Performance of cemented coal gangue backfill

被引：52

作者：

Zhang Qin-li ^{[1
]}

Wang Xin-min ^{[1
]}

机构：

[1] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY | 2007年 / 14卷 / 02期

基金：

中国国家自然科学基金;

关键词：

coal gangue; fill; strength; theological properties; mechanism;

D O I：

10.1007/s11771-007-0043-y

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Possibility of cemented gangue backfill was studied with gangue of Suncun Coal Mine, Xinwen Coal Group, Shandong, and fly ash of nearby thermal power plant, in order to treat enormous coal gangue on a large scale and to recovery safety coal pillars. The results indicate that coal gangue is not an ideal aggregate for pipeline gravity flow backfill, but such disadvantages of gangue as bad fluidity and serious pipe wear can be overcome by addition of fly ash. It is approved that quality indexes such as strength and dewatering ratio and piping feature of slurry can satisfy requirement of cemented backfill if mass ratio of cement to fly ash to gangue is 1:4:15 and mass fraction of solid materials reaches 72%-75%. Harden mechanism suggests that the cemented gangue fill has a higher middle and long term comprehensive strength.

引用

页码：216 / 219

页数：4

共 15 条

[1]

Aiqin L., 2004, CHINE RESOUR COMPRE, V2, P11

[2]

CAI MH, 1999, COAL MINE ENV PROTEC, V13, P47

[3]

[曹建军 Cao Jianjun], 2004, [环境污染治理技术与设备, Techniques and equipment for environmental pollution control], V5, P19

[4]

HU ZP, 2004, FLY ASH COMPREHENSIV, V2, P36

[5]

HU ZP, 2004, INNER MONGOLIA COAL, V2, P102

[6]

LI JZ, 1995, GUIZHOU CHEM IND, V2, P38

[7]

Ma F., 2003, SHANXI ARCHITECTURE, V29, P27

[8]

PU JL, 1994, CHINA RESOURCES COMP, V2, P15

[9]

ROBERTS M, 1994, WORLD WASTE, V37, P6

[10]

Sun L., 2002, CHINA COAL, V5, P10

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