CN108035715A - A kind of unregulated fully mechanized coal mining face just adopts stage isometric tune face method - Google Patents
A kind of unregulated fully mechanized coal mining face just adopts stage isometric tune face method Download PDFInfo
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- CN108035715A CN108035715A CN201711438768.7A CN201711438768A CN108035715A CN 108035715 A CN108035715 A CN 108035715A CN 201711438768 A CN201711438768 A CN 201711438768A CN 108035715 A CN108035715 A CN 108035715A
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- 239000003245 coal Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005065 mining Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 230000008093 supporting effect Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 230000003028 elevating effect Effects 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000003325 tomography Methods 0.000 description 5
- 230000001788 irregular Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- 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
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Stage isometric tune face method just is adopted the invention discloses a kind of unregulated fully mechanized coal mining face, belongs to technical field of coal exploitation.Which solve working face in the prior art and push to adopt initial stage due to frequently subtracting frame with shortening the technical problem that the propulsion progress that drag conveyor length is brought is slow, security risk is big.The method of the present invention includes：Determine just to adopt stage open-off cut length first；Then determine tune face center and adjust face radius of turn；It is then determined that adjust face radius of turn, as the central angle corresponding to adjusting face connection roadway width to determine first segment tune face connection roadway, the angle of first segment tune face connection roadway and open-off cut is calculated by central angle, determine the arranged direction of first segment tune face connection roadway, then continue to arrange the follow-up tune face connection roadway such as second segment in the same way, until adjusting face connection roadway with track crossheading to be connected.The present invention, which can cancel fully-mechanized mining working and push to adopt, constantly to be shortened face length initial stage, frequently subtracts frame and shorten the process such as drag conveyor length, improves production efficiency and security.
Description
Technical field
The present invention relates to technical field of coal exploitation, and in particular to a kind of unregulated fully mechanized coal mining face just adopts stage isometric tune
Face method.
Background technology
Limited by condition of coal seam occurrence, general geological condition of coal mine is more complicated, when coal working face open-off cut is arranged
Often influenced by the larger skew fault of drop.In order to improve resource recovery ratio, it is larger tiltedly that working face open-off cut nearby runs into drop
When handing over tomography, the general less parallel skew fault arrangement of open-off cut, the angle between working face open-off cut and gate road is no longer
It is right angle, open-off cut length is more than the vertical range between two gate road of working face, and working face just adopts the stage, and there are trigonum
Domain, causes shape of working surface irregular.
For above-mentioned irregular face, the fan-shaped Regulate inclination mining of most domestic Coal Exploitation at present, by adjusting work
Face direction of propulsion, be gradually shortened face length, repeatedly subtracts frame during pushing to adopt, repeatedly shortens conveyor lengths to complete just to adopt
Stage tune face work, cause working face push to adopt frequently subtract initial stage frame with shorten drag conveyor length, labor strength compared with
Greatly, promote progress slower, security risk increases.
The content of the invention
For above-mentioned technological deficiency existing in the prior art, the present invention proposes a kind of unregulated fully mechanized coal mining face and just adopts
Stage isometric tune face method, this method can cancel working face push to adopt constantly shorten initial stage face length, frequently subtract frame with contracting
The processes such as short drag conveyor length, improve production efficiency and security.
