CN203452798U - Coal mining roadway - Google Patents
Coal mining roadway Download PDFInfo
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- CN203452798U CN203452798U CN201320523959.4U CN201320523959U CN203452798U CN 203452798 U CN203452798 U CN 203452798U CN 201320523959 U CN201320523959 U CN 201320523959U CN 203452798 U CN203452798 U CN 203452798U
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Abstract
The utility model discloses a coal mining roadway. The coal mining roadway comprises a working face, a return airway positioned at the coal bed bottom plate of a coal bed and a conveying roadway positioned between a coal bed top plate and the coal bed bottom plate; the working face comprises a gradually inclined working face section, a transition arc working face section and an inclined working face section; the working face is obliquely arranged in the longitudinal direction; the gradually inclined working face section and the inclined working face section are smoothly connected together by the transition arc working face section; the gradually inclined working face section is positioned obliquely below the transition arc working face section and is communicated with the conveying roadway; the inclined working face section is arranged on the coal bed bottom plate, is positioned obliquely above the transition arc working face section and is communicated with the return airway; a gradually inclined included angle alpha is formed between the gradually inclined working face section and the horizontal plane; an inclined included angle beta is formed between the inclined working face section and the horizontal plane; the gradually inclined included angle alpha is smaller than the inclined included angle beta. The stress condition of a large-inclination fully mechanized working face ended support and a leading support is improved, the sliding of the working face is controlled and the coal mining efficiency is high.
Description
Technical field
The utility model relates to technology field, relates in particular to a kind of coal cutting roadway that seam inclination is used in more than 25 ° seam minings.
Background technology
In coal mining comprehensive mechanization coal caving mining method have that drivage ratio is low, efficiency is high, strong adaptability and be easy to realize high yield etc. significantly advantage ， China obtained development more and more widely.It has become thick coal-layer mining one of effective method the most, is also the important channel that mine is realized high-yield and high-efficiency simultaneously.The essence of comprehensive mechanization coal caving mining method is exactly the long-armed work plane of comprehensive mechanization that a mining height 2～3m is arranged in (or segmentation) bottom along coal seam, by conventional method, carry out back production, utilize mine pressure or be aided with artificial loosening method, after making the crushing voerhead coal of support top become a prose style free from parallelism, by support rear (or top), emitted, and transport work plane via drag conveyor.
Most of mining area application mining coal-mining methods, it is all the work plane of arranging in gently inclined thick coal seam, for inclination angle, at more than 25 ° face in steep thick coal seams, also generally adopted mining coal-mining method in the last few years, exploitation effect is fine, such as: colliery, the Jingyuan, Gansu Mei electricity Wang Jia of limited company mountain, the Bao Dian of Yanzhou Coal Industry Co., Ltd. colliery, colliery, the Yang Chang of coal industry company gulf, Shenhua Ningxia etc.High inclination-angle comprehensive mechanized caving coal working face tunnel is arranged should simplify process for stoping, for improving production capacity, guarantees that work plane safety in production creates conditions.The tunnel layout of most high inclination-angle fully mechanized coal face (cutting eye) is commonly its transportation, return airway is all arranged along seat earth, work plane (cutting eye) is generally also arranged along seat earth, lower end and work plane directly by large slope to horizontal plane transition, the following problem that this arrangement exists:
1, the face end support of work plane lower end forms larger back timber step with basic support (or transition bracket), causes pedestrian, transports the not smooth of coal, haul;
2,, because work plane inclination angle is large, lower end and crab bearer are subject to tendency power along inclined direction larger, and between face end support and crab bearer, be prone to crowded frame, sting the phenomenons such as frame, moving difficulty not only, bracket side backplate well damage, and very easily cause down frame;
3, because work plane inclination angle is large, scratch board conveyor easily glides, under alter, to the anti-down, anti-skidding of whole working face equipment, be very disadvantageous;
4, work plane inbreak or the bulk bastard coal that tumbles from drag conveyor are easy to arrive lower outlet, and potential safety hazard is large;
5, Delta Region, lower end top stress is concentrated, and difficult supporting, is easily caving.
