1. Coal mine entry rating system: A case study
- Author
-
Ted Klemetti, Craig S. Compton, and Mark Van Dyke
- Subjects
lcsh:TN1-997 ,Flexibility (engineering) ,Rating system ,business.industry ,Control (management) ,0211 other engineering and technologies ,Coal mining ,Energy Engineering and Power Technology ,Geology ,02 engineering and technology ,Geotechnical Engineering and Engineering Geology ,Transport engineering ,Overburden ,Coal ,020401 chemical engineering ,Geochemistry and Petrology ,Time dependency ,Support ,0204 chemical engineering ,business ,lcsh:Mining engineering. Metallurgy ,021101 geological & geomatics engineering - Abstract
Coal mines are continuously seeking to determine the performance of entries with different ground control products and installation methods. There are many factors that impact how an entry will perform which include but are not limited to geology, overburden, bolting type and pattern, and mine design. At the National Institute for Occupational Safety and Health (NIOSH), research has been instituted to examine the relationship of the parts of a coal mine entry as a system and not as individual components. To study this relationship, the first step in this study was to create a numeric rating system that accurately reflects visual observations of the mine entry and is easy to implement. NIOSH researchers devised this rating system to improve upon previous ideas, offering increased flexibility which can be incorporated into an overall entry condition that offers different levels of confidence based on the user’s time devoted to the inspection. This new entry rating system was implemented at three different mines over varying periods of time to evaluate the ground response to the geology, bolt installation pattern, stress changes by mining, overburden, and time dependency.
- Published
- 2022