阅读说明：本技术 一种双向渗透反向铺设排渗棱体筑坝方法 (Method for building dam by bidirectional permeation and reverse laying of seepage drainage arrises ) 是由 付文堂 关士良 张历声 于 2019-10-18 设计创作，主要内容包括：本发明公开了一种双向渗透反向铺设排渗棱体筑坝方法,步骤有将柔性透水筒沿干滩自然坡度向坝内铺设；沿纵向柔性透水筒下方从坝外向库内铺设导水管及接头,形成导水系统；在透水筒内穿入排渗管,与导水系统连接；将尾矿砂注入到透水筒内,纵向柔性透水筒形成纵向排渗棱体；将横向柔性透水筒沿堆积坝平行铺设；在横向柔性透水筒内穿入排渗管并将排渗管出口与纵向棱体的排渗管连接；将尾矿砂注入到横向柔性透水筒内,尾矿砂中的细尾矿和水通过内部排渗管流入纵向排渗棱体的排渗管内排出,横向柔性透水筒形成横向排渗棱体作为尾矿库透水堆积坝；纵向棱体间用尾矿砂充填,形成干滩。本方法施工简单、稳定性好、强度高、筑坝快速、成本低。(The invention discloses a method for damming a drainage ridge body by bidirectional permeation and reverse laying, which comprises the steps of laying a flexible permeable cylinder into a dam along the natural gradient of a dry beach; laying a water guide pipe and a joint from the outside of the dam to the inside of the reservoir along the lower part of the longitudinal flexible water permeable cylinder to form a water guide system; a seepage drainage pipe is penetrated into the water permeable cylinder and is connected with a water guide system; injecting tailing sand into a water permeable cylinder, and forming a longitudinal seepage drainage prism by a longitudinal flexible water permeable cylinder; laying transverse flexible permeable cylinders in parallel along a stacking dam; penetrating a drainage pipe into the transverse flexible permeable cylinder and connecting the outlet of the drainage pipe with the drainage pipe of the longitudinal prism; injecting tailing sand into a transverse flexible permeable cylinder, allowing fine tailings and water in the tailing sand to flow into a drainage pipe of a longitudinal drainage prism through an internal drainage pipe and be discharged, and forming a transverse drainage prism by the transverse flexible permeable cylinder to serve as a permeable accumulation dam of a tailing pond; the longitudinal prisms are filled with tailing sand to form dry beach. The method has the advantages of simple construction, good stability, high strength, quick damming and low cost.)

1. A method for damming a bidirectional permeation and reverse laying seepage drainage prism comprises the following steps:

① laying flexible water-permeable cylinders along the natural slope of dry beach into dam;

② laying water guide pipes and joints from the outside of the dam to the inside of the tailings pond along the lower part of the longitudinal flexible water permeable cylinder to form a water guide system;

③ penetrating into the longitudinal flexible permeable tube to connect with the water guide system;

④, injecting tailing sand into a longitudinal flexible permeable cylinder, allowing fine tailings and water in the tailing sand to enter a water guide system through an internal drainage pipe and discharge, and forming a longitudinal drainage prism by the longitudinal flexible permeable cylinder;

⑤ laying transverse flexible water permeable cylinders in parallel along the accumulation dam;

⑥ penetrating the drainage pipe into the transverse flexible permeable cylinder and connecting the outlet of the drainage pipe with the drainage pipe of the longitudinal prism;

⑦, injecting tailing sand into a transverse flexible permeable cylinder, allowing fine tailings and water in the tailing sand to flow into a drainage pipe of a longitudinal drainage prism through an internal drainage pipe and be discharged, and allowing the transverse flexible permeable cylinder to form a transverse drainage prism to serve as a permeable accumulation dam of a tailing pond;

⑧ the longitudinal prisms are filled with tailings to form dry beach.

2. The method as claimed in claim 1, wherein the number and the laying distance of the drainage pipes in the flexible water permeable cylinder are determined according to the actual water content and the penetration radius of the tailings sand in steps ③ and ⑥, and the filter screen diameter is determined by matching the filter screen with the tailings particle size.

3. The method of claim 1, wherein the drainage pipe is flanged to the flexible water-permeable cylinder in steps ③ and ⑥, and exposed pipe heads are retained at both ends of the drainage pipe.

Technical Field

The invention relates to a damming method for damming a tailing reservoir sub-dam of a high-water-content, fine-particle and solid waste stockpiling and high-concentration and fine tailing upstream damming, in particular to a damming method for bidirectionally permeating and reversely paving a seepage drainage prism.

Background

Most mine tailings are conveyed by pipelines, a tailing pond is dammed by an upstream type, the negative 200 meshes of tailing particles of nonferrous metals and gold mines reach more than 80% due to the mineral separation requirement, the direct damming by the tailings is difficult, most mine tailings are dammed by rotational flow bagging or external material damming, and the damming cost is high. When the sub-dam is constructed, the sub-dam foundation is located on a dry beach, fine tailing particles cannot be discharged to form the dry beach, the consolidation of a pile body is slow, the foundation needs to be reinforced by using external materials, a large amount of storage capacity is occupied, and effective resources are wasted. The strength of the dry beach is weak, the cyclone bagging sub-dam and the foreign materials used for reinforcing the foundation extrude the interior of the dry beach to deform, the whole tailing pond is stable and unbalanced, and deformation and dam break are easily caused.

Disclosure of Invention

The invention aims to provide a method for damming a two-way permeation and reverse laying drainage arris body to overcome the defects in the prior art.

