The 4th International Symposium on Mine Safety Science and Engineering (ISMSSE2018)

259 / 2018-02-01 10:03:07

Analysis of unsafe acts in the development of derailing accidents of inclined shaft trip lifting in coal mines

behavioral safety, accident causation “2-4” model, coal mine, derailing accidents of inclined shaft trip lifting, unsafety acts

Mine Safety Science Theory and Emergency Rescue > Mine safety management

To reduce unsafe acts in derailing accidents of inclined shaft trip lifting in coal mines, based on accident causation “2-4” model, the unsafe acts of 55 derailing accidents were investigated by statistical analysis and classification. The results showed that derailing accidents resulting in casualties should meet three requrimets: vehicles from the mechanical control; failure of the protective facilities; persons in the danger zone. The most critical unsafe acts causing the vehicle to spin out of control including: not stopped lifting work when the rope was found badly worn; Use of non-locking device connecting pin; not the tub plug is inserted in the end; failing to deal with risks of broken wires in wire ropes overrun. The main unsafe acts causing the failure of the protective facilities including: untreated car guards potential failure; upgrade hang without safety lines; not installed protective devices. Accidents caused by casualties’ unsafe acts accounted for 74.55% of the total accidents. It includes two types of unsafe acts: take vehicles illegally; wait, walk or work in hazardous locations.