安全工程專業(yè)英語翻譯-在線瀏覽
2025-01-03 09:33本頁面
【正文】 ventilation system allows continuous miners to operate without being obstructed by brattice constructions. In addition, booster fans can be located in long airways to boost the airflow volume. These fans can be freestanding and used without using bulkheads. CIRCULATION CONTROLS Mineventilation systems present a unique challenge in that the workfaces are normally moving away from the source of fresh requires continuous changes to the ventilation system. These controls are needed to distribute the air underground, so that each working section Is ventilated with an adequate supply of fresh air. The various devices work collectively to direct the movement of the air through the main Intakes to the working section and move out through the returns without shortcircuiting, which occurs when air from the intake goes directly into the return. ELIMINATING DIESEL EMISSIONS As Mr Bear mented above, reducing harmful diesel emissions is another vital aspect of improving underground working conditions. But, while dieselengine manufacturers and machine OEMs should be acknowledged for their bined achievements. In reducing pollutants, there would always be a percentage of emissions that must be strictly monitored, diluted and vented to the surface. What is 3 needed is an alternative to diesel, and some people believe fuel cells could be the key. A 2020 study by the University of Nevada used data obtained from a survey sent to 173 US metal and nonmetal underground mines. From a 61% return, the survey included 4,786 diesel units (totalling 478,200kW), collectively consuming about 68MI/y of diesel fuel. As of January 20, the Mine Safety and Health Administration (MSHA) enacted a regulation limiting total DPM (diesel particulate matter) emissions from diesel engines to an Interim 450Ngm of total carbon/cm39。 of ambient air, a
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