J.M. Mutmansky's research while affiliated with Pennsylvania State University and other places
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Publications (16)
This revised edition presents an engineering design approach to ventilation and air conditioning as part of the comprehensive environmental control of the mine atmosphere. It provides an in-depth look, for practitioners who design and operate mines, into the health and safety aspects of environmental conditions in the underground workplace. The con...
This paper describes the convection-only modeling strategies for simulating the distribution transport of diesel particulate matter (DPM) in multiple-diesel sections. The basic logic of the simulation model for handling air and diesel movements and the means for modelling DPM distributions under alternate exhaust locations on the diesel vehicles an...
The objective of the work described here was to design and develop a computer model to study the distribution/transport of diesel particulate matter in mine airways and to apply the model to study methods of reducing the concentrations of diesel particulate matter. The basic logic of the simulation model for handling air and diesel movements and th...
There are several logical objectives for dust samples used in biomedical research. Obviously, the dusts used should closely resemble natural mine dusts with respect to particle size distribution, particle shape, and composition. These characteristics must be consistent from sample to sample. Usually the relative freshness of the dust is also of pri...
The overall objective of this study is to contribute to the reduction of the quartz dust hazard in underground coal mines through a better understanding of the sources and generation of airborne quartz dust. The research project has included extensive experiments in operating mines for (1) documenting the amount of respirable dust generated, (2) me...
Procedures for determining the operating point that results when a fan is connected to a mine and placed in operation have been a source of confusion for decades. A variety of techniques have been proposed, often to the detriment of the practicing ventilation engineer trying to apply the techniques to the many mine/fan matching problems encountered...
Recognition of Coal Workers' Pneumoconiosis (CWP) as a major occupational disease has affected various aspects of the coal mining industry in the United States as well as in almost all major coal producing countries. Some of the variables that are thought to affect the occurrence of CWP are the mass of the dust in the working place, the rank of the...
The development of a sampling instrument for the assessment of an underground coal miner's exposure to airborne respirable coal mine dust on a continuous and real-time basis has been long identified as essential for timely initiation of control actions. A respirable dust dosimeter (RDD) which operates on the principle of increasing pressure across...
This paper discusses recent developments in the following areas of mine ventilation network theory and analysis: (1) a concept of sub-systems for multiple fan systems based on a special type of cutset of the network; (2) cutset operations for obtaining alternative network solutions; (3) network properties including the conditions for constant syste...
The primary objectives of the report are to review current dust sampling and analytical strategies used on coal mine dusts, to define the current needs for improved strategies, and to better coordinate the engineering and biomedical research efforts being aimed at reducing the incidence of coal workers, pneumoconiosis (CWP). To provide background i...
The report was part of an ongoing effort at The Pennsylvania State University to investigate the characteristics of airborne mine dusts and its relationship to coal worker's pneumoconiosis (CWP). The specific purpose of the project was to analyze the size and elemental composition of airborne coal mine dusts and the ramifications of these character...
Citations
... To eliminate the risk of mine ventilation hazards, novel optimization scheme alternatives for the complex network variables should be adopted to be rapidly applied in case of emergency to eliminate hazards. Therefore, determination of the locations and sizes of these ventilation control devices representa main challenge in design and analysis of mine ventilation systems (Wang et al. 1985;Wu and Topuz 1987). ...
... According to previous statistics in mine's accident, there are many works related to accidents in mines since the beginning of last century (Marovelli, 1981;Ramani & Mutmansky, 1999). Evaluation of safety factors are important in many industries. ...
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... In Eqs. (1) and (2), the airstream enthalpy E, which denotes the sum of enthalpies of dry air and water vapor, can be obtained by psychrometric relationships (McPherson 1993, Hartman et al. 1997, Knechtel 2011). Relative to a 0 • C datum, the enthalpy of moist air is ...
... Also in this case, the hypothesis of the effect of more selective dust control approaches towards samples less rich in silica dust cannot be excluded. A study conducted in 1987 by Penn State University on the size and elemental composition of air borne coal mine dust showed coal mine dust present underground in bi-modal distributions with a smaller mode around 2 lm [21]. A previous study on silica (more than 90 % silica) particle distribution in respirable coal mine dust sam ples (surface and underground) showed a median around 1 lm [22]. ...
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... For context, the description of each sample is represented in Table 5. Upon receipt, the samples were coarse (ranging from 5 cm to 180 µm) and thus required milling to reduce the particle size to the size range of dust. To achieve this, a process was developed to reduce the final particle size of the population to approximately 25 µm or less applying methods defined by previous authors [12,[59][60][61] (further described in Supplementary Section S3). ...
... The TEOM is a portable microbalance that weights the filter as dust accumulates on it [30]. The dosimeter is a lowcost screening device that measures dust based on filter pressure-drop [31]. ...
... The control of dust containing quartz in coal mines is limited by uncertainty regarding the origins of quartz yielded in the respirable dust fraction. Several studies have demonstrated that the mined seam is not the principal source of respirable silica dust (Hicks and Nagelschmidt 1943;Dodgson et al. 1971;Ramani et al. 1987). Presence of more toxic, clean SiO 2 quartz tetrahedral may increase the frequency of silicosis (Dodgson et al. 1971;Robock and Bauer 1990;Chen et al. 2005;Harrison et al. 2005). ...
... The accuracy of these calculations depends on correctly determining air temperatures, pressures and humidity. Because of the magnitude and direction of the airflow the system in the mine is affected by seasonal temperature changes (Hartman et al., 1997). ...
... Moreover, it was shown that the selection of the brattice setback distance could significantly improve ventilation to the end of box cut. Lee et al. (1996) investigated the effects of brattice characteristics on the effectiveness of ventilation on reductions in concentration of diesel particulate matter. They developed computer models to study the generation, transfer, and distribution of diesel particulate matter in coal mine sections. ...
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