·Yu et al [31] conducted dynamic impact tests on gray sandstone They found that grain size was correlated with the fragmentation of sandstone under a certain strain rate For sandstone buried deeply underground the dynamic behavior and fragmentation level closely correlate with the magnitudes of the pre stress and strain rate [21]
·In contrast under high dynamic impacts the sandstone tends to fail in a shear dominated manner resulting in smaller fragments with a more uniform size distribution
Medina Sandstone which was first quarried in Medina in 1837 by John Ryan has had a tremendous impact not only locally but worldwide Medina Sandstone is of excellent quality and durability It was quarried in four colors gray or white red pink and variegated Its color is rich and does not fade It does not absorb dampness
·Sandstone type deposits are the most common type of uranium deposits in the world A large variety of sub types have been defined based either on the morphology of the deposits tabular roll front etc or on the sedimentological setting paleovalley paleochannel unconformity or on tectonic or lithologic controls tectonolithologic mafic
·The pore throat systems and physical properties of tight sandstone reservoirs are complex and deposition is thought to be a fundamental control for them In this study the impacts of the full ranges of rock types from pebbly coarse sandstone to fine sandstone on the pore structures and physical properties of the Permian tight sandstone reservoir in the eastern
·Sec Economic Geology Volume 12 2024 The impacts of CO 2 on sandstone reservoirs in different fluid environments insights from mantle derived CO 2 gas reservoirs in Dongying Sag Bohai Bay Basin China Maoyun Wang 1 2 Jianhui Zeng 1 2 Chuanming Li 1 2 Juncheng Qiao 1 2 Wenfei Wei 1 2 Huanle Zhang 1 2 Huwang Cui 1 2
·Sedimentary rock Sandstones Clastic Rocks Stratification Sandstones are siliciclastic sedimentary rocks that consist mainly of sand size grains clast diameters from 2 to 116 millimetre either bonded together by interstitial chemical cement or lithified into a cohesive rock by the compaction of the sand size framework component together with any interstitial
·Wettability is an essential property of reservoirs that is of great importance for enhancing oil recovery EOR and oil migration The wettability of reservoirs is generally believed to be strongly affected by mineral compositions but it is not always the case An integrated study of petrography and wettability was carried out to determine the impact of chlorite minerals on
·Comparative case studies have stressed the variety of supply chain structures from informal artisanal mining supplying local communities to illegal industrial scale and integrated operations supplying regional markets as well as the diverse modus operandi and environmental and socio economic impacts of sand mining across jurisdictions
·variety of sandstone in terms of its colour and texture Due to a surge in exports during the last two decades there has been an increase in the number of sandstone quarrying and processing units in Jodhpur and nearby areas Currently sandstone quarrying and processing is one of most important sectors of Jodhpur s economy Bhadra et al 2007
·The Bunter Sandstone Formation UK southern North Sea has previously been identified as having the potential to store a very large amount of CO there are few producing fields in the formation information about the potential reservoir and seal are sparse but can be studied from legacy borehole records which were usually targeting deeper horizons
·Tight sandstone oil reservoirs generally refer to sandstone reservoirs with permeability less than mD and porosity less than 10% [1 2] and are characterized by poor physical properties a complex pore structure and strong heterogeneity [3 4] However tight oil reserves are abundant and in 2012 the amount of recoverable tight oil in China ranged from
·The impacts themselves cause further harm by driving food insecurity and poverty to perilous levels The longer the war goes on the deeper the economic crisis goes Much is still unfolding on the exact scale of the war s impacts But through the insights presented here we can start to build a quantitative picture of its economic hazards
Li et al [27] performed numerous unconfined compression tests on Berea sandstone and showed that mechanical properties vary with rock type measurement techniques and specimen geometry under
·Small mining towns are often single industry towns that turn to ghost towns or face negative socio economic impacts upon mine closure This study qualitatively explores the roles that mining companies and other key stakeholders should play in the development of local economies of the small mining communities to bring about economic sustainability employing
·It is hard to study weather induced impacts on consumption as supply chain effects cause a nonlinear economic response Here consumption risks due to weather induced production disruptions along
·The positive economic impacts of tourism are often not as significant as anticipated Furthermore tourism activity tends to bring with it unwanted and often unexpected negative economic impacts of tourism In this article I will discuss the importance of understanding the economic impacts of tourism and what the economic impacts of tourism
Highlights•The impacts of main factors on salt weathering were revealed •The thermodynamic crystallization behavior of salt mixture was presented by ECOS RUNSALT model •A quantitative method to evaluate the salt weathering damage potential for sandstone
1 School of Civil Engineering Hunan University of Science and Technology Xiangtan China; 2 School of Resources and Safety Engineering Central South University Changsha China; In order to analyze the dynamic fracture responses of surrounding rocks in underground space to cyclic impact loads a series of dynamic compressive tests were conducted using hollow
·economic impacts on the migrant household the sending country as well as the receiving country The paper is organized as follows Section 2 provides a discussion of the development implications first economic and then social impacts of migration for origin countries
·The mining of dimension stone is annually growing at a rate of 7% with a global turnover of around 60 billion USD per annum Ashmole and Motloung 2008a Sandstone which belongs to the family of dimension stone is a natural stone and has a great market for domestic constructions pavement landscaping tiling and walls and for making housewares
·The Mount Simon Sandstone Mt Simon a basal Cambrian sandstone underlying much of Midwestern US is a target for underground CO2 storage and waste injection which requires an assessment of