CN103899342A - Gob-side entrydriving coal pillar anchor cable through reinforcing method - Google Patents
Gob-side entrydriving coal pillar anchor cable through reinforcing method Download PDFInfo
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- CN103899342A CN103899342A CN201410150974.8A CN201410150974A CN103899342A CN 103899342 A CN103899342 A CN 103899342A CN 201410150974 A CN201410150974 A CN 201410150974A CN 103899342 A CN103899342 A CN 103899342A
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Abstract
The invention discloses a gob-side entrydriving coal pillar anchor cable through reinforcing method. A drilled hole is punched in a coal pillar in a down trough of an upper zone, a preset anchor cable is arranged in the drilled hole, concrete spraying layer spraying, thin hole pattern mounting, bar-mat reinforcement mounting and anchorage tray mounting are sequentially carried out on the side, punched with the drilled hole, of the coal wall, and a tapered end of the outer end of the anchor cable is fixed to an anchorage tray. After an up trough of a lower zone is tunneled, the preset anchor cable in the drilled hole of a new-tunneled roadway is lengthened, finally the same working procedure is executed, and the anchorage work is completed. The length of the preset anchor cable in the anchor cable drilled hole is smaller than the width of the coal pillar, and the length of the anchor cable drilled hole is larger than the width of the coal pillar. According to the lengthening process of the preset anchor cable, two segments of the anchor cable can be lengthened through a connecting device, or a telescopic anchor cable can be adopted, or a flexible and bendable anchor cable can be adopted. According to the coal pillar anchor cable through reinforcing method, the anchorage effect is obvious, and the stability of the coal pillar can be effectively ensured.
Description
Technical field
The present invention relates to a kind of gob side entry driving coal column anchor cable to wearing reinforcement means, relate in particular to a kind of gob side entry driving coal column anchor cable to wearing the method for reinforcing.
Background technology
Edge air gallery technology has significant technical advantage and economic benefit, can improve coal resources recovery ratio, reduces tunnelling amount, alleviate continue anxiety and cancel stress of coal pillar and concentrate of digging.To be conducive to mine safety production and to fall the great lane technology of protecting that cost increases benefit.Weak point is: 1. roadway support difficulty is larger, needs to build one " divider wall prop " along adopting an empty side, and divider wall prop should play the effect of supporting back, also will play the effect in isolation tunnel and goaf; 2. the supporting of prop divider wall is difficult to realize mechanization, and labor strength is larger.
The feature of the technology of gob side entry driving is: significantly reducing under the condition of section coal pillar loss, stay and establish the wide narrow coal column of 4-5 as " divider wall prop ".The advantage of gob side entry driving is: 1. adopt narrow coal column as " divider wall prop ", need not manually build isolation body of wall again, the constructional difficulties of avoiding, has avoided support material transport, has saved support material expense.2. coal road fully-mechanized digging machine tunneling construction efficiency is high now, and under general geological conditions, every drill footage per month is that 600m is to 1000m, so gob side entry driving is extremely easy to realize.
Gob side entry driving relies on narrow coal column to support back, so need to strengthen the strengthening supporting to narrow coal column, lacks effective supporting means in prior art.
Summary of the invention
The object of this invention is to provide a kind of gob side entry driving coal column anchor cable that can effective guarantee stability of coal pillar to wearing the method for reinforcing.
The object of the invention is to be achieved through the following technical solutions:
Gob side entry driving coal column anchor cable of the present invention, to wearing the method for reinforcing, comprises step:
Under upper curtate in crossheading to coal column drilling, anchor cable is installed in boring, and on the rib of drilling one side successively sprayed mortar spray-up, fine-meshed screen is installed, steel mesh reinforcement and anchoring tray is installed, the tapered end of described anchor cable outer end is fixed on described anchoring tray;
After on lower curtate, crossheading has tunneled, the anchor cable in described boring is lengthened, finally implement above-mentioned identical operation, complete anchoring work.
As seen from the above technical solution provided by the invention, the gob side entry driving coal column anchor cable that the embodiment of the present invention provides is to wearing the method for reinforcing, due to when the gob side entry driving, uses " coal column anchor cable is to wearing reinforcing technique ", anchoring effect is outstanding, stability that can effective guarantee coal column.
