小窑破坏区域上覆综采安全开采技术研究及应用

A research and application of safer mining technology for use in longwall panels in zones with underneath coal seams disrupted by small mines

通过对大同煤矿集团公司晋华宫矿下层小窑402盘区破坏区域冒落高度的分析、计算,总结出在坚硬岩层中,当层间距≥32.5m时,在刀柱式或仓房式开采25 m范围内时,可以安全开采;当层间距≤32.5m时,在刀柱式或仓房式开采25 m范围时,考虑采用钻孔注浆技术进行注浆,就可以实现安全开采。

Out of an analysis of the caving height and its calculation of the small--mine--disrupted--zone in the 402 panel in the underneath seams on the brink of Jinhuagong coal mine, this paper concludes with the following： in hard rock strata when the seam distance is ≥32.5m, mining can be safe within 25m from the location of ＂knife-- column＂ mining and ＂barn--room＂ mining. In case the seam distance is ≤32.5m, mining can also be safe when the ＂knife--column＂ mining or ＂barn--room＂ mining is carried out at 25m. But in this case, consideration should be given to carrying out bore--hole grouting to ensure safety.