深部开采保护煤柱的设计方法

Design of protective coal pillar for deep mining

为了减小或者完全避免地下开采对地表建筑物的有害影响,根据深部开采地表移动的实测数据,本文给出了地表移动和变形预计参数,利用概率积分法对地表任意点的下沉值进行计算,分析了建筑物受地下开采的影响程度,以此对矿区地表建筑物保护煤柱进行设计。研究表明,基于地表移动和变形预计理论的保护煤柱设计方法,对减少深部开采保护煤柱的压煤量、保护地表建筑物、实现地下煤炭开采的可持续发展具有一定的参考价值。

The reservation of coal pillar is very important to protect ground structures. The predicting parameters of the Probability Integral Method were calculated by analyzing the practical data from ground observation stations in the paper, the protective coal pillar was designed by using the major influence radius. The surface subsidence values were calculated by the Probability Integral Model, and the contour and three-dimensional graph of the surface subsidence were developed. Based on the predicted results, the deformation of the structure foundation was analyzed. The research showed that the design method of the protective coal pillar could improve the deep mining rate, effectively protect the ground high buildings from the mining damage, and achieve the sustainable de- velopment of coal mining.