Under the background that national economy is developing rapidly and mineral resources are exploited energetically today, safety problems become very prominent in mining production, especially in underground mines. Safety problems often happen in a mine ventilation system, e.g. less airflow, return airflow, stagnant airflow, and circular airflow and so on, which menace safe production in underground mines directly. At present, there are many methods and techniques for modulation and control of airflow in un...
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