Rock mechanics study for the shortwall mining at the Valley Camp No. 3 Coal mine, Triadelphia, WV. Final report
Technical Report
·
OSTI ID:5029231
A series of rock mechanics studies were conducted at the shortwall panel in Valley Camp No. 3 coal mine. In contrast to the other shortwall panels in the U.S., this mine adopted the tail entry advancing method. The study is composed of two main parts: The first part is about the reaction of the chocks to the roof load in different stages of operations by recording the pressures of the pressure valves attached on the chocks. The method of the mean load density and support resistance determination was developed, and recommendations were made for improvement in performance. The second part includes a comprehensive rock mechanics study about stress distribution, convergence, differential roof sagging in the pillars, entries, shortwall panel and gob area. The major effort is made in detecting the abutment pressures in the panel, pillars and gob area, the roof caving made in the gob, the entry convergence and the effects of roof bolting on differential roof sag.
- Research Organization:
- Bureau of Mines, Laramie, Wyo. (USA). Petroleum Research Center
- OSTI ID:
- 5029231
- Report Number(s):
- NP-23099
- Country of Publication:
- United States
- Language:
- English
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