Response Characteristics Of Minerals And Elements During Coal Deformation

Based on systematic analysis of structural features in Zhuxianzhuang coal mine, different deformation degree TDCs were collected. Through ICP-MS, SEM-EDX, XRF, XRD, CVAFS etc equipments survey and evaluate the type and content of elements and minerals from samples. Combined with the coal mine structure characteristic and stress strain environment in which TDCs formed, Discussion mineral and elements,migration and aggregation druing the coal,deformation.Recognitions were shown below:(1) Zhu Xianzhuang mine tectonic deformation response significantly to regional tectonic evolution characteristics. The main structure of mine is a syncline, steep eastern and slow western. Fracture structure development in mine, There are mainly NNW, NNE and near EW to 3 groups,NNW trending faults mainly are Thrust fault and developed in the eastern part of the mine,NNE trending faults mainly are Normal faults and developed in the wastern part of the mine,EW trending faults mainly are Normal faults and Cut the NNW, NNE trending faults.(2) Analysis of macroscopic and microscopic deformation features of TDCs sample, Zhu Xianzhuang coal mine samples are divided into 7 types: fragmentation coal, sheet coal, porphyroclastic coal, crushed coal, scale coal, scrunchcoal and mylonite coal. Analysis of the evolution of TDCs in different period and different tectonic stress- strain environment.(3) Distribution of primary minerals and epigenetic minerals in different types of TDCswas investigated; there is significant increase in primary minerals which mainly consist of clay minerals in ductile deformation stage because of the mixed rheological effect and metamorphism in coal body.Fissures and holes formed in brittle deformation stage provide space for formation and occurrence of epigenetic mineral, coal fissures were filled with a large number of minerals. With the increase of deformation degree, original intact and regularcoal mineral particles turn irregular gradually.(4) Distribution characteristic and variation law of major elements, trace elements and rare earth elements in different deformation degree TDCs were comprehensively analyzed; relationship between elements and minerals in coal was probed. We found mineral is the main carrier of inorganic elements in coal migration and enrichment of elements has relationship with coal deformation degree.(5)It is revealed that stress- strain environment where TDCs form is the main driving force of element migration. Combined with the deformation and metamorphism environment, migration aggregation of minerals during coal deformation process can be attributed into 3 modes: fissure filling, stress-driven and mixed flow.