Mining Science最新文献_第8页

Hydraulic fracturing technology in rock burst hazard controlling 水力压裂技术在岩爆危害控制中的应用

IF 1.3

Mining Science Pub Date : 2015-01-01 DOI: 10.5277/MS150202

W. Karkocha

{"title":"Hydraulic fracturing technology in rock burst hazard controlling","authors":"W. Karkocha","doi":"10.5277/MS150202","DOIUrl":"https://doi.org/10.5277/MS150202","url":null,"abstract":"All methods of rock burst hazard evaluation and control are classified as rock burst prevention. The prevention methods can be divided in two general categories – the passive (non-active) and active ones. Active methods of rock burst prevention focus generally on reducing of stress level in the area of its concentration through controlled tremors and rock bursts by blasting works. Among the active methods the hydraulic fracturing can be noted. Traditional hydraulic fracturing techniques generally form main hydraulic cracks. However, when we combine hydraulic fracturing with blasting we might obtain much better results. For example, the hydraulic crack range becomes wider than by using only conventional methods. In coal seams it is possible to increase permeability which makes gas drainage to be more effective. It is because water shockwaves and bubble pulsations induced by the explosion, cause a high strain rate in the rock mass surrounding the bore hole. When hydraulic fracturing is used, a micro seismic event takes place. This is why micro seismic technologies are used to monitor the range of hydraulic fracturing process. This article is only mentioning the issue which in the Author opinion, deserves more attention.","PeriodicalId":43629,"journal":{"name":"Mining Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79430625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Modeling and simulation analysis of mine production in 3D environment 矿山生产三维环境建模与仿真分析

IF 1.3

Mining Science Pub Date : 2015-01-01 DOI: 10.5277/MSC152215

S. Checiński, Andrzej Witt

引用次数: 6

Forms of heavy metals (Zn, Pb, Cd) occuring in rhizospheres from the areas of former and contemporary Zn-Pb ore mining 以前和现代铅锌矿开采地区根际重金属(Zn, Pb, Cd)赋存形态

IF 1.3

Mining Science Pub Date : 2015-01-01 DOI: 10.5277/MS150210

D. Rożek, W. Nadłonek, J. Cabała

引用次数: 8

The meaning of geostatistical research in the light of the concept of assessing values of lignite deposits 从褐煤矿床价值评价的概念谈地统计学研究的意义

IF 1.3

Mining Science Pub Date : 2015-01-01 DOI: 10.5277/MS150208

K. Pactwa, J. Woźniak

引用次数: 1

The evolution of mechanized excavating systems in LGOM mines conditions LGOM矿山条件下机械化开采系统的演化

IF 1.3

Mining Science Pub Date : 2015-01-01 DOI: 10.5277/MS150220

J. Młynarczyk, P. Mertuszka, L. Ziętkowski, M. Bodlak

引用次数: 1

Properties of fly ash from agro-forestry biomass combustion in the aspect of their use in mining technology 农林生物质燃烧粉煤灰在采矿技术应用方面的特性

IF 1.3

Mining Science Pub Date : 2015-01-01 DOI: 10.5277/MS150221

A. Pawluk, Piotr Kasprzyk, Dušan Terpák

{"title":"Properties of fly ash from agro-forestry biomass combustion in the aspect of their use in mining technology","authors":"A. Pawluk, Piotr Kasprzyk, Dušan Terpák","doi":"10.5277/MS150221","DOIUrl":"https://doi.org/10.5277/MS150221","url":null,"abstract":": Production of electricity / heat through the use of biomass is one of the possible ways to increase energy production from renewable energy sources and promote sustainable development by reduc-ing direct greenhouse gas emissions chich is associated with the energy sector (Moraisi et al., 2011). In the coming years, biomass will have important role as a natural source of renewable energy, due to the rising cost of fossil fuels, highly questionable safety of nuclear energy and the need of carbon dioxide emissions reduction. (Callejón-Ferre et al., 2014). According to 2009/28/EC Directive about the promotion of use of energy from renewable sources, Biomass is defined as the biodegradable fraction of products, waste and residues from the agricultural industry (including also substances coming from plant and animals), forestry and related industries, as well as the biodegradable fraction of industrial and municipal waste. Increasingly frequent use of alternative fuels, including biomass, in different areas of the industry cause a large production of new waste materials. Economic and environmental considerations are the cause of increased interest in the use of the economic potential of ash generated in these processes. In the article possibility of using new waste materials, which are fly ash from the combustion of mixed agricultural and forest biomass as hydraulic backfill material, solidifying and gobs caulking was analyzed. chemical composition by emissional spectroscopy with inductively","PeriodicalId":43629,"journal":{"name":"Mining Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73474322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Removal of iron from sandstone by magnetic separation and leaching: case of El-Aouana deposit (Algeria) 磁选浸出法去除砂岩中的铁——以阿尔及利亚El-Aouana矿床为例

