Cemented Paste Backfill Design under States of Low Confining Stress
低围压状态下的胶结膏回填设计
基本信息
- 批准号:RGPIN-2016-05619
- 负责人:
- 金额:$ 1.97万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2016
- 资助国家:加拿大
- 起止时间:2016-01-01 至 2017-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Modern underground mining methods rely on backfill to safely continue excavation under high rock stress conditions. Cemented Paste Backfill (CPB) is an engineered material that reuses “waste” products (mine tailings) and creates a thick consistency backfill that can be delivered at high rates to the underground voids, tightly filling all void spaces and curing with uniform material properties that can be tailored to specific mine design requirements.
Two critical design scenarios involve assessing the CPB strength required when an adjacent void is excavated (sidewall stability), or when the CPB is undercut (sill mat stability). Design methods for both of these scenarios were developed in the 1980’s and served the industry well in situations where backfill design was not critical. Increasingly, however, these methods are thought to be overly conservative and more detailed engineering approaches are sought. A major impediment to rational engineering design is the form of constitutive model used to simulate backfill behaviour, especially under these exposed-face scenarios where the confining stresses can be very low and even in the tensile range. The research program described in this proposal aims to address this problem and develop basic understanding as well as practical design tools that allow a better assessment of CPB strength requirements for sidewall stability or sill mat stability.
New CPB laboratory techniques will be developed to allow testing under tensile states of “confinement”. Non-destructive wave techniques will be used to characterize progressive damage as the CPB is tested. A constitutive model incorporated elastic as well as brittle and ductile plastic mechanisms will be developed and implemented in a numerical code. Canadian industrial partners will be consulted to develop a database of sidewall and sill mat case histories for back-analysis purposes. The sophisticated modeling approaches used for research purposes will be critical to developing basic understanding of CPB behaviour under sidewall and sill mat exposure conditions, but these will not be practical for routine design; hence, additional work will be undertaken to develop simplified analysis and design approaches based on the more rigorous back-analyses, and they will be tested against ongoing design work with the partner mines.
A total of 3 PhD and 3 MASc projects will be supported by the research. They will interact with the larger soil and rock mechanics group at UofT, as well as with industry partners in consulting and in mining operations. In this way the students will also become part of the technology transfer mechanism so that the fruits of the research can be brought to bear for the benefit of Canada.
现代地下采矿方法依靠充填体在高地应力条件下安全继续开挖。胶结式膏体回填材料(CPB)是一种工程材料,可重复利用“废弃”产品(矿山尾矿),并创建可高速输送到地下空隙的厚稠度回填材料,紧密填充所有空隙,并以统一的材料特性固化,可根据特定的矿山设计要求进行定制。
有两个关键的设计方案涉及评估在开挖相邻空隙时所需的CPB强度(井壁稳定性),或当CPB被底切时(基床垫稳定性)。这两种方案的设计方法都是在20世纪80年代的S时期开发出来的,并在回填设计不是关键的情况下很好地服务于行业。然而,这些方法越来越多地被认为过于保守,人们寻求更详细的工程方法。合理的工程设计的一个主要障碍是用来模拟充填行为的本构模型的形式,特别是在这些暴露的地表情况下,其中的围压可以非常低,甚至在拉伸范围内。本建议中描述的研究计划旨在解决这一问题,并开发基本的理解和实用的设计工具,以便更好地评估CPB对侧壁稳定性或门槛垫稳定性的强度要求。
将开发新的CPB实验室技术,以允许在拉伸状态下进行“限制”测试。在对CPB进行测试时,将使用非破坏性波技术来表征渐进损伤。将开发一种包含弹性、脆性和延性塑性机制的本构模型,并在数值代码中实施。将征求加拿大工业伙伴的意见,以开发一个井壁和窗垫案例历史数据库,用于反分析目的。用于研究目的的复杂建模方法对于发展对侧壁和窗垫暴露条件下CPB行为的基本了解至关重要,但这些方法对于常规设计是不切实际的;因此,将开展额外的工作,在更严格的反分析的基础上制定简化的分析和设计方法,并将对照伙伴地雷正在进行的设计工作对这些方法进行测试。
这项研究将资助3个博士项目和3个MASC项目。他们将与UofT更大的土壤和岩石力学小组互动,以及与咨询和采矿作业的行业合作伙伴互动。这样,学生也将成为技术转移机制的一部分,从而使研究成果能够惠及加拿大。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Grabinsky, Murray其他文献
Cemented Paste Backfill 1-D Consolidation Results Interpreted in the Context of Ground Reaction Curves
- DOI:
10.1007/s00603-020-02173-5 - 发表时间:
2020-06-15 - 期刊:
- 影响因子:6.2
- 作者:
Jafari, Mohammadamin;Shahsavari, Mohammad;Grabinsky, Murray - 通讯作者:
Grabinsky, Murray
Experimental Study of the Behavior of Cemented Paste Backfill under High Isotropic Compression
- DOI:
10.1061/(asce)gt.1943-5606.0002383 - 发表时间:
2020-11-01 - 期刊:
- 影响因子:3.9
- 作者:
Jafari, Mohammadamin;Shahsavari, Mohammad;Grabinsky, Murray - 通讯作者:
Grabinsky, Murray
Drained Triaxial Compressive Shear Response of Cemented Paste Backfill (CPB)
