深部复杂地质条件下矿井交岔点支护关键技术研究

The Key Technology for the Cross Section Supporting under Complex Geological Condition at Great Depth

摘要:

由于具有断面大、结构复杂、施工扰动次数多等特点，深部条件下的矿井交岔点工程支护难度一般比较大。通过现场地质条件的调查，用确定施工工程难度系数的方法，选择对应的支护形式和参数。深部复杂地质条件下的大断面交岔点，主要具有4种变形力学机制，即构造庖力作用力学机制、白重应力作用力学机制、结构变形力学机制和与施工过程有关的变形力学机制。在分析变形力学机制的基础上，可以进行最优的支护参数设计和过程设计。优化后的试验方案应用于具体的工程实例，取得了良好的支护效果。

Abstract:

Due to the characteristics of large span, complex structure, and liability to the disturbance of operation, cross sections of deep engineering are somewhat difficuh to support. Through the field investigation in geological condition, a difficulty coefficient and the eorresponding supporting types and parameters were determined. Four primary deformation mechanics, i.c. mechanics of tectonic stress interaction, mechanics of self-welght stress interaction, mechanics of structure deformation, as well as deformation related to operational sequence were summarized out. Based on the analysis of these deformation mechanics, the cable and bolt supporting parameters and operation sequences were optimized. The supporting plan was put into operation and a sound effect has been achieved.