Soft floor deformation characteristics and analysis of influential factors in Binchang mining area

Based on the analysis of roadway deformation characteristics of working face ZF1404 in Jiangjiahe coal mine, the paper summed up preliminarily the factors influencing roadway deformation in the mining area, the uneven distribution of stress field is the controlling factor, soft floor, uneven thickness, big depth and small dip are the internal factors, mine pressure, watering of roof and watered expansion of soft rock are the direct factors, mining influence is indirect factor. Serious deformation zone is located in the axis and two sides of Zhaopo syncline. Combined with the actual measures taken for roadway maintenance during production, treatment measures such as reasonable planning of mining layout and excavation replacement, leaving reasonable bottom coal, different support for different segments, timely pumping water in working face can effectively prevent the soft floor roadway from deformation, ensuring safe and normal production of working face, having certain referential significance.