Abstract
Polish hard coal mining has been successfully used for many years for the fire prevention of hydromixtures produced on the basis of fine-grained energy waste. These hydromixtures are transported and introduced by the pipeline system into the infarct space behind the progress of the mechanized complex, where leftover coal residues pose a threat of spontaneous ignition. The basic task of this technology is the possible maximum filling of free rock rubble spaces with fine-grained hydromixtures which results in minimizing the presence of oxygen, necessary for initiating a fire phenomenon. The effectiveness of this technology depends mainly on the efficiency of the installation that transports the hydromixtures and this is closely related to the amount of goafs water. The article presents laboratory tests of selected ash and goafs water from the point of view of its capability and transport efficiency in an example of a gravity pipeline installation in relation to the amount of hydromixture necessary for its preparation.
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