The underground workers in the Dutch coal-mines have been radiographed (70 mm.) seven times since 1949. The prevalence of coal-miners' pneumoconiosis shows a continuous decrease in all age groups. To evaluate the effect of the intensive system of dust suppression over this period a cohort analysis was made of the proportion ofmen with pneumoconiosis with the same number of years of exposure und...

This paper presents the study of control and management of technological processes in coal mines through means for displaying information. Information flow in the analysed closed systems consists of production process in an Underground Coal Mine (UCM), Computer System (CS), Display Units (DUs), Operators (Os) and Control Devices (CD). The mathematical model is applied for describing information...

The Appalachian region of USA hosts diverse forests and abundant high-quality coal reserves. Surface mining methods are often used for coal extraction. Because common reclamation methods in past years have not restored forest vegetation, surface mining has created a diverse land base. Although some mined lands have been placed into managed uses, most have not. Little is known about the extent a...

This study is part of the Coal Quality project, and involves washability characteristics of British Columbia coals. The first two parts of the project involved collection and analysis of washability data from assessment reports (Holuszko and Grievr:, 1990; Holusrko, 199 I ). The washability characteristics of coals from different regions, geological ftwmations and seams were studied wing classi...

Water disaster is one of the five natural disasters in coal mines, and it badly threats the lives safety of miners. As well known, the main reason of evoked flooding is water conducted fractured zone in the coal seam. Based on the Maxwell equation, we try to study the relationship between apparent resistivity and stratigraphic dip as well as strata direction. The numerical results show that the...

Shuai Zhang 1,*, Shijie Tang 2, Dongsheng Zhang 3,*, Gangwei Fan 1 and Zhen Wang 1 1 School of Mines, China University of Mining and Technology, Xuzhou 221116, China; [email protected] (G.F.); [email protected] (Z.W.) 2 Zhaogu No. 1 Coal Mine, Xin Xiang 453634, China; [email protected] 3 State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 22...