CN102926774A - Bolting and grouting process for governing roadway floor heave - Google Patents
Bolting and grouting process for governing roadway floor heave Download PDFInfo
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- CN102926774A CN102926774A CN2012104722544A CN201210472254A CN102926774A CN 102926774 A CN102926774 A CN 102926774A CN 2012104722544 A CN2012104722544 A CN 2012104722544A CN 201210472254 A CN201210472254 A CN 201210472254A CN 102926774 A CN102926774 A CN 102926774A
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Abstract
The invention discloses a bolting and grouting process for governing a roadway floor heave. The bolting and grouting process comprises the following steps: constructing on a lane base plate to form a shallow part grouting hole with the depth of 0.6-1.2m; after the construction of the shallow part grouting part is finished, inserting a grouting capsule pipe and starting grouting; when the slurry return phenomenon occurs on the lane base plate or the grouting pressure reaches 1MPa, stopping grouting; after the slurry in the shallow part grouting hole is solidified, constructing on the lane base plate to form a medium-depth part grouting hole with the depth of 2.5-3.5m; after the construction of the medium-depth part grouting hole is finished, inserting a grouting capsule pipe and starting grouting; when the grouting pressure reaches 2.0-3.0MPa, stabilizing the pressure for 5 minutes and stopping grouting; after slurry in the medium-depth part grouting hole is solidified, constructing on the lane base plate to form a deep part drill hole with the depth of over 5m and carrying out deep part drilling and high-pressure grouting by selecting a hollow anchor cable; when the grouting pressure reaches 3.0-5.0MPa, stabilizing the pressure for 5 minutes and stopping grouting; and repeating the steps until the solidifying construction for the lane base plate is finished. The bolting and grouting process disclosed by the invention has the advantages that the simplicity and easiness for construction are realized; the links of sealing holes and constructing terrace are omitted; the construction procedures are simplified; the grouting efficiency is increased; and the favorable effect of controlling the floor heave is obtained.
Description
Technical field
Distension is administered at the bottom of the invention belongs to the improvement of distension at the bottom of the coal mine roadway or other tunnels, particularly relates to a kind of notes anchor technique of administering for floor lift in gallery.
Background technology
In recent years, along with the coal pit mining degree of depth continues to increase, the large deformation of soft-rock tunnel, the engineering problem of difficult supporting are on the rise, and are one of soft-rock tunnel large deformation principal characters at the highland press strip spare distension of going to the bottom; And the destruction of roadway floor directly affects the stable of tunnel side, top.In the situation that not supporting of base plate approximately has 2/3～3/4th in the roof to floor convergence of tunnel, caused by end distension; End distension causes drift section to dwindle, and hinders transportation and personnel walking, hinders and ventilates, and scrap in the whole tunnel of causing that end distension is serious, affects production and the safety in mine.Therefore, many mines are had to drop into a large amount of human and material resources and are administered floor lift in gallery.Yet, because the complexity of roadway surrounding rock character, ambient stress causes taking measures well solving the floor lift in gallery problem.
CN201010204599.2 discloses the method for a kind of soft rock roadway grouting and full-length prestress baseboard anchor cable comprehensive support, this complicated construction technique, constructional difficulties.Because the superficial part rock crushing, anchor cable very easily produces Relaxation of prestressing.
CN201010147471.7 discloses a kind of method for reinforcing roadway floor by grouting, but control end distension poor effect.
Summary of the invention
The technical problem to be solved in the present invention provides and a kind ofly is simple and easy to construct, effective, construction cost is low is used for the notes anchor technique that floor lift in gallery is administered.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of notes anchor technique for floor lift in gallery improvement may further comprise the steps:
(1) at the dark superficial part injected hole of roadway floor construction 0.6～1.2m, after the construction of superficial part injected hole is finished, plug the slip casting capsule tube, beginning slip casting stops slip casting when the slurry phenomenon appears returning in roadway floor; Perhaps when grouting pressure reached 1.0MPa, voltage stabilizing 5min stopped slip casting;
(2) behind the superficial part injected hole once grouting, the slip casting capsule tube is plugged in complement boring between first time superficial part injected hole, carries out the shallow bore hole secondary grouting; During the shallow bore hole secondary grouting, base plate slurry occurs returning and stops a period of time and annotate, by repeatedly slip-casting, does not starch again slip casting to final pressure 1.0MPa until returning does not appear in base plate, when treating grouting pressure voltage stabilizing 5min, finishes slip casting;
(3) slip casting of superficial part injected hole finishes and when slurry consolidation after, at the dark middle deep injected hole of roadway floor construction 2.5～3.5m, after middle deep injected hole is constructed and finished, plug the slip casting capsule tube, beginning slip casting, when grouting pressure reached 2.0-3.0MPa, voltage stabilizing 5min stopped slip casting;
(4) after the slurry consolidation of medium-length hole slip casting, at construct deep drill more than the dark 5m of roadway floor, select the hollow anchor cable to carry out the deep drill high-pressure slip-casting, when grouting pressure reached 3.0 ~ 5.0MPa, voltage stabilizing 5min stopped slip casting; After slurry consolidation, the locking anchor cable;
(5) repeat above-mentioned steps, until complete to the roadway floor strengthening construction.
