裂隙巷道围岩采深-强度响应面模型研究  

Study on mining depth-strength response surface model of surrounding rock in fractured roadway

作　　者：董致宏 席迅 郭奇峰[1,2] 冯志楼[1,2] DONG Zhihong;XI Xun;GUO Qifeng;FENG Zhilou(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;Key Laboratory of High-Efficient Mine and Safety of Metal Mines of Ministry of Education,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]北京科技大学金属矿山开采与安全教育部重点实验室,北京100083

出　　处：《华中科技大学学报（自然科学版）》2022年第5期89-94,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：中央高校基本科研业务费专项资金资助项目(FRF-IDRY-20-032).

摘　　要：为研究节理发育带岩石的强度特性在不同开采深度下的变化规律,并对裂隙巷道围岩进行强度预测,以云南某矿区内从800~1500 m不同深度的灰质白云岩为研究对象,从节理发育程度、岩体弹性模量变化及岩石含水率三个受深度变化影响且影响岩石强度特性的因素展开分析,通过数值正交模拟探究不同影响因素与节理发育带岩石抗压强度之间的响应函数,进而建立节理发育带岩石强度与岩体埋深之间的响应关系.发现对于该地区裂隙巷道围岩的单轴抗压强度,影响最显著的因素为节理间距.最后利用实测实验结果对响应关系进行验证,研究结果表明:所得到的采深-强度响应面函数与实测值响应性较好,适用于计算该区域内不同埋深的岩石的单轴抗压强度,且随着岩石埋深的加深,其强度值越靠近该深度下岩石单轴抗压强度值分布的均值,可以将该响应模型用于深部裂隙巷道围岩强度预测.To study the variation law of the strength characteristics of the rock in the joint development zone under different mining depths and predict the strength of the surrounding rock in fractured roadway,taking the calcareous dolomite at different depths from 800 m to 1500 m in a mining area in Yunnan as the research object,three factors which were affected by depth change and could affect the strength characteristics of rock,including the development degree of joints,the change of elastic modulus of rock mass and water content of rock were analyzed,and the response functions between different influencing factors and compressive strength of rock in joint development zone were explored through numerical orthogonal simulation,so as to establish the response relationship between rock strength in joint development zone and buried depth of rock mass.It is found that the most significant factor affecting the uniaxial compressive strength of surrounding rock in fractured roadway in this area is the joint spacing.Finally,the response relationship was verified by the measured experimental results.Research results show that the obtained mining depth-strength response surface function has good response to the measured values,and it is applicable to calculate the uniaxial compressive strength of rock with different buried depths in this area.With the deepening of buried depth of rock,the strength value is closer to the mean value of the distribution of uniaxial compressive strength value of rock at this depth,and this response model can be used to predict the strength of surrounding rock in deep fractured roadway.

关 键 词：裂隙巷道 围岩强度 等效岩体技术 深部工程 响应函数 

分 类 号：TU452[建筑科学—岩土工程]