基于GIS的高潜水位煤矿区边采边复表土剥离策略

    Topsoil stripping strategy for concurrent mining and reclamation construction in high groundwater coal mines based on GIS

    • 摘要: 高潜水位煤矿区采煤塌陷后积水现象严重,积水后再治理造成复垦后耕地所占比例低,复垦成本增多,且施工难度增大。在地面沉陷积水前,预先进行表土的剥离存储以便后期复垦利用,是提高复垦效率的最有效方法。本文以山东某矿工作面为例,结合GIS的空间分析功能,将地面划分为40m×40m的地面格网单元(共7875个),对煤炭开采后地面的动态沉陷过程进行了模拟,明确了地面开始沉陷及出现积水的时间,最后定量的确定了461个地面格网单元表土剥离的时间、范围与深度,剥离的表土可用于后期土地复垦工作。研究有利于井工煤矿区的边采边复技术的研发,并促进开采与治理的同步进行。

       

      Abstract: Coal mining in high groundwater areas leading to mining subsidence ponds. Reclamation works are of a low-percentage of reclaimed farmland, difficult construction work condition, and high reclamation cost manner, because of relatively flat terrain, and the shortage of filling materials in plain mines. Therefore, it is an efficient manner to strip the topsoil before surface inundated and reuse it while subsidence became stable. This paper taking a longwall panel in Shandong province as case study, dynamic mining subsidence was simulated by employing mining subsidence prediction software, subsidence development and its affects to farmland was illustrated subsequently. The ground was firstly divided into 7875 cells by 40m×40m, by integrating the pre-mining topography, mining subsidence and water logging time for each cell was then calculated. Based on the simulations, 461 cells were involved in topsoil removal, furthermore, the removal time, scope, and depth of topsoil was determined accordingly. The stripped topsoil could be reused subsequently. The research could benefit the development of concurrent mining and reclamation technology in underground mining sites, and promoting the synchronization of exploitations and treatments.

       

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