Notes anchor technique for floor lift in gallery improvement of the present invention, wherein said slip casting capsule tube comprises rubber tube, safe spool, spring, inlet pipe, outlet pipe, the upper end of rubber tube is pressed between inlet pipe and the upper binding head, the lower end of rubber tube is pressed between outlet pipe and the lower union joint, the grout outlet place mounting spring head part of outlet pipe lower end, the bottom of outlet pipe is provided with pulp-supplying chamber, safe spool is positioned at the pulp-supplying chamber inner top, the two ends of spring withstand between the bottom surface and spring head part of safe spool, and safe spool is lived the inlet seal of pulp-supplying chamber under the pressure of spring.
Notes anchor technique for floor lift in gallery improvement of the present invention, wherein in the step (3), when middle deep injected hole is constructed, select the drill bit of different-diameter, adopt first the bit bore of minor diameter, adopt again the reaming of major diameter drill bit, and then adopt the drill bit of minor diameter to continue boring, gradation progressively enlarges boring aperture, successively pore-forming.
Notes anchor technique for floor lift in gallery improvement of the present invention, wherein in the step (4), during the deep drill construction, select the drill bit of different-diameter, adopt first the bit bore of minor diameter, adopt again the reaming of major diameter drill bit, and then adopt the drill bit of minor diameter to continue boring, gradation progressively enlarges boring aperture, successively pore-forming.
Notes anchor technique for floor lift in gallery improvement of the present invention, wherein in the step (1), array pitch is 3.2～4.8m between described superficial part injected hole.
Notes anchor technique for floor lift in gallery improvement of the present invention, wherein in step (1) and the step (2), the slurry water gray scale was regulated between 0.75: 1～1.25: 1.
Notes anchor technique for floor lift in gallery improvement of the present invention, in the wherein said step (3), array pitch is 2.4～3.2m between the injected hole of middle deep.
Notes anchor technique for floor lift in gallery improvement of the present invention, in the wherein said step (3), the slurry water gray scale was regulated between 1.25: 1～2: 1.
Notes anchor technique for floor lift in gallery improvement of the present invention, in the wherein said step (4), array pitch is 2.4m～3.2m between deep drill.
Notes anchor technique of administering for floor lift in gallery of the present invention, in the wherein said step (4), during the hollow anchor rope grouting, anchoring anchor cable termination at first, secondly stretch-draw anchor applies prestressing force, then slip casting, the slurry water gray scale was regulated between 1.25: 1～2: 1.
The notes anchor technique that the present invention is used for floor lift in gallery improvement is simple and easy to construction, select the slip casting of slip casting capsule tube, be provided with safety valve in the slip casting capsule tube, opening pressure of safety valve can be regulated, and has save sealing of hole and construction terrace link, simplified working procedure, improved slip casting efficient, effective, and the slip casting capsule tube can be reused, save engineering cost, reduced workman's labour intensity.
Below in conjunction with accompanying drawing notes anchor technique of administering for floor lift in gallery of the present invention is described further.
Description of drawings
Fig. 1 is the structural representation that the present invention is used for the notes anchor technique tunnel of floor lift in gallery improvement;
Fig. 2 is the structural representation that the present invention is used for the notes anchor technique slip casting capsule tube of floor lift in gallery improvement;
Fig. 3 is the use state diagram that the present invention is used for the notes anchor technique slip casting capsule tube slip casting process of floor lift in gallery improvement.
The specific embodiment
As shown in Figure 1, the present invention is used for the notes anchor technique that floor lift in gallery is administered, and may further comprise the steps:
(1) the dark superficial part injected hole 2 of 1 construction of bottom plates, 0.6～1.2m in the tunnel, 2 array pitch of superficial part injected hole are 3.2～4.8m, after 2 constructions of superficial part injected hole are finished, plug the slip casting capsule tube, adopt grouting pump to begin slip casting, the slurry water gray scale was regulated between 0.75: 1～1.25: 1, stopped slip casting when the slurry phenomenon appears returning in roadway floor; Perhaps when grouting pump pressure reaches 1.0MPa, stop slip casting about voltage stabilizing 5min.
