JSW

In this paper, the actual state of the computer science and the role it has to play in managing manufacturing processes in mines were presented. The reasons for and the rationale behind the low advancement of the implementation of the information solutions were discussed. The Business Intelligence (Bl) issues were discussed in greater detail, the growing interest in Bl systems was discussed and the examples of the BI systems implementation were presented.

The individual chapters of the book are devoted to: the functioning of mining enterprises in the conditions of an epidemic threat, the characteristics of the SARS-CoV-2 virus, the impact of environmental factors on the persistence of the SARS-CoV-2 virus, the ways of transmission of the SARS-CoV-2 virus and the possible routes of infection with it, work of mining crews in terms of safety rules in force during a pandemic, characteristics of aerological conditions in quarry, research on the spread of aerosols in underground mine workings, model tests of the spread of aerosols in underground workings using CFD methods, modeling the spread of specific doses of aerosols in typical mining workings , analysis of the impact of the methods of ventilation of workings on the spread of aerosols, assessment of employee exposure to SARS-CoV-2 virus infection in underground mine workings, assessment of occupational risk related to the risk of SARS-CoV-2 in Polish coal mines stone. Chapters 14-22 describe the activities undertaken by various mining companies to counteract the spread of the virus.

Poszczególne rozdziały książki zostały poświęcone: funkcjonowaniu przedsiębiorstw górniczych w warunkach zagrożenia epidemicznego, charakterystyce wirusa SARS-CoV-2, wpływowi czynników środowiskowych na trwałość wirusa SARS-CoV-2, sposobom przenoszenia się wirusa SARS-CoV-2 i możliwym drogom zakażenia się nim, pracy załóg górniczych w aspekcie zasad bezpieczeństwa obowiązujących w czasie pandemii, charakterystyce warunków aerologicznych w kwk, badaniom rozprzestrzeniania się aerozoli w podziemnych wyrobiskach górniczych, badaniom modelowym rozprzestrzeniania się aerozoli w wyrobiskach podziemnych z wykorzystaniem metod CFD, modelowaniu rozprzestrzeniania się określonych dawek aerozoli w typowych wyrobiskach górniczych, analizie wpływu sposobów przewietrzania wyrobisk na rozprzestrzenianie się aerozoli, ocenie narażenia pracownika na zakażenie wirusem SARS-CoV-2 w podziemnych wyrobiskach górniczych, ocenie ryzyka zawodowego związanego z zagrożeniem SARS-CoV-2 w polskich kopalniach węgla kamiennego. W rozdziałach 14-22 przedstawiono działania podejmowane w różnych spółkach górniczych związane z przeciwdziałaniem rozprzestrzenianiu się wirusa.

In recent years, self-compacting concrete (SCC) has
gained wide use for placement in congested reinforced concrete
structures with difficult casting conditions. For such applications,
the fresh concrete must possess high fluidity and good
cohesiveness. In this present study, the effect of replacing the
cement, fine aggregate and coarse aggregate by constant
replacement of silica fume, Manufactured sand (JSW)
replacement of 0%, 10%, 20%, 30%, 40% and light weight
aggregate replacement of 10%, 15%, for internal curing
respectively and their combinations of various proportions on the
properties of different mixes of M40 grade has been  compared
with normal self compacting concrete by conventional curing
method. In this study fresh property and hardened properties of
the different mixes of concrete were determined. From the
present study the test result showed that for fresh concrete all the
mixes satisfies the EFNORC standard values. For harden
concrete both compressive strength and split tensile strength test
the M9 (30%relpacement FA and15% LWA) M4 (30%
replacement FA and10% LWA) by internally curried concrete at
ambient room temperature mixes gave highest values than the
normal concrete by conventionally curing method.

In this paper, the actual state of the computer science and the role it has to play in managing manufacturing processes in mines were presented. The reasons for and the rationale behind the low advancement of the implementation of the information solutions were discussed. The Business Intelligence (Bl) issues were discussed in greater detail, the growing interest in Bl systems was discussed and the examples of the BI systems implementation were presented.