This article offers an examination of a retreat mining method conducted at the Pinoura Mine in India from 2010 to 2017. The method is atypical for coal mines of India’s coalfields. The method executes depillaring in a single pass and does not require the formation of galleries and support installation in splits, thus, reducing the cycle time. A variety of observations are discussed throughout this work and emphasis is placed on field measurements and depillaring under weak roof (RMR = 40–45). This paper discusses design techniques, specifically the estimation of the snook (remnant pillar) size, and important practical observations after the fact. The execution of this method was eventually conducted in eleven panels.

中文翻译：

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弱顶板下煤柱抽采

本文对 2010 年至 2017 年在印度 Pinoura 矿进行的一种后退开采方法进行了研究。该方法对于印度煤田的煤矿来说是非典型的。该方法在一次通过中执行除柱，并且不需要形成通道和分体安装，因此，减少了循环时间。在整个工作中讨论了各种观察结果，重点放在弱顶板下的现场测量和除柱（RMR = 40-45）。本文讨论了设计技术，特别是对 snook（残柱）尺寸的估计，以及事后重要的实际观察。这种方法的执行最终在 11 个小组中进行。