Its technical solution includes：
A kind of unregulated fully mechanized coal mining face just adopts stage isometric tune face method, and the method comprises the following steps successively：
A, when track crossheading and the haulage gate of the unregulated fully mechanized coal mining face be subject to its angle α more than 40 ° compared with
When the not water guide skew fault of big drop influences, along with the not water guide skew fault extending direction direction that is substantially parallel cloth
Open-off cut is put, and is stayed between the open-off cut and not water guide skew fault and sets protection coal pillar of the width as 5m, the open-off cut
One end connection transportation crossheading and extended from haulage gate to track crossheading direction, the open-off cut is broken using the rectangle of one fixed width
Face；
B, determine tune face center and adjust face radius of turn：With open-off cut and the handpiece of scraper conveyer of haulage gate junction
Hold as tune face center, tune face radius of turn is determined using formula (1)；
The distance ε at the tune face radius of turn=open-off cut length L+ handpiece of scraper conveyer end and haulage gate coal wall side
(1)；
C, the parameter of first segment tune face connection roadway is calculated, the parameter determines with the following method；
C1, foundation Roof Rock Strata of Coal Seam characteristic and Technological Economy factor determine the width x of tune face connection roadway；
C2, in roadway layout plan, using tune face center as the center of circle, using tune face radius of turn as radius,
Draw the inner side with the open-off cut other end on the inside of circle connection track crossheading；
C3, the central angle β corresponding to according to formula (2) solution first segment tune face connection roadway：
Cos β/2=(L+ ε-x+y)/(L+ ε) (2)；
In formula (2)：Y is scraper conveyor tail end with adjusting the minimum range helped outside the connection roadway of face；
L is open-off cut length；
X is the width of tune face connection roadway；
ε is the distance at handpiece of scraper conveyer end and haulage gate coal wall side；
C4, the angle γ for determining according to formula (3) first segment tune face connection roadway and open-off cut
γ=90 °-β/2 (3)；
C5, with the arc section chord length corresponding to the central angle β corresponding to the connection roadway of first segment tune face determine first segment tune face
Connection roadway length Z, as shown in formula (4)：
Z=2 (L+ ε) sin β/2 (4)；
D, first segment tune face connection roadway uses rectangular cross section, according to the angle γ of first segment tune face connection roadway and open-off cut,
Side, outer side in the width x arrangements tunnel of tune face connection roadway, using first segment tune face connection roadway length Z as tunnel development length；
E, step d is met, after arranging first segment tune face connection roadway, next section is calculated with reference to step c and adjusts face connection roadway ginseng
Count and arrange next section of tune face connection roadway, and so on, until final stage tune face connection roadway is connected with track crossheading；
F, arrange just mining face equipment, start the back production of tune face.
As the preferred solution of the present invention, the open-off cut uses " anchor rete cord+steel band " support pattern, adds by centre
Two rows of monomer point column supportings are played, respectively 2 end head brackets of configuration, drag conveyor are arranged in open-off cut and lean on the upper and lower termination of open-off cut
At nearly coal wall, elevating conveyor and ribbon conveyer are disposed with close to work surface side in haulage gate.
As another preferred solution of the present invention, the width x of tune face connection roadway is 5-6m.
Preferably, the scraper conveyor tail end is 1-2m with adjusting the minimum range y helped outside the connection roadway of face.
Preferably, the method moves towards longwell or inclined longwell mining method applied to seam inclination less than 12 °.
Since the tune face central point of selection is at face end in above-mentioned steps b, roof timbering roof supporting repeatedly, top
Plate is difficult in maintenance, it is necessary to strengthen safeguarding；The outer side of tail and connection roadway reserves the distance of 1m in above-mentioned steps e, ensures foot
Enough rack spaces, prevent from squeezing frame, sting frame phenomenon.
Compared with prior art, present invention offers following advantageous effects：
The stage is adopted at the beginning of unregulated fully mechanized coal mining face, using the side of the isometric tune face exploitation arrangement tune face connection roadway of working face
Method, can ensure that working face just adopts the stage with identical face length propulsion, eliminate the initial stage of pushing to adopt frequently subtracts frame and contracting
The processes such as short drag conveyor length, reduce labor intensity, improve work efficiency and security；Therefore irregular fully mechanized mining work
Make face and just adopt stage isometric tune face method, fully-mechanized mining advantage can be given full play to, improve fully mechanized mining to complicated geological bar
The adaptability of part.
The method that a kind of unregulated fully mechanized coal mining face proposed by the present invention just adopts stage isometric tune face, by rationally determining work
Make face open-off cut length, adjust face connection roadway section length and width to realize, ensure that irregular face just adopts stage energy
It is enough to be promoted with identical face length, reduce and frequently subtract frame the initial stage of pushing to adopt with shortening the processes such as drag conveyor length, section
About substantial amounts of manpower, improves work efficiency and techno-economic effect.
Brief description of the drawings
The present invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is that the unregulated fully mechanized coal mining face of the present invention just adopts the open-off cut and connection roadway cloth of stage isometric tune face method
Put figure；
Fig. 2 just adopts the first segment tune face connection roadway institute of stage isometric tune face method for the unregulated fully mechanized coal mining face of the present invention
Corresponding central angle β；
Wherein, 1- tracks crossheading；2- haulage gates；3- open-off cuts；4- first segment tune face connection roadway；5- second segment tune face joins
Network lane；6- Scraper Conveyor in Mining Face；7- handpiece of scraper conveyer end；8- elevating conveyors and ribbon conveyer；9- tomographies.
Embodiment
The present invention propose a kind of unregulated fully mechanized coal mining face just adopt stage isometric tune face method, in order to make the present invention it is excellent
Point, technical solution are clearer, clear and definite, and with reference to specific embodiment, the present invention will be further described.
