CN103437777A - Coal mining roadway - Google Patents
Coal mining roadway Download PDFInfo
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- CN103437777A CN103437777A CN2013103764135A CN201310376413A CN103437777A CN 103437777 A CN103437777 A CN 103437777A CN 2013103764135 A CN2013103764135 A CN 2013103764135A CN 201310376413 A CN201310376413 A CN 201310376413A CN 103437777 A CN103437777 A CN 103437777A
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Abstract
The invention discloses a coal mining roadway. The coal mining roadway comprises a working surface, a ventilation roadway and a transportation roadway, wherein the ventilation roadway is arranged on a seam floor of a coal seam, and the transportation roadway is arranged between a coal seam roof and the seam floor. The working surface comprises a shelving working surface section, a transition circular-arc working surface section and an inclined working surface section, wherein the working surface is arranged in an inclined mode in the longitudinal direction, the shelving working surface section and the inclined working surface section are smoothly connected together through the transition circular-arc working surface section, the shelving working surface section is arranged on the lower oblique portion of the transition circular-arc working surface section, and is communicated with the transportation roadway, the inclined working surface section is arranged on the seam floor, is arranged on the upper oblique portion of the transition circular-arc working surface section, and is communicated with the ventilation roadway, a shelving included angle alpha is formed between the shelving working surface section and the horizontal plane, an inclined included angle beta is formed between the inclined working surface section and the horizontal plane, and the shelving included angle alpha is smaller than the inclined included angle beta. The coal mining roadway can improve the stress condition of an end support and the stress condition of a crab bearer of a large-dip-angle fully mechanized caving face, has control over downward sliding of the end support and the crab bearer of the large-dip-angle fully mechanized caving face, and is high in coal mining efficiency.
Description
Technical field
The present invention relates to the technology field, relate in particular to a kind of coal cutting roadway that seam inclination is used in the seam mining more than 25 °.
Background technology
In coal mining the comprehensive mechanization coal caving mining method have that drivage ratio is low, efficiency is high, strong adaptability and be easy to realize the significantly advantage such as high yield, obtained development more and more widely in China.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 mining height a 2～3m is arranged in (or segmentation) bottom along coal seam, carry out back production by conventional method, utilize mine pressure or be aided with artificial loosening method, emitted by support rear (or top) after making the crushing voerhead coal of support top become a prose style free from parallelism, 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, also generally adopted the mining coal-mining method for inclination angle at the face in steep thick coal seam more than 25 ° in the last few years, exploitation effect is fine, such as: colliery, the Jingyuan, Gansu coal 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 the work plane safety in production creates conditions.The tunnel of most high inclination-angle fully mechanized coal face (cutting eye) arranges that being commonly its transportation, return airway all arranges along seat earth, work plane (cutting eye) is generally also arranged along seat earth, lower end and work plane directly by large slope to the 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 the pedestrian, transports the not smooth of coal, haul;
2,, because the work plane inclination angle is large, lower end and crab bearer are subject to tendency power along inclined direction larger, and be prone to crowded frame between face end support and crab bearer, sting the phenomenons such as frame, moving difficulty not only, bracket side backplate well damage, and very easily cause down frame;
3, because the 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, easily is caving.
Summary of the invention
Goal of the invention of the present invention 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 solution of the present invention provides 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, there is slanted angle β between described inclined cut section and described horizontal plane, and delay the angle α that inclines and be less than slanted angle β.
Further, described transportation lane is arranged in the zone 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; Lower end, Duan inclined cut, described inclined cut is connected with the transition arc work plane upper end of described transition arc face section, and upper end, Duan inclined cut, described inclined cut and described return airway connect.
Further, slow angle α≤12 ° of inclining.
Further, the below of described transition arc face section has the triangle ground coal.
Further, if the angle of transition arc face section is θ=β-α, arc length is K, radius is R, the vertical curve degree that is positioned at the intermediate channel of the drag conveyor on work plane is a, and the intermediate channel number is b, and the length of intermediate channel is c, the maximum perpendicular drift angle of pin row is d=e～f, the 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 the arc length ratio is: R/K=2.292, intermediate channel number b=θ/a, the long K1=b * c of shortest arc, pin row number g=θ/e, the long K2=g * h of long arc.
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:
To delay smoothly by the transition arc face section 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 " the 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 the 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 the scrapper conveyor running status, solves the 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.Its reduced the work plane inbreak or the bulk bastard coal that tumbles from drag conveyor to the threat of lower emergency exit.It has improved coal mining efficiency.
The accompanying drawing explanation
Fig. 1 is that a kind of coal cutting roadway provided by the invention is arranged in the schematic diagram in coal seam;
The schematic diagram that Fig. 2 is the coal cutting roadway shown in Fig. 1;
The connection diagram that Fig. 3 is return airway, transportation lane and work plane;
Fig. 4 is the schematic diagram that is arranged on the maximum undulation angle of the vertical curve degree of intermediate channel of the drag conveyor in the transition arc face section and pin row.
The Reference numeral table of comparisons:
The 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-;
The 2-coal seam;
The 21-roof;
The 22-seat earth;
23-triangle ground coal;
3-transports lane;
The 4-return airway;
The 5-intermediate channel;
The 6-pin row;
The 7-bearing pin;
8-rack rails seat;
9-dumbbell pin.
