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Don
gmin
wan
gR
esea
rch
Inst
itute
of C
oncr
ete
and
Ecom
ater
ials
Chi
na U
nive
rsity
of M
inin
g &
Tech
nolo
gy(B
eijin
g)20
15.0
5.06
Prep
arat
ion
and
Prop
erty
of F
ly A
sh/C
oal
Gan
gue
Min
e B
ackf
illin
g M
ater
ial
2015
Wo
rld
of
Co
al A
sh (
WO
CA
) C
on
fere
nce
in N
asvh
ille,
TN
- M
ay 5
-7, 2
015
htt
p:/
/ww
w.f
lyas
h.in
fo/
OU
TLIN
E
1.In
trodu
ctio
n
2.M
ater
ials
and
exp
erim
ent
3.Th
e m
ix d
esig
n an
d pr
oper
ties
rese
arch
of
back
fillin
g m
ater
ials
bas
ed o
n C
LSM
4.Th
e tri
al a
nd o
n-si
te e
xper
imen
t and
feas
ibilit
y
anal
ysis
of C
LSM
bac
kfilli
ng m
ater
ials
In
Chi
na ,
Coa
l acc
ount
s fo
rabo
ut 6
5%in
the
stru
ctur
e of
pr
imar
y en
ergy
C
hina
pow
erso
urce
mai
nly
dom
inat
ed b
y th
erm
al p
ower
pl
ants
,m
ore
than
70%
.
Coa
l min
ing
and
utiliz
atio
npr
oduc
e a
larg
e nu
mbe
r of
coa
lcom
bust
ion
prod
ucts
(CC
PS, m
ainl
yco
al g
angu
e,fly
as
h an
dgy
psum
) Chi
nese
ener
gyst
ruct
ure
in 2
015
1 In
trod
uctio
n
64%
1%
8%5%
2%4%10
%6%
coal
natu
ral g
as
gaso
line
dies
el
lique
fied
petro
leum
gas
othe
r pet
role
um p
rodu
cts
elec
trici
ty
othe
rs
1 In
trod
uctio
n
The
harm
toth
een
viro
nmen
tin
the
Coa
lmin
ing
and
utiliz
atio
n:
The
dest
ruct
ion
and
occu
patio
nof
land
reso
urce
s
The
dest
ruct
ion
and
pollu
tion
ofw
ater
reso
urce
So
lidw
aste
and
was
tega
spo
llutio
n
The
outp
utof
fly
ash
and
utiliz
atio
n ra
te in
Chi
na
Acco
rdin
g to
the
stat
istic
sof
the
stat
e-ow
ned
key
coal
min
es,c
oal r
esou
rces
und
er th
ree
loca
tions
( vill
age,
railw
ay a
nd re
serv
oir)
is re
lativ
ely
com
mon
,the
prov
en
“und
er th
ree”
coa
lis
abou
t13.
79 b
illio
nt.
They
sho
uld
been
bac
kfill
to p
reve
nt th
e se
ttlem
ent o
f the
gro
und.
1 In
trod
uctio
n
dire
ctly
use
dun
der t
hree
loca
tions
91%
9%
1 In
trod
uctio
n
The
adva
ntag
e of
bac
kfill
ing
tech
niqu
e:
gl
obal
env
ironm
enta
l pro
tect
ion
and
ener
gy re
serv
atio
n
de
al w
ith a
larg
e nu
mbe
r of c
oal r
esou
rces
from
thre
e
loca
tions
ac
hiev
e th
e ef
fect
ive
utiliz
atio
n of
coa
l gan
gue,
coa
l ash
and
othe
r sta
ble
coal
was
te.
