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<br /> On-Si!e Automated rim L~,a <br /> Data PrnCessing <br /> oev»na IK9~ <br />Pr suOS Daa <br />AGp»~aell E. t[t dbcmn <br /> kc»fre Iavr Nfa <br /> 'WIe ~r~nt fid <br />Surf~oe dlcaa WtiO BE <br />``-~'~I•t tmr coe.n 9acSasa rdbona <br /> <br /> Pa nna MnW +.mr rre drsa <br />19~~ .~Li~v~ IafvfilN QlU1'~ <br />~ V.wY.laT1 <br /> mm n.. I.c«a. ardvvr~umin t] <br />UIMMOroWi thTlll'.F'IO fR91G ~ 60I~4L011 TlNAd1 ~ <br />rre!~I-1 <br /> Qell llnelJpGSL OY01~11~»fWal/MtOCYJOM1 <br /> v.plx..rno <br />LllealQlOW1a <br />MrrtTIM /Ri~YW ~aEmatl Vii <br />?MIQr Of COM' <br /> <br /> Ex¢m aunm®y »Iwaeano <br /> <br /> s.lmnd pmp.m-mnbcla »mr Invoasa.e <br />elaa, l>H m~a ann aam wcu+un4 tool ms mrnon <br />rear--eua»oo- <br /> <br /> Clem olawn rAes Ia <br />ersdnca, C++A lunextn, <br />i~ i1.~Cleile pacwYn{ <br /> Figure 3. Flow of data acquisition a nd processing. <br />OnSite Automated Data Processing <br /> <br />wewel~.rclo <br />IpC>~ <br />t~~~»~ <br />Data file collection, network transfer, merging, and processing is coordinated by a "sentinel" <br />program. It watches for the creation of event-triggered and/or continuously recorded data files on <br />[he different data acquisition nodes (Figure 3). Any source of seismic data can be utilized <br />providing it resides on the LAN and can be converted to PC-SUDS format. When detected, these <br />data files are retrieved and put through node-specific batch processing. The data are then brought <br />into a buffer that holds time-stamped data from [he other data acquisition nodes. Time-correlated <br />data are [hen merged into a single SUDS file and sent on for further processing. Typical <br />processing options are shown in the flowchart in Figure 3. Seismic even[ locations are <br />continuously updated on a user-interactive graphical display and exported for additional <br />downstream processing by other user groups. The modular nature of the PC-SUDS utilities and the <br />flexibility inherent in batch processing give significant user control over the data processing. <br />EXAMPLE INSTALLATIONS <br />Willow Creek Mine <br />A combined surface and underground monitoring system was deployed at [he Willow Creek Mine <br />in Helper, Utah (Figure 4) in an investigation into the mechanics of coal bumps in mul[ipanel <br />longwall sequences. Preliminary results from this deployment are presented by Ellenberger et al. <br />(2001). At the level of the mining operation, 12 roof-mounted and two borehole geophones were <br />installed in the mains and bleeders around the first few panels of a longwall district. Signals were <br />fed by cable [o a data acquisition PC housed in an underground trailer. A network connection to <br />