International Journal of Mining Reclamation and Environment最新文献_第9页

Comparing the accuracy of two approaches to account for internal dilution: A case study from a porphyry copper deposit 两种解释内部贫化方法的准确性比较——以斑岩铜矿为例

IF 2.4 3区工程技术

International Journal of Mining Reclamation and Environment Pub Date : 2023-03-20 DOI: 10.1080/17480930.2023.2192030

Rodrigo Alfaro, M. Maleki, N. Madani, Saeed Soltani-Mohammadi

引用次数: 0

Soil community catabolic profiles for a semiarid reclaimed surface coalmine 半干旱复垦地表煤矿土壤群落分解代谢特征

3区工程技术

International Journal of Mining Reclamation and Environment Pub Date : 2023-03-07 DOI: 10.1080/17480930.2023.2185438

Tahtamouni Mohammad Emad, Khresat Sa’eb, Lucero Mary, Sigala Jesus, Unc Adrian

引用次数: 1

Improving the top coal recovery ratio in longwall top coal caving mining using drawing balance analysis 应用牵引平衡分析提高长壁综放开采顶煤回收率

IF 2.4 3区工程技术

International Journal of Mining Reclamation and Environment Pub Date : 2023-03-01 DOI: 10.1080/17480930.2023.2184036

Liu Yang, Jiachen Wang, Shengli Yang, Lianghui Li, Shanxi Wu

{"title":"Improving the top coal recovery ratio in longwall top coal caving mining using drawing balance analysis","authors":"Liu Yang, Jiachen Wang, Shengli Yang, Lianghui Li, Shanxi Wu","doi":"10.1080/17480930.2023.2184036","DOIUrl":"https://doi.org/10.1080/17480930.2023.2184036","url":null,"abstract":"ABSTRACT The recovery ratio of longwall top coal caving (LTCC) technology is an important measure of its effectiveness. However, the recovery ratio of single-opening sequential caving technology in thick and extra-thick coal seams needs improvement. To address this, an independent cluster-group caving technology is proposed in this study. Four numerical simulation experiments were conducted to compare the recovery ratio and drawing balance of four-opening independent cluster-group caving technology and single-opening sequential caving technology. Results show that the recovery ratio in four-opening independent cluster-group caving technology is approximately 6% higher than in single-opening sequential caving technology when the thickness of the broken gangue layer and the coal seam are the same. Additionally, a judgment formula for the broken immediate roof thickness is provided when the top coal recovery ratio is seriously affected. The independent cluster-group caving technology demonstrates stronger stability and better adaptability under different conditions, as its caving sequence can prevent larger thickness changes and gangue disturbances during the drawing process. Overall, this study highlights the potential of independent cluster-group caving technology to improve the recovery ratio of LTCC technology in thick and extra-thick coal seams.","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48271955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Human-induced changes and phyto-geomorphological relationships in the historical ravaneti landscape of the Carrara marble basin (Tuscany, Italy) 意大利托斯卡纳卡拉拉大理石盆地历史拉瓦内蒂景观的人为变化和植物地貌关系

IF 2.4 3区工程技术

International Journal of Mining Reclamation and Environment Pub Date : 2023-02-23 DOI: 10.1080/17480930.2023.2181499

R. Gentili, Linda Alderighi, A. Errico, M. Salvatore, S. Citterio, F. Preti, C. Baroni

引用次数: 0

Mechanical and microstructural characteristics of cemented paste tailings modified with nano-calcium carbonate and cured under various thermal conditions 不同热处理条件下纳米碳酸钙改性水泥浆尾矿的力学和微观结构特征

IF 2.4 3区工程技术

International Journal of Mining Reclamation and Environment Pub Date : 2023-02-07 DOI: 10.1080/17480930.2023.2172661

Othmane Benkirane, S. Haruna, M. Fall

{"title":"Mechanical and microstructural characteristics of cemented paste tailings modified with nano-calcium carbonate and cured under various thermal conditions","authors":"Othmane Benkirane, S. Haruna, M. Fall","doi":"10.1080/17480930.2023.2172661","DOIUrl":"https://doi.org/10.1080/17480930.2023.2172661","url":null,"abstract":"ABSTRACT This paper focuses on the evaluation of the strength development and microstructure of nano-calcium carbonate (CaCO3) cemented paste backfill experimentally cured under isothermal conditions at room temperature and non-isothermal conditions in the field. A series of mechanical (uniaxial compressive strength, UCS) and microstructural (thermogravimetric, mercury intrusion porosimetry, scanning electron microscope) tests as well as monitoring experiments are experimentally conducted on cemented paste backfill (CPB) specimens with and without nano-calcium carbonate and cured at different times and under isothermal or non-isothermal conditions. The results show that the addition of nano-CaCO3 particles to CPB significantly improves its mechanical strength, irrespective of the thermal curing conditions (isothermal, field non-isothermal conditions). However, the impact of nano-CaCO3 particles on the increase in strength of CPB is only effective or significant at the early ages (curing time≤7 days). It is also found that the higher temperatures improve the accelerating effect of nano-CaCO3 much more than they accelerate the PCI hydration reactions in the first 3 days. Moreover, it is also found the sulphate ions present in the natural gold tailings negatively affect the mechanical performance of nano-CPB and reduced the accelerating effect of nano-CaCO3 due to sulphate attacks.","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48583880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Prediction of the pervious surround performance of blast damage zone to reduce groundwater flow in backfilled open-pits 充填露天矿爆破破坏区透水围护性能预测以减少地下水流

