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Reasonable coal pillar design and remote control mining technology for highwall residual coal resources

机译：高墙残煤资源的合理煤柱设计与遥控开采技术

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摘要

Highwall mining (HWM) technology is an efficient method for exploiting residual coal resources in Chinese open-pit coal mines. However, on-site personnel and equipment can be damaged by the instability of the highwall mining residual coal pillars and subsidence of final end-walls. This paper considers the geological conditions of an open-pit mine in Shendong Coal Field (China) in order to prevent overlying rock fall accidents; the Mark-Bieniawski formula and the FLAC3D numerical simulation are used to analyse reasonable coal pillar widths outside and under the road, which were determined to be 1.7 m and 1.3 m, respectively. Using the EBH132 cantilever excavator for remote control mining, the field experiment shows that the recovery ratio of highwall residual coal resources was over 67%; hence, safety, efficiency and high recovery ratio of highwall mining were achieved for the residual coal resources of an open-pit mine.
机译：高墙采矿（HWM）技术是一种在中国露天煤矿中开采剩余煤炭资源的有效方法。但是，由于高壁开采残余煤柱的不稳定性和最终端壁的沉陷，可能会损坏现场人员和设备。本文考虑了神东煤田（中国）露天矿的地质条件，以防止上覆的岩崩事故。利用Mark-Bieniawski公式和FLAC3D数值模拟分析了道路外部和道路下方合理的煤柱宽度，分别确定为1.7 m和1.3 m。使用EBH132悬臂式挖掘机进行遥控开采，现场试验表明，高壁残煤资源的采收率超过67％。因此，该露天煤矿剩余煤资源可实现安全，高效，高回采率。

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