Analysis of Key Safety Factors Mining Large Section Working Face to Steep Seams
As a scientific method, the mining method of horizontal section top coal caving [1-3] has been widely used at Urumqi coal mine in Xinjiang autonomous region. At present, the section height remains at 18～22m in Urumqi mining area, belonging to the large section mining , and has the possibility to further improve section height. In this paper, the main factors affecting safety were analyzed to the large section working face, pointing out that safety mining of the large section working face must finish a good job selecting a reasonable section height to maximize the recovery ratio of top coal, filling surface to block air leakage channel supplying oxygen after mining working face, blocking and extracting gas to reduce the gas content at working face, and equipping with modern safety testing facilities to enhance safety of the detection sensitivity at working face in four key measures, which would ensure safety mining for large section faces at steep seams.
Qunjie Xu, Honghua Ge and Junxi Zhang
X. P. Shao et al., "Analysis of Key Safety Factors Mining Large Section Working Face to Steep Seams", Advanced Materials Research, Vols. 361-363, pp. 246-249, 2012