This paper summarizes the results of a research project whose goal was to provide the Australian coal industry with a rib support design methodology and software tool that could be used by suitably qualified colliery staff. The project was funded mainly by ...

In this paper, a state-of-the-art, three-dimensional, full waveform, microseismic system was used to analyze the rock failure around a deep (> 750 m (2500 ft) of cover) bump-prone longwall panel. The microseismic system consisted of both underground and surface ...

This report presents results of a U.S. Bureau of Mines study of longwall gob material. The objective of this work was to determine material stiffness properties of the gob for use in numerical models of rock mass response to longwall mining. Photographs of ...

The U.S. Bureau of Mines is investigating longwall panel layouts to maximize coal recovery and minimize interactive problems in multiple-seam operations. When coalbeds are longwall-mined in descending order, the transfer of stress from overlying gate roads ...

This research has attempted to construct the stress and convergence profiles of the pillar in order to evaluate the ultimate strength, pillar deformation modulus, visco-elastic deformation, and violent failure characteristics during longwall mining. This information ...

This chapter describes and explains methods for the underground mining of mineral deposits. The descriptions are generalized and focus on typical applications. Example chosen illustrate types of mining practice as of 1999. However every mineral deposit with ...