Fillin
g m
inin
g as
one
of e
nviro
nmen
t-frie
ndly
coa
l min
ing
met
hods
, whi
ch c
an m
ake
full
use
of s
olid
was
te, i
ncre
ase
the
reco
very
rate
of c
oal r
esou
rces
, de
crea
se o
r eve
n el
imin
ate
the
nega
tive
influ
ence
caus
ed b
y st
able
was
te e
mis
sion
1 In
trod
uctio
n
Shan
xi
Gao
yang
coal
min
e fil
ling
stat
ion
Fillin
g m
inin
g te
chno
logy
Filli
ng m
inin
g te
chno
logy
Insu
ffici
ent
dry
stow
ing
Com
plex
proc
ess,
low
effic
ienc
y,la
bor
dem
and,
high
cost
,low
prod
uctiv
ity
hydr
aulic
fillin
gC
ompl
expr
oces
s,sm
all
amou
ntof
fillin
g,w
ater
leak
age,
low
stre
ngth
Cem
ente
d ta
ilings
fillin
glo
wco
ncen
tratio
n, la
yere
d,
Qua
litat
ive
diffe
renc
e, h
igh
cost
Full
tailin
gsce
men
ted
fillin
g w
ith
high
den
sity
Com
plex
proc
ess、
high
cost
Past
e pu
mpi
ng fi
lling
Easy
jam
Hig
h w
ater
sol
idify
ing
fillin
gSt
rict
requ
irem
ents
ofra
wm
ater
ials、
high
cost
Con
trolle
d Lo
w S
treng
th M
ater
ial
(CLS
M)
1 In
trod
uctio
n
Con
trol
led
Low
Str
engt
h M
ater
ial (
CLS
M)
CLS
Mis
def
ined
as
aco
mpr
essi
ve s
treng
thin
8.3
Mpa
(120
0psi
) or e
ven
low
erm
ater
ial b
yU
SAAC
I 116
R, w
ith
high
liqui
dity
, und
er th
e ac
tion
of g
ravi
tyw
ithou
t or l
ittle
vib
ratio
n,
can
befil
led,
the
form
atio
n of
self
com
pact
ing
stru
ctur
e, to
repl
ace
the
tradi
tiona
lbac
kfill
mat
eria
l.
1 In
trod
uctio
n
The
adva
ntag
es o
fCLS
M in
Min
e fil
ling
min
ing
Adva
ntag
es
Sim
ple
proc
ess
and
syst
emH
igh
effic
ienc
yLo
w c
ost
1 In
trod
uctio
n
CLS
M
Sele
ctio
n of
ra
w m
ater
ialsM
ix d
esig
n an
d pr
oper
ty re
sear
ch
Add
itive
Feas
ibil
ity
anal
ysis
1 In
trod
uctio
n
Res
earc
h co
nten
t:
2 Ma
teri
als
Tabl
e 2.
1 C
hem
ical
com
posi
tions
and
min
eral
com
posi
tions
of c
emen
t, w
t%
Setti
ng ti
me
(min
)C
ompr
essi
ve st
reng
th
(MPa
)Fl
exur
al st
reng
th (M
Pa)
Fine
ness
(%
)St
anda
rdco
nsis
ten
cy w
ater
(%)
initi
alfin
al3d
28d
3d28
d
230
380
22.8
49.4
4.9
8.8
2.3
24.9
Tabl
e 2.
2 T
he m
ain
phys
ical
pro
perti
es o
f cem
ent
CaO
SiO
2A
l 2O3
MgO
Fe2O
3Ti
O2
SO3
Loss
Tota
lC
3SC
2SC
C4A
FR
2OTo
tal
59.6
520
.20
7.83
3.41
3.46
0.40
2.25
1.65
99.8
547
.06
23.1
98.
8710
.46
0.76
90.3
4
Al 2O
3Si
O2
SO3
K2O
CaO
TiO
2Fe
2O3
Loss
Tota
l
26.7
347
.39
0.55
1.17
1.54
1.63
4.51
16.1
799
.39
Tabl
e 2.
3 C
hem
ical
com
posi
tions
of F
ly A
sh, w
t%
2 Ma
teri
als
Al 2O
3Si
O2
SK
2OC
aOTi
O2
Fe2O
3Lo
ssTo
tal
18.6
833
.59
2.97
0.66
18.0
51.
094.
0819
.76
98.8
8
Tabl
e 2.
4 C
hem
ical
com
posi
tions
of c
oal g
angu
e , w
t%
NO
.Sc
reen
size
/mm
Siev
e re
sidu
e /%
Aver
age
resi
dual
s /%
14.
7526
.8
30.6
24.
7536
.43
4.75
30.6
44.
7528
.85
4.75
30.4
Table2.5
The
cum
ulat
ive
scre
en a
naly
sis o
f coa
l gan
gue
2 Ma
teri
als
Test
item
sSc
reen
size
/mm
Tota
lFi
nene
ss
mod
ulus
4.75
2.36
1.18
0.60
0.30
0.15
botto
m
Siev
ere
sidu
e /g
0.00
159.
