STUDY GOALS RESULTS WESTERN US SE ISMO-ACOUSTIC …
1
THANKS Craig Pearson an d Rod Whitaker (LANL ), Jessie Bonner (Weston Geophys ics),Terry Wallace (UofArizona), Diane Doser (UT El Paso), Phelps -Dodge Morenci and Tyrone, Paul Loeffler (Texas General Land Office). ANMO KNB TXAR NVAR SRU TPNV TUC WMOK WUAZ 120W 110W 100W 30N 40N LANL ST. GEORGE WESTERN US SE ISMO-ACOUSTIC NETWORK Existing Seismo-Acoustic Array Existing In-Mine Seismo-Acoustic Instruments Existing Infrasound Array Infrasound Mini Array Upgrade to Existing Seismic Station Existing Seismic Station Morenci Tyrone TXAR TXAR FORT HANCOCK FORT HANCOCK Fort Hancock NVAR NVAR TYRONE MORENCI P NA P 0.5 2.0 P 1.0 4.0 P 2.0 8.0 P 4.0 16.0 P 8.0 32.0 P 16.0 64.0 P 32.0 -1.0 P 54.0 -1.0 21:36:50 EVENT 1 SEISMIC FREQUENCY CONTENT Time (hr :min:sec) EVENT 1 ACOUSTIC FREQUENCY CONTENT P NA P 0.5 2.0 P 1.0 4.0 P 2.0 8.0 P 4.0 16.0 P 8.0 32.0 P 16.0 64.0 P 32.0 -1.0 P 64.0 -1.0 21:36:50 :55 Time (hr :min:sec) SEISMIC IN-MINE & REG IONAL SEISMIC IN-MINE & REG IONAL DATA W ITH GROUND TRUTH DATA W ITH G ROUND TRUTH ACOUSTIC IN-MINE ACOUSTIC IN-MINE DATA W ITH GROUND TRUTH DATA W ITH G ROUND TRUTH MULTIPLE E XPLOSIVE PATTERNS DETONATED O VER SHORT TIME INTERVALS AS CHARACTER IZED B Y GROUND TRUTH AND IN-MINE OBSE RVATIONS P -7000000 7000000 swmore/BHZ P -7000000 7000000 swmore/BHN P -7000000 7000000 swmore/BHE P -50000 50000 swmore/SD1 P -50000 50000 swmore/SD2 P -50000 50000 swmore/SD3 21:36:45 :55 1 2 3 4 5 6 Event01 Time (hr:min:sec) a 2.04 21:36:49.30 Morenci IN-MINE SE ISMIC IN-MINE SE ISMIC & ACOUST IC & ACOUST IC Pg Pg Pn Lg ANMO 337.1 Pg Pg Pn Lg KNB 536.1 Pg Pn Lg LTX 685.1 Pg Pn Lg MNV 989.4 Pg Pg Pn Lg -100 100 SRU 674.2 Pg Pg Pn Lg TPNV 755.6 Pg Pg Pn Lg TUC 159.8 Pg Pn Lg WMOK 994.6 Pg Pg Pn Lg WUAZ 324.9 P Lg -3000000 3000000 swmore 0.0 19:11:00 :12:00 :13:00 :14:00 :15:00 :16:00 1 2 3 4 5 6 7 8 9 10 Time (hr :min:sec) GROUND TRUTH GROUND TRUTH STUDY GOALS * Esta blish regional seis mo-acoustic net work. * De velop in- mine seis mic and acoustic instru mentation. * Construct ground truth data base of hard rock blasts. * Quantify coupling an d source characterization (seis mic & infrasound). * Quantify seis mic and infrasound propagation pa th effects. RESULTS * Hard rock mines detonate multiple patterns o ver short ti me periods ( 0-60 s) resulting in co mplex regional sig nals. * So me hard rock explosions are detonated with no delays. * Close-in and region al seis mic a mplitudes do not scale with total a mount of explosi ves. * Close-in acoustic a mplitudes do appear to scale with explosi ve size. THANKS THANKS Craig Pearson an d Rod Whitaker (LANL ), Jessie Bonner (Weston Geophys ical), Terry Wallace (U of Arizona), Craig Pearson and Rod Whitaker (LANL ), Jessie Bonner (Weston Geophys ical), Terry Wallace (U of Arizona), Diane Doser (UT El Paso), Phelps -Dodge Morenci and Tyrone, Paul Loeffler (Texas General Land Office). Diane Doser (U T El Paso), Phelps -Dodge Morenci and Tyrone, Paul Loeffler (Texas General Land Office). REGIONAL OBSER VATIONS REGIONAL