CN104481556A - Method for treating floor heave of inclined tunnel in coal mine - Google Patents
Method for treating floor heave of inclined tunnel in coal mine Download PDFInfo
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- CN104481556A CN104481556A CN201410690007.0A CN201410690007A CN104481556A CN 104481556 A CN104481556 A CN 104481556A CN 201410690007 A CN201410690007 A CN 201410690007A CN 104481556 A CN104481556 A CN 104481556A
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- grouting
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- injected
- grout
- grout hole
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000003245 coal Substances 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000011440 grout Substances 0.000 claims description 66
- 238000007569 slipcasting Methods 0.000 claims description 32
- 239000008267 milk Substances 0.000 claims description 16
- 210000004080 milk Anatomy 0.000 claims description 16
- 235000013336 milk Nutrition 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 13
- 230000002209 hydrophobic effect Effects 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 6
- 210000004911 serous fluid Anatomy 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 24
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 208000017667 Chronic Disease Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention provides a method for treating the floor heave of an inclined tunnel in a coal mine, which comprises the following steps: (a) water blocking: drill a plurality of grouting holes in the floor strata of an upper horizontal tunnel close to the upper end of the inclined tunnel; then carry out grouting to the grouting holes, and carry out drilling and grouting twice separately; (b) water draining: carry out water draining after the water blocking process in step (a) is finished, and the time for water draining is 24 hours; (c) bottom grouting: drill a row of bottom grouting holes in the floor of an end part of a lower horizontal tunnel at the lower end of the inclined tunnel and carry out grouting to the bottom grouting holes, grouting sequence: start in the middle and then on two sides, the grouting pressure is 2 to 3 MPa, grouting time: keep 5 to 15 minutes after the grouting pressure is achieved; and (d) grouting: arrange a plurality of grouting holes at the upper end of the inclined tunnel, and grouting can be carried out on the grouting holes after the bottom grouting in step (c) is carried out for 24 hours. The method has a simple process and a low cost, and can effectively treat the floor heave of the inclined tunnel in the coal mine.
Description
Technical field
The present invention relates to the administering method of distension at the bottom of a kind of coal mine sloping lane.
Background technology
For a long time, end distension is a large chronic disease of Soft Rock Drifts At Coal, why is referred to as chronic disease, is that only after it heaves to a certain extent, it dug out with pneumatic pick, this measure is called planted agent because people feel simply helpless to it always.End distension causes track torsional deformation on the one hand, height rises and falls, and causes overturn accident, causes tunnel to stop operation; On the other hand, while end distension occurs, initiation two moves in helping, and country rock monocoque structure supporting capacity significantly reduces, and surrouding rock deformation is serious.Though planted agent can alleviate needing of a period of time, planted agent's engineering not only workload is very large, and engineering difficulty is also very large, and often engineering progress is slow, has a strong impact on production.
The reason of end distension has two usually, and first ground pressure, ground pressure is larger, and the concentrated stress value of roadway surrounding rock is larger, and the extrinsic motive of roadway deformation is larger.Second reason is " water ", and in the downward certain limit of gallery base plate, (within the scope of usual 500 ~ 4500mm) is containing a large amount of " free water ", and the existence of water causes the rock in the certain limit of base plate bottom to be soaked in water throughout the year.The tunnel of end distension occurs, its country rock normally mud stone, one of maximum characteristic of mud stone is exactly inundated intenerating, and most of mud stone is under the state of long-term immersion, and its intensity level is minimum is reduced to about 10% of intensity level under its dry state.This is a fearful numerical value, intensity reduces the continuation expansion that the direct result caused is base plate relaxation zone, the expansion of relaxation zone makes the scope by water soaking larger, cause the creep of country rock particle in relaxation zone to aggravate on the one hand, also the creep power of peripheral rock mass can be caused to strengthen because the radial forces of the external country rock body of relaxation zone reduces on the other hand.The direct result of the expansion of base plate relaxation zone and the enhancing of rock particle creep ability causes floor rock particle to move to roadway direction exactly, forms end distension.
Summary of the invention
For above-mentioned technical problem, the object of the present invention is to provide the administering method of distension at the bottom of a kind of coal mine sloping lane.
