Tailing anti-seepage damming for surface mine

Abstract

The utility model provides a surface mine tailing anti-seepage damming which is characterized in that a buffer layer and an anti-seepage layer are arranged on the outer side of a tailing pile, and a first anti-seepage film is arranged in the anti-seepage layer; a drainage ditch is laid above the tailing pile, and a second impermeable film is laid on the upper surface of the tailing pile; a plurality of seepage wells are uniformly distributed on the tailing pile, and the depth of the seepage wells is matched with the stacking height of the tailing pile; a seepage pipe is arranged in the seepage well, gravel is filled between the seepage well and the seepage pipe, and a suction pipe is arranged in the seepage pipe; the feeding end of the suction pump is connected with the suction pipe, and the discharging end of the suction pump extends to the drainage ditch. Seepage prevention treatment is conducted on the portion, close to the outer side, of the tailings, so that underground water pollution caused by transverse seepage of the tailings in the rainy season is avoided, seepage wells are arranged, underground water in the tailings is collected through the seepage wells, and seepage pollution is avoided to the maximum extent.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of tailing anti-seepage, and particularly relates to an open-pit mine tailing anti-seepage dam. BACKGROUND

[0002] Tailing is a place where tailing or other industrial waste slag discharged after sorting of metal or non-metal ore is stacked, and is formed by damming or land sealing, and is prone to inducing local slope instability under external force, and further triggering secondary geological disasters such as landslides and debris flows, and is a major safety hazard for mine safety production, and tailing seepage water is a major pollutant, and current anti-seepage treatment is generally only performed below the tailing, and the tailing is prone to flowing out of the tailing stack through cracks or seepage in the rainy season, thereby causing environmental pollution.

[0003] Therefore, it is necessary to provide an improved technical solution for the above-mentioned deficiencies of the prior art. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of open-pit mine tailing anti-seepage dams, to overcome the deficiencies in the prior art described above.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] An open-pit mine tailing anti-seepage dam, comprising:

[0007] A tailing stack is provided with a buffer layer and an anti-seepage layer on the outer side thereof, and a first anti-seepage membrane is arranged inside the anti-seepage layer; a drainage ditch is laid above the tailing stack, and a second anti-seepage membrane is laid on the upper surface of the tailing stack;

[0008] A seepage well is uniformly distributed on the tailing stack, and the depth of the seepage well is matched with the stacking height of the tailing stack; a seepage pipe is arranged in the seepage well, and the seepage well and the seepage pipe are filled with gravel; and a suction pipe is arranged in the seepage pipe.

[0009] A suction pump is connected to the suction pipe at the inlet end thereof, and the outlet end of the suction pump extends to the drainage ditch.

[0010] Preferably, a plurality of anchor rods are arranged in an array above the buffer layer and the anti-seepage layer, and the anchor rods pass through the corresponding first anti-seepage membrane.

[0011] Preferably, a grouting hole is arranged on the outer wall of the anchor rod, and the anchor rods and the corresponding buffer layer or anti-seepage layer are consolidated by grouting.

[0012] Preferably, a soil layer is laid above the second anti-seepage membrane, and the second anti-seepage membrane extends upward along the seepage pipe to the upper part of the soil layer.

[0013] Preferably, the middle of the seepage pipe is provided with a stabilizing frame corresponding to the second impermeable membrane, the stabilizing frame comprises an outer frame, a hoop and spokes, the hoop is arranged to fix the second impermeable membrane on the outer wall of the seepage pipe by hoop fastening, the outer frame is concentrically distributed with the hoop, and a plurality of spokes are arranged between the outer frame and the hoop in a detachable manner and are uniformly distributed about the circumference thereof.

[0014] Preferably, the spokes fasten the outer frame and the hoop by bolts.

[0015] Preferably, a plurality of seepage openings are uniformly arranged on the middle and lower part of the outer wall of the seepage pipe, a conical liquid collecting groove is arranged at the bottom of the seepage well, the seepage pipe extends into the liquid collecting groove, and a filter cover is arranged at the lower end of the suction pipe.

[0016] Beneficial effects: the tailings are treated for impermeability near the outer side, so as to avoid the pollution of groundwater caused by the transverse seepage of tailings in the rainy season, and the seepage well is arranged to collect the groundwater inside the tailings, so as to maximize the seepage pollution. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of this application provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute an improper limitation on the present application. Among them:

[0018] Fig. 1 The protective structure diagram of the tailings heap in the specific embodiment provided by the present application;

[0019] Fig. 2 The structure diagram of the seepage well in the specific embodiment provided by the present application;

[0020] Fig. 3 The structure diagram of the supporting mechanism in the specific embodiment provided by the present application.

