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| 1 | 金属矿山充填采矿技术应用研究进展显示文摘地下金属矿山固废充填开采技术是实现矿业低碳绿色开发的重要途径,矿山充填不仅可以实现最大限度的回采矿产资源,而且可以实现矿业固废的环保处置。系统回顾了金属矿山充填采矿方法的发展历程,从金属矿山高效率规模化充填采矿、连续充填开采和如何降低充填采矿成本3个方面介绍了最新的技术应用研究进展。首先系统梳理了金属矿山充填工艺的演变发展脉络,总结了涵盖矿山固废充填料浆制备、充填料浆管道输送、充填采场封闭和采场尾砂料浆脱水等全流程充填工艺技术的应用进展和发展趋势。然后研究分析了尾砂充填体非均质特性和尾砂料浆固结力学特性的演化发展机制,并对比分析了传统的采场充填体强度需求解析方法与改进的胶结充填体强度需求计算-设计方法,进而介绍了井下采场充填体质量原位监测与分析评价方法。基于上述研究进展综述,得出矿山充填采矿方法变革是实现高效率、规模化、低成本充填采矿的核心要素,矿山全流程充填工艺创新是稳定制备与使用高质量充填料浆的必要举措,深入研究采场充填体力学作用机理问题是确保充填采矿技术安全、绿色、经济、便捷应用的本质要求。最后阐明了充填采矿领域未来应重点关注的研究方向,指出加快发展绿色低碳充填新技术、新材料与新装备是助推金属矿山充填转型发展的动力引擎。 | 郭利杰 刘光生 马青海 陈鑫政 | 2022 | 煤炭学报2022，47，12： | 25 |
| 2 | An improved method to assess the required strength of cemented backfill in underground stopes with an open face显示文摘Backfill is increasingly used in underground mines to reduce the surface impact from the wastes produced by the mining operations. But the main objectives of backfilling are to improve ground stability and reduce ore dilution. To this end, the backfill in a stope must possess a minimum strength to remain self-standing during mining of an adjacent stope. This required strength is often estimated using a solution proposed by Mitchell and co-workers, which was based on a limit equilibrium analysis of a wedge exposed by the open face. In this paper, three dimensional numerical simulations have been performed to assess the behavior of the wedge model. A new limit equilibrium solution is proposed, based on the backfill displacements obtained from the simulations. Comparisons are made between the proposed solution and experimental and numerical modeling results. Compared with the previous solution, a better agreement is obtained between the new solution and experimental results for the required cohesion and factor of safety. For large scale(field) conditions, the results also show that the required strength obtained from the proposed solution corresponds quite well to the simulated backfill response. | Li Li Michel Aubertin | 2014 | International Journal of Mining Science and Technology2014，24，4： | 19 |
| 3 | Stability analyses of vertically exposed cemented backfill:A revisit to Mitchell's physical model tests显示文摘Mitchell's solution is commonly used to determine the required strength of vertically exposed cemented backfill in mines. Developed for drained backfill, Mitchell model assumed a zero friction angle for the backfill. Physical model tests were performed. Good agreements were obtained between the required strengths predicted by the analytical solution and experimental results. However, it is well-known that zero friction angle can only be possible in terms of total stresses when geomaterials are submitted to unconsolidated and undrained conditions. A revisit to Mitchell's physical model tests reveals that both the laboratory tests performed for obtaining the shear strength parameters of the cemented backfill and the box stability tests were conducted under a condition close to undrained condition. This explains well the good agreement between Mitchell's solution and experimental results. Good agreements are equally obtained between Mitchell's experimental results and FLAC3 D numerical modeling of shortterm stability analyses of exposed cemented backfill. | Liu Guangsheng Li Li Yang Xiaocong Guo Lijie | 2016 | International Journal of Mining Science and Technology2016，26，6： | 11 |
| 4 | Numerical simulations of water flow and contaminants transport near mining wastes disposed in a fractured rock mass显示文摘A numerical tool, called Hydro-Geosphere, was used to simulate unsaturated water flow and contaminants migration around an open pit filled with mining wastes. Numerical simulations had been carried out to assess the influence of various factors on water flow and solute transport in and around the surface openings including recharge, properties of the waste material and presence of fractures in the surrounding rock mass. The effect of the regional hydraulic gradient was also investigated. The analyses were conducted by simulating various 2D cases using experimentally