CN105134212A - Method for ensuring fully-mechanized top coal caving recovery rate of three-soft thick coal seam roadway tunneling along top - Google Patents

Method for ensuring fully-mechanized top coal caving recovery rate of three-soft thick coal seam roadway tunneling along top Download PDF

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CN105134212A
CN105134212A CN201510485050.8A CN201510485050A CN105134212A CN 105134212 A CN105134212 A CN 105134212A CN 201510485050 A CN201510485050 A CN 201510485050A CN 105134212 A CN105134212 A CN 105134212A
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coal
tunnel
along
working
hydraulic support
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CN105134212B (en
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徐学锋
刘少伟
宋勤法
于涛
张辉
姜彦军
唐炎森
姚丙傲
何小军
张�浩
李正可
庞龙龙
司亮
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Henan University of Technology
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Henan University of Technology
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Abstract

The invention relates to a method for ensuring the fully-mechanized top coal caving recovery rate of three-soft thick coal seam roadway tunneling along top, and effectively solves the problem of ensuring the fully-mechanized top coal caving recovery rate of three-soft thick coal seam roadway tunneling along top. The method includes: employing a rectangular tunnel cross-section, conducting tunneling along coal seam roof, and performing bolt-mesh-anchor active support; performing tunneling along the tunnel roof to a mining area boundary, and carrying out bottom digging downward to make the tunnels along the coal seam floor; conducting tunneling along the seam floor to hole through two roadways so as to form open-off cut; laying a caving coal hydraulic support, a conveyor and a coal mining machine on a working surface, arranging two large mining height end hydraulic supports respectively at the ends connecting the working surface and the two side roadways, making the two roadways always in an advanced bottom digging tunneling state, conveying the tunnelled coal to a working surface conveyor by a loading machine, ensuring the tunnels and the bottom plate of the working surface always at one plane triangle coal and leaving no triangle coal. The method provided by the invention has the advantages of simplicity, easy operation and use, low cost and good effect, can effectively guarantee the fully-mechanized top coal caving recovery rate of three-soft thick coal seam roadway tunneling along top, and improves coal production output.

