非线性耦合围岩分类技术及其在金川矿区的应用  

Non-linear coupling classification technique of surrounding rock mass and its application in Jingchuan Mine

作　　者：余伟健[1] 高谦[1] 韩阳[2] 张周平[3] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]河南工业大学土木建筑学院,河南郑州450052 [3]金川集团公司,甘肃金昌市737100

出　　处：《岩土工程学报》2008年第5期663-669,共7页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(50678060);金川公司攻关项目

摘　　要：非线性耦合围岩分类技术是一种在岩石工程系统思想的基础上,考虑影响因素的综合作用,注重工程状态变化特点的围岩评价方法。该方法首先寻找所有的影响因素和现场样本值;然后应用神经网络产生耦合作用矩阵,提出稳定性分类技术指标;最后由回归统计分析得到各稳定性参数范围,讨论主要影响因素及作用机理。研究发现:当围岩分别处于极不稳定、不稳定、稳定、较稳定、很稳定这五种状态时,评价指标Sp相应范围分别是0～0.24,0.24～0.46,0.46～0.72,0.72～1.15,>1.15;原岩强度、岩体结构、RQD值、支护方式是影响金川矿区围岩工程稳定性的最有利因素,而工程埋藏深度、地下水渗透大小、结构面的张开度、硐室走向与结构面产状关系则是影响金川矿区围岩工程稳定性的最不利因素。非线性耦合围岩分类技术在1120水平巷道工程中的应用结果表明,该技术能够随时监测围岩的稳定状态,并能及时地为支护设计提供可靠的理论依据。The non-linear coupling classification technique of surrounding rock mass was put forward based on the rock engineering system, considering the combined action of influential factors and paying attention to the variation of engineering state. All the influential factors and in-site sample values were firstly searched, then the nerve net was applied to establish coupling effect matrix. The stability classification index was put forward, and the scopes of stability parameters were obtained by the regress statistic analysis of the main influential factors and mechanism of action. It was indicated that, when the rock mass was in five stability states of worst instability, instability, stability, more stability, best stability, then five corresponding scopes of Sp were 0-0.24, 0.24-0.46, 0.46-0.72, 0.72-1.15, 〉1.15, respectively. Through analysis of the main factors, intact rock strength, rock mass structure, RQD value, and supporting method were taken for the four most beneficial factors to rock mass stability of Jinchuan Mine. But the exploitation depth, groundwater permeability, open degree of structure face, and relation of engineering alignment and discontinuity occurrence were taken for the four worst factors. It was indicated by the application of 1120 m-roadway engineering in Jinchuan Mine that the stability state of surrounding rock mass could be inspected by this technique dynamically to provide duly reliable theoretical basis for the supporting design.

关 键 词：岩石工程 非线性耦合 围岩分类 影响因素 作用矩阵 技术指标 

分 类 号：TU457[建筑科学—岩土工程] TD322[建筑科学—土工工程]