The aim of the study was to analyze the impact on the strip ratio SR through varying haul road geometric parameters in two types of deposits, namely one with a steeper dip and a second one with a more equidimensional horizontal behavior. The SRs and the overall slope angle were compared with a base scenario, where the results show an increase in the SR when: a the width of the haul roads was increased; b the longitudinal grade of the road was decreased; and c switchbacks were added. It was also noticed that the SR variations are inversely proportional to the overall slope angle variations, illustrating the important role that the geometric design of the haul roads has in the return on capital.
Stripping ratio. The main factor in designing a n open pit mine, which largely determines the cost of mining, is the stripping ratio. Except in rare cases, it increases with depth of the orebody below surface.
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A strip ratio, or stripping ratio, is an important measurement related to the open-pit mining process. It represents the amount of waste material, also known as overburden, that must be moved in order to extract a given amount of ore. After all, moving lightweight material, like sand or dirt, is simpler than moving hard rock.
The various stripping ratios that are used in surface mining are the following: 1. In case of simultaneous back filling thickness ratio helps in knowing whether the backfilled surface will be lower than, equal to or above the pre-mined land surface level. BESR helps in determining the pit limit.
A strip ratio, or stripping ratio, is an important measurement related to the open-pit mining process. It represents the amount of waste material, also known as overburden, that must be moved in order to extract a given amount of ore. That said, stripping ratios are not only about the volume of unwanted material present at a site; they also take into account the types of material that must be removed to reach the ore. After all, moving lightweight material, like sand or dirt, is simpler than moving hard rock.
In miningstripping ratio or strip ratio refers to the ratio of the volume of overburden or waste material required to be handled in order to extract some tonnage of ore. For example, a stripping ratio means that mining one tonne of ore will require mining three tonnes of waste rock. When compared to surface mining, which requires overburden removal prior to ore extraction, underground mining operations tend to have lower stripping ratios due to increased selectivity.
A link to reset your password has been sent to your email address. You should hear from us within a few minutes. Examining the top five thermal coal-exporting countries over the period to provides a useful insight into where miners have had the scope to alter their strip ratios over time. The fall reflects the closure of, or decline in production from, open cut mines with uneconomic strip ratios.