Drainage device for mine ecological restoration filling slope platform

Abstract

The utility model provides a mine ecological restoration filling slope platform drainage device, and relates to the technical field of mine ecological restoration slope drainage. The structure comprises a filling slope, a soil drainage ditch, a clay layer, a drainage pipe, a geomembrane and a soil water retaining stem, a soil drainage ditch is arranged on the inner side of the slope platform; clay layers are arranged on the surfaces of the soil drainage ditches, and drainage pipes are arranged on the surfaces of the clay layers; a geomembrane is arranged on the surface of the drainage pipe, the two sides of the geomembrane extend to the platform and the slope toe, and a soil water retaining stem is arranged on the surface of the part, extending to the platform, of the geomembrane. The structure is convenient and rapid to construct, simple in structure and capable of adapting to uneven settlement deformation of the mine filling slope, water on the surface of the filling slope can be collected into the slope toe drainage ditch to be discharged in time, instability caused by surface water scouring and infiltration of the slope is prevented, vegetation damage caused by surface water is reduced, and the mine ecological restoration effect is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine ecological restoration slope drainage, and specifically relates to a drainage device for a fill slope platform which is adaptable to deformation, has a simple structure, is convenient to construct, and is easy to repair. Background Art

[0002] During mining, topsoil stripping and slag backfilling will form fill slopes of varying heights. These fill slopes are characterized by uneven rock and soil structure, a high gravel content, loose structure, good water permeability, and large settlement and deformation. Under the influence of factors such as heavy rainfall, earthquakes, and human engineering activities, they are extremely susceptible to instability, deformation, collapse, and damage, resulting in serious consequences. During mine ecological restoration, the commonly used restoration measures for such slopes are staged slope leveling and slope greening. Staged slope leveling disturbs the slope, making the rock and soil structure even looser. In the event of heavy rainfall, rainwater seeps down the slope, increasing its weight while reducing its physical and mechanical properties, leading to reduced slope stability. Rainwater scouring the slope surface can also damage juvenile vegetation on the slope surface, hindering vegetation recovery in mine ecological restoration. Currently, drainage for fill slopes in ecological restoration mostly relies on cast-in-place concrete U-shaped drains, mortar-stone U-shaped drains, and simple drains with geomembrane bottoms. However, due to the loose rock and soil structure on the slope surface and large settlement deformation, cast-in-place concrete U-shaped drains and mortar-stone U-shaped drains are easily torn, making repair difficult and expensive. Simple drains with geomembrane bottoms are easily punctured by gravel in the fill, rendering them inoperable. Therefore, in the construction of fill slopes for mine ecological restoration, the design of platform drains that adapt to fill slope deformation is crucial to the stability of the fill slope and the effectiveness of slope vegetation restoration. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a fill slope platform drainage device which is adaptable to the settlement and deformation of the fill slope in mine ecological restoration, has convenient and fast construction, simple structure and convenient repair.

[0004] To solve the above-mentioned technical problems, the present invention provides a technical solution: a drainage device for a mine ecological restoration fill slope platform, comprising a mine ecological restoration fill slope, an earthen drainage ditch, a clay cushion layer, a drainage pipe, a geomembrane, and an earthen water retaining stem. An earthen drainage ditch is set on the platform at the foot of the slope after the slope is leveled. The surface of the earthen drainage ditch is paved with a clay layer, the surface of the clay layer is paved with a drainage pipe, the surface of the drainage pipe is paved with a geomembrane, both sides of the geomembrane extend to the platform or the foot of the slope, and earthen drainage stems are set on the extended portion of the geomembrane platform, and the earthen drainage stems press the part of the geomembrane extending to the platform.

[0005] Furthermore, the fill slope is a slope formed by filling slag and waste rock during the mining process. The slope is divided into multiple levels by leveling the slope, and the width of the slope platform is not less than 1.0m.

[0006] Furthermore, the earthen drainage ditch is arranged on the inner side of the slope platform, that is, at the foot of the graded slope. The drainage ditch is set in a semicircular shape to level the surface and remove broken stones and boulders that are more than 5 cm in height.

[0007] Preferably, the earthen drainage ditch is provided with a longitudinal slope of 3%, to ensure that the water in the ditch can be discharged smoothly.

[0008] Furthermore, the clay layer is laid on the surface of the earthen drainage ditch with a thickness of 10 cm. After laying, the surface of the clay layer is leveled to facilitate close contact with the drainage pipe;

[0009] Furthermore, the drainage pipe is laid on the surface of the clay cushion layer, and the upper end is flush with the top of the earthen drainage ditch;

[0010] Preferably, the drainage pipe is a semicircular HDPE double-wall corrugated pipe, which is a flexible pipe that can adapt to the uneven settlement and deformation of the slope, is easy to carry, and is quick and convenient to construct.

[0011] Furthermore, the geomembrane is laid on the surface of the drainage pipe, and both sides of the geomembrane extend toward the platform and the slope foot, with an extension length of 30 cm.

[0012] Preferably, the thickness of the geomembrane is 1 mm.

[0013] Furthermore, the soil water retaining bar is arranged above the extension part of the geomembrane platform to press the geomembrane extending to the platform.

[0014] Preferably, the soil water retaining ridge is composed of clay, arranged in a trapezoidal shape, and is manually compacted.