1010
8.00
80.3
066
.47
31.6
653
.90
499.
433.
38C
umul
ativ
eva
lue
/%0.
0031
.86
53.4
869
.56
82.8
789
.21
10.7
933
7.77
Siev
ere
sidu
e /g
0.00
157.
4611
7.57
81.5
866
.67
30.2
045
.99
499.
473.
43C
umul
ativ
eva
lue
/%0.
0031
.53
55.0
671
.40
84.7
590
.79
9.21
342.
73
Siev
ere
sidu
e /g
0.00
146.
6810
7.30
83.3
969
.65
34.2
552
.08
493.
353.
32C
umul
ativ
eva
lue
/%0.
0029
.73
51.4
868
.38
82.5
089
.44
10.5
633
2.10
Siev
ere
sidu
e /g
0.00
161.
1310
8.97
78.0
565
.64
32.9
451
.65
498.
383.
39C
umul
ativ
eva
lue
/%0.
0032
.33
54.2
069
.86
83.0
389
.64
10.3
633
9.41
Tabl
e 2.
6 T
he c
umul
ativ
e sc
reen
ana
lysi
s of c
oal g
angu
e sa
nd
2 Ma
teri
als
Admi
xtur
e
Waterreducer:
sodium
lignosulfonate,naphthalene
Suspending
agent:
HPMC
Coagulation
agents
:NaCl,
Na2CO 3,
Al2(SO
4)3,
NaAlO 2,
CoagulantA,
CoagulantB
3 T
he o
ptim
izat
ion
of C
LSM
’s m
ixtu
re p
ropo
rtio
n
3.
1B
inde
r-agg
rega
tera
tio
NO
.C
emen
tFA
Gan
gue
Wat
erW
/BB
/AC
emen
t :FA
Bul
k de
nsity
119
038
014
2545
50.
80.
41:
224
502
190
380
1140
455
0.8
0.5
1:2
2165
319
038
095
045
50.
80.
61:
219
75
419
038
081
545
50.
80.
71:
218
40
519
038
071
045
50.
80.
81:
217
35
Table3.1
The
mix
ture
of d
iffer
ent b
inde
r-agg
rega
te ra
dio
Not
e: in
this
pap
er, W
/B =
wat
er-b
inde
r rat
io; B
/A=
bind
er-a
ggre
gate
ratio
; bi
nder
= c
emen
t + fl
y as
h.
3 Th
e op
timiz
atio
n of
CLS
M’s
mix
ture
pro
port
ion
34567891011
0.4
0.5
0.6
0.7
0.8
140
160
180
200
220
240
260
280
300
B/A
Slump/mm
480
500
520
540
560
580
600
620
640
660
Divergence/mm
Bleeding rate/% S
lum
p D
iver
genc
e B
leed
ing
rate
0.4
0.5
0.6
0.7
0.8
0123456
3d
7d
28d
B/A
Compression strength/MPa
Fig.
3. 1
The
influ
ence
of b
inde
r-agg
rega
te ra
dio
on C
LSM
’s w
orka
bilit
y
Fig
3.2
The
influ
ence
of b
inde
r-agg
rega
te o
n C
LSM
’s c
ompr
essi
ve s
treng
th
W
ithth
ein
crea
sing
bind
er-a
ggre
gate
ratio
,the
loss
ofsl
umps
isbe
com
ing
larg
er;
the
com
pres
sion
stre
ngth
incr
ease
s;
the
flow
abilit
yis
bette
r.M
eanw
hile
,th
ede
gree
ofse
greg
atio
nan
dbl
eedi
ngbe
com
esm
ore
serio
us
Inco
nclu
sion
,th
epr
oper
ties
ofC
LSM
isth
ebe
stw
hen
the
bind
er-a
ggre
gate
ratio
is0.
6
3.2
Wat
er-b
inde
rrat
io
3 Th
e op
timiz
atio
n of
CLS
M’s
mix
ture
pro
port
ion
NO
.C
emen
tFA
Gan
gue
Wat
erW
/BB
/AC
emen
t :F
AB
ulk
dens
ity
619
038
095
034
00.
60.