Utility model content
Utility model object of the present utility model is to overcome defect of the prior art, and a kind of force-bearing situation that can improve high inclination-angle Face-end Support Full-mechanized Caving Mining Face and crab bearer is provided, and controls the coal cutting roadway that force piece glides, coal mining efficiency is high.
Technical solutions of the utility model provide a kind of coal cutting roadway, comprise work plane, return airway on the seat earth in coal seam and in the roof in described coal seam and the transportation lane between described seat earth, described work plane comprises the slow face section that inclines, transition arc face section and inclined cut section, wherein said work plane is obliquely installed in the vertical, described slow incline face section and described inclined cut section link together smoothly by described transition arc face section, the described slow face section that inclines is positioned at the oblique below of described transition arc face section, and connect with described transportation lane, described inclined cut section is arranged on described seat earth, and described inclined cut section is positioned at the oblique upper of described transition arc face section, and connects with described return airway, described slow incline between face section and horizontal plane, there is the slow angle α that inclines, between described inclined cut section and described horizontal plane, there is slanted angle β, and delay the angle α that inclines and be less than slanted angle β.
Further, described transportation lane is arranged in the region near described roof.
Further, the transition arc work plane upper end of described transition arc face section is in abutting connection with described seat earth, its transition arc work plane lower end is between described seat earth and described roof, and the described slow face section that inclines is arranged between described seat earth and described roof obliquely; The slow work plane lower end of inclining of the described slow face section that inclines connects with described transportation lane, and the described slow work plane upper end of inclining of delaying the face section that inclines is connected with the transition arc work plane lower end of described transition arc face section; The lower end, inclined cut of described inclined cut section is connected with the transition arc work plane upper end of described transition arc face section, and upper end, inclined cut and the described return airway of described inclined cut section connect.
Further, slow angle α≤12 ° of inclining.
Further, the below of described transition arc face section has triangle ground coal.
Further, described slanted angle β is 35 °, and the described slow angle α that inclines is 10 °, and the length of the described slow face section that inclines is 14.8m, and the length of described inclined cut section is 285m, and the arc length K of described transition arc face section is between 12m-19m.
Adopt technique scheme, there is following beneficial effect:
By transition arc face section, will delay smoothly incline face section and inclined cut section and link together, and can effectively prevent that the support on work plane from gliding.And the layout of " slow face section-transition arc face section-inclined cut section of inclining ", end support and crab bearer force-bearing situation have been improved, be conducive to stability of cavern roof herein, guarantee crab bearer supporting intensity, for work plane middle part and tail section support provide cornering force, play one support in an opposite direction, guide effect, prevent that whole working surface hydraulic support from gliding.It also contributes to improve scrapper conveyor running status, solves work plane scratch board conveyor and overlaps irrational problem with transportation lane elevating conveyor, prevents that Scraper Conveyor in Mining Face from gliding.Its lower end supporting that has reduced work plane forms larger back timber step with basic support (or transition bracket), is convenient to work plane pedestrian, fortune coal, haul, is convenient to the maintenance of work plane and transportation lane intersection.It has reduced work plane inbreak or the threat to lower emergency exit of the bulk bastard coal that tumbles from drag conveyor.It has improved coal mining efficiency.
Accompanying drawing explanation
Fig. 1 is arranged in the schematic diagram in coal seam for a kind of coal cutting roadway that the utility model provides;
Fig. 2 is the schematic diagram of the coal cutting roadway shown in Fig. 1;
Fig. 3 is the connection diagram of return airway, transportation lane and work plane;
Fig. 4 is arranged on the vertical curve degree of intermediate channel of the drag conveyor in transition arc face section and the schematic diagram of the maximum undulation angle of pin row.
The Reference numeral table of comparisons:
1-work plane;
11-inclined cut section;
12-transition arc face section;
The slow face section that inclines of 13-;
Upper end, 111-inclined cut;
Lower end, 112-inclined cut;
121-transition arc work plane upper end;
122-transition arc work plane lower end;
The slow work plane upper end of inclining of 131-;
The slow work plane lower end of inclining of 132-;
2-coal seam;
21-roof;
22-seat earth;
23-triangle ground coal;
3-transports lane;
4-return airway;
5-intermediate channel;
6-pin row;
7-bearing pin;
8-rack rails seat;
9-dumbbell pin.
