CN103939135A - Rapid construction method for support dismantling channel of fully mechanized coal mining face - Google Patents
Rapid construction method for support dismantling channel of fully mechanized coal mining face Download PDFInfo
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- CN103939135A CN103939135A CN201410191621.2A CN201410191621A CN103939135A CN 103939135 A CN103939135 A CN 103939135A CN 201410191621 A CN201410191621 A CN 201410191621A CN 103939135 A CN103939135 A CN 103939135A
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Abstract
The invention discloses a rapid construction method for a support dismantling channel of a fully mechanized coal mining face. The rapid construction method is applicable to construction of the dismantling channel of the fully mechanized coal mining face under the coal mine hard roof geological condition. The method comprises the steps that a roof is weakened, and when it is guaranteed that the distance from the front canopy end of a hydraulic support to a mining stop line reaches the designed width of the support dismantling channel, the hard roof is cracked at the tail end of a top beam of the hydraulic support; when the distance from the front canopy end of the hydraulic support to the mining stop line reaches the designed width of the support dismantling channel, support transfer is stopped, and accordingly the hydraulic support reaches a setting load; under the supporting and protecting function of the hydraulic support, the mine ground pressure borne by the support dismantling channel is reduced obviously, and thus surrounding rock control over the support dismantling channel can be better achieved. A coal face inclined cutting feeding mode is adopted, coal bodies in the support dismantling channel can be extracted gradually, the roof is supported and protected, the steps are executed repeatedly, and finally construction of the entire support dismantling channel is achieved by continuously extending in the working face machine tail direction. The method is easy to operate, safe and reliable, high in efficiency, and capable of accelerating the construction progress of the support dismantling channel remarkably and shortening the working face moving time.
Description
Technical field
The present invention relates to fully-mechanized mining working and remove frame passage rapid constructing method, especially a kind of tight roof fully-mechanized mining working being applicable under tight roof geological conditions is removed frame passage rapid constructing method.
Background technology
The develop rapidly of modern science and technology is that coal in China industry has been brought boundless vital force, raising along with coal industry technical level, large quantities of Modern Pits with high content of technology, that production efficiency is high, good in economic efficiency are successively constructed and put into operation, greatly promote coal industry integral production level, fully mechanized coal winning technology becomes coal mining main flow.
Can the removal of home preparation of fully-mechanized mining working be that can a n-th-trem relation n to ore deposit complete normal production and take over, realize the important process of stable and high yields.The continual and steady sound development that it is produced for mine has very important strategic importance, says to a certain extent, has done a good job of it the removal of home preparation of fully-mechanized mining working, also, with regard to having created good condition for the safety in production of mine, has established solid foundation.Wherein, remove frame passage and be the necessary condition that guarantees that working face equipment is withdrawn from smoothly, and the rapid construction of removing frame passage can promote that digging operation is normally connected.
At present, China's fully-mechanized mining working is removed the formation of frame passage and is mainly contained 2 kinds of modes: first kind of way is to excavate in advance return channel, and the direct admission passage of support withdraws; The second way is when support is shifted withdrawing position onto, by coal-winning machine coal cutting, and sets anchor pole, anchor cable, forms return channel.
Excavate in advance and remove frame passage and have in advance construction, driving is subject to the advantages such as external influence factor is less with supporting.But due in working face extraction process, stand the once impact of leading bearing pressure, need to install the maintenance that brettis is strengthened passage, simultaneously leading bearing pressure will make passage before perforation, produce gross distortion, cause and remove frame channel space deficiency, affect hydraulic support withdrawing efficiency, remove frame space availability ratio low; And due to the existence of brettis, also can affect rack restoring efficiency; Simultaneously driving is removed frame passage and is also needed the ventilation resource outside occupying volume in advance.What adopt that the second way forms removes frame passage, have and not affected by leading bearing pressure, surrouding rock stress is less, need not set up brettis, can use transportation and the ventilation system of coal-face, and utilize hydraulic support to carry out temporary lining to top board simultaneously, the advantage such as number that per tour can be constructed is simultaneously more, but also there is following shortcoming: remove the impact that lives through leading bearing pressure before frame passage forms, the rib scope of meeting head on is larger, to rib, need take corresponding anti-slabbing measure; Coal wall caving is serious, and need under hydraulic support, to top board, set anchor pole (rope) controlroof, and frame passage impact construction is removed in impact, and has hidden danger.Meanwhile, roofbolt anchor cable is constructed under support, impact construction.
