محمدامین زارعی درمیان

Prediction of gas emissions is a calculation based on empirical processing in the coal mining. In this study, methane diffusion was investigated coal exploration on parameters such as coal gas content, mining, depth, etc., in two faces in the Tabas Parvadeh central coal mining. Therefore, in the beginning, the initial and final values for the studied faces were modeled based on the neural network. The neural network was calculated methane for P8/TG face, between 0.4476%-0.9921% and P8/MG face are between 0.1636%-0.3379%. The intensity of methane gas emission from the studied mine was done based on the level of coal and the amount of gas volume using MATLAB coding. Also, the type of extraction method in the mine was done on the amount of gas emission caused by mining. According to the amount and aggregate of induced fractures, the permeability shows several degrees of increase. These amounts can evacuation the gas caused by the underground extraction of the mine faster. In this study, the amount of gas emissions due to mining was calculated using coding to the content of the remaining gas matrix In this study, the amount of gas emission due to drilling was 0.04%, blasting was 0.045%, support was 0.040%, muckout was 0.06% and jiggring was 0.25%. Small errors in the measurement of gas content can lead to large errors in the estimated calculations, which were determined using the software. The correlation coefficient of input and output of the studied data was estimated as 0.984%. The modeling done for the 2 face current shows a good result which can be used to improve mine safety.

The Kuhkamar shale with a thickness of 354 m is composed of siliciclastic rocks (sandstone and shale). Petrography studies of the sandstones in this area show two petrofacies including arkose and sub-arkose. These sandstones composed of sub rounded to moderately sorted; therefore, compositionaly to texturaly, they are immature to submature with mono and polycrystalline quartz and k-feldespar. In terms of petrography, the shales are rich in quartz, albite, calcite and, to a lesser degree, clay minerals (illite and chlorite). Moreover, SEM images represent clay minerals of illite and chlorite in these shales. In order to interpret provenance, the shales of the studied section have been geochemically analyzed. These shales are rich in quartz, albite, and calcite with small amounts of clay minerals (illite and chlorite). With respect to (UCC), these shales show depletion in SiO2، Al2O3، Na2O, P2O5, Ba, Cu, Nb and Sr and enrichment in U and CaO. Plotting Al2O3 versus TiO2 as well as ternary diagrams, (SiO2/20), (K2O+Na2O), (MgO+TiO2+FeO) and Al2O3, (CaO + Na2O + K2O), (FeO + MgO), suggest that the original source of these shale was from intermediate igneous rocks. Calculated PIA and CIA indicate low to medium chemical weathering and arid to semi-arid climatic conditions in the source area. Prepared discrimation diagram using the major oxides (SiO2 versus K2O/Na2O) and ternary diagram (Na2O+ K2O), (TiO2+ MgO+ Fe2O3), (SiO2/20), shows that most of these shales were plotted in active continental margin. Paleogeographic reconstruction in this area, during the Eocene, shows that sedimentation in this area is mainly taken place in the intracontinental subsiding basin.