CN217923694U

CN217923694U - Seepage prevention interception dam for mining area

Info

Publication number: CN217923694U
Application number: CN202221439565.6U
Authority: CN
Inventors: 李辉; 吴轩; 盖晨辉; 茹利利; 刘艺
Original assignee: Inner Mongolia Baotou Steel Group Environmental Engineering Research Institute Co ltd
Current assignee: Inner Mongolia Baotou Steel Group Environmental Engineering Research Institute Co ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2022-11-29
Anticipated expiration: 2032-06-09

Abstract

The utility model discloses a mining area prevention of seepage interception oozes dam, it is provided with the apron including intercepting oozing dam main part, grout enclosure and geomembrane cut-off wall intercepting the earth's surface overburden of oozing dam main part below and the juncture of basement stratum, is provided with the grout enclosure in the basement stratum of apron below, is provided with the geomembrane cut-off wall in the earth's surface overburden of apron top and the interception dam main part. The advantages are that: the utility model discloses the basement stratum adopts the curtain grout to prevent seepage, and earth's surface overburden and cut oozing the dam and adopt vertical compound geomembrane to prevent seepage, directly carry out the curtain grout after excavating the guide way, carry out the soil body backfill after the grout is finished, whole construction is simple, and has saved concrete and steel pipe input, can obviously shorten the time limit for a project, save the investment; and the composite geomembrane is integrally arranged in a zigzag shape, can deform to a certain extent when bearing lateral pressure, cannot leak, has good seepage intercepting effect, can effectively solve the seepage problem of the downstream of the tailing pond, and ensures the environmental protection and safety of the tailing pond.

Description

Seepage prevention seepage-intercepting dam for mining area

The technical field is as follows:

the utility model relates to a mining area cuts and oozes dam technical field, specifically speaking relates to a mining area prevention of seepage oozes dam.

Background art:

in the process of mining mines, people inevitably generate tailings which are difficult to recover, tailings wastewater contains harmful substances such as arsenic, a tailings pond needs to be built in order to prevent the tailings wastewater from leaking into the surrounding ecological environment, and a seepage interception dam is built at the downstream of the tailings pond. A general downstream seepage interception dam of a tailing pond is mainly designed to be an upper wall lower curtain, namely, an upper covering layer and a part of a strongly weathered bedrock layer adopt concrete impervious walls, and the lower weathered bedrock and a weakly weathered bedrock layer adopt curtain grouting treatment. When the designed seepage interception dam is constructed, firstly, a guide groove is dug in an upper covering layer and a part of strongly weathered foundation rock layer, then a concrete impervious wall is cast in the guide groove in a formwork mode, a grouting steel pipe is embedded in the concrete impervious wall in the casting process, and grouting is carried out in the grouting steel pipe to form a grouting curtain after the concrete impervious wall is cast; and (4) removing the formwork after the concrete impervious wall is shaped, and refilling soil into the guide groove after the formwork is removed. The concrete has the problem of cracking under the condition of bearing lateral pressure for a long time, so that the seepage-blocking effect is poor, the whole construction process is complex, a large amount of concrete and grouting steel pipes are consumed, and the problems of long construction period and high investment cost exist.

The utility model has the following contents:

an object of the utility model is to provide a low cost mining area prevention of seepage cuts oozes dam.

The utility model discloses by following technical scheme implement: an anti-seepage interception dam for a mining area comprises an interception dam body, a grouting enclosing wall and a geomembrane impervious wall, wherein a cover plate is arranged at the junction of a ground surface covering layer and a foundation layer below the interception dam body, and a plurality of pouring holes are arranged on the cover plate at intervals; the grouting enclosing wall is arranged in the subgrade layer below the cover plate, and the geomembrane impervious wall is arranged in the earth surface covering layer above the cover plate and the seepage interception dam main body; the geomembrane cut-off wall comprises a composite geomembrane which is longitudinally arranged and clay layers which are arranged on two sides of the composite geomembrane.

Specifically, the top of the cover plate is fixed with a fixed seat arranged along the length direction of the cover plate, and the bottom end of the composite geomembrane is embedded in the fixed seat.

Specifically, the top of compound geomembrane extends to the top of intercepting and oozing the dam main part is outside, just the top of compound geomembrane is passed through the crab-bolt and is fixed at the top of clay layer.

Specifically, the longitudinal section of the composite geomembrane is in a zigzag shape.

The utility model has the advantages that: the utility model discloses the basement stratum adopts the curtain grout to prevent seepage, and earth's surface overburden and cut oozing the dam and adopt vertical compound geomembrane to prevent seepage, directly carry out the curtain grout after excavating the guide way, carry out the soil body backfill after the grout is finished, whole construction is simple, and has saved concrete and steel pipe input, can obviously shorten the time limit for a project, save the investment; and the composite geomembrane is integrally arranged in a zigzag shape, can deform to a certain extent when bearing lateral pressure, cannot leak, has good seepage intercepting effect, can effectively solve the seepage problem of the downstream of the tailing pond, and ensures the environmental protection and safety of the tailing pond.

Description of the drawings:

fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a partially enlarged view of fig. 1.

The seepage-stopping dam comprises a seepage-stopping dam body 1, a grouting enclosing wall 2, a geomembrane impervious wall 3, a ground surface covering layer 4, a basement rock layer 5, a cover plate 6, a pouring hole 7, a composite geomembrane 8, a clay layer 9, a fixed seat 10, an anchor bolt 11 and a pressing plate 12.

