关键词: 大采高, 矿压显现规律, 回归分析, 支架适应性, 合理支护阻力

Abstract:

By theoretically analyzing and contrasting with field measurement data, the strata behaviors of the 3101 fully-mechanized working face with large mining height in Chahasu coal mining was deeply studied.The stress and working conditions of shield powered supports with large mining height was discussed, and the adaptability of the supports is analyzed. The field observation results shows that the first weighting was 36.7m,dynamic load factor was 1.47; periodic weighting was 15.03m and its dynamic load factor was 1.44. Besides, There was a obvious time difference between mid-area and either sides of working face.The statistics showed the distribution frequency of supports’ working resistance was basically in normal, and has proved the linear increasing resistance relationship between setting load and the supports resistance towards a mining cycle end.And the supports used at present (ZY12000/28/63) can meet the demands of working face pressurization behavior. The study results could provide the references to supports choice and the safety and high efficient mining of coal mining face under the similar conditions．

Key words: large mining height, strata behavior regularity, regression analysis, support adaptability, supports&rsquo, optimum working resistance