The total length of some tunnelsin clay rock has been over 3300 meters in Maluping and Yongshaping mining areas of Kailin Mineral Company. At present, some problems in different degree begin to appear in most completed tunnels, they are: the boron roof crack, two sides expansion masking the ditch, bottom concave or convex and so on. What's the more serious is that the tunnels with problems are the main traffic lanes, its unsafty will threat workers and equipments safty. The main reason for the appearance of the problems is the mismatching between the support partern of the tunnel and the quality and structure of the rock mass.%开磷矿业马路坪和用沙坝矿区所施工的部分巷道设计在粘土岩中,经统计,其总长度已超过3300米.目前,大部分已完成施工的巷道出现了不同程度的顶板崩裂、两帮膨胀后遮蔽水沟、底板下凹或上凸等问题.更为严重的是,这些巷道大部分为主运输巷,威胁着过往人员和各类设备的安全.究其原因主要是巷道支护方式与岩体质量类型以及岩体特征不匹配所致.
展开▼