OBSER VATIONS bz bn be sd1 sd2 sd3 TX01/sz TX02/sz TX03/sz TX04/sz TX06/sz TX07/sz TX08/sz TX09/sz TX10/sz 22:10:00 :12:00 :14:00 Time (hr:min:sec) MULTIPLE FRAGMENTATION SHOTS RECORDED AT MORENCI AND TXAR MORENCI DATA MORENCI DATA TXAR DATA TXAR DATA IN-MINE IN-MINE SEISMIC SEISMIC IN-MINE IN-MINE ACOUSTIC ACOUSTIC TUC SEISMIC AMPLITUDES IN-MINE ACOUSTIC AMPLITUDES IN-MINE ACOUSTIC PERIOD Charge Wt (lb) Charge Wt (lb) Charge Wt (lb) Blast Duration (s) Peak Velocity (mm/s) Peak Velocity (nm/s) Acoustic Period (s) bz bn be sd1 sd2 sd3 21:44:45 :50 :55 :45:00 Time (hr:min:sec) TWO FRAGMENTATION PATTERNS DETONATED SIMULTANEOUSLY IN-MINE IN-MINE SEISMIC SEISMIC IN-MINE IN-MINE ACOUSTIC ACOUSTIC Pattern 1 Pattern 2 1000000 100000 10000 1000 100 10000 200000 400000 600000 0 Acoustic Peak (Pa) 200 100 0 0 1 2 1.2 1.6 0 0.4 0.8 0 200000 400000 600000 0 4 8 12 16 SEISMIC ACOUSTIC Hz Hz Hz Hz Hz Hz Hz Hz Broadband STS-2 Hz Hz Hz Hz Hz Hz Hz Hz 20 Hz Wideband Pg Lg Rg IN-MINE SEISMIC AMPLITUDES Pattern 1 Pattern 2 66 s 0.6 s
Transcript of STUDY GOALS RESULTS WESTERN US SE ISMO-ACOUSTIC …
THANKS
Craig Pearson an d Rod Whitaker (LANL ), Jessie Bonner (Weston Geophys ics),Terry Wallace (UofArizona),
Diane Doser (UT El Paso), Phelps -Dodge Morenci and Tyrone, Paul Loeffler (Texas General Land Office).
ANMO
KNB
TXAR
NVARSRU
TPNV
TUC
WMOK
WUAZ
120W 110W 100W
30N
40N
LANL
ST. GEORGE
WESTERN US SE ISMO-ACOUSTIC NETWORK
Existing Seismo-Acoustic Array
Existing In-Mine Seismo-Acoustic Instruments
Existing Infrasound Array
Infrasound Mini Array Upgrade to Existing Seismic Station
Existing Seismic Station
Morenci
Tyrone
TXARTXARFORT HANCOCKFORT HANCOCK
Fort Hancock
NVARNVAR
TYRONE
MORENCI
P
NA
P
00.5 2.0
P
01.0 4.0
P
02.0 8.0
P
04.0 16.0
P
08.0 32.0P
016.0 64.0P
032.0 -1.0
P
054.0 -1.0
21:36:50
EVENT 1 SEISMIC FREQUENCY CONTENT
Time (hr :min:sec)
EVENT 1 ACOUSTIC FREQUENCY CONTENTP
NA
P
00.5 2.0
P
01.0 4.0
P
02.0 8.0
P
04.0 16.0
P
08.0 32.0
P
016.0 64.0
P
032.0 -1.0
P
064.0 -1.0
21:36:50 :55
Time (hr :min:sec)
SEISMIC IN-MINE & REG IONALSEISMIC IN-MINE & REG IONAL
DATA W ITH GROUND TRUTHDATA W ITH G ROUND TRUTH
ACOUSTIC IN-MINE ACOUSTIC IN-MINE
DATA W ITH GROUND TRUTHDATA W ITH G ROUND TRUTH
MULTIPLE E XPLOSIVE PATTERNS DETONATED O VER SHORT
TIME INTERVALS AS CHARACTER IZED B Y GROUND TRUTH
AND IN-MINE OBSE RVATIONS
P
-7000000
0
7000000
swmore/BHZ
P
-7000000
0
7000000
swmore/BHN
P
-7000000
0
7000000
swmore/BHE
P
-500000
50000swmore/SD1
P
-500000
50000swmore/SD2
P
-500000
50000swmore/SD3
21:36:45 :55
1
2
3
4
5
6
Event01
Time (hr:min:sec)
a 2.04
21:36:49.30
Morenci
IN-MINE SE ISMICIN-MINE SE ISMIC
& ACOUST IC& ACOUST IC
Pg
PgPn Lg
ANMO337.1 Pg
PgPn Lg
KNB536.1
PgPn Lg
LTX685.1
PgPn Lg
MNV989.4
Pg
PgPn Lg-100
0
100SRU674.2
Pg
PgPn Lg
TPNV755.6
Pg
PgPn Lg
TUC159.8
PgPn Lg
WMOK994.6
Pg
PgPn Lg
WUAZ324.9
P
Lg-3000000
0
3000000swmore0.0
19:11:00 :12:00 :13:00 :14:00 :15:00 :16:00
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2
3
4
5
6
7
8
9
10
Time (hr :min:sec)
GROUND TRUTHGROUND TRUTH
STUDY GOALS
* Esta blish regional seis mo-acoustic
net work.