- DOI:
10.1007/s00603-021-02464-5 - 发表时间:
2021-04-18 - 期刊:
- 影响因子:6.2
- 作者:
Jafari, Mohammadamin;Shahsavari, Mohammad;Grabinsky, Murray - 通讯作者:
Grabinsky, Murray
Grabinsky, Murray的其他文献
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{{ truncateString('Grabinsky, Murray', 18)}}的其他基金
Cemented Paste Backfill Design under States of Low Confining Stress
低围压状态下的胶结膏回填设计
- 批准号:
RGPIN-2016-05619 - 财政年份:2021
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Cemented Paste Backfill Design under States of Low Confining Stress
低围压状态下的胶结膏回填设计
- 批准号:
RGPIN-2016-05619 - 财政年份:2020
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Cemented Paste Backfill Design under States of Low Confining Stress
低围压状态下的胶结膏回填设计
- 批准号:
RGPIN-2016-05619 - 财政年份:2019
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Cemented Paste Backfill Design under States of Low Confining Stress
低围压状态下的胶结膏回填设计
- 批准号:
RGPIN-2016-05619 - 财政年份:2018
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Geomechanical design of cemented paste backfill systems (phase III)
胶结膏回填系统地质力学设计(第三期)
- 批准号:
514220-2017 - 财政年份:2017
- 资助金额:
$ 1.97万 - 项目类别:
Collaborative Research and Development Grants
Cemented Paste Backfill Design under States of Low Confining Stress
低围压状态下的胶结膏回填设计
- 批准号:
RGPIN-2016-05619 - 财政年份:2017
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Uncemented paste backfill for underground mining
地下采矿用非胶结糊状回填土
- 批准号:
138459-2011 - 财政年份:2015
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Uncemented paste backfill for underground mining
地下采矿用非胶结糊状回填土
- 批准号:
138459-2011 - 财政年份:2014
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Uncemented paste backfill for underground mining
地下采矿用非胶结糊状回填土
- 批准号:
138459-2011 - 财政年份:2013
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Uncemented paste backfill for underground mining
地下采矿用非胶结糊状回填土
- 批准号:
138459-2011 - 财政年份:2012
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
相似海外基金
Multiscale/Multiphysics Testing and Modelling of Cemented Paste Backfill-Rock Interface Behaviour and Application to the Design of Cemented Paste Backfill Structures
水泥浆回填-岩石界面行为的多尺度/多物理测试和建模及其在水泥浆回填结构设计中的应用
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RGPIN-2019-05078 - 财政年份:2022
- 资助金额:
$ 1.97万 - 项目类别:
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Cemented Paste Backfill Design under States of Low Confining Stress
低围压状态下的胶结膏回填设计
- 批准号:
RGPIN-2016-05619 - 财政年份:2021
- 资助金额:
$ 1.97万 - 项目类别:
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Multiscale/Multiphysics Testing and Modelling of Cemented Paste Backfill-Rock Interface Behaviour and Application to the Design of Cemented Paste Backfill Structures
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RGPIN-2019-05078 - 财政年份:2021
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Multiscale/Multiphysics Testing and Modelling of Cemented Paste Backfill-Rock Interface Behaviour and Application to the Design of Cemented Paste Backfill Structures
水泥浆回填-岩石界面行为的多尺度/多物理测试和建模及其在水泥浆回填结构设计中的应用
- 批准号:
RGPIN-2019-05078 - 财政年份:2020
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Cemented Paste Backfill Design under States of Low Confining Stress
低围压状态下的胶结膏回填设计
- 批准号:
RGPIN-2016-05619 - 财政年份:2020
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Cemented Paste Backfill Design under States of Low Confining Stress
低围压状态下的胶结膏回填设计
- 批准号:
RGPIN-2016-05619 - 财政年份:2019
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Multiscale/Multiphysics Testing and Modelling of Cemented Paste Backfill-Rock Interface Behaviour and Application to the Design of Cemented Paste Backfill Structures
水泥浆回填-岩石界面行为的多尺度/多物理测试和建模及其在水泥浆回填结构设计中的应用
- 批准号:
RGPIN-2019-05078 - 财政年份:2019
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Multiscale/Multiphysics Testing and Modelling of Cemented Paste Backfill-Rock Interface Behaviour and Application to the Design of Cemented Paste Backfill Structures
水泥浆回填-岩石界面行为的多尺度/多物理测试和建模及其在水泥浆回填结构设计中的应用
- 批准号:
DGECR-2019-00072 - 财政年份:2019
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$ 1.97万 - 项目类别:
Discovery Launch Supplement
Cemented Paste Backfill Design under States of Low Confining Stress
低围压状态下的胶结膏回填设计
- 批准号:
RGPIN-2016-05619 - 财政年份:2018
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Geomechanical design of cemented paste backfill systems (phase III)
胶结膏回填系统地质力学设计(第三期)
- 批准号:
514220-2017 - 财政年份:2017
- 资助金额:
$ 1.97万 - 项目类别:
Collaborative Research and Development Grants