The Level of Securing Dust Deposits Against the Possibility of Coal Dust Explosion in the Drilled Dog Headings

The article presents the analysis how actual coal dust explosion hazard is at distance of initial 200 metres safety zone maintained along entire length driven inclined drift II – face 567 in BRZESZCZE colliery, which was used during realization project titled Modelling mechanism explosive deposition vicinity mined faces terms identification, assessment and levelling possibility its financed by National Centre for Research Development. mine level between 0.014 kg/m3 0.193 kg/m3, 0.003 0.051 content non-combustible solids 62.9% 96.9%. In analysed fragment working there settled dry volatile transient water 0.1% 3.8%. a few measurement points (sidewalls, floor, barrier) it observed that lower than required regulations (unsecured dust), resulted from insufficient application stone increased intensity settlement, especially area near longwall face. Analyses fraction distribution showed presence fine dust, while coarser fractions were found places lowered solids. conclusions indicate necessary to modify currently applied dust-explosion prevention measures, ought adjust amount given sections be with more diligence.