According to the laws and regulations, the "three simultaneously" safety inspection of the construction project of coal mine achieved some results in Jiangxi province already.

The misfire causes in coal mine blasting are analyzed. Based on the "coal mine safety regulation" and "blasting safety regulations", the preventing and handling measures are put forward.

According to the concerned rules in "safety regulations of Coal mine" author derived formulae to determine the overwind height, so a theoretical basis for mine hoist design was provided.