... of approximately 1003 metres below surface (mbs). Conventional mining is applied in an up-dip split panel configuration at a stoping width of approximately 1.2 m. During the fall of ground site investigation, hangingwall alterations were identified as well as abnormal behaviour of the pillars and support units...

... lifetime. The mineralization process caused different degrees of argillic alteration in the veins' surroundings, potentially compromising pit wall stability. Two geotechnical rock-mass characterization programmes were carried out in 2012 and 2015 to perform slope stability assessments. This work compares...

... Abstract A study on the mineralogical ageing of iron ore rock was performed. During mining, oxidizing conditions were imposed in the mines for a century and chemo-mineralogical transformations occurred in iron ore pillars: chemical alteration of reduced minerals (siderite and berthierine...

... Volcanic rock is distributed extensively across Japan and is frequently subjected to hotwater property alteration. This paper has introduced the clay mineralization that occurs in these rocks as a result of the alteration process, together with associated engineering properties. The effects...

... components - e.g. in pyroclasts, hyaloclastites, lahar deposits - not seldom including vitreous (glass) phases. The mechanical strength of these rocks may then be a serious concern in engineering works. Glassy phases are very liable to alteration, either under a physical point of view once the thermodynamic...