Summary of the invention
Technical problem: the object of the invention is to overcome the deficiency that existing fully-mechanized mining working is removed frame channel construction method, provide the tight roof fully-mechanized mining working that a kind of method is simple, safe and reliable, efficiency is high to remove frame passage rapid constructing method.
Technical scheme: tight roof fully-mechanized mining working of the present invention is removed frame passage rapid constructing method, comprises the steps:
A, employing hydraulic fracture or presplitting technique weaken top board in two stope drift active workings at coal-face rear, guarantee that hydraulic support forestope end reaches and removes frame channels designs width b apart from the distance of stopping adopting line, makes tight roof rupture at hydraulic support top beam end;
B, when the forestope end of hydraulic support reaches while removing frame channels designs width b apart from the distance of stopping adopting line, stop moving frame, and make hydraulic support reach setting load;
C, the attachment pegs that drag conveyor is connected with hydraulic support are removed, and with hydraulic prop, replace the connecting rod between drag conveyor and hydraulic support, by hydraulic prop, pass drag conveyor;
D, the coal-winning machine on riding over drag conveyor move to middle part and cut sth. askew feed starting point during apart from the distance L of head, and to handpiece of scraper conveyer direction, according to the coal-face middle part tool feeding method of cutting sth. askew, progressively the coal body in frame passage is removed in back production; Whenever the space width in hydraulic support the place ahead reaches while removing frame channels designs width b, adopt hydraulic prop and large plate-girder to coordinate support pattern in time top board to be carried out to supporting;
E, along with the feed work cycle of repeatedly cutting sth. askew, constantly to working surface tail direction, extend, the complete all coal bodies removed in frame passage of back production, and remove the roof timbering in frame passage, finally complete the construction of removing frame full tunnel.
The described middle part feed starting point of cutting sth. askew is 30～40m apart from the distance L of head, and the feed work cycle of cutting sth. askew number of times is 3～4 times.
Beneficial effect: the present invention has overcome the deficiency that conventional coal-face is removed frame channel construction method, by top board is weakened, hydraulic support forestope end is reached while removing frame channels designs width apart from the distance of stopping adopting line, and tight roof ruptures at hydraulic support top beam end; And when hydraulic support forestope end reaches while removing frame channels designs width apart from the distance of stopping adopting line, stop moving frame, and make hydraulic support reach setting load; Under hydraulic support stand effect, remove the mine pressure that frame passage bears and significantly reduce, be conducive to remove frame passage Surrounding Rock Control.On the other hand, the attachment pegs that drag conveyor is connected with hydraulic support is removed, and with hydraulic prop, replaces the connecting rod between drag conveyor and hydraulic support, by hydraulic prop, passes drag conveyor, according to the tool feeding method of cutting sth. askew in the middle part of coal-face, progressively the coal body in frame passage is removed in back production, whenever the space width in hydraulic support the place ahead reaches while removing frame channels designs width, just adopt hydraulic prop and large plate-girder to coordinate support pattern in time top board to be carried out to supporting, complete and remove frame passage rapid construction once supporting, overcome conventional drawback of removing the supporting repeatedly of repeatedly constructing in frame channel construction method, for example routine is removed 1/3 width of first constructing in frame channel construction method and is removed frame passage, just top board is carried out to supporting, when construction 2/3 width is removed frame passage, again top board is carried out to supporting, when construction complete design width is removed frame passage, finally top board is carried out to supporting, frame passage construction progress is removed in the repeatedly supporting of repeatedly constructing impact.The present invention is simple to operate, safe and reliable, and efficiency is high, has practicality and generalization widely.
Accompanying drawing explanation
Fig. 1 is that tight roof fully-mechanized mining working of the present invention is removed frame passage rapid constructing method schematic diagram.
In figure: 1-hydraulic prop, the large plate-girder of 2-, 3-hydraulic support, 4-coal-winning machine, 5-drag conveyor, 6-goaf,
The feed starting point of cutting sth. askew in the middle part of L-is apart from the distance of head, and b-removes frame channels designs width.
The specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are further described:
As shown in Figure 1, tight roof fully-mechanized mining working of the present invention is removed frame passage rapid constructing method, and concrete steps are as follows:
A, employing hydraulic fracture or presplitting technique weaken top board in two stope drift active workings at coal-face rear, guarantee that hydraulic support forestope end reaches and removes frame channels designs width b apart from the distance of stopping adopting line, makes tight roof rupture at hydraulic support top beam end;
B, when the forestope end of hydraulic support 3 reaches while removing frame channels designs width b apart from the distance of stopping adopting line, stop moving frame, and make hydraulic support reach setting load;
C, the attachment pegs that drag conveyor 5 is connected with hydraulic support 3 are removed, and the connecting rod of replacing between drag conveyor 5 and hydraulic support 3 with hydraulic prop 1 is passed drag conveyor 5 by hydraulic prop 1;
D, the coal-winning machine on riding over drag conveyor 54 move to middle part and cut sth. askew feed starting point while being 30～40m apart from the distance L of head, and to handpiece of scraper conveyer direction, according to the coal-face middle part tool feeding method of cutting sth. askew, progressively the coal body in frame passage is removed in back production; Whenever the space width in hydraulic support 3 the place aheads reaches while removing frame channels designs width b, adopt hydraulic prop 1 and large plate-girder 2 to coordinate support patterns in time top board to be carried out to supporting;
E, along with 3～4 feed work cycle of cutting sth. askew, constantly to working surface tail direction, extend, the complete all coal bodies removed in frame passage of back production, and remove the roof timbering in frame passage, finally complete the construction of removing frame full tunnel.
Example 1, the average 2.56m of certain Seams thickness, average 4 ° of seam inclination, immediate roof is limestone, average thickness 8.5m, the average 101.6MPa of unidirectional compressive strength, belongs to solidly top board, the long 143.9m of work plane inclination, face roof supporting adopts 4 ZT13200-16/30 type face end supports and 96 ZZ6000-17/32 type supports, and it is 0.6m that coal-winning machine cuts dark.
Remove frame passage enforcement concrete steps as follows:
In a, fully-mechanized mining working exploitation process, in advance in its place ahead two crossheadings, to the long drilled holes of constructing in work plane, adopt directed hydraulic fracturing technology to weaken top board, guarantee that beam-ends before hydraulic support reaches while removing frame channels designs width 2.5m apart from the distance of stopping adopting line, makes tight roof rupture at hydraulic support top beam end;
B, when hydraulic support forestope end reaches while removing frame channels designs width 2.5m apart from the distance of stopping adopting line, stop moving frame, and make it reach setting load;
C, the attachment pegs that drag conveyor is connected with hydraulic support are removed, and with hydraulic prop, replace the connecting rod between drag conveyor 5 and hydraulic support, by hydraulic prop, pass drag conveyor;
D, the empty cutter of coal-winning machine 4 riding on drag conveyor 5 moves to while being 30m～40m apart from the distance L of work plane head, with fluid injection gun to hydraulic prop 1 fluid injection successively within the scope of work plane head 30m～40m, pass drag conveyor, simultaneously according to the tool feeding method of cutting sth. askew in the middle part of coal-face, progressively the coal body in frame passage is removed in back production, complete and cut sth. askew for 4 times after the circulation of feed stoping operation, when the space width in hydraulic support the place ahead reaches while removing frame channels designs width 2.5m, adopt hydraulic prop and large plate-girder to coordinate support pattern in time top board to be carried out to supporting,
E, repeat above step, constantly to working surface tail direction, extend, until the complete all coal bodies removed in frame passage of back production, and remove the roof timbering in frame passage, finally complete the construction of removing frame full tunnel.
Claims (2)
1. fully-mechanized mining working is removed a frame passage rapid constructing method, it is characterized in that, comprises the steps:
A, employing hydraulic fracture or presplitting technique weaken top board in two stope drift active workings at coal-face rear, guarantee that hydraulic support forestope end reaches and removes frame channels designs width b apart from the distance of stopping adopting line, makes tight roof rupture at hydraulic support top beam end;
B, when the forestope end of hydraulic support (3) reaches while removing frame channels designs width b apart from the distance of stopping adopting line, stop moving frame, and make hydraulic support reach setting load;
C, the attachment pegs that drag conveyor (5) is connected with hydraulic support (3) are removed, with hydraulic prop (1), replace the connecting rod between drag conveyor (5) and hydraulic support (3), by hydraulic prop (1), pass drag conveyor (5);
D, the coal-winning machine (4) on riding over drag conveyor (5) move to middle part and cut sth. askew feed starting point during apart from the distance L of head, to handpiece of scraper conveyer direction, according to the tool feeding method of cutting sth. askew in the middle part of coal-face, progressively the coal body in frame passage is removed in back production; Whenever the space width in hydraulic support (3) the place ahead reaches while removing frame channels designs width b, adopt hydraulic prop (1) and large plate-girder (2) cooperation support pattern in time top board to be carried out to supporting;
E, along with the feed work cycle of repeatedly cutting sth. askew, constantly to working surface tail direction, extend, the complete all coal bodies removed in frame passage of back production, and remove the roof timbering in frame passage, finally complete the construction of removing frame full tunnel.
