煤柱群下重复采动覆岩与地表沉陷机理与预测模型研究

项目名称： 煤柱群下重复采动覆岩与地表沉陷机理与预测模型研究

项目编号： No.41301598

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 天文学、地球科学

项目作者： 胡青峰

作者单位： 华北水利水电大学

项目金额： 25万元

中文摘要： 以具体矿山开采工程为研究背景，研究关键层控制下煤柱群的破坏失稳模式以及由此引起的地表移动变形规律和特点，分析该地质采矿条件下覆岩冒落带、裂隙带和弯曲带的发育特点，依据实测数据和试验结果，找出覆岩与地表移动变形的角量参数和概率积分预计参数；研究采动过程中覆岩位移场、破坏场和应力场的演化规律，揭示关键层控制下煤柱群的塌陷机理以及地表裂缝与台阶下沉的发育机理；结合实测数据、试验结果和关键层理论，建立能够体现关键层控制作用的覆岩内部下沉系数模型；基于随机介质理论、关键层理论、Knothe时间函数以及所建立的覆岩内部下沉系数模型，建立关键层控制下多工作面开采覆岩与地表沉陷动态预测模型，并对该预测模型的关键技术进行深入研究。研究成果不仅能够为该类地质采矿的采动损害预测与治理工程提供科学合理的指导和帮助，同时能够进一步丰富和完善开采沉陷理论和关键层理论。

中文关键词： 开采沉陷；关键层；煤柱群；动态预测；

英文摘要： Taking the specific mining engineering as the background, under the control of the key stratum, the instability mode of coal pillar group and the resulting surface subsidence laws and features will be studied, the development characteristics of overlying strata caving zone, fractured zone and bending zone will be analyzed, and overlying strata and surface movement and deformation angle parameters and probability integral prediction parameters will also be found by analyzing the measured data and test results. The subsidence mechanism of coal pillar group and surface cracks will be revealed by analyzing the evolution laws of displacement field, destruction field and stress field of the overlying strata during mining. An overlying strata subsidence coefficient model will be constructed according to measured data, test results, and the key stratum theory; it can reflect the key stratum control function. And then, a Multi-face mining overlying strata and surface subsidence dynamic prediction model will be created based on the stochastic medium theory, the key stratum theory, Knothe time function and the overlying strata subsidence coefficient model; and the key technique of the dynamic prediction model will also be further studied. The research not only be able to provide a scientific and reasonable guidance and ass

英文关键词： mining subsidence；key stratum；coal pillar group；dynamic prediction；