CN103741702B - A kind of mill tailings storehouse catch pit rigidity method for blocking - Google Patents
A kind of mill tailings storehouse catch pit rigidity method for blocking Download PDFInfo
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- CN103741702B CN103741702B CN201410019470.2A CN201410019470A CN103741702B CN 103741702 B CN103741702 B CN 103741702B CN 201410019470 A CN201410019470 A CN 201410019470A CN 103741702 B CN103741702 B CN 103741702B
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Abstract
A kind of mill tailings storehouse catch pit rigidity method for blocking, at catch pit and outlet tunnel joint portion cast-in-situ concrete shutoff block, pre-buried draining steel pipe in casting process, and boulder bed is set on concrete shutoff block, boulder bed arranges sand gravel layer, sand gravel layer is arranged non-woven geotechnical cloth layer I, non-woven geotechnical cloth layer I is arranged thick tailings layer, and the entrance point wrapped multiple non-woven geotextile of draining steel pipe, be placed in the boulder bed above catch pit section concrete shutoff block, the port of export is placed in the outside of water discharge tunnel section concrete shutoff block; In water discharge tunnel exit, Parallel to the flow direction arranges packed thick tailings layer I together, packed thick tailings layer I arranged outside non-woven geotechnical cloth layer II, the packed thick tailings layer II of non-woven geotechnical cloth layer II arranged outside, packed thick tailings layer II arranged outside bagged sand layer of gravel.The present invention, by improving the stress condition of occluding body, can effectively avoid shutoff to lose efficacy, and easy construction is quick, economy, environmental protection.
Description
Technical field
The present invention relates to a kind of mill tailings storehouse flood drainage system method for blocking, particularly relate to a kind of mill tailings storehouse catch pit rigidity method for blocking.
Background technology
Flood drainage system is one of crucial structure of Tailings Dam, plays a very important role the security and stability of Tailings Dam, because the flood drainage system Safety of Tailings Dam accident caused that lost efficacy almost accounts for 50% of total accident.
China's major part mill tailings storehouse is mountain valley-type, and Tailings Dam accumulation mode more than 90% is built a dam for upper reaches method, such Tailings Dam flood drainage system import many employings catch pit, the common 10-12m of derrick height, the highest 50m at present.
When tailing dam height exceedes catch pit derrick height, task of drainning off floodwaters is born successively by a few phase flood drainage system, before new first phase flood drainage system is formally enabled, and the flood drainage system that necessary shutoff is old.
At present, Tailings Dam catch pit rigidity method for blocking mainly adopts the shutoff of the rigid material such as rubble concrete or cemented rock, unsatisfactory in engineering practice, analyzes the reason lost efficacy and mainly contains: cover tailings pressure 1) excessive to occluding body thrust, cause occluding body slippage unstability, shutoff was lost efficacy; 2) occluding body insufficient strength, causes occluding body shear failure, and shutoff was lost efficacy; 3) Construction defect, causes occluding body and drainage structures to there is seepage gap, and shutoff was lost efficacy.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of mill tailings storehouse catch pit rigidity method for blocking that can effectively avoid shutoff to lose efficacy.
The technical solution adopted for the present invention to solve the technical problems is: a kind of mill tailings storehouse catch pit rigidity method for blocking, at catch pit and water discharge tunnel joint portion cast-in-situ concrete shutoff block, pre-buried draining steel pipe in casting process, and boulder bed is set on concrete shutoff block, boulder bed arranges sand gravel layer, sand gravel layer is arranged non-woven geotechnical cloth layer I, non-woven geotechnical cloth layer I is arranged thick tailings layer, and the entrance point wrapped multiple non-woven geotextile of draining steel pipe (preferred 2-5 layer), be placed in the boulder bed above catch pit section concrete shutoff block, the port of export is placed in the outside of water discharge tunnel section concrete shutoff block, in water discharge tunnel exit, Parallel to the flow direction arranges packed thick tailings layer I together, packed thick tailings layer I arranged outside non-woven geotechnical cloth layer II, the packed thick tailings layer II of non-woven geotechnical cloth layer II arranged outside, packed thick tailings layer II arranged outside bagged sand layer of gravel.
Further, described water discharge tunnel gutter replaces.
Further, described boulder bed macadam replaces.
Further, the port of export parcel 1-2 layer non-woven geotextile of described draining steel pipe.