[0015] The beneficial effects of the present invention are as follows: the platform drainage ditch for the mine ecological restoration fill slope is formed by setting a semicircular earthen drainage ditch at the foot of the slope, laying a clay layer, and then laying a flexible semicircular HDPE double-wall corrugated pipe and a geomembrane, and setting an earthen water retaining stem on the platform side, thereby forming a drainage ditch that adapts to the deformation of the fill slope and is convenient for repair. It can effectively collect surface water on the slope and quickly drain it away, reducing the amount of surface water infiltration along the slope and the amount of scouring along the slope surface, preventing the slope from becoming unstable due to the increase in weight of the slope rock and soil or the decrease in physical and mechanical properties, and reducing the damage to the juvenile vegetation in the mine ecological restoration caused by the scouring of the surface by surface water. The present invention has a simple structure, low cost, and convenient construction, and has a good application effect in the drainage of mine ecological restoration fill slopes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side cross-sectional schematic diagram of the utility model;

[0017] Figure 2 It is a longitudinal sectional schematic diagram of the utility model;

[0018] As shown in the figure: 1. Fill slope, 2. Semicircular earth drainage ditch, 3. Clay layer, 4. Semicircular drainage pipe; 5. Geomembrane, 6. Earthen water retaining bar, 7. Longitudinal slope of ditch. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 As shown, the drainage device of the fill slope platform of the present invention is arranged on the inner side of the fill slope platform, including a fill slope 1, a semicircular earth drainage ditch 2, a clay layer 3, a semicircular drainage pipe 4, a geomembrane 5, an earth water retaining ridge 6, and a longitudinal slope of the ditch 7; a semicircular earth drainage ditch 2 is artificially excavated on the inner side of the fill slope 1 platform; the surface of the semicircular earth drainage ditch 2 is paved with a clay layer 3, and the surface of the clay layer 3 is paved with a semicircular drainage pipe 4; the surface of the semicircular drainage pipe 4 is paved with a geomembrane 5; one side of the geomembrane 5 extends into the fill slope 1, and the other side extends to the slope platform; the geomembrane extends to the platform side and an earth water retaining ridge 6 is provided to press the top.

[0021] Set up earthen drainage ditches at the inner slope foot of the platform. To ensure close contact between the drainage pipe and the earthen drainage ditch after laying, the earthen drainage ditch should be set up in a semicircular shape according to the shape of the drainage pipe. The surface of the earthen drainage ditch should be manually compacted and leveled, and any protruding rocks with a height greater than 5 cm should be removed. The earthen drainage ditch should be set up with a slope ratio of 3% along the longitudinal direction to ensure smooth drainage.

[0022] By laying a clay layer 3 on the earthen drainage ditch 2, the ditch bottom can be leveled, which facilitates the laying of the semicircular earthen drainage pipe 4 and reduces the gap at the contact between the semicircular earthen drainage pipe 4 and the clay layer 3. It can also prevent some surface water from seeping along the ditch bottom to a certain extent, causing ditch bottom settlement deformation or slope instability.

[0023] The function of the semicircular drain pipe 4 is to drain surface water that has collected on the slope and reached the platform's earthen drainage ditch, preventing it from seeping down the slope and scouring. The design of the drain pipe must consider both drainage effectiveness and its adaptability to the deformation and settlement of the fill slope. The preferred semicircular drain pipe is HDPE double-wall corrugated pipe. HDPE double-wall corrugated pipe has a smooth inner wall, a large flow rate, corrosion resistance, zero leakage, and good flexibility. It can adapt to uneven settlement and deformation of the fill, has a long service life, is easy to construct, and is inexpensive. Its corrugated, zigzag outer surface contributes to its stability.

[0024] To prevent surface water from leaking along the sides of the semicircular drain pipe 4, a geomembrane 5 is laid on its surface. The geomembrane 5 extends 30 cm on each side, extending to the interior of the slope foot on the slope foot side and to the platform surface on the platform side. The geomembrane 5 is a flexible polymer material with excellent anti-seepage properties, strong extensibility, high adaptability, and excellent corrosion, low-temperature, and frost resistance.

[0025] The functions of the earthen drainage ridge 6 are: first, to press the geomembrane 5 to ensure the water-proof effect of the geomembrane 5; second, to act as a water barrier to prevent the overflow water from infiltrating and eroding along the platform slope when the water in the drainage ditch overflows.

[0026] Taking into account the economy and drainage effect, the optimal thickness of the clay layer 3 is 10 cm, the thickness of the geomembrane 5 is 1 mm, and the height of the earthen water retaining ridge 6 is 15 cm.

[0027] The above description is merely a preferred embodiment of the present invention and does not constitute any other limitation to the present invention. Any person skilled in the art may utilize the above-disclosed technical content to modify or modify the above-disclosed technical content into equivalent embodiments for application in other fields. However, any simple modification, equivalent variation, or modification of the above-disclosed embodiments based on the technical essence of the present invention that does not deviate from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A drainage device for a mine ecological restoration fill slope platform, characterized in that: include: Fill slopes are formed by filling slag and waste rock during the mining process. The slopes are divided into multiple levels by leveling, and fill platforms are formed between the slopes. Earthen drainage ditch, which is set on the inner side of the fill slope platform, that is, at the foot of the graded slope. The earthen drainage ditch is set in a semicircular shape, and the surface should be leveled. The earthen drainage ditch is set along the longitudinal direction at a certain slope to ensure smooth drainage; A clay layer, the clay layer being arranged on the upper part of the earthen drainage ditch and having a uniform laying thickness; A drainage pipe is arranged on the surface of the clay layer. The drainage pipe is a double-walled corrugated pipe adapted to the uneven settlement and deformation of the fill. The upper end of the drainage pipe is flush with the top of the earthen drainage ditch. A geomembrane is laid on the surface of the drainage pipe, with both sides of the geomembrane extending toward the platform and the slope foot, with the slope foot side extending to a certain depth inside the slope foot, and the platform side extending to a certain length from the platform surface; The soil water retaining bar is arranged above the extension part of the geomembrane platform to press the geomembrane extending to the platform.

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