Original sentence: HDPF is a more expensive method of tailings disposal than pond storage, however it has many other benefits – not just environmental but it can significantly increase the stability of underground excavations by providing a means for ground stress to be transmitted across voids - rather than having to pass around them – which can cause mining induced seismic events like that suffered recently at the Beaconsfield Mine Disaster.Research at the Porgera Gold Mine is focusing on developing a method of combining tailings products with coarse waste rock and waste muds to create a product that can be stored on the surface in generic-looking waste dumps or stockpiles.Tailings do not have to be stored in ponds or sent as slurries into oceans, rivers or streams.There is a growing use of the practice of dewatering tailings using vacuum or pressure filters so the tailings can then be stacked.Usually called RTD – Rivering Tailings Disposal
Edited sentence: As shown by Davies and Rice (2001 and elsewhere), there is a growing use of dewatering tailings using vacuum or pressure filters and then the tailings can be stacked.HDPF is a more expensive method of tailings disposal than pond storage, however it has many other benefits - not just environmental but it can significantly increase the stability of underground excavations by providing a means for ground stress to be transmitted across voids - rather than having to pass around them - which can cause mining induced seismic events like that suffered recently at the Beaconsfield Mine Disaster.It is certainly a more responsible tailings option for most any mine.Research at the Porgera Gold Mine is focusing on developing a method of combining tailings products with coarse waste rock and waste muds to create a product that can be stored on the surface in generic looking waste dumps or stockpiles.Tailngs do not have to be stored in ponds or sent as slurries into oceans, rivers or streams.Usually called RTD - Rivering Tailings Disposal