The present invention adopt technical scheme be:
An administering method for distension at the bottom of coal mine sloping lane, comprises the following steps:
(a) water blockoff: first bore several injected holes in the floor strata of the upper entry near upper end, inclined gallery, then carry out slip casting to described injected hole, described injected hole comprises injected hole one and injected hole two, and bored grouting carries out at twice:
Bored grouting first: bore several injected holes one in the floor strata of the upper entry at the 2m place, upper end apart from inclined gallery; Then adopt grouting serous fluid to carry out slip casting to described injected hole one, the slip casting time of described injected hole one keeps 5 ~ 10 minutes after reaching grouting pressure, and grouting pressure is 2 ~ 3MPa, grouting sequence: first, rear both sides;
Second time bored grouting: apart from bored grouting section 1.5m place first described on entry floor strata in bore several injected holes two; Then carry out slip casting to described injected hole two, grouting pressure is 2 ~ 3MPa, and the slip casting time keeps 5 ~ 10 minutes after reaching grouting pressure;
B () is hydrophobic: in step (a), water blockoff operation is carried out hydrophobic after completing, and the hydrophobic time is 24h;
(c) bottom slip casting: bore row's bottom injected hole in the floor strata of the end of the lower entry in the lower end of described inclined gallery and slip casting is carried out to described bottom injected hole, grouting sequence: first, rear both sides, grouting pressure is 2 ~ 3MPa, the slip casting time: keep 5 ~ 15 minutes after reaching grouting pressure;
D () is in the milk: in the floor strata of the upper end of described inclined gallery, arrange several grout holes, and bottom slip casting described in step (c) is implemented to implement grouting to described grout hole after 24 hours.
The administering method of distension at the bottom of coal mine sloping lane of the present invention, wherein, the degree of depth of injected hole described in step (a) is 4.5m ~ 5m, described injected hole one is set to 4 ~ 5, described injected hole two is set to 2 ~ 3, and described injected hole one and injected hole two are equidistantly arranged along baseplate width respectively.
The administering method of distension at the bottom of coal mine sloping lane of the present invention, wherein, grouting point described in step (d) is carried out for 4 times, quantity by described grout hole is set to 4, be respectively grout hole one, grout hole two, grout hole three and grout hole four, described grout hole three and grout hole four are arranged near base plate both sides respectively, described grout hole one, grout hole two is between grout hole three and grout hole four, first grout hole one is in the milk, grouting time overflows slurries with the backplate surface of lower end, inclined gallery and is as the criterion, after 6 hours, grout hole two is in the milk, then successively grout hole three and grout hole four are in the milk.
The administering method of distension at the bottom of coal mine sloping lane of the present invention, wherein, the cement paste of grouting serous fluid described in step (a), water/binder ratio is 0.7.
The administering method of distension at the bottom of coal mine sloping lane of the present invention, wherein, second time bored grouting and 24 hours described time intervals of bored grouting first described in step (a).
The administering method of distension at the bottom of coal mine sloping lane of the present invention, wherein, the injected hole quantity of bottom described in step (c) is set to 4, and the hole depth of described bottom injected hole is 4.5m ~ 5m.
The administering method of distension at the bottom of coal mine sloping lane of the present invention, wherein, described grout hole is equidistantly arranged along baseplate width.
The administering method of distension at the bottom of coal mine sloping lane of the present invention, wherein, adopts cement paste slurries to be in the milk, slurry water gray scale 0.7.
The administering method of distension at the bottom of coal mine sloping lane of the present invention, wherein, the hole depth of described grout hole is 4.5 ~ 5m.
Beneficial effect of the present invention:
The administering method of distension at the bottom of coal mine sloping lane of the present invention, its beneficial effect shows two aspects: after the water blockoff of (1) upper end, inclined gallery, free water in the base plate of inclined gallery incites somebody to action drainage gradually, the intensity of the inclined gallery floor rock after drainage water will significantly promote, space simultaneously originally occupied by flowing water and crack are by out vacant, for follow-up slurries enter and smoothly by laying the foundation, for smooth, the efficient enforcement of slip casting is ready; (2) after slurry filling, can be closely knit by the space in the floor strata of inclined gallery, fracture filling, ponding again can be prevented, after such floor rock departs from the immersion of water, rock strength is greatly enhanced, and by again cementing for rock that is broken or that split, thus can further improve the integrated carrying ability of floor rock in addition, present invention process is simple in addition, and cost is low and can effectively administer distension at the bottom of coal mine sloping lane.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the administering method of distension at the bottom of coal mine sloping lane of the present invention.