The specific embodiment
Below in conjunction with accompanying drawing, further illustrate the specific embodiment of the present utility model.
A kind of coal cutting roadway that the utility model provides is mainly used in the seam mining that seam inclination is more than or equal to 25 °.The fully mechanized coal face relating in the utility model is comprehensive mechanization caving coal mining work plane, on the basis of the common fully-mechanized mining working of enough high seams, sets up a high-power drag conveyor again after hydraulic support, to be used for, coal is transported.Combine to put and be each equipment complex and be placed on common fully-mechanized mining working.Fully-mechanized mining working is the stope of colliery downhole equipment comprehensive mechanization equipment.
As Figure 1-3, the utility model provides a kind of coal cutting roadway, comprise work plane 1, return airway 4 on the seat earth 22 in coal seam 2 and in the roof 21 in coal seam 2 and the transportation lane 3 between seat earth 22, above-mentioned work plane 1 comprises the slow face section 13 that inclines, transition arc face section 12 and inclined cut section 11, wherein work plane 1 is obliquely installed in the vertical, this is slow, and incline face section 13 and inclined cut section 11 links together smoothly by transition arc face section 12, the slow face section 13 that inclines is positioned at the oblique below of transition arc face section 12, and connect with described transportation lane 3, inclined cut section 11 is arranged on seat earth 22, and inclined cut section 11 is positioned at the oblique upper of transition arc face section 12, and connects with return airway 4, delaying inclines has the slow angle α that inclines between face section 13 and horizontal plane, have slanted angle β, and the slow angle α that inclines is less than slanted angle β between inclined cut section 11 and described horizontal plane.
Above-mentioned return airway 4 by mine return air distinguished and admirable the tunnel of process.Above-mentioned transportation lane 3 is the tunnel of the coal of transportation exploitation.Above-mentioned work plane 1 is also referred to as " cut eye ", be between transportation lane 3 and return airway 4 along 2 tunnels of driving, coal seam, make it form a set of independently air return system, after air return system forms, could arrange and adopt face coal mining.What in the utility model, relate to is longitudinally the direction perpendicular with horizontal plane, and as shown in Figure 1, work plane 1 is obliquely installed in the vertical, is in vertical direction, and one end of work plane 1 is low, and the other end is high, is referred to as the setting that longitudinally tilts.
The utility model provides a kind of coal cutting roadway, and its work plane 1 comprises slow incline face section 13, transition arc face section 12 and inclined cut section 11.Work plane 1 is mainly in tilted layout along seat earth 22 inclinations or puppet.Delaying inclines has the slow angle α that inclines between face section 13 and horizontal plane, between inclined cut section 11 and described horizontal plane, has slanted angle β, and the slow angle α that inclines is less than slanted angle β.Above-mentioned " delay and incline " refers to that the slow angle α that inclines of the slow face section 13 that inclines is less than the slanted angle β of inclined cut section 11, and its degree that inclined degree tilts in the vertical than inclined cut section 11 is in the vertical little.The threat of the bulk bastard coal that has been conducive to reduce work plane inbreak or has tumbled from drag conveyor to lower emergency exit.
Above-mentioned slow incline face section 13 and inclined cut section 11 link together smoothly by transition arc face section 12, the pedestrian who works on this work plane 1 or transport coal, haul is unimpeded by this transition arc face section 12; And avoided being prone between crab bearer crowded frame, stung the phenomenons such as frame; Due to reducing of work plane inclination angle, be conducive to anti-skidding.
As shown in Figure 1, above-mentioned transportation lane 3 is arranged in the region near roof 21.Return airway 3 constructions are arranged along seat earth 22, construct and arrange along roof 21 or Approaching Coal Seam top board 21 horizontal linears in transportation lane 3 in coal seam, work plane 1(cuts eye) bottom is from lower end transportation lane 3 up, behind the inclined gallery, gentle slope of construction certain distance (the slow face section 13 that inclines), construction arc transition section (transition arc face section 12), see after seat earth 22, along seat earth 22 construction working face 1(, cut eye) remaining part (inclined cut section 11), and connect with return airway 4.
