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Development and Testing Results of Output Torque Indicator for Underground Mine Roof Bolting Machine.

Authors
Brest Van Kempen-CJH; Sweet-RM
Source
For Reference Only At Bureau Libraries :197 pages
Link
NIOSHTIC No.
10002486
Abstract
The objective of this investigation was to provide thrust and torque control and visual output torque readout systems to an existing mine roof bolting machine and to test the consistency of torques obtained under actual field conditions. A Lee Norse TD1 roof bolter was modified by adding a simple torque sensing device to the drill rotation mechanism and a pneumatic logic control circuit that measures torque and controls the hydraulic circuit to the rotation motor. The modification controls and indicates the final installation torque of mine roof bolts. Over 5,000 mechanical roof bolts were installed in an operating coal mine. The installed torque of these bolts were within an error band (standard deviation) of 8 pct.
Publication Date
19780101
Document Type
CP; Final Contract Report;
Fiscal Year
1978
NTIS Accession No.
NTIS Price
Identifying No.
OFR 131-82
NIOSH Division
SRC;
Source Name
For Reference Only At Bureau Libraries
Performing Organization
Envirotech Corp.
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