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·860· 北京科技大学学报 第36卷 表5 Bingham模型拟合2尾矿流变系数 底流中固相的最大质量分数为73.71%,膏体定义 Table 5 Rheological coefficients of Tailing 2 fitted according to the 预测的理论膏体浓度最大值为73.89%,二者相差 Bingham model 0.18%.2尾矿现场深锥浓密机底流中固相的最大 料浆中固相 复相关系数, To/Pa 凸n/(Pas) 质量分数为68%,膏体定义预测膏体浓度最大值为 质量分数/% R2 68.97%,二者相差0.97%.综上所述,完善后的膏 59 2.1592 0.3242 0.8735 体定义界定膏体浓度可信度较高. 61 11.3571 0.3137 0.9142 63 31.0392 0.2535 0.9687 部 考文献 65 58.1989 0.3108 0.9385 [Grabinsky M W.In situ monitoring for ground truthing paste back- fill designs /Proceedings of the 13th International Seminar on 67 98.5256 0.4900 0.9536 Paste and Thickened Tailings.Canada,2010:85 69 139.1900 0.4900 0.9784 2] Fall M,Nasir O.Predicting the temperature and strength develop- 70 213.5568 0.8089 0.9517 ment within cemented paste backfill structures /Proceedings of 71 242.4299 0.9684 0.9880 the 13th International Seminar on Paste and Thickened Tailings Canada,2010:125 B] Belem T,Fourie A B,Fahey M.Time-dependent failure criterion for cemented paste backfills/Proceedings of the 13th Internation- al Seminar on Paste and Thickened Tailings.Canada,2010:147 60 4]Nasir 0,Fall M.Coupling binder hydration temperature and com- pressive strength development of underground cemented paste backfill at early ages.Tunnelling Underground Space Technol, 2010,25(1):9 [5]Fall M,Celestin J,Han F S.Potential use of densified polymer- pastefill mixture as waste containment barrier materials.Waste Manage,2010,30(12):2570 [6]Jewell R J,Fourie A B,Lord E R.Paste and Thickened Tailings a Guide.Australian Centre for Geomechanics (ACG),2002 58 60 62 646668 70 固相质量分数烧 LiuTY,Zhou C P,Jin M L,et al.The Application and Technolo- 图102乌山尾矿料浆浓度对屈服应力增量的影响 gy of Backfilling Mining.Beijing:Metallurgical Industry Press, Fig.10 Effect of Tailing 2 slurry concentration on the yield stress in- 2001 cremen (刘同有,周成浦,金铭良,等.充填采矿技术与应用.北京: 治金工业出版社,2001) ax°,当膏体达到一定浓度时,屈服应力随固相质量 ] Wang HJ,Wang Y,Wu A X,et al.Research of paste new defi- 分数变化呈指数增长.提出屈服应力增量概念,固 nition from the viewpoint of saturation ratio and bleeding rate.J 相质量分数C+时屈服应力增量定义为C:,时屈服 Wuhan Unig Technol,2011,33(8):85 应力减去C:时屈服应力,屈服应力增量反映了屈服 (王洪江,王勇,吴爱祥,等.从饱和率和泌水率角度探讨膏 体新定义.武汉理工大学学报,2011,33(6):85) 应力的变化幅度. ] Zhai Y G,Wu A X,Wang H J,et al.Threshold mass fraction of (2)从屈服应力角度对膏体定义进行了完善: unclassified-ailings paste for backfill mining.J Unir Sci Technol 浆体屈服应力在(200±25)Pa时的料浆中固相质量 Beijing,2011,33(7):795 分数值作为膏体临界浓度,反推浆体饱和率为 (翟永刚,吴爱祥,王洪江,等.全尾砂膏体充填临界质量分 101.5%~105.3%时的固相质量分数范围,该范围 数.北京科技大学学报,2011,33(7):795) [10]Wang Y,Wu A X,Wang H J,et al.A method to determine 即为适合工业应用的膏体浓度. deep cone thickener volume and its application.China Unie (3)采用不同矿山的两种尾矿分别从室内实验 Min Technol,2013,42 (1)45 (1尾矿)和工程应用(2"尾矿)角度对完善后的膏 (王勇,吴爱祥,王洪江,等.深锥浓密机体积确定方法及其 体定义进行验证.1"尾矿室内动态压密实验获得的 应用.中国矿业大学学报,2013,42(1):45)北 京 科 技 大 学 学 报 第 36 卷 表 5 Bingham 模型拟合 2# 尾矿流变系数 Table 5 Rheological coefficients of Tailing 2 fitted according to the Bingham model 料浆中固相 质量分数/% τ0 /Pa μp /( Pa·s) 复相关系数, R2 59 2. 