采矿与岩层控制工程学报2024，Vol.6Issue(1)：34-47,14.
基于IFM-KS模型的多层煤开采上覆岩层移动模型
Research on overburden rock movement model based on IFM-KS model for multi-seam coal remining
程健维 1盛树平 1冉德志 1马永侦1
作者信息
- 1. 中国矿业大学 安全工程学院,江苏 徐州 221116
- 折叠
摘要
Abstract
Repeated mining of dual coal seams will reactivate the stable rock layers caused by mining of a single coal seam,exacerbating the impact of deformation and damage.Therefore,it is of great significance to study the laws of overlying rock strata movement caused by repeated mining of coal seams.Based on the influence function method-key stratum(IFM-KS)model,a rock strata movement calculation model suitable for multi-layer mining conditions was proposed,revealing the movement and deformation laws of rock strata after secondary disturbance due to repeated coal seam mining.The accuracy of the new model for predicting rock movement in dual coal seam mining was verified by theoretical calculation and numerical simulation with UDEC.The results of theoreti-cal calculation of rock displacement had the same trend as those of numerical simulation,with an average error rate of about 15％.Based on the calculation results of the rock movement model and the porosity of the interlayer and overlying strata,compared with single-layer coal mining,the porosity of the goaf caused by the mining of dual coal seams changes sharply,and the rock damage tends to be more severe.The upper and lower goaf can be connected through cracks forming air leakage channels.This calculation model can provide certain guidance for prediction of rock deformation and analysis for the distribution of porosity in goaf areas under similar mining conditions.关键词
岩层移动/关键层/影响函数法/重复开采Key words
strata movement/key stratum/influence function method/repeated mining分类
矿业与冶金引用本文复制引用
程健维,盛树平,冉德志,马永侦..基于IFM-KS模型的多层煤开采上覆岩层移动模型[J].采矿与岩层控制工程学报,2024,6(1):34-47,14.
