【摘要】 当前所依据的《三下采煤规程》中没有预计综放开采工作面覆岩破坏高度的经验公式,为了合理留设特厚煤层综放开采工作面露头区安全保护煤岩柱,有必要建立适用于综放开采工作面覆岩导水裂缝带和垮落带高度计算的经验公式。依据项目的实测"两带"成果,并且收集了40余个"两带"孔的综放开采工作面不同硬度类型覆岩的"两带"高度数据,采用数理统计回归分析的方法,得出了适用于综放开采工作面中硬、软弱覆岩条件下的"两带"高度计算的经验公式,并进行了实用性分析。研究成果对含水层下特厚煤层综放开采工作面浅部安全开采和保护煤岩柱的合理留设有指导意义和实用价值。更多还原

【Abstract】 There is not experiential formula for predicting breakage height of overlying strata over full-mechanized caving mining face in current Regulation.It is necessary that setting up experiential formulae for predicting "two-zone" height of full-mechanized caving mining face to instruct protective pillar design.Based on observation result and data from 40 boreholes in full-mechanized caving mining faces with different hardness surrounding rock,experiential formulae of "two-zone" heights fit for medium-hard and soft rock in full-mechanized caving mining were obtained by statistical method.The formulae were applicable for instructing safety mining shallow buried coal-seam and rational protective pillar design in full-mechanized caving mining under aquiferous rock.更多还原