61:
218
60
719
038
095
040
00.
70.
61:
219
20
819
038
095
045
50.
80.
61:
219
75
919
038
095
051
50.
90.
61:
220
35
1019
038
095
057
01.
00.
61:
220
90
Table3.2Themixtureofdifferentw
ater‐binderradio
024681012
Bleeding rate/% 0.6
0.7
0.8
0.9
1.0
050100
150
200
250
300
W/B
Slump/mm
300
350
400
450
500
550
600
650
700
Divergence/mm
Slu
mp
Div
erge
nce
Ble
edin
g ra
te
0.6
0.7
0.8
0.9
1.0
012345678
Compression strength/MPa
W/B
3d
7d
28d
Fig.
3. 3
The
influ
ence
of w
ater
-bin
der r
adio
on
CLS
M’s
wor
kabi
lity
Fig.
3. 4
The
influ
ence
of w
ater
-bin
der r
adio
on
CLS
M’s
com
pres
sive
stre
ngth
W
ith th
e in
crea
se o
f wat
er-b
inde
r rat
io, t
he lo
ss o
f slu
mps
of
CLS
M d
ecre
ases
and
the
dive
rgen
ce a
nd th
e bl
eedi
ng
rate
incr
ease
, the
com
pres
sion
stre
ngth
of C
LSM
in d
iffer
ent
agei
ng p
erio
d al
l dec
reas
es
In c
oncl
usio
n, C
LSM
has
rela
tivel
y go
od p
rope
rtie
s w
hen
the
wat
er-b
inde
r rat
io o
f CLS
M is
0.8
.
3 Th
e op
timiz
atio
n of
CLS
M’s
mix
ture
pro
port
ion
3.3
The
dosa
geof
flyas
h
3 Th
e op
timiz
atio
n of
CLS
M’s
mix
ture
pro
port
ion
NO
.C
emen
tFl
y as
hG
angu
eW
ater
W/B
B/A
Cem
ent
:FA
Bul
k de
nsity
1128
528
595
045
50.
80.
61:
119
75
1222
834
295
045
50.
80.
61:
1.5
1975
1319
038
095
045
50.
80.
61:
219
75
1416
340
795
045
50.
80.
61:
2.5
1975
1514
242
895
045
50.
80.
61:
319
75
Tabl
e 3.
3 T
he m
ixtu
re o
f diff
eren
t con
tent
of
Fly
Ash
3 Th
e op
timiz
atio
n of
CLS
M’s
mix
ture
pro
port
ion
1:1
1:1.
51:
21:
2.5
1:3
234567891011
120
140
160
180
200
220
240
260
280
300
Slump/mm
400
450
500
550
600
650
700
Divergence/mm
Bleeding rate/%
Slum
p D
iver
genc
e B
leed
ing
rate
Cem
ent-F
ly a
sh ra
tio1:
11:
1.5
1:2
1:2.
51:
3
12345678
Compression strength/MPa
Cem
ent-F
ly a
sh ra
tio
3d
7d
28d
Fig.
3.5
The
influ
ence
of F
ly A
sh c
onte
nt o
n C
LSM
’s w
orka
bilit
yFi
g. 3
.6 T
he in
fluen
ce o
f Fly
Ash
con
tent
on
CLS
M’s
com
pres
sive
stre
ngth
W
ith th
e in
crea
se o
f the
ratio
of f
ly a
sh m
ixtu
re, t
he s
lum
ps, t
he
dive
rgen
ce a
nd th
e bl
eedi
ng ra
te d
ecre
ase
whe
n th
e to
tal m
ass
of c
emen
t and
fly
ash
rem
ains
unc
hang
ed a
nd th
e co
mpr
essi
on
stre
ngth
dec
reas
es
In c
oncl
usio
n, o
vera
ll pr
oper
ties
of C
LSM
is re
lativ
ely
good
and
the
cost
ing
is re
lativ
ely
low
with
1:2
cem
ent-f
ly
ash
ratio
.
3 Th
e op
timiz
atio
n of
CLS
M’s
mix
ture
pro
port
ion
3.4
Adm
ixtu
reIte
mIn
dex
Flui
dity
Hig
her f
luid
ity,
No
loss
or s
light
ly lo
sses
with
in 2
hou
rs
Wor
kabi
lity
No
blee
ding
, set
tlem
ent a
nd st
eak
phen
omen
on
Setti
ng ti
me
<10
h
Tabl
e 3.
