基于三维节理网络模拟的顶煤块度预测研究  

Research on Fragmentation Prediction in Top Coal Based on Three Dimensional Joint Network Simulation

作　　者：荆永滨[1,2] 孙光中[1,3] 冯兴隆[4] 

机构地区：[1]河南工程学院安全工程学院 [2]煤矿灾害预防控制实验室河南省高校重点实验室培育基地,郑州451191 [3]中南大学资源与安全工程学院,长沙410083 [4]玉溪矿业有限公司,玉溪653100

出　　处：《科学技术与工程》2014年第18期183-187,共5页Science Technology and Engineering

基　　金：河南省教育厅科学技术研究重点项目(13B440925);河南工程学院博士基金项目(D2013021)资助

摘　　要：顶煤块度是放顶煤开采的关键,以往的块度预测方法主要是考虑节理裂隙影响的原始块度预测;而顶煤块度还与地应力及煤体的力学性质有关。以放顶煤开采的顶煤为研究对象,通过构建三维节理网络系统,对顶煤的原始块度、破断块度及放出块度的预测方法进行研究。统计分析原始构造面的空间分布状态和构造面几何参数的概率分布规律;通过Monte Carlo及破断块度修正系数模拟考虑地应力及煤体力学性质影响的三维节理网络系统;研究三维模型快速切割算法建立节理面切割的顶煤破断块度预测模型。通过提出的顶煤块度预测方法,为坚硬煤体放顶煤开采的放煤工艺过程研究提供理论和技术基础。Fragmentation of top coal plays an important role in top coal caving technology. The fragmentation prediction methods used in the past mainly focused on the joints only and aimed at the original fragmentation. Nevertheless, the fragmentation of top coal also depends on the in-situ stress and mechanical properties of coal. Top coal as a research object is took, and performed methodic study on original fragmentation, caved fragmentation and drawing fragmentation by building a three dimensional joint network. Spatial distributions of original discontinuities were analyzed to obtain probability distribution law of discontinuities＇ geometric parameters. Monte Carlo simulation was utilized to build three dimensional joint network considering involving the influence of in-situ stress and mechanical properties of coal by introducing and correction factor of caved fragmentation. Fast cutting algorithm of three dimensional models by joint planes was prompted to construct the original and caved fragmentation model. The fragmentation prediction method provided theoretical and technical basis for technology of top coal caving of hard coal seam.

关 键 词：放顶煤开采 节理网络 三维块度预测 MONTE CARLO模拟 

分 类 号：TD823.49[矿业工程—煤矿开采]