In figure 1, injected hole; 11, injected hole one; 12, injected hole two; 2, grout hole; 21, grout hole one; 22, grout hole two; 23, grout hole three; 24, grout hole four; 3, bottom injected hole; 4, inclined gallery; 5, upper entry; 6, lower entry; 7, base plate relaxation zone; 8, flowing water.
Below in conjunction with specific embodiments and the drawings, the invention will be further described.
Detailed description of the invention
As shown in Figure 1, the administering method of distension at the bottom of a kind of coal mine sloping lane, comprises the following steps:
(a) water blockoff: first bore injected hole 1 in the floor strata of the upper entry 5 near upper end, inclined gallery 4, injected hole 1 degree of depth is 4.5m ~ 5m; Then carry out slip casting to injected hole 1, injected hole 1 comprises injected hole 1 and injected hole 2 12, and bored grouting carries out at twice:
Bored grouting first: bore injected hole 1 in the floor strata of the upper entry 5 at the 2m place, upper end apart from inclined gallery 4, injected hole 1 is set to 4 ~ 5, equidistantly arranges along baseplate width; Then adopt grouting serous fluid to carry out slip casting to injected hole 1, the slip casting time of injected hole 1 keeps 5 ~ 15 minutes after reaching grouting pressure, and grouting pressure is 2 ~ 3MPa, grouting sequence: first, rear both sides, successively slip casting;
Second time bored grouting: bore injected hole 2 12 in distance first the bored grouting section i.e. floor strata of the upper entry 5 at distance injected hole 1 horizontal range 1.5m place, injected hole 2 12 is set to 2 ~ 3, equidistantly arranges along baseplate width; Then carry out slip casting to injected hole 2 12, grouting pressure is 2 ~ 3MPa, the slip casting time: keep 5 ~ 15 minutes after reaching grouting pressure, grouting serous fluid cement paste, water/binder ratio 0.7; Second time bored grouting and first 24 hours bored grouting time intervals;
B () is hydrophobic: in step (a), water blockoff operation is carried out hydrophobic after completing, and the hydrophobic time is 24 hours;
(c) bottom slip casting: equidistantly bore injected hole 3 bottom a row along baseplate width and slip casting is carried out to bottom injected hole 3 in the floor strata of lower entry 6 end of lower end, inclined gallery 4, bottom injected hole 3 quantity is set to 4, the hole depth of bottom injected hole 3 is 4.5m ~ 5m, grouting sequence: first, rear both sides, grouting pressure is 3MPa, the slip casting time: keep 5 ~ 15 minutes after reaching grouting pressure;
D () is in the milk: in the floor strata of upper end, inclined gallery 4, arrange grout hole 2, grout hole 2 quantity is 4, be respectively grout hole 1, grout hole 2 22, grout hole 3 23 and grout hole 4 24, grout hole 2 is equidistantly arranged along baseplate width, grout hole 3 23 and grout hole 4 24 are arranged near base plate both sides respectively, grout hole 1, grout hole 2 22 is between grout hole 3 23 and grout hole 4 24, bottom slip casting described in step (c) is implemented to implement grouting to grout hole 2 after 24 hours, grouting point is carried out for 4 times, first grout hole 1 is in the milk, cement paste slurries are adopted to be in the milk, slurry water gray scale 0.7, grouting time overflows slurries with the backplate surface of lower end, inclined gallery 4 and is as the criterion, after 6 hours, grout hole 2 22 is in the milk, then successively grout hole 3 23 and grout hole 4 24 are in the milk, grout hole 1, grout hole 2 22, the hole depth of grout hole 3 23 and grout hole 4 24 is 5m, the grouting time interval of adjacent grout hole 2, grouting time, grouting slurries are identical.
