Slope Protection
2022
Hechi, Guangxi, China
Fengshan County Government
Guangxi Zhuang Autonomous Region Geological Environment Monitoring Station
Fengshan County Liangli and Po Xiongbao Mine Rehabilitation Project Hechi, Guangxi, China
Under construction
Construction completed
pre-construction
Under construction
Construction completed
Problem
Guangxi Fengshan County Liangli and Po Xiongbao Mining Area is located in the World Geopark Nature Reserve. Cutting and excavation of the mountains on the south-eastern and south-western sides of the plant due to the expansion of mining have caused significant damage. In addition to the 44 acres of construction land left over from the past, the damaged land area is approximately 0.05 km² (75 acres). The site expansion alters surface water runoff infiltration, endangering stalactites in the caves below and increasing geological disaster risks from vibration.
Located in the Level 1 Core Protection Zone of the World Geopark, the area required ecological restoration following regional guidelines, including the Planning of Guangxi Fenshan Karst National Geopark (2020-2030) and the Regulations on the Protection of Stalactites Resources of the Guangxi Zhuang Autonomous Region (Revised in 2020).
Mining Environmental Problems:
- Zone I: High and steep rocky slopes exceeding 20m in height with slopes above 50°.
- Zone II: Gentle slopes with heights under 20m and gradients below 45°, often terraced.
- Zone III: Flat land and platforms left after mining, with slopes damaged by waste ore dumping.
Solution
The local ecological restoration strategy combines:
- Slope reduction and stabilization for steep quarry faces.
- Backfill and greening measures for flat and terraced lands.
- Ecological grid retaining walls, spray-coated substrate, and reinforced MacMat for slopes steeper than 30°, ensuring soil retention and water conservation while fostering vegetation growth.
Different zones required tailored solutions:
- Zone I: Cliff wall openings for climbing vegetation.
- Zone II: Mulching, spray-coating, and reinforced MacMat for gentle slopes, supported by retaining walls.
- Zone III: Artificial mulching and shrub planting for regreening.
Advantages of the Solution:
Reinforced MacMat combined with short gabion retaining walls ensures slope safety and stability, addressing landslide risks and promoting rapid vegetation growth.
Used Products
