The health and safety analysis is part of an overall effort to identify and develop innovative underground coal extraction systems. The single-entry tunnel borer system was initially considered an innovative approach to underground mining because it exhibited a means of increasing the speed and efficiency of entry development by reducing the number of entries. However, to be considered a truly advanced system, the tunnel borer had to meet distinct safety criteria as well. The objective was to examine the tunnel borer design and determine whether it offset major health hazards, and satisfied the prescribed safety levels. As a baseline for comparison, the tunnel borer was compared against the continuous mining entry driving system. The results of the health analysis indicated that while the tunnel borer design offered improvements in dust control through the use of water sprays, a higher face ventilation rate, and the application of spalling rather than the conventional grinding process, it interjected an additional mutagenic is and toxic compound into the environment through the use of shotcrete. The tunnel borer system easily conformed with the prescribed fatality limit, but exceeded the required limits for disabling and overall injuries. It also exhibited projected disabling and overall injury rates …

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mr. and Mrs. Patrick Kennedy gets advice on care of their son, Leonard Jason Kennedy, from Presbyterian Hospital's parenting instructor Sharron K. Johnson."

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Paul Hansen OSU Basketball Coach"

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Paul Hansen OCU Basketball Coach"

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Paul Hansen OCU Basketball Coach"

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Paul Hansen OCU Basketball Coach"

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Oklahoma State University management specialist A. L. Hutson, Duncan, explains several options to people who are planning their retirement."

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Dan Bloodsworth lounges with a book in a mission room."

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Weekly newspaper from Jacksboro, Texas that includes local, state, and national news along with extensive advertising.

Semi-weekly newspaper from Bastrop, Texas that includes local, state, and national news along with extensive advertising.

Newspaper clippings of an article about Dr. May Owen, who was honored at a Texas Medical Association luncheon. The article includes information about her career and her financial help to medical students. A photograph of Dr. Owen at the luncheon is included. Each clipping is mounted on a separate piece of paper.

Photograph of the Lyons Cemetary (located at Barnes Bridge Rd) in Sunnyvale, Texas.

Photograph used for a newspaper owned by the Oklahoma Publishing Company.

Photograph used for a newspaper owned by the Oklahoma Publishing Company.

Photograph used for a story in the Oklahoma Times newspaper. Caption: "The late Jewel Poore, left, receives an award from Denise Caram, director of volunteers at the Midwest Memorial Hospital."

Photograph used for a newspaper owned by the Oklahoma Publishing Company.

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Graduate students Vassiliki Papapostolou, left, and Petros Zenieris study prints at the art reprint sale in the University of Oklahoma student union."