At the mine feasibility stage data is collected from several sources. This data may be multi-dimensional. Space and time are examples of the multi-dimensionality of data. At the operational stages data is also collected from various sources to ensure the mine is operating optimally, economically and safely. Mines are therefore dealing with mega data from multiple sources and dimensions at any given time. Understanding mega data from multiple sources and dimensions calls for new thinking. The extreme power of computers coupled with virtual reality technology and scientific visualization provides a way for dealing with and understanding multidimensional mega data from multiple sources. The concept of Big Data has recently emerged. This paper argues Big Data application in mining should be approached cautiously and discusses the benefits and future of virtual reality and scientific visualization in dealing with multi-dimensional mega data from multiple sources in mining practice with case examples.