_REVISION - C1996083 ‎(2)‎

• Permit No: C1996083
• IBM Index Class Name: REVISION
• Doc Name: Seismic Event Data Acquistition and Processing Distribition and Coordination Across PC-Based Network
• Type & Sequence: PR10
• Media Type: D
• Archive: No

r��m�a RUII�a1a
On-Sile Automated rrif�nac�rta
Data processJng
DPuo Una r twim
Fi`3l1]�e?3U
R;o�ll@n
do!Gct an
F�+iiu�gyreµ oaia
YK9d or"t bet
-iuttaeo fi Aio ME
cod" r'lxzqlp
8uttasa P i(MI Wan Wer atmai trra idr;
Pyimn cdlnpm�&t=te+
+yMsL;mi,rrf i, vnrRtarrn
dam r'+c+b g rr�4� ,wad's �cle ttt ,rr k�
I,lrulrgio.ti-d D;;.n111:9;leu eNUanat even hesttan-tnnef of t.;srcra
aheivt R['@Yh4'f9
27Hrmnns t{mG%sStefvi torewxhel¢ asiwi
pet�ts.-ae .ap
Undeegeourt) v,o Reubtefteavert
ayctrRl n _netr tx pia
_ ttia�"tt+
1 t atm rr afyilas sren n
1"1'1 ri'l7am-ILMmis now di t13w rp^csend Lotml 4HmW10
t n M1ft4A.,anq MM ner:.t�ng r as_afsas�
CrEato oimput Rica tot
ra;��:srs, turit�lis,
ar-d dx-m aanr vmcwnj
Figure 3. Flow of data acquisition and processing.
On-Site Automated Data Processing
Data file collection, network transfer, merging, and processing is coordinated by a "sentinel"
program. It watches for the creation of event-triggered and/or continuously recorded data files on
the different data acquisition nodes (Figure 3). Any source of seismic data can be utilized
providing it resides on the LAN and can be converted to PC-SUDS format. When detected,these
data files are retrieved and put through node-specific batch processing. The data are then brought
into a buffer that holds time-stamped data from the other data acquisition nodes. Time-correlated
data are then merged into a single SUDS file and sent on for further processing. Typical
processing options are shown in the flowchart in Figure 3. Seismic event locations are
continuously updated on a user-interactive graphical display and exported for additional
downstream processing by other user groups.The modular nature of the PC-SUDS utilities and the
flexibility inherent in batch processing give significant user control over the data processing.
EXAMPLE INSTALLATIONS
Willow Creek Mine
A combined surface and underground monitoring system was deployed at the Willow Creek Mine
in Helper, Utah (Figure 4) in an investigation into the mechanics of coal bumps in multipanel
longwall sequences. Preliminary results from this deployment are presented by Ellenberger et al.
(2001). At the level of the mining operation, 12 roof-mounted and two borehole geophones were
installed in the mains and bleeders around the first few panels of a longwall district. Signals were
fed by cable to a data acquisition PC housed in an underground trailer. A network connection to