4 M
ater
iali
ndex
ofc
oal m
ine
back
fillin
gen
gine
erin
g
Cem
ent(
kg/m
³)Fl
y as
h(kg
/m³)
Gan
gue(
kg/m
³)W
ater(
kg/m
³)
190
380
950
455
Tabl
e 3.
5 T
he m
ixtu
re o
f CLS
M
3 Th
e op
timiz
atio
n of
CLS
M’s
mix
ture
pro
port
ion
Dos
age/
%N
O.
Susp
endi
ng
agen
tso
dium
lig
nosu
lfona
teN
apht
hale
ne
NaC
lA
l 2(SO
4)3
Na 2
CO
3N
aAlO
2C
oagu
lant
A
Coa
gula
nt
B
10.
072
0.07
0.5
30.
070.
50.
54
0.07
0.5
0.7
50.
070.
51
60.
070.
50.
47
0.07
0.5
0.03
80.
070.
50.
039
0.07
0.5
100.
070.
50.
511
0.07
0.5
0.7
120.
070.
51
130.
070.
50.
414
0.07
0.5
0.03
150.
070.
50.
03
Tabl
e 3.
6 T
he m
ix p
ropo
rtion
of a
dmix
ture
Tabl
e 3.
6 T
he m
ix p
ropo
rtion
of a
dmix
ture
3 Th
e op
timiz
atio
n of
CLS
M’s
mix
ture
pro
port
ion
Tabl
e 3.
6 T
he m
ix p
ropo
rtion
of a
dmix
ture
12
34
56
78
050100
150
200
250
300
Slump/mm
NO
. initi
al ti
me
afte
r 1h
afte
r 2h
12
34
56
78
0510152025303540
Setting time/h
NO
.
910
1112
1314
15050100
150
200
250
300
350
initi
al ti
me
afte
r 1h
afte
r 2h
slump/mm
NO
.9
1011
1213
1415
05101520
Setting time/h
NO
.
Fig.3.6Theinfluence
ofadm
ixtureonthe
workabilityandsetting
timeofCLSM
NO
.1
23
45
67
89
1011
1213
1415
Initi
alno
nono
nono
nono
nono
nono
nono
nono
1hno
little
mid
dle
nono
nolit
tlelit
tlelit
tlem
iddl
eno
nono
little
little
2hno
mid
dle
serio
usno
nono
mid
dle
mid
dle
mid
dle
serio
usno
nono
mid
dle
mid
dle
Tabl
e 3.
7 T
he s
ettle
men
t of C
LSM
Af
ter a
ddin
g N
aCl,
the
flow
bilit
yof
CLS
M a
nd th
e flo
wbi
lity
pers
iste
nce
beco
mes
bet
ter a
nd th
e co
nden
se ti
me
beco
mes
sh
orte
r
Addi
ng c
oagu
latio
n ac
cele
rato
r A a
nd B
no o
bvio
us e
ffect
on
the
flow
bilit
yw
hen
the
cond
ensa
tion
time
is re
lativ
ely
shor
ter,
whi
le th
e ef
fect
of c
oagu
latio
n ac
cele
ratin
g of
Bis
app
aren
tly
bette
r tha
n A
Ad
ding
nap
htha
lene
perfo
rms
bette
r tha
n ad
ding
sod
ium
lig
nosu
lfona
te
3 Th
e op
timiz
atio
n of
CLS
M’s
mix
ture
pro
port
ion
In c
oncl
usio
n, w
e co
mpo
und
deflo
ccul
ant,
naph
thal
ene,
NaC
lan
d co
agul
atio
n ac
cele
rato
r B
3 Th
e op
timiz
atio
n of
CLS
M’s
mix
ture
pro
port
ion
编号
Susp
endi
ng
agen
t N
apht
hale
ne
NaC
lC
oagu
lant
B
160.
090
00
170.
090.
50.
50.
0318
0.09
0.3
0.5
0.03
190.
090.
10.
50.
0320
0.09
00.
50.
03
Table3.8Themixproportionofadm
ixture,wt%
3 Th
e op
timiz
atio
n of
CLS
M’s
mix
ture
pro
port
ion
1617
1819
20050100
150
200
250
300
Slump/mm
NO.
initi
al tim
e af
ter 1h
after
2h
1617
1819
20048121620
Setting time/hNO
.