As shown in Figure 2, the notes anchor technique slip casting capsule tube that the present invention is used for floor lift in gallery improvement comprises rubber tube 6, safe spool 7, spring 8, inlet pipe 9, outlet pipe 10, the upper end of rubber tube 6 is pressed between inlet pipe 9 and the upper binding head 11, the lower end of rubber tube 6 is pressed between outlet pipe 10 and the lower union joint 12, the grout outlet place mounting spring head part 13 of outlet pipe 10 lower ends, the bottom of outlet pipe 10 is provided with pulp-supplying chamber 14, safe spool 7 is positioned at pulp-supplying chamber 14 inner tops, the two ends of spring 8 withstand between the bottom surface and spring head part 13 of safe spool 7, and safe spool 7 is lived the inlet seal of pulp-supplying chamber 14 under the pressure of spring 8.
(2) behind superficial part injected hole 2 once groutings, in 2 complement borings of the superficial part injected hole first time, plug the slip casting capsule tube, adopt grouting pump to carry out the shallow bore hole secondary grouting; The slurry water gray scale was regulated between 0.75: 1～1.25: 1, and during the shallow bore hole secondary grouting, base plate slurry occurs returning and stops a period of time and annotate, pass through repeatedly slip-casting, do not starch again slip casting to final pressure 1.0MPa until returning does not appear in base plate, and during the grouting pump voltage stabilizing 5min left and right sides, can finish slip casting.
(3) after the 2 slip casting end of superficial part injected hole and the slurry consolidation, at the dark middle deep injected hole 3 of roadway floor construction 2.5～3.5m, injected hole 3 array pitch in middle deep are 2.4～3.2m, during 3 construction of middle deep injected hole, select the drill bit of different-diameter, adopt first the bit bore of minor diameter, adopt again the reaming of major diameter drill bit, and then adopt the drill bit of minor diameter to continue boring, gradation progressively enlarges boring aperture, pore-forming is arranged powder pressure thereby alleviate boring successively, is convenient to the discharge of coal petrography break flour.After injected hole 3 constructions in middle deep are finished, plug the slip casting capsule tube, adopt grouting pump to begin slip casting, the slurry water gray scale was regulated between 1.25: 1～2: 1, when grouting pressure reaches 2.0-3.0MPa, stopped slip casting about voltage stabilizing 5min.
(4) after the slurry consolidation of medium-length hole slip casting 3, at construct deep drill 4 more than the dark 5m of roadway floor, 4 array pitch of deep drill are 2.4m～3.2m, during deep drill 4 construction, select the drill bit of different-diameter, adopt first the bit bore of minor diameter, adopt again the reaming of major diameter drill bit, and then adopt the drill bit of minor diameter to continue boring, gradation progressively enlarges boring aperture, pore-forming is arranged powder pressure thereby alleviate boring successively, is convenient to the discharge of coal petrography break flour.Select hollow anchor cable 5 to carry out the deep drill high-pressure slip-casting.During the hollow anchor rope grouting, anchoring anchor cable termination at first, secondly stretch-draw anchor applies prestressing force, then slip casting, the slurry water gray scale was regulated between 1.25: 1～2: 1, when grouting pressure reaches 3.0 ~ 5.0MPa, stopped slip casting about voltage stabilizing 5min; After slurry consolidation, the locking anchor cable.
(5) repeat above-mentioned steps 1-4, until complete to the roadway floor strengthening construction.
The present invention is used for the notes anchor technique that floor lift in gallery is administered, be provided with safety valve in the slip casting capsule tube, opening pressure of safety valve can be regulated, and during slip casting, just can carry out slip casting after pressure reaches opening pressure of safety valve in the slip casting capsule tube, and under the grouting pressure effect, as shown in Figure 3, rubber tube 6 expansion jam-packeds boring in the boring, boring outer rubber tube swelling forms spheroid 15 closed orifices, in this dual mode effect effectively shutoff boring of milk capsule pipe of making a bet, reach the purpose of grouting.
