The blasting fly-rock poses a potential risk to workers at the blasting site. Considering the uncertainty of various influencing factors of the risk, this paper introduces the uncertainty measurement theory to build a pre-evaluation model of blasting safety for fly-rock, in which the weight and identification criterion of each evaluation index are determined by information entropy and confidence, respectively. Then, the model was adopted to pre-evaluate the harms of blasting fly-rock in an earthwork excavating project. The case analysis shows that the model can quantify the uncertainty of each influencing factor, and realize objective evaluation of the risk of blasting fly-rock. The research findings lay a solid basis for reasonable and effective control of the harms caused by blasting fly-rock.
blasting fly-rock, safety pre-evaluation, unascertained measurement, index weight
This research is supported by the National Natural Science Foundation of China (51604082) and Guizhou Province Science and Technology Project (Guizhou scientific cooperation platform personnel 5643).
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