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Offcat. Oscillating Full Face Cutting and Transporting System for Longwall Mining and Pillar Reclaiming.

Wisner JM; Gangal MD; Abel JF; Pariseau WG
For Reference Only At Bureau Libraries :257 pages
The oscillating full-face cutting and transporting (offcat) system for longwall and pillar reclaiming was proposed as a mining system that would make a substantial improvement in production, productivity, and safety for U.S. coal mines. The offcat system consists of several subsystems. A cutter assembly stretches across the full coal face and is powered by a reciprocating actuator in each entry gate. An armored face conveyor removes coal from the face to the section belt by a stage conveyor. Shields protect the face area from falling rock. As the face advances, an actuator in each entry pulls all of the shields forward simultaneously. No workers are at the face during operation. An initial technical and economic feasibility analysis showed that the offcat system is technically feasible and has high promise for reducing capital investment and dollars per ton cost of coal, increasing production and face productivity, and maintaining a safe working environment.
Publication Date
Document Type
CP; Final Contract Report;
Fiscal Year
Identifying No.
OFR 132-82
NIOSH Division
Source Name
For Reference Only At Bureau Libraries
Performing Organization
Ingersoll-Rand Res. Inc.
Page last reviewed: November 12, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division