CN105134212B - A kind of method that three soft high seam tunnel ensures the rate of extraction along top driving longwall top coal caving - Google Patents
A kind of method that three soft high seam tunnel ensures the rate of extraction along top driving longwall top coal caving Download PDFInfo
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- CN105134212B CN105134212B CN201510485050.8A CN201510485050A CN105134212B CN 105134212 B CN105134212 B CN 105134212B CN 201510485050 A CN201510485050 A CN 201510485050A CN 105134212 B CN105134212 B CN 105134212B
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Abstract
Ensure the method for the rate of extraction along top driving longwall top coal caving the present invention relates to three soft high seam tunnels, effectively solve the problems, such as that three soft high seam tunnels ensure the rate of extraction along top driving longwall top coal caving, method is that drift section uses rectangular cross section, tunneled along roof, anchor rete cord active support；After along back driving to section boundary, bottom is dug downwards, makes tunnel along seat earth；Two roadway linkings are formed into open-off cut along bottom plate driving；Lay caving roof coal hydraulic support, conveyer, the coalcutter of working face, two frame high working face end hydraulic supports are respectively arranged in the end point that working face is connected with both sides tunnel, bottom driving is dug in two tunnels in advance all the time, the coal of driving is transported to working face conveyor by elevating conveyor, ensure that the bottom plate of tunnel and working face is located at approximately the same plane, do not stay Triangle Coal, the method of the present invention is simple, easy to operate, cost is low, effect is good, can effectively ensure that the rate of extraction of the three soft high seam tunnels along top driving longwall top coal caving, improves coal production yield.
Description
Technical field
The present invention relates to coal mining technology, particularly three soft high seam tunnel of one kind to ensure back along top driving longwall top coal caving
The method for adopting rate.
Background technology
For all smaller three-soft seam of Seam Roof And Floor and coal strength, refer to the thick coal of coal seam thickness 6.0m or so
Layer, mainly once adopts full thickness using separate zone production, high working face, and Sub-Level Caving once adopts complete thick three kinds of methods.Tunnel during separate zone production
Repeat to arrange, efficiency is low, and large-mining-height working surface once adopts complete thick the problem of easily producing working face wall wall caving, and Sub-Level Caving is opened
It is a kind of comparatively safe efficient method to adopt.
It along one mining height of backplane of high seam is 2~3m that the coal-mining method that high seam longwall top coal caving once adopts full thickness, which is,
Coal working face, arrange caving roof coal hydraulic support, respectively arrange a set of drag conveyor before and after stent, scrapper conveyor conveying above
The coal that coalcutter is cut off, the coal that the scrapper conveyor conveying top plate behind stent is released by coal discharge outlet.
A tunnel and working face are respectively arranged in coal stope and roadways layout, coal seam stope both sides
Connection forms ventilation, transportation system and extra exit.The current popularity anchor pole of roadway support, anchor cable active support mode.Work
Making the tunnel of face both sides can arrange along roof, can also be arranged along seat earth.If arranged along seat earth, work
Face and tunnel connecting portion are more straight, and working face coal recovery rate is higher, but for three-soft seam under the conditions of, tunnel top
Plate is the small cherry coal of intensity, big using the difficulty of bolting and rope support, and roof collapse disaster easily occurs.If tunnel is pushed up along coal seam
Plate arranges that top plate is rock stratum, can play the role of controlroof using bolt and cable anchor supporting, but since working face is along bottom plate
Arrangement, so working face and tunnel connecting portion need gradually to raise, forms " ship " shape, working face and tunnel connecting portion during back production
A large amount of Triangle Coals are easily left in position, influence the rate of extraction of working face coal.
Analyzed for more than, the three-soft seam pair with coal seam thickness 6.0m or so, using mining coal-mining method, general
The tunnel of working face both sides arranges along roof, is a kind of safe and efficient coal winning technology using bolt-mesh-anchor support, while work
Make how that the Triangle Coal below working face and tunnel connecting portion is mined during the back production of face, make working face by " ship " deformation
It is in line, ensures that working face coal recovery rate is the technical issues that need to address.