IF 2.4 3区工程技术

International Journal of Mining Reclamation and Environment Pub Date : 2023-01-31 DOI: 10.1080/17480930.2023.2170573

M. Rousseau, T. Pabst

{"title":"Prediction of the pervious surround performance of blast damage zone to reduce groundwater flow in backfilled open-pits","authors":"M. Rousseau, T. Pabst","doi":"10.1080/17480930.2023.2170573","DOIUrl":"https://doi.org/10.1080/17480930.2023.2170573","url":null,"abstract":"ABSTRACT Reducing groundwater flow in backfilled open-pit to limit interactions of the backfilled wastes with the environment often relies on the creation of preferential flow paths around the disposed wastes in the form of a pervious surround. The blast damage zone, which consists of an enhanced permeability zone near the pit walls, could naturally contribute to creating such preferential flow, thus eliminating the need to build a permeable envelope, reducing costs and maximising the volume for wastes deposition. The objective of this research was thus to propose parameters that could easily be accessed on the field, so practitioners could predict the flow deviation and evaluate if the BDZ is a sufficient containment structure to reduce interactions between backfilled wastes and the environment. Results showed the BDZ deviation could be predicted using the BDZ size and pit wall permeability only, and within a precision of 15% without prior assumptions on the wastes or rock permeability. Three abacuses and one semi-analytical equation were proposed, and several criteria were derived to ensure the BDZ would act as a natural pervious surround. The results of these study should help mining operators and regulatory agencies to assess the BDZ effect on groundwater flow in backfilled open-pits.","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41760548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Joint simulation of coal quality attributes using a new simulated annealing-based method of diagonalisation 基于模拟退火对角化的煤质属性联合模拟

IF 2.4 3区工程技术

International Journal of Mining Reclamation and Environment Pub Date : 2023-01-30 DOI: 10.1080/17480930.2023.2165312

B. Sohrabian, Saeed Soltani-Mohammadi, A. Tercan

引用次数: 0

A discrete element modelling of gravity flow in sublevel caving considering the shape and size distribution of particles 考虑颗粒形状和大小分布的分段崩落重力流离散元模型

IF 2.4 3区工程技术

International Journal of Mining Reclamation and Environment Pub Date : 2023-01-23 DOI: 10.1080/17480930.2023.2168870

Mahdeyeh Firouzabadi, K. Esmaeili, Gholamreza Saeedi Rashkolia, Mohsen Asadi

{"title":"A discrete element modelling of gravity flow in sublevel caving considering the shape and size distribution of particles","authors":"Mahdeyeh Firouzabadi, K. Esmaeili, Gholamreza Saeedi Rashkolia, Mohsen Asadi","doi":"10.1080/17480930.2023.2168870","DOIUrl":"https://doi.org/10.1080/17480930.2023.2168870","url":null,"abstract":"ABSTRACT One of the most significant challenges for cave mining methods is dilution, a process which is generally controlled by the gravity flow of caved materials. In this study, the discrete element method (DEM) was used to investigate the effects of changing the porosity of blasted ring material and caved waste rocks and of changing the ring inclination on material flow in a sublevel cave (SLC) mine. Yade software was used to simulate two-dimensional gravity flow in a longitudinal section of the sublevel while taking into consideration the shape and size distribution of the flowing rock particles. Four simulations were generated with different porosities, and the material flow in the models was compared to each other. The results demonstrate that when ring porosity is increased, dilution decreases, and the height of the extraction zone grows longitudinally. Also, a lower porosity of the blasted ore material in the ring can cause early dilution entry and expansion of the extraction zone towards the caved waste.. Finally, the effect of ring inclination on the material flow and dilution was investigated. The results of these simulations show an increased dilution as the ring inclination increases and a change in the shape of the extraction zone.","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45426629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Physical properties of mine drainage sediment according to depth in settling ponds 根据沉淀池深度确定的矿井排水沉积物的物理特性

IF 2.4 3区工程技术

International Journal of Mining Reclamation and Environment Pub Date : 2023-01-10 DOI: 10.1080/17480930.2023.2166248

Dong-kil Lee, Joonhak Lee, Y. Cheong, Jongmyung Park

引用次数: 0

Experimental study of mudrush mechanisms under different moisture contents in block caving 不同含水率下块体冒落泥机理的试验研究

IF 2.4 3区工程技术

International Journal of Mining Reclamation and Environment Pub Date : 2023-01-09 DOI: 10.1080/17480930.2023.2166761

R. Castro, F. Betancourt, R. Gómez, O. Salas, J. Zarabia

引用次数: 2