As Figure 1-3, the transition arc work plane upper end 121 of above-mentioned transition arc face section 12 is in abutting connection with seat earth 22, its transition arc work plane lower end 122 is between seat earth 22 and roof 21, and the slow face section 13 that inclines is arranged between seat earth 22 and roof 21 obliquely; The slow work plane lower end 132 of inclining of the slow face section 13 that inclines connects with transportation lane 3, and the slow work plane upper end 131 of inclining of the slow face section 13 that inclines is connected with the transition arc work plane lower end 122 of transition arc face section 12; The lower end, inclined cut 112 of inclined cut section 11 is connected with the transition arc work plane upper end 121 of transition arc face section 12, and upper end, inclined cut 111 and the return airway 4 of inclined cut section 11 connect.
Above-mentioned slow angle α≤12 ° of inclining.The below of above-mentioned transition arc face section 12 has triangle ground coal 23.
Determining of the slow face section 13 that inclines: the friction factor of 22 pairs of metals of seat earth is generally 0.35～0.40, and corresponding angle of friction is 18 °～20 °.By work plane, often have trickle and depositing dust to sprinkle water, can make friction factor further reduce, the inclination angle that causes coal seam 2 in the time of 12 ° just likely because the deadweight of conveyer and support causes downslide.Inclination angle is optimum conditions that machine is adopted in the coal seam 2 below 12 °, and equipment can not glide because of deadweight.Therefore determine slow angle α≤12 ° of inclining of the slow face section 13 that inclines, certainly also can suitably expand according to the situations such as frictional force of support and seat earth 22 gradient of gentle slope section.
Determining of transition arc face section 12: transition arc face section 12 is the transition stages that connect slow incline face section 13 and inclined cut section 11, play the abrupt slope of alleviating between high inclination-angle and gentle slope, connection, transitional function, its length can not be too large, with reduce transition arc face section 12 bottoms triangle ground coal 23 stay the amount of establishing.Transition arc face section 12 can not be too little, prevents from suddenly amplifying because of the work plane gradient, occurs squeezing frame, stinging the phenomenons such as frame.
Drag conveyor is installed for transporting the coal of exploitation on transition arc face section 12 base plates, on drag conveyor, there are a plurality of intermediate channel 5, the roadway floor of installing due to drag conveyor can not be smooth, but there is fluctuating, so drag conveyor has relief volume, and the middle pan of scraper conveyor 5 is one to save connecting, and be fixed together by dumbbell pin 9, because the diameter of the aperture ratio dumbbell pin 9 of solid dumbbell pin is large, between intermediate channel 5 and intermediate channel 5, must there is certain gap, so drag conveyor has certain (vertically) flexible, this flexible shows as the angle between intermediate channel and intermediate channel, also be referred to as the vertical curve degree a of intermediate channel 5.
The side of drag conveyor, fixes the rack rails seat 8 of the U-shaped section of a row with bolt.The ears or side handles of a utensil at pin row 6 two ends insert rack rails seat 8, and fix with bearing pin 7.Because drag conveyor has certain (vertically) flexible, thus when intermediate channel 5(vertical) during deflection certain angle, pin row must vertical (fluctuating) direction on also deflection certain angle, this angle is vertical (fluctuating) the drift angle d of pin row 6.
The calculating of transition arc face section 12 arc length: the angle of establishing transition arc face section is θ, be the slow corner inclining between face section 13 and inclined cut section 11, θ=β-α, arc length is K, radius is R, the vertical curve degree that is positioned at the intermediate channel 5 of the drag conveyor on work plane is a, and intermediate channel number is b, and the length of intermediate channel is c, the maximum perpendicular drift angle of pin row 6 is d=e～f, pin row number is g, and pin row is long is h
, K=π R θ/180,
The radius of transition arc face section with arc length ratio is: R/K=2.292,
In order to guarantee the stable of crab bearer, reduce the amount of establishing of staying of work plane 1 end triangle ground coal 23, arc length K is difficult for too large.According to Scraper Conveyor in Mining Face intermediate channel vertical curve degree ± a, slow rotational angle theta of inclining between face section 13 and inclined cut section 11, derive transition arc face section 12 shortest arcs long.First according to intermediate channel vertical curve degree ± a, calculate intermediate channel number b=θ/a, the long K1=b * c=of shortest arc θ * c/a.