The present invention is used for the notes anchor technique that floor lift in gallery is administered, and at first adopts superficial part injected hole low pressure gradation slip casting, and weak broken rock stratum, fixed roadway floor top layer forms the grouting layer, thereby need not the terrace of constructing, deep injected hole high-pressure slip-casting in then adopting; Adopt at last the hollow anchor cable to carry out the deep drill high-pressure slip-casting.Adopt the slip casting capsule tube to carry out superficial part injected hole, the injected hole slip casting of middle deep, save construction terrace and injection hole sealing link, simplified working procedure, improved slip casting efficient.Owing to without sealing of hole, after the slip casting, the slip casting capsule tube can be taken out from the hole, be left next time and use, saved construction cost.By adjusting the opening pressure of slip casting capsule tube internal safety valve, selected slip casting capsule tube can adapt to the requirement of different grouting pressures, is applicable to the jacking of floor of high stress and soft rock mine roadway.
The present invention is used for the notes anchor technique that floor lift in gallery is administered, and when carrying out middle deep injected hole, deep drill construction, selects different-diameter drill bit gradation pore-forming, row's powder difficult problem when effectively having lowered the base plate drilling construction.
Above-described embodiment is described preferred embodiment of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that those of ordinary skills make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (10)
1. one kind is used for the notes anchor technique that floor lift in gallery is administered, and may further comprise the steps:
(1) at the dark superficial part injected hole of roadway floor construction 0.6～1.2m, after the construction of superficial part injected hole is finished, plug the slip casting capsule tube, beginning slip casting stops slip casting when the slurry phenomenon appears returning in roadway floor; Perhaps when grouting pressure reached 1.0MPa, voltage stabilizing 5min stopped slip casting;
(2) behind the superficial part injected hole once grouting, the slip casting capsule tube is plugged in complement boring between first time superficial part injected hole, carries out the shallow bore hole secondary grouting; During the shallow bore hole secondary grouting, base plate slurry occurs returning and stops a period of time and annotate, by repeatedly slip-casting, does not starch again slip casting to final pressure 1.0MPa until returning does not appear in base plate, when treating grouting pressure voltage stabilizing 5min, finishes slip casting;
(3) slip casting of superficial part injected hole finishes and when slurry consolidation after, at the dark middle deep injected hole of roadway floor construction 2.5～3.5m, after middle deep injected hole is constructed and finished, plug the slip casting capsule tube, beginning slip casting, when grouting pressure reached 2.0-3.0MPa, voltage stabilizing 5min stopped slip casting;
(4) after the slurry consolidation of medium-length hole slip casting, at construct deep drill more than the dark 5m of roadway floor, select the hollow anchor cable to carry out the deep drill high-pressure slip-casting, when grouting pressure reached 3.0 ~ 5.0MPa, voltage stabilizing 5min stopped slip casting; After slurry consolidation, the locking anchor cable;
(5) repeat above-mentioned steps, until complete to the roadway floor strengthening construction.
2. notes anchor technique of administering for floor lift in gallery according to claim 1, it is characterized in that: described slip casting capsule tube comprises rubber tube, safe spool, spring, inlet pipe, outlet pipe, the upper end of rubber tube is pressed between inlet pipe and the upper binding head, the lower end of rubber tube is pressed between outlet pipe and the lower union joint, the grout outlet place mounting spring head part of outlet pipe lower end, the bottom of outlet pipe is provided with pulp-supplying chamber, safe spool is positioned at the pulp-supplying chamber inner top, the two ends of spring withstand between the bottom surface and spring head part of safe spool, and safe spool is lived the inlet seal of pulp-supplying chamber under the pressure of spring.
3. notes anchor technique of administering for floor lift in gallery according to claim 2, it is characterized in that: in the step (3), when middle deep injected hole is constructed, select the drill bit of different-diameter, adopt first the bit bore of minor diameter, adopt again the reaming of major diameter drill bit, and then adopt the drill bit of minor diameter to continue boring, gradation progressively enlarges boring aperture, successively pore-forming.
4. notes anchor technique of administering for floor lift in gallery according to claim 3, it is characterized in that: in the step (4), during the deep drill construction, select the drill bit of different-diameter, adopt first the bit bore of minor diameter, adopt again the reaming of major diameter drill bit, and then adopt the drill bit of minor diameter to continue boring, gradation progressively enlarges boring aperture, successively pore-forming.
5. notes anchor technique of administering for floor lift in gallery according to claim 4, it is characterized in that: in the step (1), array pitch is 3.2～4.8m between described superficial part injected hole.
6. notes anchor technique of administering for floor lift in gallery according to claim 5, it is characterized in that: in step (1) and the step (2), the slurry water gray scale was regulated between 0.75: 1～1.25: 1.
7. notes anchor technique of administering for floor lift in gallery according to claim 6, it is characterized in that: in the described step (3), array pitch is 2.4～3.2m between the injected hole of middle deep.
