Study On Geological Environment Of Coal Seam In Shaozhai Southern Mine Field Of Gansu

In order to develop the region’s economy, the government of Lingtai country attaches great importance to the exploitation of coal resources. After the approval of the Gansu provincial government, the project of coal resources mining in Shao Villages was carried out immediately. In order to provide a theoretical basis for this project, the research project started instantly. In this paper the south mine field in Shao Villages was chosen as the study area. In this paper, a number of technical methods, such as engineering, measuring, drilling, geophysical logging, pumping tests, indoor tests, etc., are used to analyze and study the geological environment conditions and engineering characteristics of coal seams and surrounding rocks. The research involves the following aspects:regional geology, coal seam characteristics and contrast, hydrogeological conditions, environmental and geological conditions, engineering properties of coal seam, and other engineering mining conditions. Through this research, engineering geological conditions of the coal seams and surrounding rock were identified, and the engineering mining conditions were constructively explored. In addition, environmental and geological problems in seam mining process were forecasted and analyed. The research results provide important geological information for development of coal resources in accordance with the principles of economic and reasonable.Identified as the study field in the coal bearing strata of Jurassic middle yan’an group, as a continental river marsh facies. Through the analysis of a large number of drilling data, the coal bearing strata in the area has carried on the detailed analysis and research, yanan group divided into paragraphs, and paragraphs analyzes the lithology, lithofacies, made a analysis to summarize the characteristics of coal seams, thickness of coal seam and its changing law, coal seam workability, stability analysis summary, mapped the relevant maps and tables. In8main minable seam coal layer is located in yan’an group of the first paragraph, coal seam thickness of1.30-16.10m, coal seam is relatively stable, the recoverable mining field. Coal layer2,5coal layer is located in yan’an group of the second paragraph, the coal layer thickness0.83～2.95m,2coal seam, the more stable of all field recoverable, coal layer thickness1.10～3.10m,5 coal seam, the more stable recoverable for63%of the whole area. The yan’an formation coal bearing coefficient was23.5%.This thesis of mine coal seam geological environment evaluation is as follows: hydrogeology type is predominantly fissure aquifer hydrogeological conditions simple deposit; Engineering complex geological exploration degree for medium type.