The content of the invention
For the above situation, to overcome the defect of the prior art, the purpose of the present invention is just to provide a kind of three soft high seams
The method that tunnel ensures the rate of extraction along top driving longwall top coal caving, can effectively solve three soft high seam tunnels along top driving longwall top coal caving
The problem of ensureing the rate of extraction.
The technical solution that the present invention solves is to comprise the following steps：
（1）, set coal working face both sides tunnel：Drift section uses rectangular cross section, the wide 4.0m in tunnel, and tunnel is along coal seam
Top plate tunnels, and head-room 3.0m, tunnel uses anchor rete cord active support；
（2）, working face form：Tunneled along three soft high seam tunnels along top plate to after section boundary, by the lane of length 20.0m
Road digs downwards bottom 3m, makes tunnel along seat earth, this section road height 6.0m；
（3）And then two roadway linkings are formed into open-off cut, height 3.0m along bottom plate driving；
（4）, lay working face caving roof coal hydraulic support, conveyer, coalcutter, the end that working face is connected with both sides tunnel
Two frame high working face end hydraulic supports of each arrangement at head, high working face end hydraulic support both sides are equipped with the face guard of 3.0m, prevent
Both sides coal enters in high working face end hydraulic support；
（5）, working face extraction：In exploitation process, bottom driving is dug in two tunnels in advance all the time, and the coal of driving is by elevating conveyor
It is transported to the drag conveyor of working face or the belt conveyor in tunnel, it is ensured that the bottom plate of tunnel and working face is positioned at same flat
Face, does not stay Triangle Coal, so as to ensure the rate of extraction of working face coal.
The method of the present invention is simple, and easy to operate, cost is low, and effect is good, can effectively ensure that three soft high seam tunnel Yan Ding
The rate of extraction of longwall top coal caving is tunneled, improves coal production yield, economic and social benefit is notable.
Brief description of the drawings
Fig. 1 tunnels longwall top coal caving floor map for three soft high seam tunnel of the present invention along top.
Fig. 2 be in Fig. 1 of the present invention A-A to diagrammatic cross-section.
Fig. 3 is B-B direction diagrammatic cross-section in Fig. 1 of the present invention.
Fig. 4 be in Fig. 1 of the present invention C-C to diagrammatic cross-section.
Embodiment
Elaborate below in conjunction with attached drawing and concrete condition to the embodiment of the present invention.
As shown in Fig. 1-4, the present invention in specific implementation, is realized by following steps：
（1）, coal working face tunnel is set：Rectangular cross section tunnel is excavated, the wide 4.0m in tunnel, tunnel is dug along roof
Into head-room 3.0m, coal working face 1 is below goaf 4, and coal working face tunnel is provided with and mines in coal seam 3
The advanced digging bottom section 2 that working face is connected（As shown in Figure 1）, bolt-mesh-anchor support then is used to tunnel, method is, in coal seam 3
Coal working face both sides keep on file along the direct driving of top 9 tunnels 15 of coal, 15 both sides of tunnel for coal of keeping on file are provided with for supporting
The anchor pole 7 in tunnel, mounting of roof plate have anchor cable 8, and anchor cable 8 is anchored on old top 10 through directly top 9（As shown in Figure 4）, coal-getter
Make have broken coal 12 at the top of the caving roof coal hydraulic support in face 1（As shown in Figure 2）, the tunnel that is connected with coal working face 1
Need lower digging in advance to be formed and excavate section 2 in advance, the tunnel both ends connected with coal working face 1 are equipped with high working face end hydraulic branch
Frame, high working face end hydraulic support structure include the face guard 13 of column 14 and high working face end hydraulic support（As shown in Figure 3）
Form face end supporting；
（2）, advanced dig bottom section：Three soft high seam tunnels are tunneled to after 3 border of coal seam along top plate, along tunnel length 20m's