Separately according to coal-winning machine in work plane 1, adapt to maximum perpendicular (fluctuating) drift angle d=e～f of pin row, for safety, the maximum perpendicular drift angle of pin row gets the small value.Pin row number g=θ/e, the long K2=g * h=of long arc θ * h/e.
Therefore arc length K should be: K1≤K≤K2, arc length is a scope, selects K=[K1, K2] arbitrary value be all rational.According to the arc length K selecting, can calculate the radius R=2.292K of arc section.
Preferably, above-mentioned slanted angle β is 35 °, and the slow angle α that inclines is 10 °, and the length of the slow face section 13 that inclines is 14.8m, and the length of inclined cut section 11 is 285m, and the arc length K of transition arc face section 12 is between 12m-19m.
" slow face section-transition arc face section-inclined cut section of inclining " arrangement can successfully be exploited the high inclination-angle stage of work plane 1.
For example, work plane move towards 1768m, tendency 308m.The ocurrence of coal seam of 0～1500m is stable, bearing N35 ° E, and seam inclination is that between 13 °-35 °, mean obliquity is 24 °.The coal seam at 1500～1768m place changes, and inclination angle increases to 32 °-38 °, coal seam average thickness 8.5m, and containing 5～7 layers of cash, complex structure, coal body Polodyakonov coefficient is f=1.5.This work plane adopts Coal Mining Equipment Complement, and its corollary equipment is as follows:
1, coal-winning machine-model: MG450/1020-WD; Characteristic: without chain electric traction rack rails pin row formula; Place to use: work plane.
2, drag conveyor-model: SGZ960/2 * 700; Characteristic: double center chain, double speed; Place to use: work plane is portion before and after.
From lower end up, the slow angle α that inclines that chooses the slow face section 13 that inclines is 10 ° to work plane 1, and length is that 14.8m(has 10 crab bearers), work plane crab bearer glides hardly.
Choose inclined cut section 11 for 285m, along seat earth 22 drivings.
Determine the arc length K of transition arc face section 12: corner, °-10 °=25 °, θ=β-α=35, K=π R θ/180, the radius of transition arc face section with arc length ratio is: R/K=2.292.
In order to guarantee the stable of crab bearer, reduce the amount of establishing of staying of buttock triangle ground coal 23, arc length K is difficult for too large.According to type the middle pan of scraper conveyor vertical curve degree a=± 3, work plane SGZ960/2 * 700 °, slow rotational angle theta=25 ° of inclining between face section 13 and inclined cut section 11, release the length of short transition time section, intermediate channel number b=θ/a ≈ 8, K1=b * c=8 * 1.5m(1.5m is every joint intermediate channel length)=12m, this is arc transition segment length lower limit.
Separately according to MG450/1020-WD type coal-winning machine, it adapts to maximum perpendicular (fluctuating) d=1.0～1.5 °, drift angle of pin row, so pin row number g=θ/d=25(for safety, the maximum perpendicular drift angle of pin row gets the small value), the length that K2=g * h=25 * 0.75m ≈ 19m(0.75m is every pin row), 19m is arc transition segment length higher limit.
The arc length K of the transition arc face section 12 of high inclination-angle fully mechanized coal face 1 gets 19m, radius R=2.292K=45m.By this " slow face section-transition arc face section-inclined cut section of inclining " arrangement, the support of work plane does not glide, and chooses arc length when 12～19m simultaneously, for anti-down anti-skid bracket successful, and is conducive to the stable of drag conveyor.
Above-described is only principle of the present utility model and preferred embodiment.It should be pointed out that for the person of ordinary skill of the art, on the basis of the utility model principle, can also make some other modification, also should be considered as protection domain of the present utility model.
