生态脆弱矿区煤层顶板水井下储存结构及其稳定性研究

项目名称： 生态脆弱矿区煤层顶板水井下储存结构及其稳定性研究

项目编号： No.51304208

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 矿业工程

项目作者： 姚强岭

作者单位： 中国矿业大学

项目金额： 25万元

中文摘要： 我国西部干旱半干旱矿区，生态环境及其脆弱，如何实现煤炭与水资源共同开采显得尤为重要。煤层开采过程中，上覆含水层随着岩层移动而下渗不可避免，甚至在隔水层缺失或破坏地段发生突水事故。为此，本课题以我国陕北、宁东煤田干旱半干旱地区侏罗系煤层为例，采用理论分析、岩石与相似模拟试验、数值计算方法研究生态脆弱矿区煤层开采过程中顶板水井下储存空间结构及其稳定性。通过研究单一煤层采区/带区内区段/分带不同开采顺序顶板水流动规律及其矿井水储存结构赋存形态，提出实现顶板水井下储存的技术原理；研究矿井水储存结构边界煤岩体水作用下长期强度特征和支承压力的长期演化规律，提出储水结构边界煤柱载荷及其长期强度计算方法；研究不同含水状态下侏罗系典型煤层、顶底板岩层强度、声发射特征，提出储水结构边界煤岩体变形失稳的预测指标。

中文关键词： 煤系沉积岩；地下储水结构；含水率；水-岩作用；

英文摘要： How to realize co-extraction of coal and water resources is particularly important in the arid and semi-arid mining area of western China, whose ecological environment is extremely vulnerable. And it is inevitable that the overlying aquifer will infiltrate downward due to movement of the strata in the process of mining, and may even lead to water inrush accidents in the sections where the aquifer is on-existent or destroyed. Based on these, taking the Jurassic coal seam of arid and semi-arid area in the coal field of northern Shaanxi and Ningdong as an example, this project has studied the spatial structure of underground storage of roof water in ecologically vulnerable mining area during coal mining and its stability by using the following methods, theoretical analysis, experiment of rock and similar simulation, and numerical calculation. Technology principles which realize underground storage of roof water have been put forward by studying the flow law of roof water and its occurrence mode of storage spatial structure in single coal seam when different mining sequences are adopted in the following three conditions, mining district, inner sublevel of strip district, strip; Methods which calculate the load and long-term strength of the boundary coal-pillars that used to protect storage structure have been put fo

英文关键词： coal-series sedimentary rocks；water-storage structure；moisture content；water-rock interaction；