吕梁山区表层黄土似膏体充填适应性试验研究

金属矿山 ›› 2019, Vol. 48 ›› Issue (09): 59-64.

吕梁山区表层黄土似膏体充填适应性试验研究

黄丹^1,2，杨超^1,2，史采星^1,2，郭利杰^1,2

1. 北京矿冶科技集团有限公司，北京 100160；2. 国家金属矿绿色开采国际联合研究中心，北京 102628

出版日期:2019-09-15 发布日期:2019-10-10
基金资助:
基金项目：国家“十二五”重点研发计划项目（编号：2016YFC0600709），国家“十二五”科技支撑计划项目（编号：2015BAB12B01）。

Experimental Study on the Adaptability of Paste-like Filling by Surface Loess in Lvliang Mountain Area

Huang Dan^1,2，Yang Chao^1,2， Shi Caixing^1,2， Guo Lijie^1,2

1. BGRIMM Technology Group，Beijing 100160，China；2. National Center for International Joint Research on Green Metal Mining，Beijing 102628，China

Online:2019-09-15 Published:2019-10-10

摘要/Abstract

摘要： 吕梁山区铝土矿资源大多适合于地下开采，随着内陆地区铝土矿价格持续走高，其矿石价值已具备应用充填法开采的条件，地下铝土矿充填开采是铝土矿开采技术发展的新课题。当前对铝土矿采用拜耳法生产氧化铝时产出的赤泥废料不具备进行规模充填的技术条件。地下铝土矿山井巷工程大部分为脉内布置，废石量不足，地下铝土矿山充填开采面临着充填骨料匮乏的难题。通过充填骨料探索性试验，因地制宜选择黄土作为吕梁山区地下铝土矿山的充填骨料，开展了黄土胶结充填物化参数、粒级分析、浆体流动性、泌水率和强度配比等试验。研究表明：①黄土充填料浆能够以似膏体的形式泵送进入采场；②工业性试验表明，黄土作为充填骨料在灰砂比为1∶6、料浆浓度≥68%、泌水率≤3%的条件下，具备似膏体特性，28 d充填体强度≥0.8 MPa，满足某地下铝土矿回采对充填体强度及矿山充填能力的要求，有助于解决该矿山在充填开采过程中面临的充填骨料不足和顶底板遇水泥化问题，可为控制铝土矿开采地压及提高回采率提供重要技术支撑。

关键词: 地下开采, 地下铝土矿山, 充填开采, 黄土, 似膏体充填

Abstract: Most of the bauxite resources in Lvliang mountain area are suitable for underground mining.As the price of bauxite continue to rise，bauxite had the condition of mining with filling.Filling mining is a new topic of mining technology in underground bauxite mine.The red mud waste that is produced during the production of alumina by Bayer process，is not available for large-scale filling in current technical conditions.Because underground bauxite mining engineerings are mostly arranged within the ore-body，the amount of waste-rock is insufficient.Filling mining in underground bauxite mines is faced with the problem of lack of filling aggregate.The exploratory test of filling aggregate is carried out.Loess is selected as the filling aggregate of an underground bauxite mine in Lvliang mountain area.The physical and chemical parameters，grain size analysis，slurry fluidity，bleeding rate and filling strength ratio of cemented loess are tested. The study results show that:①the loess slurry could be pumped into the stopes with past-like form；②industrial test results show that loess can be used as filling aggregate，when the cement-sand ratio is 1∶6，the filling slurry concentration not less than 68% and the bleeding rate is not more than 3%，the loess filled slurry is similar to the properties of paste and 28 d backfill strength not less than 0.8 MPa.The above study results further indicated that the loess filling meets the requirements of backfill strength and filling capacity of the underground bauxite，which is help for solving the problems of lack of filling aggregate and argillation of the watered roof and floor in stopes，besides that，it can also provide important technical support for controlling the ground pressure of bauxite mining and improving the recovery rate.

Key words: Underground mining, Underground bauxite mine, Filling mining, Loess, Similar paste filling

黄丹, 杨超, 史采星, 郭利杰. 吕梁山区表层黄土似膏体充填适应性试验研究[J]. 金属矿山, 2019, 48(09): 59-64.

HUANG Dan, YANG Chao, SHI Cai-Xing, GUO Li-Jie. Experimental Study on the Adaptability of Paste-like Filling by Surface Loess in Lvliang Mountain Area[J]. Metal Mine, 2019, 48(09): 59-64.

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