The specific embodiment
Further illustrate the specific embodiment of the present invention below in conjunction with accompanying drawing.
A kind of coal cutting roadway provided by the invention is mainly used in the seam mining that seam inclination is more than or equal to 25 °.The fully mechanized coal face related in the present invention 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 from the hydraulic support back again, in order to be used for, coal is transported.Combine to put and be each equipment complex and be placed on common fully-mechanized mining working.The stope that fully-mechanized mining working is colliery downhole equipment comprehensive mechanization equipment.
As Figure 1-3, the invention 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, face section 13 and the inclined cut section 11 of should slow inclining 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 between face section 13 and horizontal plane has the slow angle α that inclines, and 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 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, could arrange after air return system forms and adopt the face coal mining.What in the present invention, relate to is vertically 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 an end of work plane 1 is low, and the other end is high, is referred to as the setting that vertically tilts.
The invention provides a kind of coal cutting roadway, its work plane 1 comprises slow incline face section 13, transition arc face section 12 and inclined cut section 11.Work plane 1 mainly is in tilted layout along seat earth 22 inclinations or puppet.Delaying inclines between face section 13 and horizontal plane has the slow angle α that inclines, and 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 in the vertical is little.The threat of the bulk bastard coal that has been conducive to reduce the 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 transported coal, haul is unimpeded by this transition arc face section 12; And avoided between crab bearer being prone to 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 zone 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), after seeing seat earth 22, cut eye along seat earth 22 construction working face 1() 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, the watering of trickle and depositing dust is often arranged, can make friction factor further reduce, the inclination angle that causes coal seam 2 just likely causes downslide due to the deadweight of conveyer and support in the time of 12 °.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 enlarge 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 the amount of establishing of staying of the triangle ground coal 23 that reduces transition arc face section 12 bottoms.Transition arc face section 12 can not be too little, prevents from suddenly amplifying because of the work plane gradient, occur to squeeze frame, stings the phenomenon such as frame.
Drag conveyor is installed for transporting the coal of exploitation on transition arc face section 12 base plates, there are a plurality of intermediate channel 5 on drag conveyor, the roadway floor of installing due to drag conveyor can not be smooth, but fluctuating is arranged, 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, certain gap must be arranged, 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, fix 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 the 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 the transition arc face section is θ, be the slow corner inclined 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 the intermediate channel number is b, and the length of intermediate channel is c, pin row 6 maximum perpendicular drift angles are d=e～f, the 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 the 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 5 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.At first according to intermediate channel 5 vertical curve degree ± a, calculate intermediate channel number b=θ/a, the long K1=b of shortest arc * c=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 6, for safety, the maximum perpendicular drift angle of pin row 6 gets the small value.Pin row number g=θ/e, the long K2=g of long arc * h=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 selected, 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.
" the 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, the 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, the 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 section 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), the 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 the 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 work plane SGZ960/2 * 700 type the middle pan of scraper conveyor vertical curve degree a=± 3 °, the slow rotational angle theta between face section 13 and inclined cut section 11 of inclining=25 °, 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.
Another maximum perpendicular (fluctuating) the drift angle d=1.0 according to its adaptation pin row of MG450/1020-WD type coal-winning machine～1.5 °, 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 " the 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 the anti-down anti-skid bracket successful, and is conducive to the stable of drag conveyor.
Above-described is only principle of the present invention and preferred embodiment.It should be pointed out that for the person of ordinary skill of the art, on the basis of the principle of the invention, can also make some other modification, also should be considered as protection scope of the present invention.
Claims (7)
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, there is slanted angle β between described inclined cut section and described horizontal plane, 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 zone 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; Lower end, Duan inclined cut, described inclined cut is connected with the transition arc work plane upper end of described transition arc face section, and upper end, Duan inclined cut, described inclined cut and described return airway 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 the triangle ground coal.
6. a kind of coal cutting roadway according to claim 5, it is characterized in that, the angle of establishing the transition arc face section is θ=β-α, and arc length is K, radius is R, the vertical curve degree that is positioned at the intermediate channel of the drag conveyor on work plane is a, and the intermediate channel number is b, and the length of intermediate channel is c, the maximum perpendicular drift angle of pin row is d=e～f, the 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 the arc length ratio is: R/K=2.292,
Intermediate channel number b=θ/a, the long K1=b * c of shortest arc,
Pin row number g=θ/e, the long K2=g * h of long arc.
7. a kind of coal cutting roadway according to claim 6, 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.
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| CN104406782A (en) * | 2014-11-28 | 2015-03-11 | 宁夏天地奔牛实业集团有限公司 | Test device for testing vertical bending moments of middle troughs and dumbbell pin of scraper conveyor |
| CN105156116A (en) * | 2015-08-28 | 2015-12-16 | 贵州盘江精煤股份有限公司 | Coal mine stoping roadway designing and constructing method |
| CN105370282A (en) * | 2015-12-05 | 2016-03-02 | 西安科技大学 | High section trend wall-type fully mechanized caving mining method for large inclined super high seam |
| CN107461208A (en) * | 2017-09-22 | 2017-12-12 | 贵州开磷集团股份有限公司 | A kind of contact pipeline well and construction method on inclined orebody |
| 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 |
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Application publication date: 20131211 |