Abstract:During construction of large underground chambers in China, the main method of excavation is blasting. Bblasting produces plenty of gas fume and dust. After blasting, slag transport car such as vehicles work can produce automobile exhaust and air-borne dust. Gas fume, dust and automobile exhaust are harmful substances, if our body inhaled can damage health, and cause occupational disease, etc. So the ventilation after bursting of the chambers is necessary. Ventilation can eliminate gas fume, dust a...
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