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11. EXPLOSIVE DUST TEST VESSEL COMPARISON USING PULVERIZED PITTSBURGH COAL.

Author

MILLER, JACOB, SCHAFLER, JAY, MULLIGAN, PHILLIP, EADES, ROBERT, PERRY, KYLE, and JOHNSON, CATHERINE

Subjects
COAL mining, COAL dust, DUST explosions
Abstract

Explosions of coal dust are a major safety concern within the coal mining industry. The explosion and subsequent fires caused by coal dust can result in significant property damage, loss of life in underground coal mines and damage to coal processing facilities. The United States Bureau of Mines conducted research on coal dust explosions until 1996 when it was dissolved. In the following years, the American Society for Testing and Materials (ASTM) developed a test standard, ASTM E1226, to provide a standard test method characterizing the "explosibility" of particulate solids of combustible materials suspended in air. The research presented herein investigates the explosive characteristic of Pulverized Pittsburgh Coal dust using the ASTM E1226-12 test standard. The explosibility characteristics include: maximum explosion pressure, (Pmax); maximum rate of pressure rise, (dP/dt)max; and explosibility index, (Kst). Nine Pulverized Pittsburgh Coal dust concentrations, ranging from 30 to 1,500 g/m³, were tested in a 20-Liter Siwek Sphere. The newly recorded dust explosibility characteristics are then compared to explosibility characteristics published by the Bureau of Mines in their 20 liter vessel and procedure predating ASTM E1126-12. The information presented in this paper will allow for structures and devices to be built to protect people from the effects of coal dust explosions. [ABSTRACT FROM AUTHOR]

Published
2018
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13. APPENDICITIS: A STATISTICAL SURVEY OF 10,000 CONSECUTIVE CASES AT PROVIDENCE HOSPITAL

Author

DAVIS, JAMES E., MUSKE, PAUL H., MULLIGAN, PHILLIP L., and GUTOV, JULIUS

Abstract

The data collected for this survey are based on all the clinical cases of appendicitis registered in Providence Hospital, Detroit, during the decade January 1925 to May 1935 and represent the treatment of 10,000 cases by approximately twenty-five different surgeons. The statistics are the result of critical analyses of all appendix cases, the combined information of clinical history and histopathologic reports. More than 98 per cent of all the appendixes were examined histopathologically by the senior author. In cases in which disagreement arose between the clinical and the tissue diagnosis, the sections were reviewed or additional sections were cut and examined. The pathologist's diagnosis was then adopted in classifying the case, but in some instances both the clinical and the histopathologic information was relied on for this purpose.The clinical diagnoses of acute appendicitis corresponded with the pathologic diagnoses in 85.6 per cent of the cases.One of the primary

Published
1937
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