The present invention just adopts stage isometric tune face method using a kind of unregulated fully mechanized coal mining face, mainly real by following steps
It is existing：
Step 1: when working face track crossheading, by larger drop skew fault, (tomography 9 is pressed from both sides with gate road with haulage gate
Angle α>40 °) when influencing, open-off cut is arranged generally along with the almost parallel direction of skew fault extending direction, and open-off cut with
The protection coal pillar of 5m is left between skew fault (not water conductive fault), open-off cut is arranged from haulage gate to track crossheading direction, is opened
A vertical intervals of the length L between two crossheadings is cut, open-off cut is using the larger rectangular cross section of width；The open-off cut supporting is anchor
Rete cord+steel band supporting, by centre plus plays two rows of monomer point column supportings, respectively 2 end head brackets of configuration, working face are scraped for upper and lower termination
Plate conveyer 6 is arranged in open-off cut at coal wall, and elevating conveyor and ribbon conveyer 8 are arranged in haulage gate close to working face
Side；
Step 2: the drag conveyor head end 7 for choosing open-off cut and haulage gate junction is just to adopt stage tune face center；
Step 3: determining the optimal placement width x of tune face connection roadway, adjust face connection roadway width x bigger, adjust face contact
Tunnel broken line is longer, and broken line hop count is fewer, is more conducive to construct；According to roof condition, general connection roadway width x takes 5
~6m is preferably；
Step 4: in roadway layout plan, using L+ ε as tune face radius of turn, (ε is handpiece of scraper conveyer end and fortune
The distance of defeated crossheading work surface side lane side), justify by center of circle picture of head end, connection track crossheading inner side and open-off cut inner side；
Step 5: the central angle β corresponding to the connection roadway of first segment tune face is determined according to connection roadway width x, according to following
Formula can try to achieve β angles：
Cos β/2=(L+ ε-x+y)/(L+ ε)
In formula, the length of L- working faces；ε-handpiece of scraper conveyer end and the distance of haulage gate work surface side lane side；
The width of x- tune face connection roadway, the width x for adjusting face connection roadway is 5-6m；Y- scraper conveyor tails outside connection roadway with helping
Minimum range, generally take 1-2m, preferably take 1m；
Step 6: the angle γ of first segment tune face connection roadway and open-off cut is determined according to β.γ can be tried to achieve according to following equation
Angle：
γ=90 °-β/2
Step 7: it is by with open-off cut angle γ directions arrangement tune face connection roadway, first segment tune face connection roadway length Z
Arc section chord length corresponding to β angles, Z=2 (L+ ε) sin β/2, string when radius is L corresponding to β angles are arranged in connection roadway
Side, by the outer side (1m is arranged as outer side outside arc vertex) of tune face connection roadway width x arrangements, connection roadway uses rectangle in side outside inside
Section；
Step 8: after the angle beta corresponding first segment tune face connection roadway is arranged, continue to arrange in the same way
Connection roadway 5 grade in second segment tune face subsequently adjusts face connection roadway, until adjusting face connection roadway to be connected with track crossheading；
Step 9: arrangement working face equipment, starts the back production of tune face.
Embodiment 1：
With reference to shown in Fig. 1 and Fig. 2, specific method includes：
The determining of 3 length of unregulated fully mechanized coal mining face open-off cut, central angle β corresponding to first segment tune face connection roadway 4
Determine, adjust determining for face connection roadway section length and width, when deployment rails crossheading 1 and haulage gate 2 are oblique by larger drop
Hand over tomography (tomography and gate road angle α>40 °) influence when, then along the direction almost parallel with skew fault extending direction
Arrange open-off cut, and the protection coal pillar of 5m, open-off cut length are left between the driving of open-off cut and skew fault 9 (not water conductive fault)
Vertical interval L between two crossheadings, determines the optimal placement width x of tune face connection roadway, 5~6m is generally taken, with first
It is handpiece of scraper conveyer end that section, which adjusts central angle half-angle cosine formula cos β/2==(L+ ε-x+y)/(the L+ ε), ε of face connection roadway,
With the distance of crossheading coal wall side, y is the minimum range with side outside tune face connection roadway in scraper conveyor tail rotary course, excellent
1m is chosen, calculates the central angle β corresponding to the connection roadway of first segment tune face, then scraping with open-off cut and haulage gate junction
Plate conveyer head end 7 carries out the exploitation of isometric tune face for tune face center, by with the direction arrangement tune face of open-off cut angle γ=90 °-β/2
Connection roadway, arc section chord lengths of the first segment tune face connection roadway length Z corresponding to β angles, Z=2 (L+ ε) sin β/2, radius
For L when β angles corresponding to string be arranged to help in connection roadway, side outside is by outer side (the arc top of tune face connection roadway width x arrangements inside
The outer 1m of point is arranged as outer side), tunnel uses rectangular shaped roadways, continues the exploitation of tune face, circulates and arranges tune face connection roadway with β angles, directly
It is connected to face connection roadway is adjusted with haulage gate.