Section digs downwards the advanced of 3m long and digs bottom section 2, tunnel is arranged along seat earth 11, the height 6m of this section；
（3）, along bottom plate driving two roadway linkings are formed into open-off cuts, method is, when being excavated along seat earth 11, will surpass
Preceding two roadway linkings for digging bottom section 2 and being formed, into open-off cut, height 3m；
（4）, lay the caving roof coal hydraulic support 6 and high working face end hydraulic support 5 of coal working face, and in coal work
Conveyer, coalcutter are placed in face, and two ends are each to arrange two frame high working face end hydraulic supports 5, high working face end due to highly excessive
Head hydraulic support 5 includes column 13, and the face guard of high working face end hydraulic support both sides 3.0m（As shown in Figure 3）, prevent
Both sides coal enters in high working face end hydraulic support；
（5）Coal working face back production：In exploitation process, tunnel both sides are dug bottom section 2 and are tunneled in advance all the time, and mine,
The coal of driving is transported to the drag conveyor of coal working face or the belt conveyor in tunnel by elevating conveyor, it is ensured that tunnel and is adopted
The bottom plate of coal working face is located at approximately the same plane, and the Triangle Coal two side bottom of coal working face is mined, to ensure to mine
The rate of extraction of working face coal.
The method of the present invention is simple, and easy to operate, cost is low, and effect is good, and through site test and application, it was demonstrated that use peace
Entirely, reliable and stable, production efficiency is high, and the rate of extraction of coal working face coal has been effectively ensured, particularly can be coal working face
The Triangle Coal of two side bottoms is mined, effectively increases working face coal recovery rate, and the rate of extraction improves more than 2%, increases coal
Yield, economic and social benefit are notable.
Claims (1)
1. a kind of method that three soft high seam tunnel ensures the rate of extraction along top driving longwall top coal caving, it is characterised in that including following
Step：
1）, set coal working face both sides tunnel：Drift section uses rectangular cross section, the wide 4.0m in tunnel, and tunnel is along roof
Driving, head-room 3.0m, tunnel uses anchor rete cord active support；
2）, working face form：Tunneled along three soft high seam tunnels along top plate to behind section boundary, by the tunnel of length 20.0m to
Lower digging bottom 3m, makes tunnel along seat earth, this section road height 6.0m；
3）And then two roadway linkings are formed into open-off cut, height 3.0m along bottom plate driving；
4）, lay working face caving roof coal hydraulic support, conveyer, coalcutter, the end point that working face is connected with both sides tunnel
Two frame high working face end hydraulic supports of each arrangement, high working face end hydraulic support both sides are equipped with the face guard of 3.0m, prevent both sides
Coal enters in high working face end hydraulic support；
5）, working face extraction：In exploitation process, bottom driving is dug in two tunnels in advance all the time, and the coal of driving is conveyed by elevating conveyor
To the drag conveyor of working face or the belt conveyor in tunnel, it is ensured that the bottom plate of tunnel and working face is located at approximately the same plane,
Triangle Coal is not stayed, so that ensure the rate of extraction of working face coal,
Specifically, realized by following steps：
1）, coal working face tunnel is set：Rectangular cross section tunnel, the wide 4.0m in tunnel are excavated, tunnel is tunneled along roof, tunnel
Height 3.0m, coal working face（1）It is goaf below（4）, coal working face tunnel is in coal seam（3）Inside it is provided with and coal-getter
The advanced digging bottom section being connected as face（2）, bolt-mesh-anchor support then is used to tunnel, method is, in coal seam（3）Coal work
Face both sides along directly push up（9）Tunnel the tunnel for coal of keeping on file（15）, the tunnel for coal of keeping on file（15）Both sides are provided with for supported laneway
Anchor pole（7）, mounting of roof plate has anchor cable（8）, anchor cable（8）Through directly top（9）It is anchored at old top（10）On, coal working face
