煤层底板开采破坏深度研究综述

Summarization of research on depth of mining failure of coal seam floor

矿井水害是一种严重制约煤矿安全生产的矿井灾害,随着我国煤炭资源采掘部署的不断纵深发展,采场将面临高地应力,底板下高承压水的开采环境,因矿井水害引起的负面效应也愈发严峻。煤层底板开采破坏深度的准确预测是矿井水害防治的重要环节,从煤层底板破坏的空间分布形态、底板破坏相关理论以及底板破坏深度研究方法3个方面,总结了我国煤层底板采动破坏研究的主要进展。主要得出,力学理论研究应综合到考虑底板为各项异性的力学特征以及采场支撑压力和底板承压水对底板破坏特征的影响;统计数学法可在样本数据、影响因素选取和模型算法方面作出优化,以提高预测准确度;室内实验分析可从建模技术、机构设计和量测手段方面作出优化;未来更加趋向于动态的底板破坏深度实时监测技术。

Mine water hazard is a mine disaster that seriously restricts coal mine safety production.With the continuous deep development of China′s coal resources mining and deployment,the mining site will face high land stress,and the mining environment of high pressure water under the bottom plate,and the negative effect caused by mine water hazard is becoming more and more serious.The accurate prediction of the depth of coal floor mining is an important link of mine water damage control.It summarizes the main progress of coal floor mining research from the spatial distribution form of bottom failure,the related theory and the research method of bottom damage.It is mainly concluded that the mechanical theory study should consider the mechanical characteristics of the base and the pit support pressure and pressure water on bottom damage;statistical mathematics can be optimized in sample data,influencing factor selection and model algorithm to improve prediction accuracy;indoor experimental analysis can be optimized from modeling technology,mechanism design and measurement;dynamic real-time monitoring technology in the future.