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