急倾斜特厚煤层综放面过边界煤柱研究

Study on the fully-mechanized caving face of steep-inclined and extra-thick coal seam through boundary coal pillar

急倾斜特厚煤层综放开采已是我国综放开采的一种典型方法。采用高阶段综放开采,需对放煤高度进行限制,放高太大不仅顶煤难以回收,而且存在安全隐患,尤其是过分段及小煤窑边界煤柱时,易于发生安全事故。针对该矿综采工作面的具体地质条件,结合数值模拟实验,提出过边界煤柱的技术措施,为煤矿安全生产提供一定的技术支持。

The fully-mechanized caving mining of steep-inclined and extra-thick coal seam was already a typical method of fully-mechanized caving mining in our country. The sublevel fully-mechanized caving mining need to restrict the caving coal height. If the caving coal height was too large,not only the top-coal was difficult to be recovered,but also the caving face had safety hazard. Especially when the caving face through the stage boundary coal pillar and stage boundary coal pillar of small coal mines,it is prone to cause safety accident. According to the specific geological conditions of the fully-mechanized mining face,and combined with the numerical simulation experiment,the technical measures for caving face through coal pillar was put forward,which provided the technical support for coal mine safety production.