| 摘要 |
<p>A method to aid in the exploration, mine design, evaluation and/or extraction of metalliferous mineral and/or diamond deposits in a subsurface comprises providing three-dimensional seismic data; providing an initial model of the subsurface; performing wavefield tomography at least partly as a function of at least one property of the subsurface in three-dimensions using the initial model and the seismic data to generate an updated model; and determining an estimate of the at least one property of the subsurface from the updated model. A plurality of sources and receivers 130 are used to obtain the data, some of which 120 may be in a borehole or mine shaft and others 110 may be in the gallery of a mine. An explosion used in the block caving process may be used as a seismic source. The tomography may be implemented in the time, frequency or Laplace domains, and synthetic seismic data may be generated by solving the acoustic, elastic or visco-elastic wave equations using finite differences, finite elements or spectral elements.</p> |