[0021] In the drawings: 1, tailings heap; 2, seepage well; 3, buffer layer; 4, impermeable layer; 5, first impermeable membrane; 6, anchor rod; 7, impermeable bottom; 8, sealing membrane; 9, second impermeable membrane; 10, soil layer; 201, liquid collecting groove; 202, filter cover; 203, arc-shaped supporting plate; 204, spoke; 205, supporting sleeve; 206, sealing cover; 207, air pipe; 208, suction pipe; 209, suction pump; 210, drainage ditch; 211, hoop; 212, gravel; 213, seepage pipe; 214, bolt; 215, supporting column. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the protection scope of the present application.

[0023] In the description of the present application, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" and the like is the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application, rather than requiring the present application to be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application. The terms "connected", "connected" used in the present application should be understood broadly, for example, it can be fixed connection, or detachable connection; it can be directly connected, or indirectly connected through intermediate components, and those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] The present application will be described in detail below with reference to the drawings and in combination with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0025] As shown in the drawings, Figs. 1-3 A kind of open-pit mine tailings seepage prevention dam, including tailings 1, seepage well 2 and suction pump 209, seepage prevention treatment is carried out at the bottom of tailings, specifically after leveling in reservoir area, first, a layer of clay protective layer is laid, then HDPE film, polyethylene film and other seepage prevention materials are laid as third seepage prevention film, then a layer of clay protective layer is laid again, the outer side of tailings 1 is provided with slope, to prevent sliding outward, buffer layer 3 and seepage prevention layer 4 are provided on the outer side of tailings 1, buffer layer 3 is arranged on the outer side of tailings 1, the outer side of buffer layer 3 is provided with buffer slope, to facilitate the accumulation of seepage prevention layer 4, seepage prevention layer 4 is arranged on buffer slope, to further increase the seepage prevention capacity, seepage prevention bottom 7 with elevation below the bottom elevation of tailings 1 or buffer layer 3 is arranged at the bottom of seepage prevention layer 4, seepage prevention bottom 7 is formed by ramming cohesive soil, and seepage prevention bottom 7 extends to below buffer layer 3 along horizontal direction;First seepage prevention film 5 is arranged in seepage prevention layer 4;First seepage prevention film 5 is arranged in seepage prevention layer 4, which can prevent the water in tailings 1 from seeping outward through first seepage prevention film 5, first seepage prevention film 5 includes multiple layers, specifically according to the thickness of seepage prevention layer 4, generally first seepage prevention film 5 is not less than 3 layers, multiple first seepage prevention films 5 are distributed at intervals, and parallel to buffer slope, to further increase the seepage prevention capacity, first seepage prevention film 5 extends to the lower edge of seepage prevention bottom 7 at the bottom, and is bent horizontally to one side of buffer layer 3.

[0026] The bottom of the impermeable bottom 7 is provided with a horizontally extending sealing film 8, which is fixed with the horizontal bending under the first impermeable film. The first impermeable film 5, the second impermeable film, the third impermeable film and the sealing film 8 are made of polyethylene, and are fixed by heat melting. The sealing film 8 is fixed with the third impermeable film at the bottom of the tailings by heat melting.

[0027] The second impermeable film 9 is laid on the tailings 1, and the soil layer 10 is stacked on the second impermeable film 9, so as to avoid the pollution of groundwater seepage caused by the large amount of rainwater infiltration in the rainy season. Further, the drainage ditch 210 is laid on the tailings 1, and extends to the designated liquid accumulation pit. The seepage wells 2 are uniformly distributed on the tailings 1, and the depth of the seepage wells 2 is matched with the stacking height of the tailings 1. The seepage pipes 213 are arranged in the seepage wells 2, and the gravel 212 is filled between the seepage wells 2 and the seepage pipes 213. The suction pipes 208 are arranged in the seepage pipes 213, the suction pump 209 is connected with the suction pipes 208, and the outlet end of the suction pump 209 extends to the drainage ditch 210. In this way, the underground water of the tailings can be pumped out when the underground water is abundant, and the underground water of the tailings is treated and discharged through the liquid accumulation pit for harmless treatment.