8. notes anchor technique of administering for floor lift in gallery according to claim 7, it is characterized in that: in the described step (3), the slurry water gray scale was regulated between 1.25: 1～2: 1.
9. notes anchor technique of administering for floor lift in gallery according to claim 8, it is characterized in that: in the described step (4), array pitch is 2.4m～3.2m between deep drill.
10. the notes anchor technique for floor lift in gallery improvement according to claim 9 is characterized in that: in the described step (4), during the hollow anchor rope grouting, anchoring anchor cable termination at first, secondly stretch-draw anchor applies prestressing force, then slip casting, and the slurry water gray scale was regulated between 1.25: 1～2: 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210472254.4A CN102926774B (en) | 2012-11-20 | 2012-11-20 | Bolting and grouting process for governing roadway floor heave |
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| CN201210472254.4A CN102926774B (en) | 2012-11-20 | 2012-11-20 | Bolting and grouting process for governing roadway floor heave |
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| CN102926774A true CN102926774A (en) | 2013-02-13 |
| CN102926774B CN102926774B (en) | 2015-07-08 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756689A (en) * | 2016-04-21 | 2016-07-13 | 淮南矿业(集团)有限责任公司 | Roadway floor reinforcing system and construction method thereof |
| CN107963841A (en) * | 2017-11-21 | 2018-04-27 | 山东科技大学 | A kind of swelling soft-rock roadway grouting material |
| CN108547648A (en) * | 2018-04-02 | 2018-09-18 | 安徽理工大学 | The buffering energy-absorbing supporting construction and its construction method of a kind of deep tunnel bottom distension control |
| CN108590739A (en) * | 2018-04-11 | 2018-09-28 | 中国平煤神马能源化工集团有限责任公司 | A kind of prominent tunnel regionality energy divides source to control anti-burst method |
| CN110344411A (en) * | 2019-07-23 | 2019-10-18 | 安玉霞 | A kind of construction underground support anchoring device |
| CN113482681A (en) * | 2021-08-17 | 2021-10-08 | 华能铜川照金煤电有限公司西川煤矿分公司 | Device and method for reinforcing prestress grouting anchor cable of belt main roadway bottom plate |
| CN113958324A (en) * | 2021-10-19 | 2022-01-21 | 金川集团股份有限公司 | Method for drilling deep hole on grouting reinforced roadway floor |
| CN114673527A (en) * | 2022-04-20 | 2022-06-28 | 中国科学院武汉岩土力学研究所 | Method for reinforcing broken surrounding rock of progressive roadway and tunnel |
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| US4372708A (en) * | 1980-08-28 | 1983-02-08 | General Electric Company | Resin capsule and method for grouting anchor elements in holes of various lengths |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756689A (en) * | 2016-04-21 | 2016-07-13 | 淮南矿业(集团)有限责任公司 | Roadway floor reinforcing system and construction method thereof |
| CN107963841A (en) * | 2017-11-21 | 2018-04-27 | 山东科技大学 | A kind of swelling soft-rock roadway grouting material |
| CN107963841B (en) * | 2017-11-21 | 2020-07-31 | 山东科技大学 | Expansive soft rock roadway grouting material |
| CN108547648A (en) * | 2018-04-02 | 2018-09-18 | 安徽理工大学 | The buffering energy-absorbing supporting construction and its construction method of a kind of deep tunnel bottom distension control |
| CN108590739A (en) * | 2018-04-11 | 2018-09-28 | 中国平煤神马能源化工集团有限责任公司 | A kind of prominent tunnel regionality energy divides source to control anti-burst method |
| CN110344411A (en) * | 2019-07-23 | 2019-10-18 | 安玉霞 | A kind of construction underground support anchoring device |
| CN113482681A (en) * | 2021-08-17 | 2021-10-08 | 华能铜川照金煤电有限公司西川煤矿分公司 | Device and method for reinforcing prestress grouting anchor cable of belt main roadway bottom plate |
| CN113958324A (en) * | 2021-10-19 | 2022-01-21 | 金川集团股份有限公司 | Method for drilling deep hole on grouting reinforced roadway floor |
| CN113958324B (en) * | 2021-10-19 | 2024-05-07 | 金川集团股份有限公司 | Method for grouting and reinforcing deep drilling of roadway bottom plate |
| CN114673527A (en) * | 2022-04-20 | 2022-06-28 | 中国科学院武汉岩土力学研究所 | Method for reinforcing broken surrounding rock of progressive roadway and tunnel |
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