In the present embodiment, adjusting face center to be chosen at, geological conditions is relatively good, the region of adjoining rock stability.
In the present embodiment, by first segment tune face connection roadway central angle half-angle cosine formula cos β/2==(L+ ε-x+y)/
(L+ ε), draws optimal tune face angle beta=2arccos (L+ ε-x+1)/(L+ ε).
In the present embodiment, strengthening supporting is needed at the fork of face center adjusting, in addition to conventional supporting, also needs pass point column.
In the present embodiment, face connection roadway is adjusted to use " anchor rete cord+steel band " supporting, anchor cable length is fitted depending on Coal Seam Thickness Change
Work as adjustment, the general depth for requiring to anchor into hard rock is not less than 1.5m, and needs to use nest anchor ropes.
In the present embodiment, for effectively control tune face connection roadway surrouding rock deformation and suspension roof support resistance, side portion's anchor pole, which adds, to be allowed
Press component.
In the present embodiment, when working face tune face, stent and transporter need to be controlled on the basis of head, prevents stent
With conveyor from sliding down phenomenon.
The part do not addressed in the present invention uses or uses for reference prior art and can be achieved.
Although more herein used the terms such as first segment tune face connection roadway, second segment tune face connection roadway,
It does not preclude the possibility of using other terms, the letter that those skilled in the art do these terms under the enlightenment of the present invention
It is single to replace, should all be within protection scope of the present invention.
Claims (5)
1. a kind of unregulated fully mechanized coal mining face just adopt stage isometric tune face method, it is characterised in that the method successively include with
Lower step：
A, when track crossheading and the haulage gate of the unregulated fully mechanized coal mining face be subject to its angle α more than 40 ° it is larger fall
When the not water guide skew fault of difference influences, opened along with not water guide skew fault extending direction direction that is substantially parallel arrangement
Eye is cut, and is stayed between the open-off cut and not water guide skew fault and sets protection coal pillar of the width as 5m, described open-off cut one end
Connection transportation crossheading and from haulage gate to track crossheading direction extend, the open-off cut use one fixed width rectangular cross section；
B, determine tune face center and adjust face radius of turn：Using the handpiece of scraper conveyer end of open-off cut and haulage gate junction as
Tune face center, tune face radius of turn is determined using formula (1)；
The distance ε (1) at the tune face radius of turn=open-off cut length L+ handpiece of scraper conveyer end and haulage gate coal wall side；
C, the parameter of first segment tune face connection roadway is calculated, the parameter determines with the following method；
C1, foundation Roof Rock Strata of Coal Seam characteristic and Technological Economy factor determine the width x of tune face connection roadway；
C2, in roadway layout plan, using tune face center as the center of circle, using tune face radius of turn as radius, draw circle
Connect the inner side with the open-off cut other end on the inside of track crossheading；
C3, the central angle β corresponding to according to formula (2) solution first segment tune face connection roadway：
Cos β/2=(L+ ε-x+y)/(L+ ε) (2)；
In formula (2)：Y is scraper conveyor tail end with adjusting the minimum range helped outside the connection roadway of face；
L is open-off cut length；
X is the width of tune face connection roadway；
ε is the distance at handpiece of scraper conveyer end and haulage gate coal wall side；
C4, the angle γ for determining according to formula (3) first segment tune face connection roadway and open-off cut：
γ=90 °-β/2 (3)；
C5, determine the contact of first segment tune face with the arc section chord length corresponding to the central angle β corresponding to the connection roadway of first segment tune face
Lane length Z, as shown in formula (4)：
Z=2 (L+ ε) sin β/2 (4)；
D, first segment tune face connection roadway uses rectangular cross section, according to the angle γ of first segment tune face connection roadway and open-off cut, adjusts face
Side, outer side in the width x arrangements tunnel of connection roadway, using first segment tune face connection roadway length Z as tunnel development length；
E, step d is met, after arranging first segment tune face connection roadway, next section is calculated with reference to step c and adjusts face connection roadway parameter simultaneously
Arrange next section of tune face connection roadway, and so on, until final stage tune face connection roadway is connected with track crossheading；
F, arrange just mining face equipment, start the back production of tune face.