The technical scheme proposed for achieving the purpose is as follows:

a method for damming a bidirectional permeation and reverse laying seepage drainage prism comprises the following steps:

① laying flexible water-permeable cylinders along the natural slope of dry beach into dam;

② laying water pipes and joints from outside the dam to inside the dam at specified angle and gradient to form a water guide system;

③ penetrating into the longitudinal flexible permeable tube to connect with the water guide system;

④, injecting tailing sand into a longitudinal flexible permeable cylinder, allowing fine tailings and water in the tailing sand to enter a water guide system through an internal drainage pipe and discharge, and forming a longitudinal drainage prism by the longitudinal flexible permeable cylinder;

⑤ laying transverse flexible water permeable cylinders in parallel along the accumulation dam;

⑥ penetrating the drainage pipe into the transverse flexible permeable cylinder and connecting the outlet of the drainage pipe with the drainage pipe of the longitudinal prism;

⑦, injecting tailing sand into a transverse flexible permeable cylinder, allowing fine tailings and water in the tailing sand to flow into a drainage pipe of a longitudinal drainage prism through an internal drainage pipe and be discharged, and allowing the transverse flexible permeable cylinder to form a transverse drainage prism to serve as a permeable accumulation dam of a tailing pond;

⑧ the longitudinal prisms are filled with tailings to form dry beach.

Further, in the step ③ and the step ⑥, the number and the laying distance of the drainage pipes in the flexible water permeable cylinder are determined according to the actual water content and the permeation radius of the tailing sand, and the filter screen diameter is determined by matching the filter screen with the tailing particle size.

Further, in the step ③ and the step ⑥, the drainage pipe is connected with the flexible water permeable cylinder by a flange, and two ends of the drainage pipe are exposed outside pipe heads with a certain length.

The invention has the beneficial effects that:

1. through the matching of the pore diameter of the filter screen of the drainage and seepage pipe in the prism and the particle diameter of the tailings, the superfine tailings are discharged from the prism through the drainage and seepage pipe in the prism, and coarse particles are left in the prism, so that the prism is not classified by a cyclone when being filled with the tailings, and the damming cost is reduced.

2. Fill tailing moisture and follow the arris outer wall and arrange the infiltration pipe and flow out fast, lose moisture fast in the arris body with great ease, concretion fast forms effective dry beach, realizes that heap body or tailing storehouse are dammed fast, rise fast.

3. The seepage water in the reservoir seeps to the water guide system through the longitudinal seepage drainage arrises and flows out of the dam body. The bidirectional permeation function of the seepage drainage arris body is realized, the ascending of a later damming infiltration line is controlled, and the anti-slip stability of the dam body is improved.

4. The longitudinal seepage drainage pipe and the longitudinal cylindrical flexible permeable material have higher tensile strength, form a dam body tie rib in the dam body, and improve the overall strength of the dam body.

The method has the characteristics of good stability, high strength, simple construction, quick damming, low cost and the like, is particularly suitable for stockpiling of granular fine solid wastes with high water content and is also a tailing reservoir damming method for high-concentration fine tailing upstream damming.

Drawings

FIG. 1 is a top view of the method of damming a bi-directional permeable reverse-laying drainage arris of the present invention.

FIG. 2 is a cross-sectional view of the method of damming a bidirectional permeable reverse-laying drainage prism of the present invention.

1. A longitudinal flexible permeable cylinder 2, a seepage discharge pipe 3, tailing sand 4, a transverse flexible permeable cylinder 5 and a water guide system.

Detailed Description

A method for damming a bidirectional permeation and reverse laying seepage drainage prism comprises the following steps:

step one, paving a longitudinal flexible permeable cylinder 1 into a dam along the natural gradient of a dry beach;

step two, paving water conduits and joints in the reservoir from the outside of the dam according to a specified angle and gradient below the longitudinal flexible water permeable cylinder 1 to form a water guide system 5;

thirdly, penetrating a drainage pipe 2 into the longitudinal flexible permeable cylinder 1 and connecting the drainage pipe with a water guide system 5;

injecting tailing sand 3 into the longitudinal flexible permeable cylinder 1, allowing fine tailings and water in the tailing sand 3 to enter a water guide system 5 through an internal seepage discharge pipe 2 and discharge the fine tailings and the water, and forming a longitudinal seepage discharge prism by the longitudinal flexible permeable cylinder 1;

step five, laying the transverse flexible permeable cylinders 4 in parallel along a stacking dam;

step six, penetrating a drainage pipe 2 into the transverse flexible permeable cylinder 4 and connecting the outlet of the drainage pipe 2 with the drainage pipe 2 of the longitudinal prism;

step seven, injecting tailing sand into a transverse flexible permeable cylinder 4, enabling fine tailings and water in the tailing sand 3 to flow into a drainage and seepage pipe 2 of a longitudinal drainage and seepage prism through an internal drainage and seepage pipe and be discharged, and enabling the transverse flexible permeable cylinder 4 to form a transverse drainage and seepage prism to serve as a permeable stacking dam of a tailing pond;

and step eight, filling tailing sand 3 among the longitudinal prisms to form a dry beach.

On the basis of the technical scheme, the invention can be further improved as follows: furthermore, in the third step and the sixth step, the quantity and the laying distance of the seepage discharge pipes in the longitudinal flexible permeable cylinder 1 and the transverse flexible permeable cylinder 4 are determined according to the actual water content and the seepage radius of the tailing sand, and the filter diameter of the filter screen is determined by matching the filter screen with the particle size of the tailing sand.

And further, in the third step and the sixth step, the seepage drainage pipe 2 is connected with the longitudinal flexible permeable cylinder 1 and the transverse flexible permeable cylinder 4 by flanges, and two ends of the seepage drainage pipe are reserved with pipe heads exposed for a certain length.