【摘要】 梅山铁矿二期破碎硐室处在蚀变严重的闪长玢岩中，岩体有较大的膨胀性。结合硐室开挖步骤，应用了预应力锚索进行初始支护、局部加固支护和最终的加强支护。通过现场监测和数值计算，判断支护后的硐室处在稳定状态。更多还原

【Abstract】 The second phase engineering of crusher room in Meishan Iron Mine is situated in serious alteration diorite-porphyrite with larger expansive feature. In the room excavating,the prestressedanchor cable is used as initial support,partly reinforced support and finally reinforced support. Based onthe in-situ monitoring and numerical value calculating,it is enough to prove the room of support beingstable.更多还原