CN205422772U - To drawing formula large deformation slip casting stock - Google Patents
To drawing formula large deformation slip casting stock Download PDFInfo
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- CN205422772U CN205422772U CN201620197887.2U CN201620197887U CN205422772U CN 205422772 U CN205422772 U CN 205422772U CN 201620197887 U CN201620197887 U CN 201620197887U CN 205422772 U CN205422772 U CN 205422772U
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- large deformation
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Abstract
The utility model discloses a to drawing formula large deformation slip casting stock, it is that the spacer sleeve has two rubber only to starch the valve on the intermediate draw bar, is equipped with the injected hole on the valve is only starched to one of them rubber, there are the same large deformation device of structure and supporting tray, nut at intermediate draw bar both ends symmetric connection, the large deformation device include that one end is the back cover in band -pass hole, the other end is the open end sleeve, the compression spring that excels in, fastening bolt and connecting piece, open end and connecting piece and connecting piece and intermediate draw bar all are threaded connection, be equipped with the compression spring that excels in in the sleeve, the thread head exposed from the through -hole of sleeve back cover after fastening bolt passed the compression spring that excels in, the mode of strutting of slip casting in the middle of forming the fender when utilizing this kind of anchor bolt support, both ends pretension had both adapted to the large deformation of coal column, had guaranteed the safety and stability of coal column again.
Description
Technical field
This utility model relates to stope of coal mines Roadway Support Technology, particularly relates to gob side entry driving fender support technology.
Background technology
In progress of coal mining, gob side entry driving has good technical advantage and economic benefit, the most effectively alleviates mine working face and takes over anxiety but also significantly improve the coal resources rate of extraction, colliery realizes safe efficient modernization exploitation significant.But developed by overburden structure and adopt strong disturbance and affected, gob side entry driving fender destroys seriously, deformation is big, poor stability, being gradually lowered along with tunnel increases coal body load-carrying properties service time, its supporting difficult problem includes: 1. fender transversely deforming amount is big, and wall caving happens occasionally；2. fender plastic zone scope is big, and internal sabotage is serious；3. common bolt prop length is short, and supporting scope is little, the disrumpent feelings inefficacy of the body of rod easily occur.
For current gob side entry driving fender support issues, the different types of method for protecting support of domestic scholars utility model, owing to fender width is about 3～6m, major part uses anchor pole, Application of Combined Support with Anchor, a kind of as disclosed in Chinese patent application CN104533482A improves gob side entry driving stability of coal pillar Trinity coupling supporting control method disclosed in the reinforcement means of gob side entry driving fender stability, Chinese patent application CN103244122B；Or only with cable bolting, as disclosed in Chinese patent application CN103899342A, gob side entry driving coal column anchor cable is to wearing reinforcement means.But these method for protecting support all do not account for the large deformation feature of gob side entry driving fender, make support system and coal column deformation, causing the disrumpent feelings inefficacy of supporting construction, finally there is overall destruction in coal column, therefore gob side entry driving fender suspension device and method need improvement and development badly.
Utility model content
The deficiency of existence during for overcoming existing grouted anchor bar that gob side entry driving fender carries out supporting, this utility model provides a kind of to pull-type large deformation grouted anchor bar.
For reaching above-mentioned purpose, this utility model adopts the technical scheme that:
A kind of to pull-type large deformation grouted anchor bar, it is characterised in that it includes an intermediate draw bar, is jacketed with two rubber grouting stop-valves on intermediate draw bar, and a rubber grouting stop-valve is provided with injected hole wherein；The identical large deformation device of structure and supporting pallet, nut it is symmetrically connected with at intermediate draw bar two ends；Wherein: described large deformation device includes sleeve, high-strength compression spring, fastening bolt and connector；Described sleeve one end be the back cover of band through hole, the other end be opening, opening is screwed on the external screw thread of connector by female thread, and the other end of connector is screwed on the external screw thread of intermediate draw bar end by female thread；Expose from the through hole of sleeve back cover through high-strength compression spring rear thread head built with high-strength compression spring, fastening bolt at sleeve, at bared end set top tray and nut during use.