[0028] The anchor rods 6 are arranged on the buffer layer 3 and the impermeable layer 4 in an array, and the anchor rods 6 pass through the corresponding first impermeable film 5. Generally, the bottom of the anchor rod 6 extends to the upper edge of the impermeable bottom 7, and does not penetrate into the impermeable bottom 7, so as to ensure the impermeability of the bottom. The outer wall of the anchor rod 6 is provided with a grouting hole, and the anchor rod 6 and the corresponding buffer layer 3 or impermeable layer 4 are consolidated by grouting, so as to ensure the stability of the impermeable layer 4. The upper end of the anchor rod 6 is connected with the anchor net, so as to improve the consolidation capacity between the anchor rods 6. Further, the outer side of the impermeable layer 4 is provided with an impermeable slope, and the grass is laid on the impermeable slope, so as to avoid the occurrence of mudslides. The impermeable layer 4 and the buffer layer 3 are both made of cohesive soil.

[0029] The soil layer 10 is laid on the second impermeable film 9, and the second impermeable film 9 extends upward along the seepage pipe 213 to the upper part of the soil layer 10. The seepage pipe 213 is provided with a stabilizing frame corresponding to the second impermeable film 9. The stabilizing frame includes an outer frame, a hoop 211 and a spoke 204. The outer frame can be circular. The hoop 211 is arranged to fix the second impermeable film 9 on the outer wall of the seepage pipe 213 by clamping. The opening end of the hoop 211 is fixed by bolts, and can be driven by the bolts to tightly hold the outer wall of the seepage pipe 213. The outer frame and the hoop 211 are concentrically arranged. A plurality of spokes 204 are arranged between the outer frame and the hoop 211 in a detachable manner and are uniformly distributed around the circumference.

[0030] The spoke 204 can be square steel or square wood, and the spoke 204 is fixed to the outer frame and the hoop 211 by bolts.

[0031] In an optional embodiment, a plurality of seepage outlets are arranged on the middle and lower part of the outer wall of the seepage pipe 213. The seepage outlets can collect the seepage water inside the tailings heap 1 and then enter the seepage pipe 213. The seepage outlets filter the seepage water. The lower end of the suction pipe 208 extends into the pipe opening of the seepage pipe 213. The upper end of the suction pipe 208 extends out of the seepage pipe 213 and is connected to the suction pump 209. In some embodiments, the suction pump 209 can also be directly arranged at the lower end of the suction pipe 208. The sealing cover 206 is arranged on the upper end of the seepage pipe 213. The sealing cover 206 is provided with a first perforation corresponding to the suction pipe 208. The sealing cover 206 is also provided with a second perforation corresponding to the air exchange pipe 207. The air exchange pipe 207 is used for air exchange inside the seepage well 2 to ensure that the seepage water can be smoothly pumped out.

[0032] The upper end of the air exchange pipe 207 is bent in an inverted U shape. In this way, dust or rainwater can be prevented from entering the seepage pipe 213 through the air exchange pipe 207. The sealing cover 206 is a circular plate. The sealing cover 206 is fixed to the flange on the upper end of the seepage pipe 213 by means of circumferentially distributed bolts. A tapered rubber plug is arranged below the sealing cover 206. The smaller end of the rubber plug has a diameter greater than the inner diameter of the seepage pipe 213. The larger end of the rubber plug is adapted to the sealing cover 206. The smaller end of the rubber plug extends into the upper end of the seepage pipe 213. A first passage and a second passage are arranged in the middle of the rubber plug and correspond to the first perforation and the second perforation, respectively. When the sealing cover 206 extrudes the rubber plug and causes the rubber plug to deform in the radial direction, the first passage and the second passage can be extruded to tightly fit the suction pipe 208 and the air exchange pipe 207, respectively. In this way, the suction pipe 208 and the air exchange pipe 207 can be extruded and sealed, and the two pipes can be fixed by friction.

[0033] A plurality of support mechanisms are arranged on the outer part of the seepage pipe 213 and are distributed along the longitudinal direction. The support mechanisms are used to support the seepage pipe 213 and avoid the influence of sedimentation on the seepage pipe 213. The support mechanisms include a support sleeve 205 and a support column 215. The support sleeve 205 is sleeved on the outer part of the seepage pipe 213. The length of the support column 215 is adapted to the radial difference between the outer wall of the seepage pipe 213 and the inner wall of the seepage well 2. A plurality of support columns 215 are uniformly distributed about the circumference of the support sleeve 205. In this application, the number of support columns 215 is four. The end part of the support column 215 is provided with an arc-shaped support plate 203 corresponding to the inner wall of the seepage well 2. In this way, the support area is increased and the support stability is ensured.

