437A (en) Mining method employing solid filling and fully-mechanized coal mining hybrid working face
CN102996131A (en) Solid-filling coal mining method with two pre-excavating tunnels for advancing
CN101368482B (en) Novel technique of slight-pitch ore body overall mining method
CN100580219C (en) Underground no pillar recovery method of coal mine
CN105003268A (en) Steeply inclined coal seam strike advancing false dipping fully-mechanized coal mining
CN102587913A (en) Steeply inclined seam dip oblique strike longwall comprehensive mechanical coal mining method
CN109209382A (en) No coal column is without pick lane Z-type working face extraction method
CN105464678A (en) Rapid roadway tunneling method and system
CN104265291A (en) Comprehensive mechanized coal mining method of steeply inclined and extremely thick coal seam planing conveyor
CN104653182A (en) Coal mining method for coal and gangue separate recovery of coal seam with dirt band
CN103174424B (en) Breast and pillar method under long-wall arrangement
CN205277431U (en) Coal road tunnelling apparatus
CN111119896A (en) Bauxite mining method
CN105401951A (en) Common gangue removal method and system for dual rock roadways of coal mine
CN109268013B (en) Rotary mining process for fully mechanized coal mining face with unequal long and large angles
CN107575228A (en) A kind of coal-mining method for reducing double lane protection pillar sizes and reducing roadway deformation amount
CN207829887U (en) A kind of single steep-inclined thick coal seam coal mining system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20190111