Roof rock structures and related roof support problems in the Pittsburgh coalbed of southwestern Pennsylvania
Technical Report
·
OSTI ID:7312739
The Bureau of Mines investigated severe coal mine roof support problems along a section of main entries in the Pittsburgh coalbed in southwestern Pennsylvania to identify the causative factors. The mine roof was examined in detail, and various sedimentary structures are described that contributed directly to irregular and unstable roofs. Small-scale paleochannels, scours, and related slickensides were identified as the leading cause of bad roofs, and isopach maps were prepared to illustrate a method whereby the presence of these structures could be inferred in advance of mining. Probably second in importance was the occurrence of relatively incompetent flaggy, poorly cemented sandstone, weakened by coal and micaceous laminae. No effect of in situ stresses on roof stability was detected.
- Research Organization:
- Bureau of Mines, Pittsburgh, PA (USA). Pittsburgh Mining and Safety Research Center
- OSTI ID:
- 7312739
- Report Number(s):
- BM-RI-8230
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of ancient stream channel deposits on mine roof stability
Geologic structures in coal mine roof. Rept of investigations/1982
Slickenside occurrence in coal mine roof of the Valley Camp No. 3 mine near Wheeling, West Virginia
Technical Report
·
Wed Dec 31 23:00:00 EST 1986
·
OSTI ID:6539621
Geologic structures in coal mine roof. Rept of investigations/1982
Technical Report
·
Sun Jan 31 23:00:00 EST 1982
·
OSTI ID:6861400
Slickenside occurrence in coal mine roof of the Valley Camp No. 3 mine near Wheeling, West Virginia
Technical Report
·
Sun Dec 31 23:00:00 EST 1978
·
OSTI ID:5955901