采场顶柱力学简化计算模型研究
发布时间：2018-09-10 17:19
【摘要】：建立合适的采场顶柱力学简化计算模型是进行采场顶柱稳定性分析的基础。为了探究符合实际且便于工程应用的采场顶柱力学简化计算模型,根据约束条件的不同,将采场顶柱简化为3种常见梁模型:两端固定的梁、简支梁和悬臂梁模型,以均布荷载代替采场顶柱所受上覆岩层压力,应用弹性理论求解出3种采场顶柱力学简化计算模型的应变解析解;同时建立相应的有限元数值计算模型,分析采场顶柱的应变分布特征;将数值模拟所得结果与力学简化计算模型理论计算结果进行对比分析,并以程潮铁矿西区充填法试验采场为例,建立采场顶柱相似试验模型,对相似试验中采场顶柱底部应变进行监测。结果表明:将采场顶柱简化为简支梁力学计算模型所得应变分布特征与数值模拟结果及相似试验监测数据具有一致性;工程中可采用简支梁模型分析采场顶柱的稳定性。
[Abstract]:It is the foundation of stope roof column stability analysis to establish a suitable simplified calculation model of stope top column mechanics. In order to explore the simplified calculation model of stope top column mechanics which accords with practice and is convenient for engineering application, according to the different constraint conditions, the top pillar of stope is simplified into three kinds of common beam models: fixed beam at both ends, simply supported beam and cantilever beam model. In this paper, the stress of overlying strata on top pillar of stope is replaced by uniform load, and the strain analytical solution of three simplified calculation models of stope top column mechanics is obtained by using elastic theory, and the corresponding finite element numerical calculation model is established. The strain distribution characteristics of stope roof column are analyzed, the results obtained by numerical simulation are compared with the theoretical results of simplified mechanical calculation model, and the similar test model of stope roof column is established by taking the filling test stope in the west of Chengchao Iron Mine as an example. The bottom strain of top pillar in similar test was monitored. The results show that the strain distribution characteristics obtained by simplifying the stope top column into a simply supported beam mechanical calculation model are consistent with the numerical simulation results and the monitoring data of similar tests, and the simply supported beam model can be used to analyze the stability of the stope roof column in engineering.
【作者单位】： 武汉科技大学资源与环境工程学院;北京大方安科技术咨询有限公司;
【基金】：国家自然科学基金面上项目(编号:51074115,51574183) 湖北省自然科学基金重点项目(编号:2015CFA142)
【分类号】：TD32
，
本文编号：2235104
[Abstract]:It is the foundation of stope roof column stability analysis to establish a suitable simplified calculation model of stope top column mechanics. In order to explore the simplified calculation model of stope top column mechanics which accords with practice and is convenient for engineering application, according to the different constraint conditions, the top pillar of stope is simplified into three kinds of common beam models: fixed beam at both ends, simply supported beam and cantilever beam model. In this paper, the stress of overlying strata on top pillar of stope is replaced by uniform load, and the strain analytical solution of three simplified calculation models of stope top column mechanics is obtained by using elastic theory, and the corresponding finite element numerical calculation model is established. The strain distribution characteristics of stope roof column are analyzed, the results obtained by numerical simulation are compared with the theoretical results of simplified mechanical calculation model, and the similar test model of stope roof column is established by taking the filling test stope in the west of Chengchao Iron Mine as an example. The bottom strain of top pillar in similar test was monitored. The results show that the strain distribution characteristics obtained by simplifying the stope top column into a simply supported beam mechanical calculation model are consistent with the numerical simulation results and the monitoring data of similar tests, and the simply supported beam model can be used to analyze the stability of the stope roof column in engineering.
【作者单位】： 武汉科技大学资源与环境工程学院;北京大方安科技术咨询有限公司;
【基金】：国家自然科学基金面上项目(编号:51074115,51574183) 湖北省自然科学基金重点项目(编号:2015CFA142)
【分类号】：TD32
，
本文编号：2235104
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