厚煤层端头放顶煤工作面区段窄煤柱留设技术研究

doi:10.11799/ce202608010

摘要/Abstract

摘要：

为有效回收厚煤层呆滞煤炭资源、减小煤柱留设损耗、解决窄煤柱巷道围岩控制难题，以三元煤业3号厚煤层端头放顶煤工作面为工程背景，采用理论分析、FLAC^3D数值模拟与现场实践相结合的研究方法，探究不同煤柱宽度、切顶卸压工况下巷道围岩塑性区、应力场与变形场演化规律，提出了超前工作面静态膨胀预裂切顶卸压技术方案，并基于预应力加固拱原理设计非对称锚杆（索）联合支护方案。结果表明：随着区段煤柱宽度的增大，煤柱横断面由单峰值凸型受力状态逐步转变为双峰值受力状态；切顶卸压措施不仅可为区段煤柱留设创造有利的应力环境，还有利于端头放顶煤工作面回采巷道顶煤的回收，切顶措施下区段煤柱横断面的受力与变形更具对称特征。现场实践表明，该技术方案可保障6m宽区段窄煤柱的成功留设，相比原有12m煤柱多回收6m区段煤柱，煤层采出率显著提高，实现了窄煤柱护巷端头放顶煤工作面的安全协调开采。

关键词: 端头放顶煤, 区段窄煤柱, 切顶卸压, 非对称锚网支护, 围岩控制

中图分类号:

TD823

宋志强, 郭高峰, 赵宝友. 厚煤层端头放顶煤工作面区段窄煤柱留设技术研究[J]. 煤炭工程, 2026, 58(8): 70-79.

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