The study aims to evaluate the pillar behavior during the depillaring operation by continuous miner (CM) technology. A panel with five headings developed as per the coal mine regulation of Indian coal mines [2] has been selected for the study. The depillaring operation has been carried out using CM technology after widening and heightening the original entries. An extensive field investigation has been carried out throughout the depillaring operation to access the mining conditions. Depillaring operation has been performed smoothly up to the middle of the panel (fourth row out of eight rows of four pillars each). Advanced blinking of the auto warning tell-tale (AWTT) has also been observed on some of the instruments during the splitting of pillar no. 18. The panel shows extremely difficult mining conditions at this stage. The case has been numerically simulated using three-dimensional numerical techniques. The simulation result has indicated the high stress and yield condition on the working and the barrier pillar (surrounding goaf from both sides) after the extraction of pillar no. 18. The analysis has also indicated the marginal stability of the 2nd barrier pillar (namely “pillar B”). The failure of the barrier pillar could be the responsible for global instability of the panel as observed in the field. Understanding the importance of the barrier pillars, panel design has been modified by incorporating an additional row of barrier pillars. The stability of the modified panel has been evaluated. Both working and barrier pillars have been observed stable in the modified panel. This could be an alternative layout considering safety at the working face.

该研究旨在通过连续采矿机（CM）技术评估脱柱作业期间的支柱行为。根据印度煤矿 [2] 的煤矿法规开发的具有五个标题的面板已被选中进行研究。在加宽和加高原始条目后，使用CM技术进行了脱柱作业。在整个脱柱作业中进行了广泛的现场调查，以了解采矿条件。脱柱操作一直顺利进行到面板中间（八排四根柱子中的第四排）。自动警告信号的高级闪烁（AWTT) 在第 1 号支柱分裂期间，在一些仪器上也观察到。18. 面板显示现阶段采矿条件极其困难。该案例已使用三维数值技术进行了数值模拟。模拟结果表明，在第 1 号柱抽出后，工作柱和障壁柱（两侧围空区）处于高应力和高屈服状态。18. 分析还表明，第 2 个障碍柱（即“ B柱”）的边际稳定性”）。正如在现场观察到的那样，屏障柱的失效可能是造成面板整体不稳定的原因。了解障碍柱的重要性后，面板设计已通过增加一排障碍柱进行了修改。已评估修改后的面板的稳定性。在修改后的面板中观察到工作柱和屏障柱都是稳定的。考虑到工作面的安全性，这可能是一种替代布局。