The intensity of described concrete shutoff block generally adopts C25, should adopt slightly expanded concrete, occluding body is contacted with discharge structure more tight, eliminates contact gap; Laminated pouring, lift height controls at 1.5-2.0m; Catch pit-water discharge tunnel block section inwall should be cleared up before building; During cast, each interlayer concrete joint surface should carry out artificial chiseling; If desired, pre-embedment grouting pipe, carries out backfill grouting, joint grouting measure to shutoff block.
Described non-woven geotextile must in layer be paved, and discloses reality for gap place waddy is auxiliary, and it is tight to make every effort to gap caulked.
Described packed thick tailings layer I, packed thick tailings layer II should make sack with non-woven geotextile, and bagged sand layer of gravel can with the sack of snakeskin woven bag or other material, packed capacity facilitating transport, facilitate manually be laid in suitable.According to on-the-spot needs, some pouches can be loaded with the gap of each layer of caulked.
The main beaer of the present invention is concrete shutoff block, and the boulder bed on it, sand gravel layer, non-woven geotechnical cloth layer I, thick tailings layer be both the permeable loaded filter of first, were again the energy dissipating topping of concrete shutoff block; Draining steel pipe entrance point is placed in boulder bed, ensures catchmenting and can import in draining steel pipe through entrance point above concrete shutoff block, and the parcel of multilayer non-woven geotextile ensures that water is discharged by draining steel pipe, and tailings is not revealed by draining steel pipe; Water discharge tunnel outlet arranges second loaded filter, more effectively avoids tailings in storehouse to be leaked to downstream contamination environment by reserved draining steel pipe.
Compared with prior art, the present invention has the following advantages:
(1) by arranging draining steel pipe, contribute to the consolidation draining of tailings above concrete shutoff block, the mine tailing total stress that concrete shutoff block catch pit top is subject to is converted into effective stress, improves the stress condition of concrete shutoff block;
(2) by shutoff to catch pit-water discharge tunnel junction, make the thrust of catch pit top tailings to concrete shutoff block be converted into pressure to shaft bottom, improve the stress condition of concrete shutoff block;
(3) the filter protection layer on concrete shutoff block top produces energy dissipating effect to the high-velocity flow entering catch pit, can protect concrete shutoff block well;
(4) the permeable anti-filter measure of multilayer, at utmost reduce the possibility that tailings is revealed by reserved draining steel pipe, the feature of environmental protection is strong;
(5) be easy to implement fast, cost economic.
Accompanying drawing explanation
Fig. 1 is the layout schematic diagram of concrete shutoff block and upper filter protection layer thereof;
Fig. 2 is the layout schematic diagram of water discharge tunnel exit filter protection layer;
In figure: 1-catch pit; 2-well seat; 3-derrick; 4-water discharge tunnel; 5-draining steel pipe; 6-boulder bed; 7-sand gravel layer; 8-non-woven geotechnical cloth layer I; The thick tailings layer of 9-; 10-concrete shutoff block; The packed thick tailings layer I of 11-; 12-non-woven geotechnical cloth layer II; The packed thick tailings layer II of 13-; 14-bagged sand layer of gravel.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
With reference to accompanying drawing, the mill tailings storehouse catch pit rigidity method for blocking of the present embodiment, well seat 2 and derrick 3 is comprised at catch pit 1() and water discharge tunnel 4 joint portion cast-in-situ concrete shutoff block 10, pre-buried draining steel pipe 5 in casting process, and boulder bed 6 is set on concrete shutoff block 10, boulder bed 6 is arranged sand gravel layer 7, sand gravel layer 7 is arranged non-woven geotechnical cloth layer I 8, non-woven geotechnical cloth layer I 8 is arranged thick tailings layer 9, and the entrance point of draining steel pipe 5 wraps up 3 layers of non-woven geotextile, be placed in the boulder bed 6 above catch pit section concrete shutoff block, the port of export of draining steel pipe 5 wraps up 2 layers of non-woven geotextile, be placed in the outside of water discharge tunnel section concrete shutoff block, in water discharge tunnel 4 exit, Parallel to the flow direction arranges packed thick tailings layer I 11 together, packed thick tailings layer I 11 arranged outside non-woven geotechnical cloth layer II 12, the packed thick tailings layer II 13 of non-woven geotechnical cloth layer II 12 arranged outside, packed thick tailings layer II 13 arranged outside bagged sand layer of gravel 14.
Certainly, described boulder bed also can with macadam substitute, and for catch pit side connect gutter time the present invention be suitable for too.
