针对风积沙区超大工作面的开采沉陷、土地损伤规律及生态演变趋势认识不清这些关键问题，重点研究：1）超大工作面开采引起的开采沉陷规律研究，包括地表移动变形分布、地裂缝发育与分布规律；2）开采沉陷对土地损伤与生态演变的规律研究，包括风积沙区开采引起的土地损伤与生态演变的指标表达、建立土地损伤及生态退化指标与超大工作面开采沉陷之间的定量关系及空间相关关系；3）采煤工作面上方土地与生态退化的预测与评价，包括土地损伤与生态退化的等级评价、土地退化与生态退化趋势的预测；4）采前土地与生态的保护及采后生态恢复对策，包括受开采影响土地与生态的保护方法、受开采影响风积沙区生态修复的原理与方法。旨在揭示风积沙区超大工作面开采对土地损伤与生态退化的规律，预测土地退化与生态系统演变的趋势，为超大工作面开采条件下的土地与生态环境保护与修复提供原理和方法。

Based on the review of past literatures and present research achievements, we found that the laws of mining subsidence, land damage and ecological degradation due to super large-size coal mining work face with sandy terrain are still not clear. The proposal emphasizes on the resolution of following issues: 1) discovering the laws of mining subsidence, including the distribution of surface movement and deformation, the distribution of surface fissures and their depth; 2) revealing the laws of land damage and ecological degradation by proposing indicators to evaluate the degree of land damage and ecological degradation, conducting the formula between those indicators and surface movement and deformation; 3) the model and methodology to predict the trends of land damage and ecological degradation with time by setting out the standards to praise the level of land damage and ecological degradation and ecological risk forecasting model by scenarios analysis; 4) the strategies for protecting land and ecological system before mining and the theory and measures for ecological reconstruction after mining.