Abstract
The shaft hoist assembly is the base of underground mining plant. Its efficiency and correct operation is subject to restrictive legal regulations and is controlled on a daily visual assessment by shaft crew and energomechanics. In addition, in the regular interval, the shaft hoist assembly is subject to a thorough inventory, which includes the determination of the geometrical relationships between the hoisting machine, the headframe and the shaft with its housing. Inventory measurements for shaft and headframe are used for years of conventional geodetic methods including mechanical or laser plumbing and tachymetric surveys. Additional precision levelling is also used for measuring shafts of hoisting machines and rope pulleys. Continuous modernization of measuring technology makes it possible to implement the further methods to the above mentioned purposes. The comparison of the accuracy and the economics of performing measurements based on many years of experience with comprehensive inventory of shaft hoist assembly using various research techniques was made and detailed in the article.
Highlights
The article presents an analysis of the inventory measurements of symmetric double strut headframe construction and two hoisting machines (Fig. 1)
The headframe is located above a 160-meter shaft and equipped with two rope pulleys platforms, located at a height of 37 m and 43.7 m above the framework of the shaft
In order to make a complete inventory of the mining shaft, a number of complementary measurement techniques should be used, which significantly increases the length of the survey
Summary
The article presents an analysis of the inventory measurements of symmetric double strut headframe construction and two hoisting machines (Fig. 1). The headframe is located above a 160-meter shaft and equipped with two rope pulleys platforms, located at a height of 37 m and 43.7 m above the framework of the shaft. Changes in the location are caused by mining works, mining tremors, weather conditions (sunlight, wind) and impact of the lifting equipment on the headframe construction [1]. The detailed rules (shown below) related to the Geological-Mining Law as parameters of safe transport of the shaft indicate: the verticality of the headframe’s stem, the inclination of the rope pulleys and the hoisting machine drum, actual values of friction angles and values of clearance in the mining shaft
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