Self-Powered Rail Cars for Steep Grade Mining Transport

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Solution Overview

Problem

Current methods for moving bulk materials in mining and similar industries face challenges such as high costs, maintenance issues, and limited flexibility, particularly when dealing with steep grades and changing infrastructure like advancing mine faces.

Innovation Solution

A rail-based system featuring self-powered rail cars with multiple powered axles, remote control capabilities, and a combination of propulsion sources (on-board engines, energy storage, and grid power) to efficiently transport materials over varying terrain and grades, including steep inclines.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If traditional rail systems with locomotives pulling unpowered cars are used, then fuel efficiency is improved due to low rolling resistance, but the system is limited to grades of 3 to 7 degrees due to track adhesion considerations

Engineering Contradiction:

Improvefuel efficiencyVSAvoidgrade negotiation capability

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

The train is divided into self-powered modules where each car carries its own propulsion system. This segmentation allows each car to independently generate tractive effort, enabling the system to overcome adhesion limitations on steep grades while maintaining the fuel efficiency benefits of rail transport.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each rail car is equipped with its own power source (engine, energy storage system, or grid power connection) that provides propulsion without requiring external assistance from a locomotive. This self-service capability enables each car to independently negotiate steep grades and maintain movement autonomously.

Inventive Principle:

Principle #25Self-service

2Productivity

If conveyor systems are used to move bulk materials, then operational continuity is improved, but maintenance requirements increase significantly and can cause serious production delays

Engineering Contradiction:

Improveoperational continuityVSAvoidmaintenance requirements

Core Design Contradiction:

ProductivityVSEase of repair

Solution Approach 1:

The conveyor system is replaced with discrete, modular self-powered rail cars that can operate independently. If one car experiences mechanical issues, others can continue operating, eliminating the single-point-failure problem inherent in continuous conveyor systems and reducing overall maintenance impact on production.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system transitions from a continuous mechanical conveyor to discrete rolling stock with multiple power sources. This parameter change from continuous to modular operation allows for easier maintenance, as individual cars can be serviced without shutting down the entire transport system, thereby improving ease of repair while maintaining productivity.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If trucks are used for material transport, then routing flexibility is improved, but operating costs increase due to driver requirements, specialty tires, and fuel consumption

Engineering Contradiction:

Improverouting flexibilityVSAvoidoperating costs

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

Each rail car is equipped with autonomous control systems and power sources that eliminate the need for human drivers. The cars can navigate and operate independently, reducing labor costs while maintaining routing flexibility through programmable control and adaptive navigation capabilities.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system replaces mechanical truck operations with automated rail-based vehicles. This substitution eliminates costs associated with drivers, specialty tires, and high fuel consumption while maintaining routing flexibility through programmable control systems that can adapt to changing operational requirements.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Productivity

If slurry transport systems are used, then transport capability for suitable ores is improved, but the system requires crushing of ore or waste rock and cannot operate near the working face

Engineering Contradiction:

Improvetransport capabilityVSAvoidsystem configuration requirements

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The invention extracts the crushing and slurry preparation requirements from the transport system. By using self-powered rail cars with enclosed cargo holds, the system can transport solid ore and waste rock directly from the working face without requiring preliminary crushing or slurry formation, thereby simplifying system configuration while maintaining transport capability.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS8428796B2Rail conveyance system for mining

Publication Date: 2013.04.23 RHT RAIL HAUL TECH INC

AI summary

A rail-based system is disclosed for moving materials and is applicable to a number of industries. The invention describes a system of automated self-powered rail cars operating independently to transport material such as ore from a work face in a mine or cargo from a marine port to a major transportation hub.