摘要
针对当前充填开采技术中水泥基胶结料存在的高排放和高耗能问题,将微生物诱导CaCO_(3)沉积(MICP)技术引入充填开采领域,研究了微生物胶结充填材料的力学性能,建立了基于MICP的微生物胶结充填开采技术体系。研究表明,拌和型和灌注型微生物胶结充填材料的强度随着营养液浓度和菌液用量的增加呈现先增大后减小的规律,平均强度分别为0.88 MPa和17.95 MPa;微生物充填材料内部的有效CaCO_(3)晶体是充填材料固结的关键,在拌和型试样中以方解石和球霰石的矿物形式存在,在灌注型试样中主要为方解石。微生物胶结充填开采技术的节能减排环境效益显著,特别是在当前环保需求和政策背景下,该技术具有科学价值和发展前景。
The microbial induced carbonate precipitation(MICP)technology is proposed in the field of backfill mining to tackle high emission and high energy consumption in the current backfill system.Specifically,mechanical properties of microbial cemented backfill materials are investigated,and a proposal of microbial cemented backfill mining technology is presented in this paper.Results show that the strength of mixed and grouted microbial cemented backfill first increases and then decreases with the increase of cementation solution concentration and bacterial solution dosage.The average strength is 0.88 MPa and 17.95 MPa respectively.The effective CaCO_(3) crystal in the microbial backfill material is the key to its consolidation.The CaCO_(3) crystal of the mixing sample exists in the form of calcite and vaterite,and mainly calcite in the grouted sample.Microbial cemented backfill mining technology has significant environmental benefits such as energy conservation and emission reduction.There is happy prospect for this technology under current environmental needs and policies.
作者
邓雪杰
刘浩
张吉雄
赵逸乐
李玉
卞立国
田秀国
谢晋
Deng Xuejie;Liu Hao;Zhang Jixiong;Zhao Yile;Li Yu;Bian Liguo;Tian Xiuguo;Xie Jin(School of Energy and Mining Engineering,China University of Mining and Technology-Beijing,Beijing 100083;Kailuan(Group)Co.Ltd.,Tangshan Hebei 063018;School of Mining Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116)
出处
《矿业科学学报》
CSCD
2023年第4期439-451,共13页
Journal of Mining Science and Technology
基金
国家自然科学基金(52274149,51804308)
中国博士后科学基金(2020T130269)
中国矿业大学(北京)“越崎青年学者”资助计划(2020QN03)。
关键词
微生物诱导碳酸钙沉积
微生物充填材料
充填开采
绿色开采
microbial induced carbonate precipitation
microbial backfilling material
backfill mining
green mining