Flowing water 8 in the base plate relaxation zone 7 of inclined gallery comes from entry, and this flowing water 8 pairs of inclined gallery base plates cause long period of soaking that rock strength is reduced.Adopt the administering method of distension at the bottom of coal mine sloping lane of the present invention, first water blockoff is carried out, so-called water blockoff is exactly that bored grouting is implemented in the place of close end, inclined gallery 4 in the upper entry 5 be connected with inclined gallery 4, in order to ensure the effect of grouting for water blocking, slip casting is carried out at twice, after slip casting, upper entry 5 is cut off with the water conservancy relation of these inclined gallery 4, and pipelined channel is blocked reality; Because water conservancy source is blocked reality, waterpower supply is no longer there is in inclined gallery, water in original lower raft relaxation zone 7 also can flow to coupled lower entry 6 because of the effect of gravity fast, through certain hour, the water in inclined gallery 4 namely can drainage, along with the drainage of water, the intensity of inclined gallery floor rock can be very fast significantly raising, time is more of a specified duration, and the aridity of base plate is higher, the strength enhancing of floor rock also higher; Injected hole 3 bottom a row be set in the end of the lower entry 6 of the lower end of inclined gallery 4 and carry out slip casting, when object is to prevent upper end to be in the milk, flows away behind slurry stream downward horizontal tunnel 6, affect grouting quality; In order to improve the intensity of floor rock further, continue to implement grouting after hydrophobic end.Grouting on the one hand can be closely knit by the space in the floor strata of inclined gallery, fracture filling fully, and prevent ponding again, after floor rock departs from the immersion of water, rock strength can significantly improve; By again cementing for rock that is broken or that split, the integrated carrying ability of floor rock can be improved on the other hand.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (9)
1. an administering method for distension at the bottom of coal mine sloping lane, is characterized in that: comprise the following steps:
(a) water blockoff: first bore several injected holes (1) in the floor strata of the upper entry (5) near inclined gallery (4) upper end; Then carry out slip casting to described injected hole (1), described injected hole (1) comprises injected hole one (11) and injected hole two (12), and bored grouting carries out at twice:
Bored grouting first: bore several injected holes one (11) in the floor strata of the upper entry (5) at the 2m place, upper end apart from inclined gallery (4); Then grouting serous fluid is adopted to carry out slip casting to described injected hole one (11), the slip casting time of described injected hole one (11) keeps 5 ~ 15 minutes after reaching grouting pressure, grouting pressure is 2 ~ 3MPa, grouting sequence: first, rear both sides;
Second time bored grouting: apart from bored grouting section 1.5m place first described on entry (5) floor strata in bore several injected holes two (12); Then carry out slip casting to described injected hole two (12), grouting pressure is 2 ~ 3MPa, and the slip casting time keeps 5 ~ 10 minutes after reaching grouting pressure;
B () is hydrophobic: in step (a), water blockoff operation is carried out hydrophobic after completing, and the hydrophobic time is 24h;
(c) bottom slip casting: bore row bottom injected hole (3) in the floor strata of lower entry (6) end of described inclined gallery (4) lower end, and slip casting is carried out to described bottom injected hole (3), grouting sequence: first, rear both sides, grouting pressure is 2 ~ 3MPa, and the slip casting time keeps 5 ~ 15 minutes after reaching grouting pressure;
D () is in the milk: in the floor strata of described inclined gallery (4) upper end, arrange several grout holes (2), and bottom slip casting described in step (c) is implemented to implement grouting to described grout hole (2) after 24 hours.
2. the administering method of distension at the bottom of coal mine sloping lane according to claim 1, it is characterized in that: injected hole described in step (a) (1) degree of depth is 4.5m ~ 5m, described injected hole one (11) is set to 4 ~ 5, described injected hole two (12) is set to 2 ~ 3, and described injected hole one (11) and injected hole two (12) are equidistantly arranged along baseplate width respectively.
