The value of decelerometer testing

Abstract Decelerometer testing of a rigid guide system in a mine shaft provides useful information to operating and maintenance people. High acceleration/deceleration rates can lead to high maintenance costs to both conveyances and shaft and can also present an operating risk. Possible disastrous results in the shaft have been avoided by restricting the maximum conveyance speed until the shaft and/or conveyance problems have been solved.
The test instrument is a valuable aid especially during cornmissioning or updating of a hoisting installation. High acceleration/deceleration rates also lead to reduced hoist rope life. During the past fourteen years, a total of 15,000,000 feet of testing was performed in 74 assorted shaft compartments.
Based on this experience, it is possible to establish acceptable conveyance maximum speeds provided that all other conditions in the shaft compartment are normal. The body of the paper will present examples of several tests made under actual operating conditions.
Keywords: Equipment, Maintenance, Decelerometers, Decelerometer testing, Shaft guide alignment, Hoist ropes, Hoist braking systems
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Publication: CIM Bulletin
Author(s): YVES AYMONG
Keywords: Equipment, Maintenance, Power transformers, Visual inspection, Oil analysis, Cooling fans, Thermography
Issue: 871
Volume: 77
Year: 1984
Text
Summary: Methane emission and the desorption characteristics of vertical borehole coal samples of Greenhills multiple seams in the vicinity of Elkford, British Columbia were investigated. Three vertical boreholes at depths of 335 m, 380 m and 395 m were drilled along the west wall of an active open pit mine and 44 core samples from various coal seams were obtained for desorption studies.
The results are presented in three tables and illustrated with six figures. The methane content was found to...
Publication: CIM Bulletin
Author(s): K.K. FENG, K.C. CHENG, R. AUGSTEN
Keywords: Environmental control, Ventilation, Methane, Coal seams, Greenhills Mine
Issue: 871
Volume: 77
Year: 1984
Text
Summary: Data for underground mine-hoist ropes determined in the Ontario Special Rope Tests were obtained, encoded and analyzed statistically. Prior to refined statistical analyses, these data were subjected to characterization studies and preliminary analyses to allow trends to emerge that could be used to guide and facilitate the refined analysis. The data were characterized by determining distributions for a wide range of variables including remaining strength, service life in terms of time and...
Publication: CIM Bulletin
Author(s): RICHARD L JENTGEN, RICHARD C. RICE, GRANT L ANDERSON
Keywords: Equipment, Maintenance, Wire ropes, Mine-hoist ropes, Underground mines, Ontario Special Rope Tests
Issue: 871
Volume: 77
Year: 1984
Text
Summary: An alternative to building new copper smelters, because of either stringent environmental regulations or in order to expand current plant capacity, could be achieved through the retrofitting of old reverberatory furnaces by making use of tonnage oxygen. The CONTOP technology offers unique advantages over other techniques for this purpose, especially regarding substantial reduction in both, capital and operating costs. This is possible to achieve since the reverb throughput could be largely...
Publication: CIM Bulletin
Author(s): N. TORRES
Keywords: Reverb furnaces, Copper smelting, Contop process, Cyclone smelting
Issue: 871
Volume: 77
Year: 1984
Text
Summary: Surface coal mining production from Elk Valley and area in southeastern British Columbia began in 1913. Since 1970, five open-pit mines have been put into production: Westar Mining's Harmer and Greenhills Operations; Fording Coal's Fording River Operation; Byron Creek Collieries' Coal Mountain Mine and Crows Nest Resources' Line Creek Operation.
In 1983 these mines produced 14.9 million tonnes of raw coal at an average strip ratio of 4.9 bank cubic metres of waste to 1.0 tonne of raw coal....
Publication: CIM Bulletin
Author(s): R.S. NICHOLS
Keywords: Elk Valley Mines, Surface coal mining, Hangingwall waste removal, Seam cleaning, Coal removal, Footwall waste removal
Issue: 871
Volume: 77
Year: 1984
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