Stability evaluation of coal seam roof and floor in burnt rock area of Hexingliang mine field
The spontaneous combustion of coal seams to form burnt rocks is a very common phenomenon.The study of coal seams in the burnt rock area can not only invert the geological history of coal seam evolution and paleoclimate and paleogeo-graphic environment,but also provide a basis for evaluating the stability of coal mine roof and floor and mine safety produc-tion.Based on the study of the engineering geological characteristics and structural characteristics of the coal seams in the burnt rock area of Hexingliang coal mine,the regional strata are divided into three major rock types and seven rock forma-tions,and the coal mine rock mass is divided into four major rock mass structure types:loose structure,cataclastic structure,layered structure and massive structure.The research on the structure and mechanical properties of the roof and floor of the coal seam shows that the coal seam has a good water storage space due to the tensile fracture and pore structure,the weak rock in the roof and floor of the minable coal seam is developed,and the engineering geological conditions of the burnt rock and oxidation zone are poor.It is recommended to strengthen the engineering maintenance of the shaft and roadway and the management of the coal seam roof in the construction and production of the coal mine in order to effectively prevent engi-neering accidents.
burnt rocksstructural characteristicsroof and floorstabilitymine safety
万方数据
维普
