Modular Edge Protection Bund with Vertical Barrier
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Solution Overview
Problem
Conventional rock bunds in open-pit mines are ineffective at preventing high-speed vehicle collisions and occupy valuable space, as they are shallow and wide, allowing vehicles to easily ride over or crash through, and their design reduces the road or ramp width.
Innovation Solution
A modular edge protection safety bund system with vertically extended barrier walls and wedge-shaped support webs, connected by flexible members, forming a more substantial and stable rock barrier that resists vehicle impact by increasing the volume of rock required to be displaced, and using brightly colored, high-visibility plastics or concrete modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional rock bund is used with shallow incline sides, then the bund can be constructed with standard angle of repose material, but the bund allows vehicles to ride over or crash through at high speed
Solution Approach 1:
The bund system is divided into modular sections (concrete barriers, rock chambers, and fill zones) that can be constructed and positioned independently. Each module contributes to the overall vertical barrier effect, with the concrete barrier providing the steep front face and the rock chambers providing rear support.
Solution Approach 2:
The bund structure uses asymmetric geometry with a steep vertical front face (nearly 90 degrees) to prevent vehicle override, while the rear side has a gentler slope for stable construction. This asymmetric shape creates the necessary barrier height without requiring shallow inclines on both sides.
2Reliability
If a conventional rock bund is constructed to sufficient height, then vehicle protection is improved, but the bund occupies substantial area and reduces road or ramp width
Solution Approach 1:
The solution transitions from a two-dimensional spread-out rock pile to a three-dimensional modular structure with vertical concrete barriers and stacked rock chambers. This vertical stacking achieves the required protection height without extending the horizontal footprint, thereby preserving road width.
Solution Approach 2:
The rock chambers are nested within and behind the concrete barrier modules, with each chamber positioned to interlock with adjacent modules. This nested arrangement maximizes the use of vertical space and minimizes horizontal occupation, creating a compact yet effective barrier.
3Reliability
If a vertical barrier wall is constructed to prevent vehicle override, then collision resistance is improved, but the structure requires substantial material and construction complexity
Solution Approach 1:
The vertical barrier is segmented into standardized concrete modules that can be manufactured off-site and assembled in place. Each module is a self-contained unit with integrated rock chambers, simplifying construction and reducing on-site labor requirements despite the vertical design.
Solution Approach 2:
The concrete barrier, rock chambers, and drainage features are merged into a single integrated modular unit. This combination eliminates the need for separate construction of multiple components, reducing overall structural complexity while maintaining the vertical barrier effect.
Data Source
Figure 1a~1b
Figure 2
AI summary
An edge protection safety bund system (10) for use in connection with a rock bund made of rock fill. The edge protection safety bund system (10) comprises a bund module (12) having a barrier wall (14) and a base plate (16). The bund module (12) is preferably one of a plurality of bund modules (12) arranged side by side to form an extended barrier wall (14). The barrier wall (14) of each module (12) extends substantially perpendicularly upwards from the base plate (16), and a support web (18) extends at an angle from a rear face of the barrier wall (14) to an upper surface of the base plate (16). In use, when rock fill is dumped onto the rear of the bund modules (12), and allowed to flow back to its natural angle of repose behind the barrier walls (14), it creates a rock bund (20) with a front face formed by the extended barrier wall (14).