نتایج جستجو برای: coal field
تعداد نتایج: 816845 فیلتر نتایج به سال:
Coal mining is one of the most important causes of environmental pollution, as large quantities of coal dust particles are emitted. Colombia-South America has large natural coal reserves and "El Cerrejón" is the world's largest open-cast mine located in the northern department of Guajira. The aim of the present study was to evaluate genotoxic effects in a population exposed to coal residues fro...
It is presented an optical fiber sensing system projected to operate in the demanding conditions associated with coal waste piles in combustion. Distributed temperature measurement and spot gas sensing are requirements for such a system. A field prototype has been installed and is continuously gathering data, which will input a geological model of the coal waste piles in combustion aiming to un...
Several empirical equations to estimate coal pillar strength have been presented in academic studies. The development processes of these equations are similar and are usually obtained by fitting the mathematical function (curve) to field data. One of the best criteria to evaluate the quality of fitting for such equations is the correlation coefficient R2, which has limited applicability. It is ...
A bomb calorimeter is an apparatus used for measuring the performance of coal in term of heat of combustion. Recent awareness has been created regarding uncertainty of measurement, due to mainly two reasons. Laboratory accreditation, which has steadily been on the rise, which requires a estimation of uncertainty of measurement particularly in the field of calibration. Second, increased maturity...
Experimental and field work on silicosis, while concentrating attention on the danger of exposure to the dust from hard rock, has produced a sense of false security in regard to the coal miner. Mavrogordato (1918) stated: " It may be regarded as established that all forms of dust enter the lungs and that some, such as coal, are relatively harmless, while others, such as flint, are deadly ". Bro...
Moinuddin Ghauri 1,*, Khurram Shahzad 2,*, Abrar Inayat 3, Zulfiqar Ali 4, Waqar Ali Khan 5, Javaid Akhtar 2 and Keith R. Cliffe 6 1 Department of Chemical Engineering, COMSATS Institute of Information Technology, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan 2 Centre for Coal Technology, University of the Punjab, Lahore 54000, Pakistan; [email protected] 3 Department of Sustainable...
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