Application of Geosynthetics in Anti-seepage Project of Gold Mine and Tailings

    Application of Geosynthetics in Anti-seepage Project of Gold Mine and Tailings--Hdpe geomembrane,geotextile,Sodium Bentonite Waterproof Blanket and Composite drainage net

Background introduction

A variety of chemicals added in the process of gold production are serious sources of industrial pollution, among which the most prominent pollutants are mercury and cyanide. For wastewater containing mercury and cyanide, it must be treated to meet the standard before it can be recycled or discharged. In the process of wastewater treatment, once leakage occurs, it will cause serious pollution to soil and groundwater. Therefore, extremely high requirements are put forward for the anti-corrosion and anti-seepage performance of the wastewater pool.

A tailings pond is a place composed of dams to intercept valley mouths or enclosures and used to store metal or non-metal mines for ore sorting and discharge tailings or other industrial wastes. The tailings pond is generally composed of intercepting dam, anti-seepage barrier system, drainage system, etc., and a large amount of tailings or waste slag are filled in the pond. In the anti-seepage barrier system of tailings pond, the use of composite geomembrane can prevent the occurrence of mining pollution accidents. In the drainage system, the use of composite drainage boards, geotechnical drainage pipes, geotextiles and other filtration and drainage components, combined with drainage wells and drainage operations around the reservoir area, will be able to reduce the moisture content of tailings, control the water level in the reservoir, and improve the tailings reservoir. overall stability.

product description

1.geomembrane 

The full name of HDPE geomembrane is "high density polyethylene geomembrane", which has excellent resistance to environmental stress cracking, low temperature resistance, anti-aging, corrosion resistance, and a large operating temperature range (-60--+60) and long It has a service life of 50 years and is widely used in anti-seepage projects of domestic waste landfills, solid waste landfills, sewage treatment plants, artificial lakes, tailings treatment and other anti-seepage projects. As a new type of anti-seepage material, it is used in combination with geotextiles and other geotechnical materials. In the field of gold mine geotechnical anti-seepage, since its application, the anti-seepage effect has been good and has been well received by the industry.

HDPE geomembrane Recommended specifications and models

geomembrane thickness:1.5mm or 2.0mm

geomembrane size:5.8*50m（hdpe geomembrane Can be customized according to project requirements）

Executive standard：ASTM GRI GM13

2.Filament nonwoven Geotextile

Filament geotextiles are made of PET polyester chips and are laid out into a net shape through different equipment and processes, and then different fibers are intertwined with each other through acupuncture and other processes, and the fabrics are normalized by mutual entanglement. It has good mechanical function, good water permeability, anti-corrosion, anti-aging, with isolation, anti-filtration, drainage, protection, stabilization, reinforcement and other functions, can adapt to uneven base, can resist construction external force damage, small creep, The original function can still be maintained under long-term load. The non-woven geotextile is used in the anti-seepage structure of the geomembrane to prevent the geomembrane from being punctured by sharp objects and to prevent the geomembrane from losing its due function due to damage.

geotextile Recommended specifications and models

geotextile specifications:600 g/㎡
size: 5.8*50m 

3.Sodium Bentonite Waterproof Blanket

GCL sodium bentonite waterproof blanket is made of bentonite sandwiched between geotextiles or connected to geomembrane. Its outstanding feature is that it can self-repair damaged parts and 3mm internal cracks by using the characteristics of volume expansion of 13-16 times when high-performance concrete reacts with water. At the same time, it has permanent waterproof effect, high strength, high elongation, corrosion resistance and resistance. impact. The performance indicators of sodium bentonite waterproof blanket (GCL) in the anti-seepage project of the landfill should meet the requirements of the current national standards.

GCL Recommended specifications and models

specifications：4500g/㎡
 size:  5.8*30m

4. Composite drainage net

A composite drainage network with a three-dimensional mesh core should be used for the groundwater drainage system, the closure exhaust layer, and the drainage layer. The geocomposite drainage network used for anti-seepage system engineering shall meet the following requirements:

Recommended specification and model: width 2m-4m, length customizable; Net core thickness: 4.0mm-8.0mm