Claims (4)
1. a mill tailings storehouse catch pit rigidity method for blocking, it is characterized in that: at catch pit and water discharge tunnel joint portion cast-in-situ concrete shutoff block, pre-buried draining steel pipe in casting process, and boulder bed is set on concrete shutoff block, boulder bed arranges sand gravel layer, sand gravel layer is arranged non-woven geotechnical cloth layer I, non-woven geotechnical cloth layer I is arranged thick tailings layer, and the entrance point wrapped multiple non-woven geotextile of draining steel pipe, be placed in the boulder bed above catch pit section concrete shutoff block, the port of export is placed in the outside of water discharge tunnel section concrete shutoff block, in water discharge tunnel exit, Parallel to the flow direction arranges packed thick tailings layer I together, packed thick tailings layer I arranged outside non-woven geotechnical cloth layer II, the packed thick tailings layer II of non-woven geotechnical cloth layer II arranged outside, packed thick tailings layer II arranged outside bagged sand layer of gravel.
2. mill tailings storehouse according to claim 1 catch pit rigidity method for blocking, is characterized in that: described water discharge tunnel gutter replaces.
3. mill tailings storehouse according to claim 1 and 2 catch pit rigidity method for blocking, is characterized in that: described boulder bed macadam replaces.
4. mill tailings storehouse according to claim 1 and 2 catch pit rigidity method for blocking, is characterized in that: the port of export parcel 1-2 layer non-woven geotextile of described draining steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410019470.2A CN103741702B (en) | 2014-01-16 | 2014-01-16 | A kind of mill tailings storehouse catch pit rigidity method for blocking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410019470.2A CN103741702B (en) | 2014-01-16 | 2014-01-16 | A kind of mill tailings storehouse catch pit rigidity method for blocking |
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| Publication Number | Publication Date |
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| CN103741702A CN103741702A (en) | 2014-04-23 |
| CN103741702B true CN103741702B (en) | 2015-12-02 |
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| CN201410019470.2A Expired - Fee Related CN103741702B (en) | 2014-01-16 | 2014-01-16 | A kind of mill tailings storehouse catch pit rigidity method for blocking |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104452788B (en) * | 2014-12-08 | 2016-03-30 | 鞍钢集团矿业公司 | The method for blocking of tailings storage backwater tapered pipeline and device |
| CN104790351B (en) * | 2015-04-23 | 2016-05-11 | 化工部长沙设计研究院 | There is the flood drainage system plugging structure of the underground spring of row and mine tailing water seepage function |
| CN105179011B (en) * | 2015-09-04 | 2018-01-19 | 金建工程设计有限公司 | A kind of tunnel closure facility and its method for blocking |
| CN105133628B (en) * | 2015-09-14 | 2017-05-24 | 中国建筑第二工程局有限公司 | Underground garage sump belt pressure leakage stopping structure and method |
| CN112411708B (en) * | 2020-11-10 | 2022-05-27 | 中钢集团马鞍山矿山研究总院股份有限公司 | Combined plugging and dredging method for drainage chute and drainage culvert of tailing pond |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0414522A (en) * | 1990-05-01 | 1992-01-20 | Shimizu Corp | Method for constructing water stopping layer |
| CN201162271Y (en) * | 2007-12-26 | 2008-12-10 | 南昌有色冶金设计研究院 | Flood-discharging and plugging apparatus of mine tailings warehouse |
| CN102337748A (en) * | 2011-06-17 | 2012-02-01 | 中国石油天然气集团公司 | Two-layer manual liner anti-seepage structure for storage tank foundation and construction method for two-layer manual liner anti-seepage structure |
| CN103410120A (en) * | 2013-07-31 | 2013-11-27 | 鞍钢集团矿业公司 | Blocking system and blocking method for tailing-pond flood discharge tower |
-
2014
- 2014-01-16 CN CN201410019470.2A patent/CN103741702B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0414522A (en) * | 1990-05-01 | 1992-01-20 | Shimizu Corp | Method for constructing water stopping layer |
| CN201162271Y (en) * | 2007-12-26 | 2008-12-10 | 南昌有色冶金设计研究院 | Flood-discharging and plugging apparatus of mine tailings warehouse |
| CN102337748A (en) * | 2011-06-17 | 2012-02-01 | 中国石油天然气集团公司 | Two-layer manual liner anti-seepage structure for storage tank foundation and construction method for two-layer manual liner anti-seepage structure |
| CN103410120A (en) * | 2013-07-31 | 2013-11-27 | 鞍钢集团矿业公司 | Blocking system and blocking method for tailing-pond flood discharge tower |
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| CN103741702A (en) | 2014-04-23 |
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