Utilize the method that pull-type large deformation grouted anchor bar is carried out supporting to gob side entry driving fender of the present utility model, comprise the following steps:
The first step, when tunneling out under upper curtate after crossheading in coal seam, drilling on the rib of pre-future small coal pillar, drilling depth is the width value of pre-future small coal pillar, the trestle column of boring according to design require arrange；
After second step, boring, pull-type anchor pole will be charged stepwise in boring, and make the rubber grouting stop-valve being provided with injected hole near aperture, it is ensured that the spacing that two rubber grouting stop-valve intervals are certain；
3rd step, Grouting Pipe is inserted in the injected hole of rubber grouting stop-valve from boring, by grouting device, region between two rubber grouting stop-valves is carried out slip casting, form the middle slip casting district along empty fender；
4th step, after grout cures, the thread head of the fastening bolt of orifice end is installed pallet and nut, fastening nut, now in orifice end sleeve, high strong spring is compressed certain length, until reaching Prestress design requirement, so that the rib of crossheading side is fastened under the upper curtate of pre-future small coal pillar；
5th step, after on lower curtate, crossheading has tunneled, the fastening bolt end of the large deformation device being in bottom, hole is exposed from rib, pallet and nut are installed after exposing on the thread head of fastening bolt, fastening nut applies pretightning force, the rib of fender opposite side is fastened, so that fender defines the coal column body being suitable for large deformation of " middle slip casting, two ends pretension ".
The beneficial effects of the utility model:
This utility model solves the technical barrier utilizing suspension roof support gob side entry driving fender, propose " middle slip casting, two ends pretension " to pull-type anchor rod support method, achieve and once anchor, the support technology of twice installation, anchor pole is to drawing support system and coal column large deformation coordinative role, compensate for existing suspension roof support scope little, shortcoming by the easy disrumpent feelings inefficacy of mining influence, in the middle of anchor pole, slip casting district substantially increases the bearing strength at fender core position simultaneously, reduce transversely deforming amount, under the effect of high-strength compression spring, fastening bolt can suitably pull out, offer convenience for the anchoring construction of crossheading on lower curtate, simple to operate, practical, anchor bar suspension device of the present utility model and method had both adapted to the large deformation of coal column, in turn ensure that the safety and stability of coal column, there is stronger popularization and using value.
Accompanying drawing explanation
Fig. 1 is to pull-type large deformation grouted anchor bar organigram；
Fig. 2 is the bush structure schematic diagram to pull-type large deformation grouted anchor bar；
Fig. 3 is the connecting piece structure schematic diagram to pull-type large deformation grouted anchor bar；
Fig. 4-Fig. 7 is the method step schematic diagram utilizing and gob side entry driving fender being carried out supporting by pull-type large deformation grouted anchor bar.
In figure, 1-coal seam, crossheading under 2-upper curtate, 3-holes, 4-is to pull-type anchor pole, crossheading on 5-lower curtate, 6-Grouting Pipe, 7-cement grout, 8-fender body, 9-nut, 10-pallet, 11-injected hole, 12-fastening bolt, 13-sleeve, 14-connector, 15-intermediate draw bar, the high-strength compression spring of 16-, 17-rubber grouting stop-valve, 18-through hole, a-pre-future small coal pillar width value.
Detailed description of the invention
As shown in Figure 1, a kind of for gob side entry driving fender to pull-type large deformation grouted anchor bar, two rubber grouting stop-valves 17 that it by intermediate draw bar 15, is enclosed within intermediate draw bar 15, the large deformation device being symmetrically connected to intermediate draw bar 15 two ends and supporting nut 9 and pallet 10 form；
Described large deformation device includes sleeve 13, high-strength compression spring 16, fastening bolt 12 and connector 14；As in figure 2 it is shown, above-mentioned sleeve 13 bottom is provided with the back cover of band through hole 18, opening is provided with female thread；As it is shown on figure 3, above-mentioned connector 14 one end is provided with the external screw thread being connected with sleeve 13 opening, the other end is provided with the female thread being connected with intermediate draw bar 15；Above-mentioned high-strength compression spring 16 loads in sleeve 13, then fastening bolt 12 is loaded in high-strength compression spring 16, makes the thread head of fastening bolt 12 expose from the through hole 18 of sleeve back cover, and then connector 14 is threaded in sleeve 13 opening；On intermediate draw bar 15 the most across a certain distance, a rubber grouting stop-valve 17 is provided with injected hole 11 to above-mentioned rubber grouting stop-valve 17 wherein.
