منابع مشابه
Preventing eye injuries in quarries
Eye injuries often occur in the workplace in low and middle-income countries, particularly in the construction, agricultural, mining, and manufacturing industries. Even if there are safety regulations in these industries, their enforcement is often unsatisfactory, and owners are not required to provide safety equipment. In 2005, Christian Medical College in Vellore, India, conducted a pilot stu...
متن کاملA Short-term Production Planning Model for Dimension Stone Quarries
In this paper, problem of short-term production planning for dimension stone quarries was mathematically modeled using a binary integer programming. The model includes an objective function, which was founded as the minimization of the costs due to the total cutting planes of the blocks. This objective may cause to maximization of the net present value (NPV) in dimension stone quarries. During ...
متن کاملApplication of geostatistical techniques to exploitation planning in slate quarries
When planning workings of slate extraction by mechanical means, it is important to know the quality of the rock mass to optimize the results of the cuttings in the extraction bank, because techniques to be used depend on relative percent of first quality or second quality slate. In this paper, a methodology for quality evaluation applied to slate extraction is developed in three phases, as a to...
متن کاملAntimicrobial Attributes of Rare Actinobacteria Detected from Limestone Quarries
Rare actinobacterial isolates belonging to the genera Micromonospora, Nonomuraea, Kribbella, Lechevalieria, Saccharotherix and commonly occurring Streptomyces were isolated from Limestone quarry a unique and geographical area and harsh habitat. pH – 9.0, temperature – 45 C and sodium chloride concentration – 3% were found to be optimum for the maximum growth and physiological ability of the tes...
متن کاملInfluences of limestone stone quarries on groundwater quality
Rapid population growth and increasing demand for the modern settlement has led to the increase of environmental pollution. Limestone quarry is one among the activities that affect environment and ecosystem in Pemba Island-Zanzibar. Quarrying activities brought an inevitable destruction to the environments ranging from excavation, soil and land degradation, loose of biodiversity and water pollu...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1893
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(01)94891-3