弱胶结软岩巷道围岩稳定性研究  

Research on Stability of Weak Cemented Soft Rock Roadway

作　　者：苏丽君 刘伟[1] 张全明[1] 

机构地区：[1]兖州煤业股份有限公司兴隆庄煤矿,山东兖州272102

出　　处：《煤矿现代化》2018年第2期33-36,共4页Coal Mine Modernization

摘　　要：内蒙古鲁新煤矿地处内蒙古中东部,围岩主要为砂质泥岩,其典型特征为胶结性差、抗压强度低、软化性强,该类型围岩在陕蒙地区煤矿建设有典型性。为了评判开挖后巷道围岩的稳定性及支护体系的长期安全,需要确定围岩岩体力学参数和初始应力场。首先运用通过多种现代室内实验和原位测量方法,确定该地区软岩物理力学参数和初始应力场分布。然后根据现场初始地应力的实测值模拟分析巷道开挖后产生的围岩位移,巷道开挖完成后的围岩位移的实际监测结果与模拟位移值的一致性表明,试验确定的围岩物理力学参数和初始应力场分布与实际情况是相符,可为后续巷道、采区的合理化布置与支护结构设计提供基础数据,有效地指导了巷道开挖施工。The Luxin coal mine is located in the eastern part of Inner Mongolia Province, the surrounding rock is mainly sandy mudstone,characterized by poor cementation, low compressive strength and softening resistance, this type of rock is typical of Shanxi and Inner Mongolia area of coal construction. In order to evaluate the stability of the surrounding rock and the long-term safety of the support system, the mechanical parameters and initial stress field of the surrounding rock mass need to be determined. Firstly, the physical and mechanical parameters and the initial stress field distribution of soft rock in this area are determined by a variety of modern laboratory experiments and in-situ measurement methods. Then, according to the measured value of in-situ in-situ stress, the displacement of surrounding rock caused by roadway excavation is simulated, Then, according to the simulation analysis of displacement of surrounding rock after excavation of the value of measurement of initial stress field, showed consistency with the simulation of the displacement monitoring results of displacement of surrounding rock after excavation of the tunnel, the physical and mechanical parameters of surrounding rock were determined and the initial stress field distribution is consistent with the actual situation, to provide basic data for the follow-up, reasonable mining area roadway layout and supporting structure design, effectively guide the tunnel excavation.

关 键 词：弱胶结软岩 物理力学性质 地应力测试 

分 类 号：TD325.1[矿业工程—矿井建设]