底板采动导水破坏带深度求取方法研究

Calculation Methods for Depth of Floor Water-conductive Fissure Zone Induced by Mining

准确预测底板采动导水破坏带深度是合理设计底板防水安全煤岩柱,解决煤矿底板突水问题的关键。综合分析了开采深度、煤层倾角、煤层开采厚度、工作面斜长等地质采矿条件对底板采动导水破坏带深度的影响。以27个典型工作面实测数据作为训练和测试样本,通过合理选择SVM中核函数、不敏感损失系数、惩罚因子等参数,建立了底板导水破坏深度与各影响因素之间的SVM回归模型。最后进行了测试分析,测试结果表明,采用SVM所建立的关系模型可以较好地根据各影响因素求取底板采动导水破坏带深度,获得的底板导水破坏带深度精度可靠、能够满足设计需要。研究成果表明:采用SVM的方法计算底板采动导水破坏带深度是可行的,该方法可以综合考虑对底板采动导水破坏带深度影响的多种因素,为今后快速准确地计算底板采动导水破坏带深度提供了一种新的方法。

Accurate prediction for depth of floor water-conductive fissure zone is the key to rationally designing protective coal and rock pillar for water prevention.This paper analyzed the influence of mining depth,coal seam dip,mining height and face length on depth of floor water-conductive fissure zone.Taking data observed from 27 typical faces as training and testing samples,it selected rational core function,non-sensitive coefficient,penalty factor in SVM and set up a SVM regression model of height of floor water-conductive fissure zone and every influence factor.Testing result showed that this model could obtain accurate height of floor water-conductive fissure zone and meet design need based on all influence factors.This method could make use of multi-factor of influencing depth of floor water-conductive fissure zone and provided a new method for future accurate and fast calculation of floor water-conductive fissure zone depth.