Feasibility Analysis and Evaluation of Mining under Pressure in 2#Coal Seam of Shuiyu Coal Industry Co.,Ltd.
With the increase of mining depth,water inrush from the coal seam floor has become one of the important geological hazards affecting mine safety production.Taking the pressurized mining of 2#coal seam of Shuiyu Coal Industry Co.,Ltd.as the engineering background,this paper analyzed the underground flow field of Ordovician limestone water,water-rich and water-blocking capacity of the water-barrier layer,and calculated the water inrush risk of 2#coal seam by using the water inrush coefficient method,and obtained the water inrush coefficient of the Ordovician limestone water on the floor as 0.010 2-0.040 3 MPa/m.The water inrush coefficient values were all less than 0.06 MPa/m,and the risk zone of water inrush was determined to be Ⅰ zone,which belonged to the relative safe zone of pressurized mining.To avoid the occurrence of mine water damage,pressurized mining technology measures were formulated to ensure the safety production of Shuiyu Coal Industry Co.,Ltd.
floor of coal seammining under pressurefeasibility analysiswater inrush coefficient methodOrdovician limestone water level
NETL
NSTL
万方数据