2. tight roof fully-mechanized mining working according to claim 1 is removed frame passage rapid constructing method, it is characterized in that: the described middle part feed starting point of cutting sth. askew is 30～40m apart from the distance L of head, and the feed work cycle of cutting sth. askew number of times is 3～4 times.
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| CN104847406A (en) * | 2015-03-25 | 2015-08-19 | 中国矿业大学 | Method for fracturing retained filled wall of adjacent coal face |
| CN106089234A (en) * | 2016-07-15 | 2016-11-09 | 北京科技大学 | A kind of method of distance auxiliary lane multichannel Quick-return fully-mechanized mining working |
| CN106593529A (en) * | 2017-01-24 | 2017-04-26 | 四川川煤华荣能源股份有限公司 | Forming method for retracting channel of fully mechanized coal mining face device with large dip angle and large mining height |
| CN109268049A (en) * | 2018-08-08 | 2019-01-25 | 中国神华能源股份有限公司 | Fully-mechanized mining working withdraws method |
| CN109339789A (en) * | 2018-11-30 | 2019-02-15 | 山西平阳广日机电有限公司 | A kind of support electrohydraulic control system beveling feed control method |
| CN112065395A (en) * | 2020-09-16 | 2020-12-11 | 刘雪 | Method for quickly withdrawing fully-mechanized coal mining face |
| CN114352286A (en) * | 2021-12-10 | 2022-04-15 | 安徽恒源煤电股份有限公司 | Quick construction supporting method for fully mechanized coal mining face frame removing channel |
| CN115199272A (en) * | 2022-08-11 | 2022-10-18 | 中国矿业大学 | Full-life-cycle surrounding rock stability control method for fully-mechanized mining face pre-excavation withdrawal passage |
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Cited By (10)
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| CN104847406A (en) * | 2015-03-25 | 2015-08-19 | 中国矿业大学 | Method for fracturing retained filled wall of adjacent coal face |
| CN106089234A (en) * | 2016-07-15 | 2016-11-09 | 北京科技大学 | A kind of method of distance auxiliary lane multichannel Quick-return fully-mechanized mining working |
| CN106089234B (en) * | 2016-07-15 | 2018-05-25 | 北京科技大学 | A kind of method of the auxiliary lane multichannel Quick-return fully-mechanized mining working of long range |
| CN106593529A (en) * | 2017-01-24 | 2017-04-26 | 四川川煤华荣能源股份有限公司 | Forming method for retracting channel of fully mechanized coal mining face device with large dip angle and large mining height |
| CN109268049A (en) * | 2018-08-08 | 2019-01-25 | 中国神华能源股份有限公司 | Fully-mechanized mining working withdraws method |
| CN109339789A (en) * | 2018-11-30 | 2019-02-15 | 山西平阳广日机电有限公司 | A kind of support electrohydraulic control system beveling feed control method |
| CN112065395A (en) * | 2020-09-16 | 2020-12-11 | 刘雪 | Method for quickly withdrawing fully-mechanized coal mining face |
| CN114352286A (en) * | 2021-12-10 | 2022-04-15 | 安徽恒源煤电股份有限公司 | Quick construction supporting method for fully mechanized coal mining face frame removing channel |
| CN115199272A (en) * | 2022-08-11 | 2022-10-18 | 中国矿业大学 | Full-life-cycle surrounding rock stability control method for fully-mechanized mining face pre-excavation withdrawal passage |
| CN115199272B (en) * | 2022-08-11 | 2023-07-18 | 中国矿业大学 | Full life cycle surrounding rock stability control method for fully mechanized mining face pre-digging retracting channel |
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