【摘要】 通过对西山、汾西、霍州等矿区 9个煤矿 2 1个煤层的调查统计 ,将回采巷道顶板按岩层结构分为多层薄层顶板、复合顶板、厚层整体顶板和厚煤层顶板 4种类型 ,并对典型围岩结构进行了相似材料模拟试验。更多还原

【Abstract】 Based on the survey and statistics results of 21 seams of 9 mines in Xishan, Fenxi and Huozhou, the roof of mining roadways was classified into multi thin layer roof, compound roof, thick and integral roof, and thick coal seam roof. Some similar model tests had been done for these typical structure of surrounding rocks.更多还原