Brief description of the drawings
Fig. 1 be in the embodiment of the present invention gob side entry driving coal column anchor cable to wearing the structural representation of reinforcing;
Fig. 2 is length L 1 and anchor cable boring length L 2 schematic diagrames in coal pillar width L, anchor cable initial apertures;
Fig. 3 is the embodiment of the present invention one stream line docking schematic diagram;
Fig. 4 is extension type anchor cable schematic diagram in the embodiment of the present invention two;
Fig. 5 is flexible anchor cable schematic diagram in the embodiment of the present invention three.
Detailed description of the invention
To be described in further detail the embodiment of the present invention below.
Gob side entry driving coal column anchor cable of the present invention is to wearing the method for reinforcing, its preferably detailed description of the invention be:
Comprise step:
As shown in Figure 1 to Figure 3, under upper curtate in crossheading to coal column (that is: intending staying the wide narrow coal column of the 4-6m that establishes as " divider wall prop ") drilling, preset anchor cable is installed in boring, and on the rib of boring one side successively sprayed mortar spray-up, fine-meshed screen is installed, steel mesh reinforcement and anchoring tray is installed, the tapered end of described anchor cable outer end is fixed on described anchoring tray;
After on lower curtate, crossheading has tunneled, the preset anchor cable in described boring is lengthened, finally implement above-mentioned identical operation, complete anchoring work.
Why, adopt anchor cable lengthening technology, be because, if the length of preset anchor cable is more than or equal to the width of coal column in coal column, so in the time of the new coal road (coal road B) of mechanical drivage coal column opposite side, anchor cable likely can affect development machine construction, so the length of preset anchor cable in coal column is less than coal pillar width.Like this, just need to add long anchor cable in new coal road (coal road B) side.As shown in Figures 3 to 5.
On the other hand, in order to ensure after new coal road B excavates, can simple and conveniently in new coal road B find anchor cable in coal column to hole, can be in the time constructing anchor cable boring early stage, the length of anchor cable boring is greater than to coal pillar width, so,, after new coal road B excavates, anchor cable boring just can reveal.As shown in Figure 2.
The lengthening of described anchor cable adopts following any method:
By linkage, two sections of anchor cables are connected anchor cable is lengthened, as shown in Figure 3.
Adopt extension type anchor cable, by elongating anchor cable, it is lengthened, as shown in Figure 4.
Adopt flexible anchor cable, first by installing in boring after the doubling of anchor cable one end, after crossheading B has tunneled on lower curtate, then the anchor cable of doubling is stretched anchor cable is lengthened, as shown in Figure 5.
Gob side entry driving coal column anchor cable of the present invention, to wearing the method for reinforcing, in the time of gob side entry driving, uses " coal column anchor cable is to wearing reinforcing technique ", can solve following technical problem:
(1) anchor cable is to wearing: the two ends of anchor cable, in the both sides of coal column, can ensure anchorage reliability, in new pick tunnel B, can apply larger first anchor-hold, and an anchor cable can play the mechanical function of two anchor cables, and anchoring effect is outstanding;
(2) reasonably arrange array pitch between anchor cable, stability that can effective guarantee coal column.
(3) can effectively control " narrow coal column " stability in goaf one side coal side.This is that other coal column reinforcement means are difficult to accomplish.
(4) can reduce coal column its support reinforcement material cost, accelerate the support speed in new pick B lane.
Specific embodiment one:
As shown in Figure 1, Figure 2 and Figure 3, in crossheading under upper curtate (crossheading A), to coal column drilling, preset anchor cable is installed, then at crossheading A rib one side sprayed mortar spray-up successively, fine-meshed screen, steel mesh reinforcement and anchoring tray is installed, complete anchoring work.After crossheading on lower curtate (crossheading B) has tunneled, the preset anchor cable in coal column boring is carried out to spreading, finally implement above-mentioned same processes, complete anchoring work.
