开采影响下电厂储灰场灰坝损害机理及治理对策

The Damage Mechanism and Control Countermeasures on the Mining-induced Ash Dam of Ash Field in Power Plant

针对电厂储灰场灰坝保护与灰坝下压煤开采之间的矛盾,文中综合采用理论分析,数值模拟及现场实测验证多种方法,研究确定了开采影响下灰坝产生裂缝的临界变形值。基于随机介质理论得到开采影响下灰坝损害的预测预报模型,并以某电厂储灰场灰坝的实际工程为例,通过模型预计与现场实测验证证明该预测方法可靠,为储灰场下压煤开采及灰坝的治理提供了技术基础。针对由开采影响引起的灰坝破坏,提出了科学有效的治理措施,并在实际工程中得到应用,保证了灰坝的安全运行。

According to the contradiction between protecting ash dam of ash field in power plant and mining coal under the ash dam,variety methods of theoretical analysis,numerical simulation and field test are used to validate the critical deformation value of mining-induced ash dam cracks.The ash dam damage prediction model was gained based on stochastic medium theory.Taking an ash dam of ash field in power plant for example,the author verified that the prediction method is reliable,and provides the technology foundation for the treatment of coal mining under ash dam by contrasting the prediction subsidence with field subsidence.The author presents the scientific and effective Countermeasures on the mining-induced ash dam which are applied into the engineering project and ensure the safe operation of ash dam.