RI 3588 Effect Of Changes In Moisture And Temperature On Mine Roof - 1. First Report On Strata Overlying The Pittsburgh Coal Bed ? Introduction (b06e9516-351b-476e-92ee-7fca05296a16)
- Organization:
- The National Institute for Occupational Safety and Health (NIOSH)
- Pages:
- 57
- File Size:
- 23145 KB
- Publication Date:
- Jan 1, 1941
Abstract
Falls of roof in coal mines and means of preventing them have been subjects of study for many years, and an extensive literature has resulted. Usually each individual paper has placed emphasis on one phase of the subject, such as fatalities, nature and extent of nonfatal injuries, methods of tembering (particularly in rooms or other wide places), safety along retreating rib lines, and methods of causing falls in abandoned areas. It is only in recent years that there has been persistent question as to why
Citation
APA: (1941) RI 3588 Effect Of Changes In Moisture And Temperature On Mine Roof - 1. First Report On Strata Overlying The Pittsburgh Coal Bed ? Introduction (b06e9516-351b-476e-92ee-7fca05296a16)
MLA: RI 3588 Effect Of Changes In Moisture And Temperature On Mine Roof - 1. First Report On Strata Overlying The Pittsburgh Coal Bed ? Introduction (b06e9516-351b-476e-92ee-7fca05296a16). The National Institute for Occupational Safety and Health (NIOSH), 1941.