（1）There is broken coal at the top of interior caving roof coal hydraulic support（12）, with coal working face（1）Under the tunnel of connection needs in advance
Dig and form advanced excavation section（2）, with coal working face（1）The tunnel both ends of connection are equipped with high working face end hydraulic support, adopt greatly
High end hydraulic supporting structure includes column（14）With the face guard of high working face end hydraulic support（13）Form face end
Supporting；
2）, advanced dig bottom section：Three soft high seam tunnels are tunneled to coal seam along top plate（3）Behind border, along the section of tunnel length 20m
The advanced of 3m long is dug downwards digs bottom section（2）, make tunnel along seat earth（11）Arrangement, the height 6m of this section；
3）, along bottom plate driving two roadway linkings are formed into open-off cuts, method is, along seat earth（11）, will be advanced during excavation
Dig bottom section（2）Two roadway linkings formed, into open-off cut, height 3m；
4）, lay coal working face caving roof coal hydraulic support（6）With high working face end hydraulic support（5）, and in coal work
Conveyer, coalcutter are placed in face, and two ends are each to arrange two frame high working face end hydraulic supports due to highly excessive（5）, high working face
End hydraulic support（5）Including column（13）, and the face guard of high working face end hydraulic support both sides 3.0m, prevent both sides coal
Charcoal enters in high working face end hydraulic support；
5）Coal working face back production：In exploitation process, bottom section is dug on tunnel both sides in advance all the time（2）Driving, and mine, tunnel
Coal the drag conveyor of coal working face or the belt conveyor in tunnel are transported to by elevating conveyor, it is ensured that tunnel and coal-getter
The bottom plate for making face is located at approximately the same plane, and the Triangle Coal two side bottom of coal working face is mined, to ensure coal work
The rate of extraction of face coal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510485050.8A CN105134212B (en) | 2015-08-10 | 2015-08-10 | A kind of method that three soft high seam tunnel ensures the rate of extraction along top driving longwall top coal caving |
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| CN201510485050.8A CN105134212B (en) | 2015-08-10 | 2015-08-10 | A kind of method that three soft high seam tunnel ensures the rate of extraction along top driving longwall top coal caving |
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| CN105134212B true CN105134212B (en) | 2018-05-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105888664A (en) * | 2016-04-06 | 2016-08-24 | 中国神华能源股份有限公司 | Mining method for extremely-thick hard coal |
| CN111946345A (en) * | 2016-04-06 | 2020-11-17 | 中国神华能源股份有限公司 | Fully-mechanized caving mining method for layering under ultra-thick hard coal |
| CN107165664B (en) * | 2017-07-11 | 2019-04-30 | 河南理工大学 | A kind of slope thick seam edge top driving lane superelevation stope drift active workings Qie Dingliu method |
| CN111963194B (en) * | 2020-08-21 | 2021-08-31 | 内蒙古维维能源有限公司 | Roadway arrangement method based on irregular mining area |
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| CN101915099B (en) * | 2010-07-31 | 2012-07-25 | 太原理工大学 | Bidirectional U-shaped coal-mining method of thick coal bed by gateway layout along stability layer |
| CN102817620B (en) * | 2012-08-13 | 2014-07-23 | 大同煤矿集团有限责任公司 | Method for supporting ultra-thick and fluffy coal roadway |
| CN103195427A (en) * | 2013-04-09 | 2013-07-10 | 中国矿业大学 | Top-shoveling and bottom-cutting type full-seam mining fully-mechanized coal mining method for extrasoft thick coal seam |
| CN103291304A (en) * | 2013-06-28 | 2013-09-11 | 中国矿业大学 | Recovery method of super mining height top coal on fully mechanized coal mining face |
| CN103410515B (en) * | 2013-08-23 | 2015-09-16 | 山东科技大学 | It is a kind of that three-soft seam is reciprocating combines mining method without coal column |
| CN104405392B (en) * | 2014-10-16 | 2016-06-08 | 河南理工大学 | Three soft high seam tunnel jackings are kept on file anchor rete cord active support longwall top coal caving method |
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