obtained material properties and controlled boundary conditions. The effects of the hydrogeological properties of the filling material(i.e., water retention curve and hydraulic conductivity function), fracture network characteristics and conductivity of the joints were assessed. The results illustrate that fractures control water flow and contaminants transport around the waste disposal area. A fracture network can desaturate the system and improve the regional gradient effect. | Ben Abdelghani Farouk Aubertin Michel Simon Richard Therrien René | 2015 | International Journal of Mining Science and Technology2015，25，1： | 9 |
| 5 | 充填体损伤本构模型的建立及其强度的确定方法显示文摘中关铁矿拟采用阶段空场嗣后充填采矿法进行回采,该采矿方法的关键之一就是合理地确定充填体强度。传统的充填体强度确定方法存在诸多问题,需要探索更科学的方法来研究充填体强度与岩体的匹配。在对中关铁矿尾砂胶结充填体进行室内力学试验、得到其应力-应变曲线的基础上,利用损伤力学建立了充填体峰值应力前的损伤本构方程,并根据岩体开挖释放能量与充填体峰值变形能相近原则,确定了中关铁矿的最佳充填体强度为1.86 MPa,灰砂比为1∶6,对现场下一步的充填采矿生产具有重要的指导意义。 | 邱景平 杨蕾 邢军 孙晓刚 王强 | 2016 | 金属矿山2016，45，5： | 8 |
| 6 | Investigation of the short-term stress distribution in stopes and drifts backfilled with cemented paste backfill显示文摘Cemented paste backfill(CPB) is largely used in underground mines worldwide.A key issue associated with application of CPB is to estimate the stresses in backfilled stopes and on barricades.Recent numerical and experimental results show that arching effect is absent shortly after the placement of CPB in stopes.However,stress decreases in barricade drift with increasing distance between the measurement points and drawpoint have also been observed,demonstrating arching effect shortly after the pouring of CPB.To explain these paradoxes,CPB is considered as Bingham fluid having a yield shear stress.Three dimensional analytical solutions are proposed to evaluate the short-term total stresses in backfilled stopes and on barricades,accounting for the CPB's yield shear stress-induced arching effect.Stress diminution due to such arching effect in the backfilled stopes and on barricades is indeed obtained.But the reduction becomes insignificant using typical yield shear stress and stope geometry.More analyses indicate that the typical yield shear stress values do not fully correspond to field conditions where the yield shear stress would increase exponentially due to apparent consolidation(loss of water by drainage,a phenomenon similar to the desiccation of overly saturated fine-grained materials). | Pengyu Yang Li Li | 2015 | International Journal of Mining Science and Technology2015，25，5： | 6 |
| 7 | A numerical evaluation of continuous backfilling in cemented paste backfilled stope through an application of wick drains显示文摘Cemented paste backfill(CPB) is gaining popularity in many underground mines worldwide. Sufficient water is added into CPB to make a flowable material for pipe transportation. Barricades are built near the drawpoints to prevent in-rush of the fill slurry. To avoid barricade failures resulting from excessive backfill pressures, backfilling is typically performed with a plug pour followed by a final pour. The interval between the two pours should be shortened or removed to increase mining productivity and avoid pipe clogging. Recently, Li proposed to apply wick drains in backfilled stopes to promote drainage and consolidation. The preliminary simulations by considering an instantaneous filling indicated that the drainage of CPB can be significantly accelerated by using wick drains. Barricade was not considered.Here, some new numerical modellings are presented with more representative filling sequences, stope geometry, and different draining configurations. The results illustrate that the stope can be backfilled continuously by using wick drains. | Li Li Yang Pengyu | 2015 | International Journal of Mining Science and Technology2015，25，6： | 2 |
| 8 | 基于断层影响下的充填体强度需求优化研究显示文摘为分析断层影响下的充填体强度需求问题,以某矿的断层赋存特点为工程背景,采用力学推导的方法,重点对临近断层处两步采进行了力学分析,提出了充填体强度需求解析公式。同时,采用FLAC3D对断层处的充填体与矿体稳固性进行数值模拟研究,得到了充填体强度需求模拟解。对比分析了2种计算结果,确定了合理的充填体强度需求,保证了断层处矿体安全高效开采。本研究可为同类矿山充填体强度需求优化计算提供参考。 | 李广波 盛宇航 吴再海 宋泽普 | 2023 | 有色金属科学与工程2023，14，5： | 0 |
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