Claims (6)
1. a coal cutting roadway, comprise work plane, the return airway on the seat earth in coal seam and in the roof in described coal seam and the transportation lane between described seat earth, it is characterized in that, described work plane comprises slow incline face section, transition arc face section and inclined cut section
Wherein said work plane is obliquely installed in the vertical,
Described slow incline face section and described inclined cut section link together smoothly by described transition arc face section, and the described slow face section that inclines is positioned at the oblique below of described transition arc face section, and connects with described transportation lane;
Described inclined cut section is arranged on described seat earth, and described inclined cut section is positioned at the oblique upper of described transition arc face section, and connects with described return airway;
Described slow incline between face section and horizontal plane, there is the slow angle α that inclines, between described inclined cut section and described horizontal plane, there is slanted angle β, and delay the angle α that inclines and be less than slanted angle β.
2. a kind of coal cutting roadway according to claim 1, is characterized in that, described transportation lane is arranged in the region near described roof.
3. a kind of coal cutting roadway according to claim 2, it is characterized in that, the transition arc work plane upper end of described transition arc face section is in abutting connection with described seat earth, its transition arc work plane lower end is between described seat earth and described roof, and the described slow face section that inclines is arranged between described seat earth and described roof obliquely;
The slow work plane lower end of inclining of the described slow face section that inclines connects with described transportation lane, and the described slow work plane upper end of inclining of delaying the face section that inclines is connected with the transition arc work plane lower end of described transition arc face section; The lower end, inclined cut of described inclined cut section is connected with the transition arc work plane upper end of described transition arc face section, and upper end, inclined cut and the described return airway of described inclined cut section connect.
4. a kind of coal cutting roadway according to claim 3, is characterized in that, slow angle α≤12 ° of inclining.
5. a kind of coal cutting roadway according to claim 4, is characterized in that, the below of described transition arc face section has triangle ground coal.
6. a kind of coal cutting roadway according to claim 5, it is characterized in that, described slanted angle β is 35 °, the described slow angle α that inclines is 10 °, the length of the described slow face section that inclines is 14.8m, the length of described inclined cut section is 285m, and the arc length K of described transition arc face section is between 12m-19m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320523959.4U CN203452798U (en) | 2013-08-26 | 2013-08-26 | Coal mining roadway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320523959.4U CN203452798U (en) | 2013-08-26 | 2013-08-26 | Coal mining roadway |
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| CN203452798U true CN203452798U (en) | 2014-02-26 |
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| CN201320523959.4U Expired - Lifetime CN203452798U (en) | 2013-08-26 | 2013-08-26 | Coal mining roadway |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437777A (en) * | 2013-08-26 | 2013-12-11 | 神华集团有限责任公司 | Coal mining roadway |
| CN106761753A (en) * | 2017-03-15 | 2017-05-31 | 河南理工大学 | A kind of thick seam slicing system lower leaf face layout of actual mining roadway method |
| CN110924947A (en) * | 2019-12-31 | 2020-03-27 | 安徽省矿业机电装备有限责任公司 | Arrangement method of large-inclination-angle equipment |
| CN115012943A (en) * | 2022-07-25 | 2022-09-06 | 沙湾市宝英煤炭有限责任公司 | Coal mining deepening method |
-
2013
- 2013-08-26 CN CN201320523959.4U patent/CN203452798U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437777A (en) * | 2013-08-26 | 2013-12-11 | 神华集团有限责任公司 | Coal mining roadway |
| CN106761753A (en) * | 2017-03-15 | 2017-05-31 | 河南理工大学 | A kind of thick seam slicing system lower leaf face layout of actual mining roadway method |
| CN106761753B (en) * | 2017-03-15 | 2018-08-14 | 河南理工大学 | A kind of thick seam slicing system lower leaf face layout of actual mining roadway method |
| CN110924947A (en) * | 2019-12-31 | 2020-03-27 | 安徽省矿业机电装备有限责任公司 | Arrangement method of large-inclination-angle equipment |
| CN115012943A (en) * | 2022-07-25 | 2022-09-06 | 沙湾市宝英煤炭有限责任公司 | Coal mining deepening method |
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