1592 0. 3242 0. 8735 61 11. 3571 0. 3137 0. 9142 63 31. 0392 0. 2535 0. 9687 65 58. 1989 0. 3108 0. 9385 67 98. 5256 0. 4900 0. 9536 69 139. 1900 0. 4900 0. 9784 70 213. 5568 0. 8089 0. 9517 71 242. 4299 0. 9684 0. 9880 图 10 2# 乌山尾矿料浆浓度对屈服应力增量的影响 Fig. 10 Effect of Tailing 2 slurry concentration on the yield stress in￾crement axb ,当膏体达到一定浓度时,屈服应力随固相质量 分数变化呈指数增长. 提出屈服应力增量概念,固 相质量分数 Ci + 1时屈服应力增量定义为 Ci + 1时屈服 应力减去 Ci 时屈服应力,屈服应力增量反映了屈服 应力的变化幅度. ( 2) 从屈服应力角度对膏体定义进行了完善: 浆体屈服应力在( 200 ± 25) Pa 时的料浆中固相质量 分数值作为膏体临界浓度,反推浆体饱和率为 101. 5% ~ 105. 3% 时的固相质量分数范围,该范围 即为适合工业应用的膏体浓度. ( 3) 采用不同矿山的两种尾矿分别从室内实验 ( 1# 尾矿) 和工程应用( 2# 尾矿) 角度对完善后的膏 体定义进行验证. 1# 尾矿室内动态压密实验获得的 底流中固相的最大质量分数为 73. 71% ,膏体定义 预测的理论膏体浓度最大值为 73. 89% ,二者相差 0. 18% . 2# 尾矿现场深锥浓密机底流中固相的最大 质量分数为 68% ,膏体定义预测膏体浓度最大值为 68. 97% ,二者相差 0. 97% . 综上所述,完善后的膏 体定义界定膏体浓度可信度较高. 参 考 文 献 [1] Grabinsky M W. In situ monitoring for ground truthing paste back￾fill designs / / Proceedings of the 13th International Seminar on Paste and Thickened Tailings. Canada,2010: 85 [2] Fall M,Nasir O. Predicting the temperature and strength develop￾ment within cemented paste backfill structures / / Proceedings of the 13th International Seminar on Paste and Thickened Tailings. Canada,2010: 125 [3] Belem T,Fourie A B,Fahey M. Time-dependent failure criterion for cemented paste backfills / / Proceedings of the 13th Internation￾al Seminar on Paste and Thickened Tailings. Canada,2010: 147 [4] Nasir O,Fall M. Coupling binder hydration temperature and com￾pressive strength development of underground cemented paste backfill at early ages. Tunnelling Underground Space Technol, 2010,25( 1) : 9 [5] Fall M,Célestin J,Han F S. Potential use of densified polymer￾pastefill mixture as waste containment barrier materials. Waste Manage,2010,30( 12) : 2570 [6] Jewell R J,Fourie A B,Lord E R. Paste and Thickened Tailings: a Guide. Australian Centre for Geomechanics ( ACG) ,2002 [7] Liu T Y,Zhou C P,Jin M L,et al. The Application and Technolo￾gy of Backfilling Mining. Beijing: Metallurgical Industry Press, 2001 ( 刘同有,周成浦,金铭良,等. 充填采矿技术与应用. 北京: 冶金工业出版社,2001) [8] Wang H J,Wang Y,Wu A X,et al. Research of paste new defi￾nition from the viewpoint of saturation ratio and bleeding rate. J Wuhan Univ Technol,2011,33( 8) : 85 ( 王洪江,王勇,吴爱祥,等. 从饱和率和泌水率角度探讨膏 体新定义. 武汉理工大学学报,2011,33( 6) : 85) [9] Zhai Y G,Wu A X,Wang H J,et al. Threshold mass fraction of unclassified-tailings paste for backfill mining. J Univ Sci Technol Beijing,2011,33( 7) : 795 ( 翟永刚,吴爱祥,王洪江,等. 全尾砂膏体充填临界质量分 数. 北京科技大学学报,2011,33( 7) : 795) [10] Wang Y,Wu A X,Wang H J,et al. A method to determine deep cone thickener volume and its application. J China Univ Min Technol,2013,42 ( 1) : 45 ( 王勇,吴爱祥,王洪江,等. 深锥浓密机体积确定方法及其 应用. 中国矿业大学学报,2013,42 ( 1) : 45) · 068 ·
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