IF 1.3

Mining Science Pub Date : 2015-01-01 DOI: 10.5277/MSC152203

Soufiane Bouabdallah, M. Bounouala, Abdeslam Chaib, Badji Mokhtar-Annaba

{"title":"Removal of iron from sandstone by magnetic separation and leaching: case of El-Aouana deposit (Algeria)","authors":"Soufiane Bouabdallah, M. Bounouala, Abdeslam Chaib, Badji Mokhtar-Annaba","doi":"10.5277/MSC152203","DOIUrl":"https://doi.org/10.5277/MSC152203","url":null,"abstract":": To improve the quality of raw materials from North East Algeria and their application in the field of flat glass manufacturing, the sandstone of El-Aouana (Jijel) was subjected to a physicochemical characterization. Analysis techniques such as X-ray diffraction, atomic absorption spectrophotometry and a chemical analysis of size fractions by sieving were used. According to this characterization it is noticed that sandstone feedstock contains primarily quartz (SiO 2 ), as well as ferriferous minerals considered as impurities during glass manufacturing. This work concerns the removal of iron oxide from silica sandstone to obtain a material acceptable for flat glass manufacturing. For this, we have studied the silica enrichment process using a magnetic separation. Moreover, a leaching process by using hydrochloric acid has been studied under various experimental conditions; the parameters studied were: hydrochloric concentration, temperature, and time of contact. The results obtained show that the leaching studied presents a better removal of iron oxide after 150 min of treatment at temperature 90°C with a 3 mol/L, a concentrate obtained final of 99.16% SiO 2 with a content of 0.01% Fe 2 O 3 .","PeriodicalId":43629,"journal":{"name":"Mining Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87403289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Numerical analysis for an optimization of a powered roof support operating in hazard conditions of minig tremors 矿震危险工况下动力顶板支护优化数值分析

IF 1.3

Mining Science Pub Date : 2015-01-01 DOI: 10.5277/MS150216

D. Szurgacz

引用次数: 4

GIS-based spatial assessment of rock minerals mining - a case study of the Lower Silesia Region (SW Poland) 基于gis的岩石矿物开采空间评价——以波兰西南部下西里西亚地区为例

IF 1.3

Mining Science Pub Date : 2015-01-01 DOI: 10.5277/MSC152201

J. Blachowski

{"title":"GIS-based spatial assessment of rock minerals mining - a case study of the Lower Silesia Region (SW Poland)","authors":"J. Blachowski","doi":"10.5277/MSC152201","DOIUrl":"https://doi.org/10.5277/MSC152201","url":null,"abstract":"Mining of rock minerals, constitutes a strong stimulus for economic development and at the same time, can significantly and negatively affect the state of natural environment, roads and well-being of local communities. This paper presents methodology for studies of spatial impact of rock minerals mining in the Lower Silesia region (SW Poland). In the region majority of magmatic, metamorphic and other rock minerals occur in Poland and their intensive mining is an important sector of regional economy. The concept of mining density (mineral production per unit area) has been introduced and the changes of rock minerals mining in the period of the last 8 years (2006-2013) have been analysed and presented graphically with GIS-based methodology. Mining density increased from 2006 to 2011 and decreased from 2011 to 2013. Change in the spatial pattern of mining density between 2006 and 2013, despite comparable volume of rock minerals production, has been identified. In addition proximity of mines to human settlements, nature protection areas and railways (potential transport routes) has been analysed. Comprehensive and coherent information on rock minerals mining for the area of Lower Silesia provided in this study has been used in developing and implementing regional spatial development policy and attaining the balance between the economic needs, nature protection requirements and the well-being of its citizens.","PeriodicalId":43629,"journal":{"name":"Mining Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75885839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Horizontal integration in the development strategy of mining companies 矿业公司发展战略的横向整合

IF 1.3

Mining Science Pub Date : 2015-01-01 DOI: 10.5277/MSC152209

J. Kudełko, H. Wirth, C. Bachowski, J. Gacek

{"title":"Horizontal integration in the development strategy of mining companies","authors":"J. Kudełko, H. Wirth, C. Bachowski, J. Gacek","doi":"10.5277/MSC152209","DOIUrl":"https://doi.org/10.5277/MSC152209","url":null,"abstract":"Integration strategy is one option in the development of mining companies and is implemented through a connection of either processes or economic entities which operate or may operate separately. Usually this strategy is carried out by companies that occupy a very strong competitive position. Considering its direction, it may be horizontal or vertical. Horizontal integration strategy stems from a desire to increase market share by an entrepreneur or create a new company based on common know-how and combined operational processes. It can be realized in an external dimension through a merger or takeover, as well as in the internal dimension based on its own resources. The external dimension is based on capital or contractual integration of a company with external economic entities performing related or conglomerate activity. The targets of such integration have a resource, a market effectiveness, or a competence nature. In the case of mining companies, it covers all important activity areas, including geology, mining, processing, environmental protection, and waste management, and is carried out with due diligence. In the internal dimension, the strategy of horizontal integration consists in consolidating the strategic targets of all business units around the company’s (corporation’s) targets. The authors focused on two trends most relevant to pursuing a horizontal integration strategy, including increasing the company’s flexibility and undertaking joint activities. Flexibility consists in the potential ability of the company to adapt quickly to changed environment conditions. Joint activity includes cooperation of its respective units in terms of products, markets, and functions; its implementation should be preceded by a detailed analysis of the company’s competences.","PeriodicalId":43629,"journal":{"name":"Mining Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84328803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7