深部破裂围岩承载结构损伤演化机制与锚固控制理论基础

项目名称： 深部破裂围岩承载结构损伤演化机制与锚固控制理论基础

项目编号： No.51474136

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 矿业工程

项目作者： 赵同彬

作者单位： 山东科技大学

项目金额： 83万元

中文摘要： 在深部开采中，巷道围岩内部产生了多区域、大范围的非连续破裂现象，使得传统的围岩控制理论应用受到了较大限制，给煤矿深部巷道支护设计带来了严重挑战。本项目以既定的非连续破裂围岩结构稳定性控制机理为研究目标，首先，研究破裂岩体的后续损伤变形破坏规律及承载力学特性，以波速等参数表征损伤变量，建立基于修正Hoek-Brown准则的损伤力学模型，并研发数值模拟分析系统；其次，研究采动及流变条件下围岩应力场、应变场梯度分布特征，探讨破裂区与完整区交替分布下的围岩自稳结构形成原理，揭示非连续破裂围岩承载结构损伤及破坏演化的力学机制；然后，研究深部破裂围岩结构失稳形式与力学条件，探寻相关的巷道稳定性控制机理及支护方法；最后，研究破裂围岩锚固控制变形与破坏的力学机理，探讨锚固支护关键层位判别原理，提出一种非连续破裂围岩锚固支护设计理论方法。本研究将为深部巷道锚固控制及定量支护设计提供新的理论依据。

中文关键词： 深部开采；破裂围岩；承载结构；损伤机制；支护机理

英文摘要： In deep mining, the non-continuously broken phenomenon with multiple zones and great ranges appears in surrounding rocks. The application of the traditional anchorage controlling theory for surrounding rocks is limited seriously, and the supporting design meets great challenge in the deep roadway. This project aims at the research of anchorage controlling mechanism for the non-continuously broken surrounding rocks. Firstly, research the subsequent damage law and bearing mechanical properties of the broken rocks. Based on the modified Hoek-Brown criterion, build a damage mechanical model, with damage variables expressed by parameters like the wave velocity. And develop a numerical simulation and analysis system. Secondly, based on the gradient distribution characteristics of the stress and strain field in surrounding rocks under mining and rheology, research the formation principle of the bearing structure in surrounding rocks with alternant distributed broken and unbroken zones, and reveal the damage and failure evolution mechanism of the bearing structure. Thirdly, research the failure modes and mechanical conditions of the deep broken surrounding rocks, and investigate the controlling mechanism and supporting methods for the deep roadway. Finally, research the anchorage controlling mechanism of the deformation and failure for the broken rocks. Investigate the discriminating principle of the supporting key stratum, and develop an anchorage design theoretical method for non-continuously broken surrounding rocks. This study may provide new theoretical basis for anchorage controlling and quantitative supporting design for the deep roadway.

英文关键词： deep mining;broken surrounding rock;bearing structure;damage mechanism;supporting mechanism