strong stratum

The caving of thick and strong roof stratum, key stratum, causes tremendous rock pressure in mine.

采场上覆岩层中的厚硬岩层, 即厚硬关键层, 其冒落会造成剧烈的矿山压力显现.

Reinforces the measure not carries on reinforcement processing in view of the right flank main hole in the accumulative stratum and the strong regolith contact surface spot, existence certain flaw.

加固措施没有针对右侧主洞在堆积层与强风化层的界面部位进行加固处理，存在一定缺陷。

The inner-bracing soldier pile retaining system has the advantages of high reliability, no trespassing red line, strong stratum adaptability, being easy to be combined with the top-down construction method, etc*, which is widely used in deep excavation supporting system in soft soil area.

在软土地区基坑支护中，内撑式排桩支护体系由于具有较高的可靠性、不侵越红线、地层适应性强、便于与逆作法施工相结合等优点而得到广泛应用。

Tectonization in late Alpine movement can be divided into five strong tectonic episodes based on the characteristics of stratum sediment and unconformity.

晚阿尔卑斯挤压构造运动在该地区可划分出5个较为强烈的构造活动幕次。