Fig.
3. 7
The
influ
ence
of
adm
ixtu
re o
n th
e w
orka
bilit
y an
d se
tting
tim
e of
CLS
M
Th
e flo
wbi
lity
decr
ease
san
d th
e co
nden
satio
n tim
e in
crea
ses
all s
light
ly, w
ith th
e de
crea
se o
f the
dos
age
of n
apht
hale
ne
The
orig
inal
flow
bilit
yde
gree
, 2h
slu
mps
and
the
cond
ensa
tion
time
is 2
00m
m, 1
80m
m a
nd 1
0h re
spec
tivel
y w
ith a
ddin
g N
aCl,
deflo
ccul
anta
nd c
oagu
latio
n B
but n
o na
phth
alen
e
CLS
M d
oes
not s
ettle
in 2
h
CLS
M(k
g/m
³)A
dmix
ture
(kg/
t)
Cem
ent
Fly
ash
Gan
gue
Wat
erA
dmix
ture
Susp
endi
ng a
gent
NaC
lC
oagu
lant
B
Wat
er
190
380
950
445
11.4
4525
015
690
Fina
lly, t
he la
st fi
lling
slur
ry c
ompo
sitio
n pe
rcen
tage
and
adm
ixtu
re
com
posi
tion
corp
orat
ion
is sh
own
in ta
ble
3.9
3 Th
e op
timiz
atio
n of
CLS
M’s
mix
ture
pro
port
ion
Tabl
e 3.
9Th
e m
ixtu
re o
f CLS
M a
nd A
dmix
ture
Not
e: a
ccor
ding
to ta
ble
3.9
mak
es a
solid
con
tent
of a
dmix
ture
is 3
1%, w
hen
used
in
CLS
M th
e do
sage
is 2
% o
f the
tota
l con
tent
of b
inde
r (fly
ash
and
cem
ent).
4Th
efe
asib
ility
anal
ysis
ofC
LSM
used
inm
ine
fillin
gen
gine
erin
g
4.1Looptest
Fig
4.1
Diff
eren
tial p
ress
ure
gaug
eFi
g. 4
.2 D
iffer
entia
l pre
ssur
e ga
uge
4Th
efe
asib
ility
anal
ysis
ofC
LSM
used
inm
ine
fillin
gen
gine
erin
g
4.1Looptest
Fig.
4.3
For
cing
and
del
iver
y sy
stem
Fig.
4.4
Con
trol s
yste
m
4Th
efe
asib
ility
anal
ysis
ofC
LSM
used
inm
ine
fillin
gen
gine
erin
g
No.
Cem
ent
Fly
ash
Gan
gue
Wat
erA
dmix
ture
119
038
095
043
511
.4
219
038
095
044
511
.4
319
038
095
045
511
.4
Tabl
e 4.
1 T
he m
ixtu
re o
f CLS
M (k
g/m
³)
Th
e pi
pelin
e’s
calib
er is
150
mm
and
base
d on
the
plan
t of
fillin
g pi
pelin
e, th
e ap
prox
imat
e be
ndin
g is
set
with
the
tota
l pip
elin
e le
ngth
bei
ng 7
2m.
th
e ra
te o
f CLS
M is
set
as
1.31
m/s
, whi
ch m
eans
the
flow
Q
=πD
2v/4
=83.
34m
3/h≈
85m
3 /h w
ith th
e ra
te b
eing
1.
34m
/s.
4Th
efe
asib
ility
anal
ysis
ofC
LSM
used
inm
ine
fillin
gen
gine
erin
g
235
240
245
250
255
192021222324252627 Straight pipe pressure loss dp1(KPa
Wat
er (
)kg
/m3
dp1=1
09.3
0583
-0.3
525w
R=0.