2. a kind of unregulated fully mechanized coal mining face according to claim 1 just adopts stage isometric tune face method, it is characterised in that：
The open-off cut uses " anchor rete cord+steel band " support pattern, by centre plus beats two rows of monomer point column supportings, open-off cut upper and lower end
Head 2 end head brackets of each configuration, drag conveyor are arranged in open-off cut at coal wall, in haulage gate close to work surface side cloth
It is equipped with elevating conveyor and ribbon conveyer.
3. a kind of unregulated fully mechanized coal mining face according to claim 1 just adopts stage isometric tune face method, it is characterised in that：
The width x of tune face connection roadway is 5-6m.
4. a kind of unregulated fully mechanized coal mining face according to claim 1 just adopts stage isometric tune face method, it is characterised in that：
The scraper conveyor tail end is 1-2m with adjusting the minimum range y helped outside the connection roadway of face.
5. a kind of unregulated fully mechanized coal mining face according to claim 1 just adopts stage isometric tune face method, it is characterised in that：
The method is applied to seam inclination and moves towards longwell or inclined longwell mining method less than 12 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711438768.7A CN108035715B (en) | 2017-12-27 | 2017-12-27 | A kind of unregulated fully mechanized coal mining face just adopts stage isometric tune face method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711438768.7A CN108035715B (en) | 2017-12-27 | 2017-12-27 | A kind of unregulated fully mechanized coal mining face just adopts stage isometric tune face method |
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| CN108035715B CN108035715B (en) | 2019-05-07 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209382A (en) * | 2018-10-23 | 2019-01-15 | 西山煤电(集团)有限责任公司 | No coal column is without pick lane Z-type working face extraction method |
| CN111411963A (en) * | 2020-05-08 | 2020-07-14 | 北京圆之翰工程技术有限公司 | Rotary coal mining method under coal mine |
| CN112012741A (en) * | 2020-09-03 | 2020-12-01 | 神华神东煤炭集团有限责任公司 | Fully mechanized coal mining face inclination adjusting method |
| CN112593937A (en) * | 2020-12-03 | 2021-04-02 | 兖州煤业股份有限公司 | Underground coal mining method |
| CN113464141A (en) * | 2021-08-25 | 2021-10-01 | 国能神东煤炭集团有限责任公司 | Triangular coal area recovery method |
| CN113482616A (en) * | 2021-08-17 | 2021-10-08 | 华能铜川照金煤电有限公司西川煤矿分公司 | Novel fully mechanized coal mining face arrangement method |
| CN113803068A (en) * | 2021-08-30 | 2021-12-17 | 国能神东煤炭集团有限责任公司 | Method for recovering leftover coal |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209382A (en) * | 2018-10-23 | 2019-01-15 | 西山煤电(集团)有限责任公司 | No coal column is without pick lane Z-type working face extraction method |
| CN111411963A (en) * | 2020-05-08 | 2020-07-14 | 北京圆之翰工程技术有限公司 | Rotary coal mining method under coal mine |
| CN112012741A (en) * | 2020-09-03 | 2020-12-01 | 神华神东煤炭集团有限责任公司 | Fully mechanized coal mining face inclination adjusting method |
| CN112593937A (en) * | 2020-12-03 | 2021-04-02 | 兖州煤业股份有限公司 | Underground coal mining method |
| CN113482616A (en) * | 2021-08-17 | 2021-10-08 | 华能铜川照金煤电有限公司西川煤矿分公司 | Novel fully mechanized coal mining face arrangement method |
| CN113482616B (en) * | 2021-08-17 | 2024-02-06 | 华能铜川照金煤电有限公司西川煤矿分公司 | Novel fully-mechanized mining face arrangement method |
| CN113464141A (en) * | 2021-08-25 | 2021-10-01 | 国能神东煤炭集团有限责任公司 | Triangular coal area recovery method |
| CN113803068A (en) * | 2021-08-30 | 2021-12-17 | 国能神东煤炭集团有限责任公司 | Method for recovering leftover coal |
| CN113803068B (en) * | 2021-08-30 | 2024-01-23 | 国能神东煤炭集团有限责任公司 | Corner coal recovery method |
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| CN108035715B (en) | 2019-05-07 |
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