In the present invention, gob side entry driving adopts anchor cable can apply larger anchored force to coal column to wearing reinforcing technique, improves the support strength of coal column, ensures the long-time stability of coal column.In addition this technology easy construction, advanced technology, economical rationality.
Specific embodiment two:
As shown in Figure 4, adopt extension type anchor cable, the technical scheme in construction method and embodiment mono-is basically identical.Preset anchor cable in the boring of coal column anchor cable adopts extension type anchor cable, after crossheading has tunneled on lower curtate, in the one end by new pick tunnel B mono-side, makes its lengthening by elongating anchor cable; Anchor cable is to wearing schematic diagram 4.
Specific embodiment three:
As shown in Figure 5, adopt flexible anchor cable, the technical scheme in construction method and embodiment mono-is basically identical.Preset anchor cable in the boring of coal column anchor cable adopts flexible anchor cable, first by installing in the boring of coal column anchor cable after the doubling of anchor cable one end, after on lower curtate, crossheading has tunneled, in the one end by new pick tunnel B mono-side, stretching the anchor cable of the doubling anchor cable that makes is lengthened.Anchor cable is to wearing schematic diagram 5.
Key problem in technology point of the present invention:
(1) coal column anchor cable is to wearing reinforcing technique.The two ends of two-ended cables, in the both sides of coal column, can ensure anchorage reliability, can in new pick B tunnel, apply larger first anchor-hold, and an anchor cable can play the mechanical function of two anchor cables, strengthens anchoring effect;
(2) what coal pillar width, anchor cable length and anchor cable hole were long rationally determines.General desirable coal pillar width L=(0.8～1.2) M, M is head-room.Initial length L1=L-(100～the 400mm of anchor cable in the boring of coal column anchor cable), anchor cable boring length L 2=L+(100～400mm).
(3) anchor cable lengthens technology.Comprise anchor cable grafting technique, scalability anchor cable and the three kinds of schemes of flexible anchor cable of adopting.
The above; only for preferably detailed description of the invention of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (2)
1. gob side entry driving coal column anchor cable, to wearing a method for reinforcing, is characterized in that, comprises step:
Under upper curtate in crossheading to narrow coal column drilling, preset anchor cable is installed in boring, and on the rib of drilling one side successively sprayed mortar spray-up, fine-meshed screen is installed, steel mesh reinforcement and anchoring tray is installed, the tapered end of described anchor cable outer end is fixed on described anchoring tray;
After on lower curtate, crossheading has tunneled, in new pick tunnel, the preset anchor cable in described boring is lengthened, finally implement above-mentioned identical operation, complete anchoring work.
2. gob side entry driving coal column anchor cable according to claim 1, to wearing the method for reinforcing, is characterized in that, the lengthening of described preset anchor cable is implemented in new pick tunnel, adopts following any method:
After on lower curtate, crossheading has tunneled, by linkage, the leaning on of preset anchor cable that one section of new anchor cable is connected in the boring of coal column anchor cable newly dug Yi Ce one end, tunnel, and anchor cable is lengthened;
Preset anchor cable in the boring of coal column anchor cable adopts extension type anchor cable, after crossheading has tunneled on lower curtate, by new pick Yi Ce one end, tunnel, makes its lengthening by elongating anchor cable;
Preset anchor cable in the boring of coal column anchor cable adopts flexible anchor cable, first will after the doubling of anchor cable one end, in the boring of coal column anchor cable, install, after crossheading has tunneled on lower curtate, leaning on new pick Yi Ce one end, tunnel, more stretching the anchor cable of the doubling anchor cable that makes is being lengthened.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422128A (en) * | 2015-12-14 | 2016-03-23 | 山东科技大学 | Method for preventing goaf gas leakage in deep shaft gob-side entry driving |