[0034] The seepage pipe 213 is multi-section, the seepage pipe 213 can be cast iron material, and is coated with an anti-rust coating, the supporting mechanism is located between two adjacent seepage pipes 213, the two adjacent seepage pipes 213 are respectively inserted into two ends of the supporting sleeve 205, the seepage pipe 213 can be slidably assembled at two ends of the supporting sleeve 205, in order to reduce the influence of tailing settlement on the seepage pipe 213, a plurality of longitudinal strip-shaped holes are arranged on the part of the seepage pipe 213 extending into the supporting sleeve 205, the strip-shaped holes can be 3-6, the supporting sleeve 205 is provided with a bolt 214 corresponding to the strip-shaped hole, the strip-shaped hole can be 2, and is symmetrically distributed about the seepage pipe 213, the supporting sleeve 205 is provided with a bolt 214 corresponding to the strip-shaped hole, the bolt 214 penetrates the two strip-shaped holes, so that the seepage pipe 213 can slide in the supporting sleeve 205, and is limited by the bolt 214, the bolt 214 can be a bolt or a pin shaft.

[0035] The seepage well 2 is provided with a conical liquid collecting groove 201 at the bottom, the liquid collecting groove 201 collects seepage liquid, a filter plate corresponding to the gravel 212 is arranged above the liquid collecting groove 201, the seepage pipe 213 extends into the liquid collecting groove 201, and a filter cover 202 located in the liquid collecting groove 201 is arranged at the lower end of the suction pipe 208, so that the seepage water can be effectively pumped by collection.

[0036] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application is within the protection scope of the pending patent claim of the present application.

Claims

1. A tailings impoundment dam for an open pit mine, characterised in that, The application relates to a tailing heap, a buffer layer and an anti-seepage layer are arranged outside the tailing heap, a first anti-seepage film is arranged inside the anti-seepage layer, a drainage ditch is arranged above the tailing heap, and a second anti-seepage film is arranged on the upper surface of the tailing heap. A plurality of seepage wells are uniformly distributed on the tailing heap, the depth of the seepage wells is matched with the stacking height of the tailing heap, a seepage pipe is arranged in the seepage well, gravel is filled between the seepage well and the seepage pipe, and a suction pipe is arranged in the seepage pipe. A suction pump is arranged, the suction pipe is connected to the suction pump, and the discharge end of the suction pump extends to the drainage ditch. A plurality of anchor rods are arranged on the buffer layer and the anti-seepage layer, the anchor rods pass through the corresponding first anti-seepage film.

2. The impervious dam for tailings of open pit mines according to claim 1, characterized in that, Grouting holes are arranged on the outer wall of the anchor rod, and the anchor rod and the corresponding buffer layer or anti-seepage layer are consolidated through grouting.

3. The impervious dam for tailings of open pit mines according to claim 2, characterized in that, A soil layer is arranged above the second anti-seepage film, and the second anti-seepage film extends upwards along the seepage pipe to the upper part of the soil layer.

4. The impervious dam for tailings of open pit mines according to claim 1, characterized in that, A stabilizing frame corresponding to the second anti-seepage film is arranged in the middle part of the seepage pipe, the stabilizing frame comprises an outer frame, a hoop and a spoke, the hoop is arranged to fix the second anti-seepage film on the outer wall of the seepage pipe through hoop fastening, the outer frame is concentrically arranged with the hoop, and a plurality of spokes are arranged between the outer frame and the hoop in a detachable mode and are uniformly distributed around the circumference.

5. The impervious dam for tailings of open pit mines according to claim 1, characterized in that, The spoke is used for fixing the outer frame and the hoop through bolts.

6. The impervious dam for tailings of open pit mines according to claim 5, characterized in that, A plurality of seepage ports are uniformly arranged on the middle and lower parts of the outer wall of the seepage pipe, a conical liquid collecting groove is arranged at the bottom of the seepage well, the seepage pipe extends into the liquid collecting groove, and a filter cover is arranged at the lower end of the suction pipe.

7. The impervious dam for tailings of open pit mines according to claim 1, characterized in that, ​

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