As a large coal and grain producing province in Central China,the contradiction between safe and efficient coal mining and cultivated land protection,grain production is more prominent in Henan Province. How to re- pair the damaged farmland due to coal mining,protect the undamaged farmland in the mining area,and stabilize the coal production capacity is one of the major problems facing the central coal grain compound area. Based on the analysis of the typical characteristics and the bottleneck problems of the central coal grain compound area,this paper analyzes the research and development progress of mining subsidence and farmland damage from four aspects:mining overburden and aquifer damage,surface subsidence law and soil degradation,mining farmland damage and crop growth,source subsid- ence control and land damage repair technology. It includes the failure of aquifer and structural instability,the definition and criterion of full mining,the overall response behavior of surface subsidence and overburden failure,the impact of sur- face subsidence on soil degradation and cultivated land damage,the identification of cultivated land damage and crop growth monitoring in subsidence area,and the remediation technology of coal mining damaged land. Based on the a- nalysis of the current investigations,four development directions of mining subsidence and cultivated land damage in the central mine grain complex area are presented:the transmission mechanism of overburden strata structure instabili- ty and aquifer damage caused by mining,the law of mining induced surface subsidence and the mechanism of land dam- age,temporal and spatial evolution law of cultivated land damage and crop growth in mining area,and the efficient col- laborative restoration technology for controlling overburden failure and reducing surface subsidence from the source. These four directions will help to obtain the transmission coupling mechanism of ‘overburden failure-surface subsid- ence-cultivated land damage-crop responses’. Finally,the paper will present an efficient collaborative rehabilita- tion technological system for mining subsidence and cultivated land damage in central coal grain compound area. It will provide theoretical and technical supports for green coal mining and food security.

1 中部矿粮复合区概况

2 采动覆岩与含(隔)水层破坏

   2.1 采动覆岩破坏及结构失稳

   2.2 覆岩破坏充分采动的定义及判据

   2.3 采动含(隔)水层破坏及其判据

3 采动地表沉陷规律与土壤退化

   3.1 采动地表沉陷规律

   3.2 采动地表沉陷与覆岩破坏整体响应行为

   3.3 地表沉陷对土壤退化的影响

4 矿区耕地损毁及农作物长势

   4.1 沉陷区耕地损毁识别及时空演变规律

   4.2 采动影响下沉陷区农作物长势监测

5 源头减沉控损与土地损毁修复技术

   5.1 源头减沉控损技术

   5.2 煤炭开采损毁土地修复技术

6 问题与展望

   6.1 存在问题

   6.2 研究展望