Results 621 - 630 of 646

• Extended Cut Face Ventilation for Remotely Controlled and Automated Mining Systems
  2/1/1992 - Conference papers
  U.S. Bureau of Mines research is studying ways to more effectively ventilate extended cuts. Two face ventilation techniques that utilize either blowing brattice or a jet fan for deep cutting are examined in this paper.
• Behavior of a Coal Pillar Prone to Burst in the Southern Appalachian Basin of the United States
  8/1/1990 - Conference papers
  This paper describes research designed to quantify the behavior of a particular size abutment pillar prone to burst or bump (local terminology). This research has attempted to construct the stress and convergence profiles of the pillar.
• One-Way Fire Warning Alarm System for Underground Mines
  7/1/1990 - Conference papers
  An ideal fire warning alarm system for underground mines would be low cost, convenient, fast, reliable, and able to warn all underground workers. The U.S. Bureau of Mine devised a one way communication system employs a large loop antenna and transmitter...
• A Microcomputer Network for Mining Machine Control
  7/1/1990 - Conference papers
  This paper details the computer hardware and software integrated to provide computer-assisted control and monitoring of four different coal mining machines. The backbone of each system is a U.S. Bureau of Mines integrated distributed microcomputer contr...
• The Effects of Roof and Floor Interface Slip on Coal Pillar Behavior
  1/1/1990 - Conference papers
  This U.S. Bureau of Mines paper discusses the importance of an interface slip mechanism between the coalbed and the surrounding strata in controlling the extent and pattern of stresses and deformations in a coal pillar.
• Physiological Responses and Subjective Discomfort of Simulated Whole-Body Vibration From a Mobile Underground Mining Machine
  10/1/1988 - Conference papers
  Eight men participated in a pilot study to evaluate the effects of shock and whole-body vibration (WBV) on heart rate (HR), blood pressure (BP), and subjective discomfort.
• Controlling a Thin-Seam Miner 500 Feet from the Face
  7/1/1986 - Conference papers
  This report summarizes work sponsored by the Bureau of Mines in the development of a remote operating system (ROS) for controlling a thin-seam continuous miner (TSCM) 500 feet or more distant from the extraction face.
• The Application of Fiber Optics Technology to the Design of Mine Lighting Systems
  7/1/1986 - Conference papers
  This paper describes Bureau of Mines research and development of a new and innovative mine lighting system based on fiber optics technology.
• The Deserado Mine Monitoring and Control System
  7/1/1986 - Conference papers
  The Deserado mine monitoring and control system is a complex system designed to monitor environmental parameters and electrical power, and to operate all types of equipment used in mines, including the entire haulage system.
• Medium Frequency Vehicular Control and Communications Systems for Underground Mines
  1/1/1984 - Conference papers
  Theoretical and experimental research sponsored by the U.S. Bureau of Mines shows that medium frequency (MF) electromagnetic (EM) signals propagate great distances in an underground environment such as a tunnel or mine. This propagation is enhanced by d...