Description

A kind of three soft high seam tunnels ensure the method for the rate of extraction along top driving longwall top coal caving
Technical field
The present invention relates to Coal Mining Technology, particularly a kind of three soft high seam tunnels ensure the method for the rate of extraction along top driving longwall top coal caving.
Background technology
For Seam Roof And Floor and all smaller three-soft seam of coal strength, refer to the high seam of about coal seam thickness 6.0m, mainly adopt separate zone production, high working face once to adopt entirely thick, Sub-Level Caving once adopts thick three kinds of methods entirely.During separate zone production, tunnel repeats to arrange, efficiency is low, and large-mining-height working surface once adopts the problem of complete thick easy generation working face wall wall caving, and top coal caving is a kind of comparatively safe efficient method.
It is be the coal-face of 2 ~ 3m along backplane mining height of high seam that high seam longwall top coal caving once adopts entirely thick coal-mining method, arrange caving roof coal hydraulic support, the a set of drag conveyor of each layout before and after support, the coal that scrapper conveyor conveying coal-winning machine is above cut off, the coal that support scrapper conveyor conveying top board is below released by coal discharge outlet.
Coal stope and roadways layout, stope both sides, coal seam respectively arrange a tunnel and work plane be connected to form ventilate, transportation system and emergency exit.The current popularity anchor pole of roadway support, anchor cable active support mode.The tunnel of work plane both sides can be arranged along roof, also can arrange along seat earth.If arranged along seat earth, work plane is more straight with tunnel connecting portion, and work plane coal recovery rate is higher, but under three-soft seam condition, back is the cherry coal that intensity is little, adopts the difficulty of bolting and rope support large, easily roof collapse disaster occurs.If tunnel is arranged along roof, top board is rock stratum, adopt bolt and cable anchor supporting can play the effect of controlroof, but because work plane is along backplane, so work plane and tunnel connecting portion need to raise gradually, form " ship " shape, during back production, work plane and tunnel connecting portion easily leave over a large amount of Triangle Coal, affect the rate of extraction of work plane coal.
For above analysis, to the three-soft seam with about coal seam thickness 6.0m, adopt mining coal-mining method, the tunnel of work plane both sides is arranged along roof, bolt-mesh-anchor support is adopted to be one coal winning technology safely and efficiently, how the Triangle Coal below work plane and tunnel connecting portion is exploited out during working face extraction simultaneously, work plane is in line by " ship " deformation, ensure that work plane coal recovery rate is the technical issues that need to address.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the object of the present invention is just to provide a kind of three soft high seam tunnels ensure rate of extraction method along top driving longwall top coal caving, effectively can solve three soft high seam tunnels ensure rate of extraction problem along top driving longwall top coal caving.
The technical scheme that the present invention solves comprises the following steps:
(1), arrange tunnel, coal-face both sides: drift section adopts rectangular cross section, the wide 4.0m in tunnel, and tunnel is tunneled along roof, head-room 3.0m, tunnel adopts anchor rete cord active support;
(2), work plane is formed: after tunneling section boundary along three soft high seam tunnels along top board, end 3m is dug in the tunnel of length 20.0m downwards, makes tunnel along seat earth, this section road height 6.0m;
(3), then along base plate driving, two roadway linkings are formed open-off cut, height 3.0m;
(4) caving roof coal hydraulic support, conveyer, the coal-winning machine of work plane, is laid, two frame high working face end hydraulic supports are respectively arranged in the end that work plane is connected with tunnel, both sides, high working face end hydraulic support both sides are provided with the face guard of 3.0m, prevent both sides coal from entering in high working face end hydraulic support;
(5), working face extraction: in exploitation process, article two, end driving is dug in tunnel all the time in advance, the coal of driving is transported to the drag conveyor of work plane or the belt conveyor in tunnel by elevating conveyor, guarantee that the base plate of tunnel and work plane is positioned at same plane, do not stay Triangle Coal, thus ensure the rate of extraction of work plane coal.
The inventive method is simple, easy to operate, and cost is low, effective, and effectively can ensure the rate of extraction of three soft high seam tunnels along top driving longwall top coal caving, improve coal production output, economic and social benefit is remarkable.
Accompanying drawing explanation
Fig. 1 is that the soft high seam tunnel of the present invention three is along top driving longwall top coal caving floor map.
Fig. 2 be in Fig. 1 of the present invention A-A to generalized section.
Fig. 3 be in Fig. 1 of the present invention B-B to generalized section.
Fig. 4 be in Fig. 1 of the present invention C-C to generalized section.
Detailed description of the invention
Below in conjunction with accompanying drawing and concrete condition, the specific embodiment of the present invention is elaborated.
Shown in Fig. 1-4, the present invention, in concrete enforcement, is realized by following steps:
(1), coal-face tunnel is set: excavation rectangular cross section tunnel, the wide 4.0m in tunnel, tunnel is tunneled along roof, head-room 3.0m, coal-face 1 is goaf 4 below, coal-face tunnel be provided with in coal seam 3 be connected with coal-face dig end section 2(in advance as shown in Figure 1), then bolt-mesh-anchor support is adopted to tunnel, method is, to keep on file the tunnel 15 of coal along immediate roof 9 driving in the coal-face both sides in coal seam 3, keep on file the both sides, tunnel 15 of coal are provided with anchor pole 7 for supported laneway, mounting of roof plate has anchor cable 8, anchor cable 8 is anchored on old top 10 (as shown in Figure 4) through immediate roof 9, there is broken coal 12(at caving roof coal hydraulic support top in coal-face 1 as shown in Figure 2), dig to be formed under the tunnel needs be communicated with coal-face 1 are advanced and excavate section 2 in advance, high working face end hydraulic support is equipped with at the two ends, tunnel be communicated with coal-face 1, high working face end hydraulic support structure comprises the face guard 13(of column 14 and high working face end hydraulic support as shown in Figure 3) form face end supporting,
(2) dig end section, in advance: after border, coal seam 3 is tunneled along top board in three soft high seam tunnels, the section along tunnel length 20m dig downwards 3m long dig end section 2 in advance, tunnel is arranged, the height 6m of this section along seat earth 11;
(3), along base plate driving two roadway linkings are formed open-off cuts, method is, when excavating along seat earth 11, by two roadway linkings digging end section 2 in advance and formed, becomes open-off cut, height 3m;
(4) caving roof coal hydraulic support 6 and the high working face end hydraulic support 5 of coal-face, is laid, and place conveyer, coal-winning machine at coal-face, two ends is due to highly excessive, each layout two frame high working face end hydraulic support 5, high working face end hydraulic support 5 comprises column 13, and the face guard (as shown in Figure 3) of high working face end hydraulic support both sides 3.0m, prevent both sides coal from entering in high working face end hydraulic support;
(5) coal-face back production: in exploitation process, both sides, tunnel are dug end section 2 all the time in advance and are tunneled, and mine, the coal of driving is transported to the drag conveyor of coal-face or the belt conveyor in tunnel by elevating conveyor, guarantee that the base plate of tunnel and coal-face is positioned at same plane, the Triangle Coal of coal-face two side bottom is exploited out, to ensure the rate of extraction of coal-face coal.
The inventive method is simple, easy to operate, and cost is low, effective, and through site trial and application, prove use safety, reliable and stable, production efficiency is high, effectively ensure that the rate of extraction of coal-face coal, particularly the Triangle Coal of coal-face two side bottom can be exploited out, effectively improve work plane coal recovery rate, the rate of extraction improves more than 2%, and increase coal production, economic and social benefit is remarkable.

