نتایج جستجو برای: mining faces

تعداد نتایج: 127201  

2013
Aradhana Sharma

Coal mining with perspective of health is a crucial area in India. The health condition of mine workers including women and children is one of the most serious impacts of mining. Workers not only suffers from external environmental situation of mines also they faces reduction in quality of life due to denial of access of food availability livelihoods. India, in this aspect poses a much more dan...

Journal: :journal of mining and environment 2010
a. ramezanzadeh m. hood

the first step in mining activities is rock excavation in both mine development and production. constant pressure for cost reduction and creating an improved/safe work environment for personnel has naturally resulted in increased use of mechanical excavation systems in many mining operations. also, mechanical excavation and mining is more compatible with automation, meaning possibility of reduc...

Journal: :Energies 2022

Surrounding rock control and support stability in the process of coal seam mining ultra-large height face are key to normal mine operation. In this study, roof movement deformation an analyzed, working resistance is obtained by introducing equivalent immediate roof. By analyzing wall spalling, multiple positions spalling required force obtained. At same time, supports more prone instability pro...

Journal: :Bolivian studies 2022

This essay proposes reading En las tierras del Potosí (1911), by Jaime Mendoza, as a diagnosis of the "national disease". In this novel, author explores multiple obstacles that Bolivian nation faces on its way to modernity. On one hand, portraying worker’s health issues in Llallagua tin mines, novel denounces exploitation mining company. However, impact company's actions is much deeper: it prod...

Journal: :pollution 2015
ikbal hussain jakir hussain mohammed arif vinod vadiya

rajasthan is one of the main mineral potential state of india. during the last 30 years it has witnessed enormous expansion of mining industries, but mining of most of the minor minerals coupled with changing climate has posed serious problems to the environmental fabric in the state, apart from base metal beneficiation plants. groundwater is also being polluted day-by-day by effluents generate...

Journal: :Energies 2023

Gob-side entry retaining by roof cutting, a pillarless mining technique, plays critical role in maintaining continuous production, rapid connection, and enhancing the coal recovery rate fully mechanized top caving working faces. This technique stands as sustainable development method mining. The present research, set against backdrop of Yitang Coal Mine 100602 gob-side investigates influence ro...

Journal: :International journal of the Society of Materials Engineering for Resources 2022

Epochs of human civilization are marked by the sources materials used at periods, namely: Stone Age, Bronze Iron Age and Silicon Age. The these eras were mined can be linked to development mining for benefit society. same epochs indications advances in Materials Science Engineering. We now Smart or Intelligent age. One key drivers era is sustainable development. To achieve development, G8 count...

Journal: :Journal of Geoscience and Environment Protection 2022

All coal fields in North China are affected by floor confined water to varying degrees, failure and inrush risk have always been a major problem baffle mining activities. Roof cutting pressure relief the lack of protective pillar can cause change stress field, leading depth, field is key determine depth failure. In order deeply study distribution characteristics gob-side entry retaining with ro...

Journal: :Cognitive neuropsychology 2008
Alexander Todorov Bradley Duchaine

We show that developmental prosopagnosics with severe impairments in both memory for faces and perception of facial identity can make normal trustworthiness judgements of novel faces. We tested four prosopagnosics on three different face sets. The first set consisted of faces that varied on multiple dimensions and that have been used to demonstrate impairments in trustworthiness judgements of p...

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