Effect of Hazard Identification and Information Amount Calculation in Coal Mine Safety Signs Design

Hazard identification is an important basis for the design of coal mine safety signs. This paper analyses the coal face hazard checklists in a large state-owned coal mine enterprise in China from January 2015 to December 2015. The conclusion is hazard occurring most frequently on top five are liquid leakage, spray unopened, belt deviation, littering, cylinder distance too close. According to the conclusion, the paper designed five safety signs which are cylinders must have a sufficient distance, be careful not to let the belt running deviation, prohibit littering, precaution the liquid leakage and must open spray using computer graphics software. Using information formula to calculate five disigned safety signs of design, it is found that no ambiguity for the sign of must be sprayed marks. Information of sufficient distance between cylinders sign and caution liquid leakage sign is between 0 and 1, which are acceptable. Information of no littering sign and warning the belt deviation sign is between 1 and 2, which means there are too many ambiguities for the signs and need to be redesigned.