3. the administering method of distension at the bottom of coal mine sloping lane according to claim 1, it is characterized in that: grouting point described in step (d) is carried out for 4 times, quantity by grout hole (2) is set to 4, be respectively grout hole one (21), grout hole two (22), grout hole three (23) and grout hole four (24), described grout hole three (23) and grout hole four (24) are arranged near base plate both sides respectively, described grout hole one (21), grout hole two (22) is positioned between grout hole three (23) and grout hole four (24), first grout hole one (21) is in the milk, grouting time overflows slurries with the backplate surface of inclined gallery (4) lower end and is as the criterion, after 6 hours, grout hole two (22) is in the milk, then successively grout hole three (23) and grout hole four (24) are in the milk.
4. the administering method of distension at the bottom of coal mine sloping lane according to claim 2, is characterized in that: the cement paste of grouting serous fluid described in step (a), and water/binder ratio is 0.7.
5. the administering method of distension at the bottom of coal mine sloping lane according to claim 2, is characterized in that: second time bored grouting and 24 hours described time intervals of bored grouting first described in step (a).
6. the administering method of distension at the bottom of coal mine sloping lane according to claim 1, is characterized in that: injected hole (3) quantity of bottom described in step (c) is set to 4, and the hole depth of described bottom injected hole (3) is 4.5m ~ 5m.
7. the administering method of distension at the bottom of coal mine sloping lane according to claim 3, is characterized in that: described grout hole (2) is equidistantly arranged along baseplate width.
8. the administering method of distension at the bottom of coal mine sloping lane according to claim 3, is characterized in that: adopt cement paste slurries to be in the milk, slurry water gray scale 0.7.
9. the administering method of distension at the bottom of the coal mine sloping lane according to claim 7 or 8, is characterized in that: the hole depth of described grout hole (2) is 5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410690007.0A CN104481556B (en) | 2014-11-25 | 2014-11-25 | A kind of improvement method of distension at the bottom of coal mine sloping lane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410690007.0A CN104481556B (en) | 2014-11-25 | 2014-11-25 | A kind of improvement method of distension at the bottom of coal mine sloping lane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104481556A true CN104481556A (en) | 2015-04-01 |
| CN104481556B CN104481556B (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410690007.0A Expired - Fee Related CN104481556B (en) | 2014-11-25 | 2014-11-25 | A kind of improvement method of distension at the bottom of coal mine sloping lane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111411983A (en) * | 2020-03-30 | 2020-07-14 | 中煤新集能源股份有限公司 | Repair process for improving compressive strength of underground coal mine roadway surrounding rock loosening ring |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089011A (en) * | 1992-12-29 | 1994-07-06 | 中国矿业大学 | A kind of control floor lift in gallery technology |
| CN1840856A (en) * | 2005-03-30 | 2006-10-04 | 中国矿业大学 | Bottom plate concealed type reverse-arc grouting construction method |
| CN101349155A (en) * | 2007-07-20 | 2009-01-21 | 河南理工大学 | Apparatus for controlling laneway bottom heave |
| CN101839140A (en) * | 2010-03-31 | 2010-09-22 | 中国矿业大学 | Method for reinforcing roadway floor by grouting |
| CN101886545A (en) * | 2010-07-05 | 2010-11-17 | 北京科技大学 | Method for treating bottom heave of soft rock roadway by using micro broken stone pipe cast pile |
-
2014
- 2014-11-25 CN CN201410690007.0A patent/CN104481556B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089011A (en) * | 1992-12-29 | 1994-07-06 | 中国矿业大学 | A kind of control floor lift in gallery technology |
| CN1840856A (en) * | 2005-03-30 | 2006-10-04 | 中国矿业大学 | Bottom plate concealed type reverse-arc grouting construction method |
| CN101349155A (en) * | 2007-07-20 | 2009-01-21 | 河南理工大学 | Apparatus for controlling laneway bottom heave |
| CN101839140A (en) * | 2010-03-31 | 2010-09-22 | 中国矿业大学 | Method for reinforcing roadway floor by grouting |
| CN101886545A (en) * | 2010-07-05 | 2010-11-17 | 北京科技大学 | Method for treating bottom heave of soft rock roadway by using micro broken stone pipe cast pile |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111411983A (en) * | 2020-03-30 | 2020-07-14 | 中煤新集能源股份有限公司 | Repair process for improving compressive strength of underground coal mine roadway surrounding rock loosening ring |
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| CN104481556B (en) | 2016-05-11 |
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Granted publication date: 20160511 Termination date: 20181125 |