The specific implementation mode is as follows:

in the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 and 2, the seepage-proofing interception dam for the mining area comprises an interception dam body 1, a grouting enclosing wall 2 and a geomembrane impervious wall 3, wherein a cover plate 6 is arranged at the junction of a ground surface covering layer 4 and a basement layer 5 below the interception dam body 1, a plurality of pouring holes 7 are arranged on the cover plate 6 at intervals, and the cover plate 6 can prevent local slurry leakage in the grouting process so as to ensure the grouting effect; a grouting enclosing wall 2 is arranged in a basement layer 5 below the cover plate 6, and a geomembrane impervious wall 3 is arranged in a ground surface covering layer 4 above the cover plate 6 and the seepage interception dam body 1; the geomembrane cut-off wall 3 comprises a composite geomembrane 8 and clay layers 9, wherein the composite geomembrane 8 is longitudinally arranged, the clay layers 9 are arranged on two sides of the composite geomembrane 8, the longitudinal section of the composite geomembrane 8 is in a zigzag shape so as to ensure that the composite geomembrane 8 has sufficient looseness and prevent the composite geomembrane 8 from being broken after being subjected to lateral pressure, and the clay layers 9 are used as protective layers.

The fixing seat 10 arranged along the length direction of the cover plate is fixed to the top of the cover plate 6, the cover plate 6 and the fixing seat 10 are concrete castings, the bottom end of the composite geomembrane 8 is embedded in the fixing seat 10, the bottom of the composite geomembrane 8 is fixed through the fixing seat 10, the sealing performance between the composite geomembrane 8 and the cover plate 6 is guaranteed, and the anti-seepage effect is further guaranteed. The top of compound geomembrane 8 extends to the top outside of intercepting dam main part 1, and the top of compound geomembrane 8 is fixed at the top of clay layer 9 through crab-bolt 11, fixes compound geomembrane 8's top through crab-bolt 11, can play and strengthen the fixed action, prevents that 8 side direction atress of compound geomembrane from retracting, guarantees the stability of structure. The top of the geomembrane impervious wall 3 is provided with a pressing plate 12, the top end of the composite geomembrane 8 is arranged between the bottom of the pressing plate 12 and the top of the clay layer 9, an anchor bolt 11 penetrates through the pressing plate 12 to fix the top end of the composite geomembrane 8 at the top of the clay layer 9, and the whole composite geomembrane 8 is tightly pressed at the top of the clay layer 9 through the pressing plate 12.

The construction process comprises the following steps: firstly, after a guide groove is dug in an original earth surface covering layer 4 to a foundation layer 5, a cover plate 6 is arranged at the top of the foundation layer 5 at the bottom of the guide groove; then grouting through the pouring hole 7 to form a grouting enclosing wall; then, chiseling the top end of the cover plate 6, pouring concrete on the top of the cover plate to form a fixed seat 10, and embedding the bottom end of the composite geomembrane 8 into the fixed seat 10 in the process of pouring the fixed seat 10; after the fixing seat 10 is shaped, filling clay layer by layer on two sides of the composite geomembrane 8, simultaneously filling the earth surface covering layer 4 in the guide groove outside the clay, and backfilling and compacting layer by layer to form a clay layer 9; and finally, piling up the seepage intercepting dam body 1 outside the clay layer 9 above the earth surface covering layer 4, and anchoring the upper end of the composite geomembrane 8 at the top of the clay layer 9 through an anchor bolt 11.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims

1. An anti-seepage interception dam for a mining area comprises an interception dam body and is characterized by further comprising a grouting enclosing wall and a geomembrane anti-seepage wall, wherein a cover plate is arranged at the junction of a ground surface covering layer and a foundation layer below the interception dam body, and a plurality of pouring holes are formed in the cover plate at intervals; the grouting enclosing wall is arranged in the subgrade layer below the cover plate, and the geomembrane impervious wall is arranged in the earth surface covering layer above the cover plate and the seepage interception dam main body; the geomembrane cut-off wall comprises a composite geomembrane which is longitudinally arranged and clay layers which are arranged on two sides of the composite geomembrane.

2. The seepage-proofing seepage-stopping dam for mining areas according to claim 1, wherein the top end of the composite geomembrane extends to the outside of the top end of the seepage-stopping dam body, and the top end of the composite geomembrane is fixed on the top of the clay layer through an anchor bolt.

3. The mining impermeable intercepting dam of claim 2, wherein a pressing plate is arranged on the top of the geomembrane impermeable wall, the top end of the composite geomembrane is arranged between the bottom of the pressing plate and the top of the clay layer, and the anchor bolt penetrates through the pressing plate to fix the top end of the composite geomembrane on the top of the pressing plate.

4. The seepage-proofing seepage-intercepting dam for the mining area according to any one of claims 1 to 3, wherein a fixed seat arranged along the length direction of the cover plate is fixed at the top of the cover plate, and the bottom end of the composite geomembrane is embedded in the fixed seat.

5. The seepage-proofing interception dam for mining areas according to any of claims 1 to 3, characterized in that the longitudinal section of said composite geomembrane is zigzag.

6. The seepage-proofing interception dam of mining area according to claim 4, characterized in that the longitudinal section of said composite geomembrane is zigzag.