| CN105626111A (en) * | 2015-12-25 | 2016-06-01 | 山东深博巷道支护技术有限公司 | Telescopic two-ended anchor cable for two-direction reinforcing of coal pillar |
| CN105971640A (en) * | 2016-07-08 | 2016-09-28 | 西安科技大学 | Strengthening method for gob-side entrydriving narrow coal pillar |
| CN106050282A (en) * | 2016-07-08 | 2016-10-26 | 西安科技大学 | Anchoring structure and reinforcing method of narrow coal pillar of gob-side entry retaining |
| CN106150535A (en) * | 2016-07-02 | 2016-11-23 | 河南理工大学 | A kind of strip-type wangeviry mining method technology offset method for protecting support |
| CN106884655A (en) * | 2017-01-10 | 2017-06-23 | 山东建筑大学 | A kind of two-way reinforcement means of gob side entry driving coal column |
| CN107060811A (en) * | 2017-06-20 | 2017-08-18 | 嘉兴学院 | The bracing means of thin coal pillar between a kind of tunnel |
| CN108590723A (en) * | 2018-05-24 | 2018-09-28 | 中煤能源研究院有限责任公司 | Gob side entry driving fender erosion control release is to drawing anchoring integral structure and construction method |
| CN109505639A (en) * | 2019-01-04 | 2019-03-22 | 山东科技大学 | A kind of gob side entry driving coal column hardened system and its application method |
| CN111088989A (en) * | 2019-12-12 | 2020-05-01 | 大同煤矿集团有限责任公司 | Gob-side entry driving surrounding rock control method for fully mechanized caving section of extra-thick coal seam |
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| CN101338679A (en) * | 2008-06-26 | 2009-01-07 | 王光平 | Deep well great section loose wall rock laneway support method |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422128A (en) * | 2015-12-14 | 2016-03-23 | 山东科技大学 | Method for preventing goaf gas leakage in deep shaft gob-side entry driving |
| CN105626111A (en) * | 2015-12-25 | 2016-06-01 | 山东深博巷道支护技术有限公司 | Telescopic two-ended anchor cable for two-direction reinforcing of coal pillar |
| CN105626111B (en) * | 2015-12-25 | 2018-02-23 | 山东深博巷道支护技术有限公司 | A kind of coal column two-way reinforcing concertina type two-ended cables |
| CN106150535A (en) * | 2016-07-02 | 2016-11-23 | 河南理工大学 | A kind of strip-type wangeviry mining method technology offset method for protecting support |
| CN105971640B (en) * | 2016-07-08 | 2018-08-03 | 西安科技大学 | A kind of reinforcement means of gob side entry driving thin coal pillar |
| CN106050282A (en) * | 2016-07-08 | 2016-10-26 | 西安科技大学 | Anchoring structure and reinforcing method of narrow coal pillar of gob-side entry retaining |
| CN106050282B (en) * | 2016-07-08 | 2018-08-03 | 西安科技大学 | A kind of anchor structure and reinforcement means of gob side entry retaining thin coal pillar |
| CN105971640A (en) * | 2016-07-08 | 2016-09-28 | 西安科技大学 | Strengthening method for gob-side entrydriving narrow coal pillar |
| CN106884655A (en) * | 2017-01-10 | 2017-06-23 | 山东建筑大学 | A kind of two-way reinforcement means of gob side entry driving coal column |
| CN106884655B (en) * | 2017-01-10 | 2019-02-22 | 山东建筑大学 | A kind of two-way reinforcement means of gob side entry driving coal column |
| CN107060811A (en) * | 2017-06-20 | 2017-08-18 | 嘉兴学院 | The bracing means of thin coal pillar between a kind of tunnel |
| CN108590723A (en) * | 2018-05-24 | 2018-09-28 | 中煤能源研究院有限责任公司 | Gob side entry driving fender erosion control release is to drawing anchoring integral structure and construction method |
| CN109505639A (en) * | 2019-01-04 | 2019-03-22 | 山东科技大学 | A kind of gob side entry driving coal column hardened system and its application method |
| CN109505639B (en) * | 2019-01-04 | 2020-03-31 | 山东科技大学 | Gob-side entry driving coal pillar reinforcing system and using method thereof |
| CN111088989A (en) * | 2019-12-12 | 2020-05-01 | 大同煤矿集团有限责任公司 | Gob-side entry driving surrounding rock control method for fully mechanized caving section of extra-thick coal seam |
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Application publication date: 20140702 |