the study area is situated in the middle part of the tabas block. it contains outcrops of rocks that formed along longitudinal faults in early cimmerian orogenic phase. the basin subsided along these faults from the late triassic to early cretaceous, which include two sedimentary cycles. a sedimentary cycle, related to upper triassic to bajocian is known as shemshak group. another sedimentary c...

in the present study, an investigation was carried out on parvadeh coal mine in tabas, iran, to survey the effect of fractures on unusual methane gas emission in coal mines. this coal mine was chosen for investigating because of its high methane gas content in the coal body and available data from sensors in desired locations. gas concentration monitoring programs were carried out at the mine s...

Hydraulic fracturing (HF) is one of the methods for making coal mining operation safer and more economical. The most important parameters affecting HF process a seam are dip, thickness, uniformity, roof floor conditions, reserve strength. This paper presents development application fuzzy model predicting efficiency HF, considering aforementioned factors. In developed model, seams calculated as ...

background: the aim of this study was to detect the seroprevalence of human fascioliasis in isfahan county, central iran in 2013. methods: overall, 471 sera samples were collected from people recalled randomly to 20 health centers in the city of isfahan and 10 related villages in 2014. sera were examined using elisa test. a questionnaire was filled out for each participant. results: altogether ...

the nayband formation was measured and sampled in parvadeh area, southern tabas city. in this area, this formation has a thickness of 1410 m, dividing into four members, namely gelkan, bidestan, howz-e-sheikh and howz-e-khan. a total 573 samples were treated for palynological analysis, and only 120 samples were productive. a total of 57 miospore taxa and 11 plant macrofossil were encountered. b...

Geological studies are very important at different steps of mining activities. Different uncertain geological criteria and factors show a significant impact during the underground operations mineral extraction process. The current study reports on evaluation classification coal seams for methane drainage-ability (MDA) through fuzzy hybrid approach. This problem was investigated due to importanc...

The Nayband Formation was measured and sampled in Parvadeh area, southern Tabas city. In this area, this formation has a thickness of 1410 m, dividing into four members, namely Gelkan, Bidestan, Howz-e-sheikh and Howz-e-khan. A total 573 samples were treated for Palynological analysis, and only 120 samples were productive. A total of 57 miospore taxa and 11 plant macrofossil were encountered. B...