基于三维路线精测方法确定深部工程岩体强度  

Obtaining strength of deep rock mass based on the accurate measurement along three dimension routine lines

作　　者：张艳博[1,2] 何满潮[1] 刘文涛[3] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]河北理工大学资源与环境学院,唐山063009 [3]中国地质大学(北京)工程技术学院,北京100083

出　　处：《岩土力学》2009年第5期1431-1435,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金重大项目(No.50490270);河北省自然科学基金项目(E2008000410)

摘　　要：在深部采矿工程中,针对岩石质量指标RQD(rock quality designation)存在的问题,提出了先按岩性的不同将岩体进行岩组RG(rock group)划分,再对不同岩组分别进行三维RQD指标量测的方法。基于路线精测方法,通过对孔庄煤矿深井工作面不同岩组进行三维RQD实测和统计分析,得到了在岩石单轴抗压强度基础上深部节理化岩体强度折减系数,并由换算公式确定了工程岩体的等效强度。研究成果有助于对深部岩体结构特性进行定量化评价,为合理确定深部岩体的强度提供新的思路。Under deep mining, according to the modified rock quality designation（RQD）, namely, the different rock groups are classified as different lithologic characters at first; then three-dimensional RQD is measured as the corresponding rock groups. By using the method of accurate measurement along three-dimensional routine lines, the RQD of the three-dimensional surrounding tockmass in the tunnel headings at Kongzhuang Mine is figured out and statistical analysed. Based on these results, the jointed rockmass strength reduction coefficients are obtained; and the engineering rockmass equivalent strength is calculated as reduction formula to the rock uniaxial compression strength. The research findings are good to the quantitative assessment for the rockmass structure character; and it is a new method to define the deep rockmass strength properly.

关 键 词：岩体分类 路线精测方法 工程岩体 深部开采 

分 类 号：TD325[矿业工程—矿井建设]