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Document ID (ISN)33294
CIS number 80-817
ISSN - Serial title 0026-5160 - American Mining Congress Journal
Year 1979
Convention or series no.
Author(s) Pyles H.G.
Title Water-spray induced face ventilation.
Bibliographic information Sep. 1979, Vol.65, No.9, p.27-30. Illus. 4 ref.
Abstract Previously-used methods for preventing working face ignitions by using slower bit speeds (under 400rpm) and installation of diffuser fan systems on continuous mining machines can now be supplemented by water sprays (originally intended for methane control) used to induce face ventilation. The system was tested on a mock-up mine section. Tracer smoke representing methane was dispersed and fresh air rapidly circulated across the face by the diffuser and spray systems (2-to-1 methane reduction). Other test results: use of upper face nozzles actually deters air flow across the face; the sprays were highly successful in preventing ignitions, and reduced noise and dust. 11 guidelines are given for installation of water sprays.
Descriptors (primary) mine gases; water spraying; coal mining; fire prevention; mine ventilation
Descriptors (secondary) coal dust; experimental mine research; wet dust control; continuous mining machines
Document type -
Subject(s) Mines and quarries
Broad subject area(s)
Browse category(ies) Fires
Mining and quarrying