自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第46卷    第10期    总第254期    2015年10月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2015)10-3758-09
基于化学注浆预加固的破碎矿体采场结构优化数值模拟
韩斌1,于少峰1,吴爱祥1,高永祥2,程海勇1

(1. 北京科技大学 土木与环境工程学院,北京,100083;
2. 云南金沙矿业股份有限公司 汤丹公司,云南 昆明,650000
)

摘 要: 汤丹铜矿4号矿体厚大软弱破碎,围岩松散、炮孔成孔率低;优选MP 364矿用树脂进行化学注浆预加固,并在3采2分段进行现场化学注浆试验,确定化学浆液扩散方式、注浆压力及扩散半径等参数,建成注浆工艺系统。通过FLAC 3D及ANSYS等软件建模,并对地表岩移、顶板位移、采场支撑体系塑性区以及矿柱最大主应力进行数值模拟分析。研究结果表明:按照推荐注浆材料配比及工艺施工,岩体强度及完整性得到较大提高,炮孔成孔率提高22%;化学注浆后,由于岩体强度及矿体完整性得到提高,拟通过增大矿房暴露面积以提高矿石回收率。注浆后,在保证安全且保持矿柱尺寸不变的情况下,矿房暴露面积提高约50 m2,则矿石回收率可以提高约10%以上,提高了矿山经济效益。

 

关键字: 化学注浆预加固;注浆工艺系统;数值模拟

Numerical simulation of stope structure parameters based on chemical grouting technology in broken deposit
HAN Bin1, YU Shaofeng1, WU Aixiang1, GAO Yongxiang2, CHENG Haiyong1

1. School of Civil and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, China;
2. Tangdan Company, Yunnan Jinsha Mining Co., Ltd, Kunming 650000, China

Abstract:No.4 orebody of Tangdan copper mine is thick, soft and broken, and its surrounding rock is loose while the blasthole rate is low. Mine resin MP 364 was selected to conduct chemical grouting pre-reinforcement, and field test was conducted in subsection 2, stope 3. Dispersal mode and parameters like grouting pressure and diffusion radius of the chemical slurry were determined. Finally, grouting process system was established. Softwares like FLAC 3D and ANSYS were chosen to make a model. The surface rock movement, roof displacement, stope support system of the plastic zone and pillar maximum principal stress were analyzed. The result shows that when constructing as the recommended material ratio and technology, the strength and integrity of the rock mass are improved greatly, and blasthole rate inereases by 22%. After grouting, method like increasing room exposed area was thought to improve ore recovery. Under the condition of keeping safe and pillar size invariant, room exposed area increases by 50 m2, and ore recovery increases by 10% after grouting, which improves economic benefit of the mine.

 

Key words: chemical grouting pre-reinforcement; grouting process system; numerical simulation

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号