* De velop in- mine seis mic and
acoustic instru mentation.
* Construct ground truth data base of hard rock blasts.
* Quantify coupling an d source
characterization (seis mic &
infrasound).
* Quantify seis mic and infrasound
propagation pa th effects.
RESULTS
* Hard rock mines detonate multiple patterns o ver short ti me periods ( 0-60 s) resulting in co mplex regional sig nals.
* So me hard rock explosions are detonated with no delays.
* Close-in and region al seis mic a mplitudes do not scale with total a mount of explosi ves.
* Close-in acoustic a mplitudes do appear to scale with explosi ve
size.
THANKSTHANKS
Craig Pearson an d Rod Whitaker (LANL ), Jessie Bonner (Weston Geophys ical), Terry Wallace (U of Arizona), Craig Pearson and Rod Whitaker (LANL ), Jessie Bonner (Weston Geophys ical), Terry Wallace (U of Arizona),
Diane Doser (UT El Paso), Phelps -Dodge Morenci and Tyrone, Paul Loeffler (Texas General Land Office).Diane Doser (U T El Paso), Phelps -Dodge Morenci and Tyrone, Paul Loeffler (Texas General Land Office).
REGIONAL OBSER VATIONSREGIONAL OBSER VATIONS
bz
bn
be
sd1
sd2
sd3
TX01/sz
TX02/sz
TX03/sz
TX04/sz
TX06/sz
TX07/sz
TX08/sz
TX09/sz
TX10/sz
22:10:00 :12:00 :14:00
Time (hr:min:sec)
MULTIPLE FRAGMENTATION SHOTS RECORDED AT MORENCI AND TXAR
MO
RE
NC
I DA
TA
MO
RE
NC
I DA
TA
TX
AR
DA
TA
TX
AR
DA
TA
IN-M
INE
IN
-MIN
E
SE
ISM
ICS
EIS
MIC
IN-M
INE
IN-M
INE
AC
OU
ST
ICA
CO
US
TIC
TUC SEISMIC AMPLITUDES
IN-MINE ACOUSTIC AMPLITUDES
IN-MINE ACOUSTIC PERIOD
Charge Wt (lb)
Charge Wt (lb)
Charge Wt (lb)
Blast Duration (s)
Pea
k V
eloc
ity (
mm
/s)
Pea
k V
eloc
ity (
nm/s
)
Aco
ustic
Per
iod
(s)
bz
bn
be
sd1
sd2
sd3
21:44:45 :50 :55 :45:00Time (hr:min:sec)
TWO FRAGMENTATION PATTERNS DETONATED SIMULTANEOUSLY
IN-M
INE
IN-M
INE
SE
ISM
ICS
EIS
MIC
IN-M
INE
IN-M
INE
AC
OU
ST
ICA
CO
US
TIC
Pattern 1
Pattern 2
100000010000010000
1000
100
10000
200000 400000 6000000
Aco
ustic
Pea
k (P
a)
200
100
0
0 1 2
1.2
1.6
0
0.4
0.8
0 200000 400000 6000000
4
8
12
16
SEISMIC
ACOUSTIC
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Broadband STS-2
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
20 HzWideband
PgLgRg
IN-MINE SEISMIC AMPLITUDES
Pattern 1 Pattern 2
66 s0.6 s
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