Abstract：With the increases of coal mining depth and intensity，the in-situ stresses play more important roles in the displacement and damage of surrounding rock. It is very important to take in-situ stress measurements and analyze the distribution characteristics of the in-situ stress fields in coal mining area. 62 points of stress measurements(including plane and three-dimensional tests) have been conducted in 10 coal mines of Jincheng coal mining area by means of the hydraulic fracturing stress measurement rig with small borehole. The stress measurement data indicate that：the in-situ stress field in Jincheng coal mining area，in which the tectonic stress takes absolute predominance，is dominated by horizontal stress and belongs to typical tectonic stress field. The magnitudes of the stresses are moderate values. The orientations of the maximum horizontal principal stresses change greatly from eastern part to western part because of the effect of Jincheng—Huolu folded and faulted zone. Based on the field data，the stress distribution map on Jincheng coal mining area is drawn up. The stress variation law with buried depth is analyzed；and the relation between the ratio of the horizontal principal stresses to the vertical stresses and buried depth is discussed in contrast to Hoek-Brown envelope curve. The measured stress results have been applied to roadway layout and support design in typical mines；and the rational axis orientations of roadways have been determined according to the stress field distribution，which has been verified by underground application. The underground stress measurements provide reliable basic data for Jincheng coal mining area，and important consulting value for guiding mining engineering practices，such as mine field development，roadway layout，support design，and selection of mining methods，etc.. ；application
