Page History
Two input files needed for running this Service. The seismic events catalog and the mining front advance files, both available in the AH Episodes (See "AH Episodes" chapter). Once these files are uploaded to the personal workspace, the User may load them into the TDSH (mining front) application, by clicking on the "Actions" tab and then select consecutively, "USE IN APPLICATION" and "Hazard in mining front surroundings", as shown in Figure 1.
Figure 1.
After the service has been selected the User is requested to select options and fulfill some fields with parameter values needed for the TDSH analysis. First of all, he/she needs to select the proper seismicity catalog from the workspace, by clicking on the "Change input" tab of the "Using seismic Catalog" field, shown in the red box in Figure 2. The other parameters that have to be set are (also shown in Figure 2):
Figure 2.
Select Magnitude column: The user may click on the small arrow in the respective tab in order to chose among different magnitude scales, in the cases where they are available (e.g. ML, Mw, etc).
...
Magnitude distribution estimation method: Four different methods are available in the IS-EPOS platform: The Unbounded Gutenberg-Richter, the Upper-bounded Gutenberg-Richter, the unbounded non-parametric and the Upper-bounded non parametric estimations. To select one of the aforementioned methods of analysis, the User has to click on the arrow in the respective box.
Time window Window time step (days): In this field the User selects the time window step, i.e. the number of days between the starting dates of subsequent datasets (see Figure 3 caption for details).
Magnitude: Magnitude for which the TDSH parameters will be calculated.
Method of creating time windows: Three options are available in this field after clicking on the small arrow of the tab: "TIMEconstant time period", "EVENTSconstant event number" and "FRONTconstant front advance size" (see "Time window size" field below for details).
Time window Window size: Size (span) of the windows containing data for the analysis. If "TIME" is selected, the given value corresponds to the duration of each dataset, in days. If "EVENTS" is selected instead, the given value corresponds to the number of events that each dataset contains (see Figure 3 caption for details). Finally, if the "FRONT" mode is selected, the given value corresponds to the meters of front advance, i.e. a subsequent time window start at the time when the front advance is moved as much (in meters) as this value indicates from the position it was in the beginning of the previous time window. Therefore, in this case, nor the number of events neither the time range will be equal in the datasets.
Period length (for exceedance probability): Duration of time period for which exceedance probability will be estimated for the magnitude specified above
Figure 3.The time window step is set to 5 days in both cases. Notice that the each starting date has 5 days difference from the previous one. Left frame: Parameters set are "Time window size" equal to 100 days and "Method of creating windows" selected to be "TIME". In this case the number of events differs in each dataset, but the time range (difference between ending and starting dates) is 100 days for all the datasets. Right frame: Parameters set are "Time window size" equal to 75 (events) and "Method of creating windows" selected to be "EVENTS". In this case the number of events the same in all dataset and equal to 100, but the time range (difference between ending and starting dates) is different for each dataset. However, when "FRONT" is selected (not shown here), nor the number of events neither the time range will be equal in the datasets.
...
Overview
Content Tools