The U.S. Bureau of Mines (USBM) and Diesel ControlsLimited are evaluating a new diesel emission control system on an underground mine vehicle. The system is a catalyzed ceramic wall-flow diesel particulate filter (CDPF) combined with an oxidation catalytic converter (OCC). It is the first installation in the
Diesel-powered mining equipment offers a number of advantages over other types of materials handling equipment. Its mobility, versatility, and ruggedness make it adaptable to many different mining methods. Since the development of the articulated body, 4-wheel-drive load-haul-dump (LHD) in 1962, the use of diesel equipment has become widespread in underground mines. In 1988, the National Institute for Occupational Safety and Health recommended that whole diesel exhaust be regarded as a “potential occupational carcinogen” (I).* The Mine Safetyand Health Administration (MSHA), the regulatory agency responsible for overseeing mines in the U.S., has proposed new standards for the use of diesel equipment in underground coal mines, and is expected to recommend an exposure limit for diesel particulate matter (DPM) (2) DPM is respirable and is composed of nonvolatile carbon with adsorbed or condensed compounds These include potentially mutagenic or carcinogenic compounds, such as polynuclear aromatic hydrocarbons and sulfates. Typical can concentrations of DPM in mines range from 0 2 to 1 0 mg/m3(3,4) The USBM, in cooperation with mining companies and equipment manufacturers, is investigating a variety of emission controls for reducing miner exposure to DPM.