Claims (2)

1. three soft high seam tunnels ensure a method for the rate of extraction along top driving longwall top coal caving, it is characterized in that, comprise the following steps:
1), arrange tunnel, coal-face both sides: drift section adopts rectangular cross section, the wide 4.0m in tunnel, and tunnel is tunneled along roof, head-room 3.0m, tunnel adopts anchor rete cord active support;
2), work plane is formed: after tunneling section boundary along three soft high seam tunnels along top board, end 3m is dug in the tunnel of length 20.0m downwards, makes tunnel along seat earth, this section road height 6.0m;
3), then along base plate driving, two roadway linkings are formed open-off cut, height 3.0m;
4) caving roof coal hydraulic support, conveyer, the coal-winning machine of work plane, is laid, two frame high working face end hydraulic supports are respectively arranged in the end that work plane is connected with tunnel, both sides, high working face end hydraulic support both sides are provided with the face guard of 3.0m, prevent both sides coal from entering in high working face end hydraulic support;
5), working face extraction: in exploitation process, article two, end driving is dug in tunnel all the time in advance, the coal of driving is transported to the drag conveyor of work plane or the belt conveyor in tunnel by elevating conveyor, guarantee that the base plate of tunnel and work plane is positioned at same plane, do not stay Triangle Coal, thus ensure the rate of extraction of work plane coal.
2. three soft high seam tunnels according to claim 1 ensure the method for the rate of extraction along top driving longwall top coal caving, it is characterized in that, are realized by following steps:
1), coal-face tunnel is set: excavation rectangular cross section tunnel, the wide 4.0m in tunnel, tunnel is tunneled along roof, head-room 3.0m, coal-face (1) is goaf (4) below, coal-face tunnel be provided with in coal seam (3) be connected with coal-face dig end section (2) in advance, then bolt-mesh-anchor support is adopted to tunnel, method is, to keep on file the tunnel (15) of coal along immediate roof (9) driving in the coal-face both sides of coal seam (3), keep on file tunnel (15) both sides of coal are provided with anchor pole (7) for supported laneway, mounting of roof plate has anchor cable (8), anchor cable (8) is anchored on old top (10) through immediate roof (9), broken coal (12) is arranged at the caving roof coal hydraulic support top in coal-face (1), the formation section of excavation (2) is in advance dug under the tunnel needs be communicated with coal-face (1) are advanced, high working face end hydraulic support is equipped with at the two ends, tunnel be communicated with coal-face (1), the face guard (13) that high working face end hydraulic support structure comprises column (14) and high working face end hydraulic support forms face end supporting,
2) dig end section, in advance: after coal seam (3) border is tunneled along top board in three soft high seam tunnels, the section along tunnel length 20m dig downwards 3m long dig end section (2) in advance, tunnel is arranged, the height 6m of this section along seat earth (11);
3), along base plate driving two roadway linkings are formed open-off cuts, method is, when excavating along seat earth (11), by two roadway linkings digging end section (2) in advance and formed, becomes open-off cut, highly 3m;
4) caving roof coal hydraulic support (6) and the high working face end hydraulic support (5) of coal-face, is laid, and place conveyer, coal-winning machine at coal-face, two ends is due to highly excessive, each layout two frame high working face end hydraulic support (5), high working face end hydraulic support (5) comprises column (13), and the face guard of high working face end hydraulic support both sides 3.0m, prevent both sides coal from entering in high working face end hydraulic support;
5) coal-face back production: in exploitation process, end section (2) driving is dug on both sides, tunnel all the time in advance, and mine, the coal of driving is transported to the drag conveyor of coal-face or the belt conveyor in tunnel by elevating conveyor, guarantee that the base plate of tunnel and coal-face is positioned at same plane, the Triangle Coal of coal-face two side bottom is exploited out, to ensure the rate of extraction of coal-face coal.
CN201510485050.8A 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 Active CN105134212B (en)

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CN105715272A (en) * 2016-04-06 2016-06-29 中国神华能源股份有限公司 Fully-mechanized caving mining method for lower slice of ultra-thick hard coal
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
CN107165664A (en) * 2017-07-11 2017-09-15 河南理工大学 A kind of slope thick seam tunnels superelevation stope drift active workings Qie Dingliu lanes method along top
CN111963194A (en) * 2020-08-21 2020-11-20 内蒙古维维能源有限公司 Roadway arrangement method based on irregular mining area

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Publication number Priority date Publication date Assignee Title
CN105715272A (en) * 2016-04-06 2016-06-29 中国神华能源股份有限公司 Fully-mechanized caving mining method for lower slice of ultra-thick hard coal
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
CN107165664A (en) * 2017-07-11 2017-09-15 河南理工大学 A kind of slope thick seam tunnels superelevation stope drift active workings Qie Dingliu lanes method along top
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
CN111963194A (en) * 2020-08-21 2020-11-20 内蒙古维维能源有限公司 Roadway arrangement method based on irregular mining area
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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