Waving Rip Lines for Sloping Surface Erosion Control
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Solution Overview
Problem
Straight rip lines on mining waste dumps can lead to erosion due to water accumulation and overflow, as they create large catchment areas that can breach and cause significant water volume increases, destabilizing the landform.
Innovation Solution
Forming waving rip lines with alternating peaks and troughs across the sloping surface, where each trough forms a separate catchment area, reducing the volume of water that can overflow and directing it to adjacent rip lines, thereby minimizing erosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If straight rip lines are formed across the sloping surface, then the landform can be stabilized with a predetermined gradient, but water accumulates in large catchment areas and overflows causing erosion
Solution Approach 1:
The rip lines are segmented into alternating peaks and troughs, creating multiple small catchment areas in the troughs instead of one large continuous catchment area. This segmentation prevents water accumulation from spanning the entire rip line length, reducing overflow volume and erosion potential while maintaining landform stability.
Solution Approach 2:
The rip lines are formed with a wave-like curvature featuring alternating peaks and troughs instead of being straight. This curvature creates the segmented catchment areas in the troughs and directs water flow along the contoured path, reducing direct downhill overflow and minimizing erosion while preserving the stabilizing function of the rip lines.
2Reliability
If rip lines are formed at constant zero grade, then water flow is blocked effectively, but large volumes of water are stored and can breach the rip line causing erosion
Solution Approach 1:
The constant zero grade rip line is segmented into multiple small zero-grade sections separated by peaks and troughs. Each trough forms a small localized catchment area that can store limited water volume, preventing the accumulation of large water volumes that would breach the entire rip line and cause erosion.
Solution Approach 2:
Different sections of the rip line have different local characteristics - troughs are designed as catchment areas with specific storage capacity, while peaks act as separation elements. This local differentiation allows water to be contained in small controlled volumes rather than large uncontrolled volumes, maintaining flow control reliability while reducing breach risk.
Data Source
AI summary
A method and apparatus of forming two or more waving rip lines across a sloping surface, wherein the rip lines are formed at substantially right angles to the downward direction of the sloping surface and have a plurality of peaks and troughs. The troughs form catchment areas for water and the peaks separate the troughs limiting the amount of water stored in the catchment areas. Each of the rip lines can be substantially parallel with each other or offset relative to an adjacent rip line. The plurality of waving rip lines contribute to the stability of the landform, long term conservation and maintenance of the landform, and thereby encourage establishment and growth of vegetation in the remediation process.