Utilize the method that pull-type large deformation grouted anchor bar is carried out supporting to gob side entry driving fender, comprise the following steps:
The first step, when tunneling out under upper curtate after crossheading 2 in coal seam 1, drilling 3 on the rib of pre-future small coal pillar, the width a value that 3 degree of depth are pre-future small coal pillar of holing；The trestle column of boring 3 requires to arrange according to design；As shown in Figure 4；
After second step, boring, pull-type anchor pole 4 will be loaded in boring 3, and make that rubber grouting stop-valve 17 being provided with injected hole 11 near aperture, it is ensured that the spacing that two rubber grouting stop-valves are certain, as shown in Figure 5；
3rd step, Grouting Pipe 6 is inserted in the injected hole 11 of rubber grouting stop-valve 17 from boring 3, carries out region between two rubber grouting stop-valves 17 injecting cement grout 7 by grouting device, form the middle slip casting district along empty fender, as shown in Figure 6；
4th step, until cement grout 7 solidify after, the thread head of the fastening bolt 12 of orifice end is installed pallet 10 and nut 9, fastening nut 9, now in the sleeve 13 of orifice end, high strong spring 16 is compressed certain length, until reaching Prestress design requirement, so that the rib of crossheading 2 side is fastened under the upper curtate of pre-future small coal pillar；
5th step, after crossheading on lower curtate 5 has tunneled, fastening bolt 12 end of the large deformation device being in bottom, hole is exposed from rib, pallet 10 and nut 9 are installed after exposing on thread head, fastening nut 9 applies pretightning force, the rib of fender opposite side is fastened, so that fender defines the coal column body 8 being suitable for large deformation of " middle slip casting, two ends pretension ", as shown in Figure 7.
Claims (1)
1. one kind to pull-type large deformation grouted anchor bar, it is characterised in that it includes an intermediate draw bar, is jacketed with two rubber grouting stop-valves on intermediate draw bar, and a rubber grouting stop-valve is provided with injected hole wherein；The identical large deformation device of structure and supporting pallet, nut it is symmetrically connected with at intermediate draw bar two ends；Wherein: described large deformation device includes sleeve, high-strength compression spring, fastening bolt and connector；Described sleeve one end be the back cover of band through hole, the other end be opening, opening is screwed on the external screw thread of connector by female thread, and the other end of connector is screwed on the external screw thread of intermediate draw bar end by female thread；Expose from the through hole of sleeve back cover through high-strength compression spring rear thread head built with high-strength compression spring, fastening bolt at sleeve, at bared end set top tray and nut during use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620197887.2U CN205422772U (en) | 2016-03-15 | 2016-03-15 | To drawing formula large deformation slip casting stock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620197887.2U CN205422772U (en) | 2016-03-15 | 2016-03-15 | To drawing formula large deformation slip casting stock |
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| CN205422772U true CN205422772U (en) | 2016-08-03 |
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| CN201620197887.2U Active CN205422772U (en) | 2016-03-15 | 2016-03-15 | To drawing formula large deformation slip casting stock |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804776A (en) * | 2016-03-15 | 2016-07-27 | 山东科技大学 | Opposite pulling type anchor rods for gob-side entrydriving small coal pillar and support method thereof |
| CN107975039A (en) * | 2017-10-31 | 2018-05-01 | 中国水利水电科学研究院 | A kind of adjustable anchoring body anchor force dead load device of stretching force |
| CN109736865A (en) * | 2019-03-19 | 2019-05-10 | 河南理工大学 | A kind of gob side entry driving coal column dowel structure and its assembling and field installation process |
| CN113882884A (en) * | 2021-10-29 | 2022-01-04 | 国能神东煤炭集团有限责任公司 | Grouting anchor rod device for reinforcing gob-side entry driving narrow coal pillar |
-
2016
- 2016-03-15 CN CN201620197887.2U patent/CN205422772U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804776A (en) * | 2016-03-15 | 2016-07-27 | 山东科技大学 | Opposite pulling type anchor rods for gob-side entrydriving small coal pillar and support method thereof |
| CN105804776B (en) * | 2016-03-15 | 2017-11-10 | 山东科技大学 | For gob side entry driving fender to pull-type anchor pole and its method for protecting support |
| CN107975039A (en) * | 2017-10-31 | 2018-05-01 | 中国水利水电科学研究院 | A kind of adjustable anchoring body anchor force dead load device of stretching force |
| CN109736865A (en) * | 2019-03-19 | 2019-05-10 | 河南理工大学 | A kind of gob side entry driving coal column dowel structure and its assembling and field installation process |
| CN109736865B (en) * | 2019-03-19 | 2024-02-06 | 河南理工大学 | Gob-side entry driving coal pillar anchor bar structure and assembly and field installation method thereof |
| CN113882884A (en) * | 2021-10-29 | 2022-01-04 | 国能神东煤炭集团有限责任公司 | Grouting anchor rod device for reinforcing gob-side entry driving narrow coal pillar |
| CN113882884B (en) * | 2021-10-29 | 2023-08-08 | 国能神东煤炭集团有限责任公司 | Grouting anchor rod device for reinforcing gob-side entry driving narrow coal pillar |
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