深部全煤柱间歇开采数值模拟研究

Numerical Simulation Study of Deep Whole Pillar Intermittent Mining

为解决建筑物下深部压煤量较大,煤炭资源回采率低的问题,利用深部开采地表不易达到充分采动的原理,结合条带开采与全柱开采的优点,提出建筑物下深部压煤全煤柱间歇开采技术。结果表明:利用全煤柱间歇开采技术进行深部煤层开采,能充分利用极不充分采动地表变形较小的特点,使建筑物只受第一阶段的静态变形和全柱联合开采阶段的动态变形影响,地表动态变形及最终变形量均较小,减轻或消除了采动对地面受护对象的损害。

To solve the problems of large amount of deep pressed coal under the building and low recovery rate of coal resources, the whole pillar intermittent mining is put forward by using principle that deep mining is not easy to achieve full extraction of surface and combining the advantages of strip mining and whole pillar mining. The results show that deep mining of the whole pillar intermittent mining technology, using the features of small surface deformation of utmost non - full extraction, makes buildings only impacted by the first phase static deformation and dynamic deformation of the whole pillar joint mining stage, which could reduce or eliminate the dam- age to the ground protection object.