Auxiliary Transportation and Support System for Rapid Coal Mine Excavation
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Solution Overview
Problem
Current support equipment and technologies in rapid coal mine excavation systems are inadequate, particularly when combined with bridge-type transfer machines, as they result in low cutting efficiency, excessive support time, labor intensity, and safety hazards, failing to meet the demands of high-yield and high-efficiency fully mechanized mining.
Innovation Solution
An auxiliary transportation and support system that integrates crushing, transportation, and bolt and anchor cable support functions, featuring a crushing and transportation device with a traveling mechanism, roof bolt and side bolt support devices, and an expandable retractable belt conveyor, allowing for rapid full-cross section bolt and anchor cable support operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the excavating-anchoring machine operates at high cutting efficiency, then coal production increases, but larger coal pieces are produced requiring longer transportation belts and more frequent extensions
Solution Approach 1:
The patent combines the crushing device with the transfer machine to form an integrated crushing and transfer system. The crushing device is installed on the transfer machine chassis, allowing coal to be crushed and transported in a single integrated unit, eliminating the need for separate crushing and transfer operations.
Solution Approach 2:
The crushing device performs preliminary crushing of coal pieces before they enter the transportation belt. By crushing coal pieces in advance on the transfer machine, the system prevents the formation of oversized coal pieces that would require frequent belt extensions, thereby reducing time loss.
2Productivity
If the excavating-anchoring machine cuts coal rapidly, then excavation speed increases, but support time becomes 10 times longer than cutting time, reducing overall boot rate
Solution Approach 1:
The patent integrates the support function into the transfer machine by installing drilling devices on the transfer machine chassis. This allows the transfer machine to perform both coal transport and roof/support drilling operations, combining previously separate functions into one integrated system.
Solution Approach 2:
The integrated system allows continuous operation where coal is transported and supported simultaneously without interruption. The transfer machine continuously transports coal while its drilling devices continuously perform support drilling, eliminating idle time between cutting and support operations.
3Device complexity
If manually held drilling machine is used for side support, then equipment simplicity is maintained, but labor intensity increases and safety hazards occur
Solution Approach 1:
The transfer machine performs support drilling operations autonomously without requiring manual intervention. The drilling devices mounted on the transfer machine automatically drill support holes and install anchors, allowing the machine to service itself and eliminate the need for workers to manually hold drilling machines in dangerous positions.
Data Source
AI summary
An auxiliary transportation and support system used after rapid excavation is provided. The system includes a crushing and transportation device, a roof bolt support device and a side bolt support device. The crushing and transportation device includes a traveling mechanism, a transportation device, a receiving hopper, and a crushing device. The traveling mechanism is located at a bottom of the crushing and transportation device. A chassis is arranged above the traveling mechanism. The transportation device is mounted on the chassis along a traveling direction of the traveling mechanism. The receiving hopper and the crushing device are both arranged on the transportation device. The roof bolt support device includes a roof bolter, a middle roof bolter and a horizontally telescopic arm which is arranged at a head end of the chassis. The roof bolter is coupled to a movable stretching end of the horizontally telescopic arm.