Modify Selection
- Research methods and measures:
- Roof quality
Home Links
Results 11 - 20 of 33
-
8/20/2013 - PC softwareA software program to help select roof bolts for primary support in underground coal mines
-
9/1/2010 - Peer reviewed journal articlesSonic travel time logging of exploration boreholes is routinely used in Australia to obtain estimates of coal mine roof rock strength. This paper describes research aimed at developing a correlation for use in the U.S.
-
7/1/2009 - Conference papersA process is presented that relates the structures and their locations to provide a numerical value, or roof quality index that can be used to assess roof stability.
-
10/1/2008 - Peer reviewed journal articlesThis paper gives the results of 4 case studies concerning the interaction between polyurethane (PUR) and coal mine roof in order to determine the mechanism of reinforcement, in both highly fractured rock and unfractured rock.
-
6/1/2008 - Peer reviewed journal articlesThis paper describes a modeling approach that can be used as a tool to evaluate potential roof failure and optimize the stability of room and pillar layouts.
-
3/1/2008 - Conference papersThis paper describes a modeling approach that can be used as a tool to evaluate potential roof failure and optimize the stability of room and pillar layouts.
-
7/1/2007 - Conference papersA cooperative study was conducted to evaluate the effectiveness of (partially) pre-driven longwall recovery rooms supported with pumpable roof supports.
-
7/1/2007 - Conference papersThis paper presents the results of a study of roof conditions in 34 limestone mines in the Eastern and Midwestern U.S.
-
8/1/2006 - Conference papersNIOSH conducted wet/dry immersion cycling of clay-rich rocks, which provides an accurate, quick and inexpensive method for estimating the moisture sensitivity of mudrocks. With this information mine operators can begin to anticipate hazardous ground.
-
8/1/2004 - Conference papersMore that 700 microseismic emissions were collected from two underground limestone mine roof fall areas in southwestern PA. Results reveal much about the behavior of strata prone to failure and allow for the construction of hazard maps.
Home Links
Content source: National Institute for Occupational Safety and Health, Mining Program