99
235
240
245
250
255
2.4
2.6
2.8
3.0
3.2
3.4
Elbow Pressure loss dp2(KPa)
Wat
er(k
g/m
3)
dp2=1
3.61
-0.0
44w
R=0
.98
Fig
4.5
The
influ
ence
of w
ater
on
dp1
Fig
4.6
The
influ
ence
of w
ater
on
dp2
the
loss
of p
ress
ure
of s
traig
ht a
nd c
urve
d pi
pe a
ll lin
eral
yde
crea
se w
ith th
e in
crea
se o
f w
ater
usa
ge w
ater
By fi
tting
the
data
of l
oop
test
, it i
s go
t tha
t the
fo
rmul
a to
cal
cula
te th
e lo
ss o
f stra
ight
pip
e pr
essu
re d
p1 a
nd w
ater
usa
ge w
ater
with
the
loss
of
stra
ight
pip
e pr
essu
re d
p1 a
nd th
e lo
ss o
f cu
rved
pip
e pr
essu
re d
p2:
dp1=
109.
3058
3-0.
3525
wdp
2=13
.61-
0.04
4w
4Th
efe
asib
ility
anal
ysis
ofC
LSM
used
inm
ine
fillin
gen
gine
erin
g
4Th
efe
asib
ility
anal
ysis
ofC
LSM
used
inm
ine
fillin
gen
gine
erin
g
Plac
eSh
anxi
Xin
yang
coal
min
e
The
pipe
line
syst
em
180m
min
ner d
iam
eter
sea
mle
ss s
teel
tube
vol
tage
to
tal l
engt
h is
2700
m, t
he fa
rthes
t dis
tanc
e is
350
0m
40
mon
the
grou
nd, 2
60m
ver
tical
pip
esth
ein
no.
2 w
ell
un
der t
he b
otto
m h
ole
to th
ree
conc
entra
ted
lane
160
0 m
, con
cent
rate
d la
ne le
ngth
is 8
00 m
, alo
ng th
e gr
oove
le
ngth
is 6
00 m
, wor
king
face
pip
ing
and
drai
n ro
ad is
20
0mTh
e pu
mpi
ng
syst
emH
GBS
200
pis
ton
pum
p, o
utle
t pre
ssur
e of
14
MPa
, 15
0m3/
hth
e to
tal l
oss
of
pres
sure
(dp)
<5.
19 K
Pa
Tabl
e 4.
2 En
gine
erin
g O
verv
iew
of f
illing
4.2
Feas
ibili
ty a
naly
sis
4Th
efe
asib
ility
anal
ysis
ofC
LSM
used
inm
ine
fillin
gen
gine
erin
g
Fig
4.7
Con
troll
syst
emFi
g 4.
8Fi
lling
pum
p
In lo
op te
st:
4Th
efe
asib
ility
anal
ysis
ofC
LSM
used
inm
ine
fillin
gen
gine
erin
g the workability of pis
ton pump
85m3/h
the diameter of pi
peline
150mm
the flow rate of CLSM
in pipeline
1.34m/s
water usage
235k
g/m³
245k
g/m³
255k
g/m³
the loss of straig
ht pipe pressure
—23.20KPa
—
the loss of elbo
w pipe pressure
—2.79KPa
—
the distance of
straight pipe
—10
m—
the distance of
elbow pipe
—1m
—
the
tota
l lo
ss o
f pr
ess
ure(
dp)
2.69
KPa/
m2.
36KP
a/m
1.97
KPa/
m
Not
e: d
p=(2
3.20
+2.7
9)/(1
0+1)
=2.3
6KPa
/m (w
hen
wat
er u
sage
is 2
45kg
/m³)
4Th
efe
asib
ility
anal
ysis
ofC
LSM
used
inm
ine
fillin
gen
gine
erin
g
W
hen
wat
er is
235
-255
kg/m
³,dp <
5.19
, Bes
ides
, the
flow
ra
te o
f CLS
M c
hose
n in
loop
test
is la
rger
that
that
set
in
min
ing
engi
neer
ing
Th
e pr
oper
CLS
M le
ads
to e
xcel
lent
flow
bilit
y, g
ood
wor
kabi
lity,
no
isol
atio
n, g
ood
pum
p ab
ility.
Mea
nwhi
le, t
he
good
sta
tus
can
rem
ain
for 2
h at
leas
t and
the
cond
ensa
tion
time
of C
LSM
is lo
wer
than
10h
The
prop
ertie
s of
CLS
M c
an s
atis
fy th
e re
quire
men
ts o
f fill
ing
in m
any
form
s, a
pply
ing
CLS
M to
min
ing
fillin
g is
feas
ibili
ty