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Seismic ~lonitorinl; Network at Bo+vic Rcsaurcc+ Lun~++:(II Coal ~linc <br />Objcetivc: t)epluy sctsmic nwniuxing array to provide continuous nteasurc of sctsmic <br />activity in the vicinity of past, present, and future lungwall mining activity. Collect data <br />to investigate empirical ground nuxxm relations. <br />:\rca Covered: :\rca bounded by f luhhard ('reek tin the cast, l~crrur Creek on the west, <br />l error (Trek reservoir on the north. and annnv road 13? tin the south. <br />Seisnu,lot;c Basics Discrete gnnutd adjustments that occur during mining generate <br />seismi: ,, a, es that ore derectcd and recorded by an ^rrty oFseismic sensors. <br />t\9easurentent of trlanve arrival times o(setsmic waves at dit7erent seismic stations <br />pn,vides the basic data needed to calculate "event" locations. A realistic seismic velocity <br />model of the region must he constructed t'or use in the location rtlcuL•uions. Recording <br />and analyzing ful I seismic +vavefomts allows magnitude, ur other ntcasures o(strcngth. to <br />be cslint,ried. <br />\eh+ork Nunitnrinx ('oncept: titandard hardware and soRware methods of canhquakc <br />scFsn,~,luw ,ire ;ipplie~t. Rcntotr. solar-powered, seismometer stations continuously <br />rea,rd ;uul tr:msnut .eismic waves via radio to computers residing on a closed kx:al-area <br />network i L;\V I. Ka+c data and,or processed results can then he made available to other <br />networks via wntn,lled access. Vet+vorks ot'this design are readily anten:dilc to <br />expansion by incorporation of additional stations that arc accessible via clascd LAN, <br />virtual private network (\'PN1 ur public Intcmet. NIOSH has developed similar <br />distrihuted seismic acquisninn and processing methods (e.g. S+vanson et al.,_QI13) and <br />applied them in mine satin research studies employing high-frequency "microseismic" <br />monitoring. With the larger coverage area ot'the present network, higher t'requencies get <br />attenuated sa conventional hardware, wnh lower data sampling carts, is employed. <br />ticismic titations: Kincntctrics <br />triaxwl I.pilcnsor strong-motion <br />accelerumetcrs with Altus K2 data <br />recorders. A fi~urth channel in the <br />K2 units allows an addilion;d co- <br />lnratcd moving-coil scismonutcr <br />11_•3, Serccl Inc) to also he recorded, <br />providing higher sensitivity to <br />smaller and:'or more distant seismic <br />events. Sampling rate ItN) samples <br />per second. GPS tints <br />svnchronizatiun. local event <br />recording and continuous data <br />streaming. <br />