A method for safely recovering a residual coal pillar in a columnar goaf of an old kiln
By using three-dimensional geological models and dynamic monitoring technology, the problem of insufficient stability identification in the recovery of coal pillars left in old mine goaf areas was solved, realizing safe and efficient coal resource recovery and improving the overall structural stability and resource recovery rate of the goaf area.
CN122407186APending Publication Date: 2026-07-17INNER MONGOLIA UNIV OF SCI & TECH
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- INNER MONGOLIA UNIV OF SCI & TECH
- Filing Date
- 2026-03-25
- Publication Date
- 2026-07-17
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Figure CN122407186A_ABST
Abstract
本公开提供一种老窑房柱式采空区遗留煤柱安全回收方法，所述方法包括：对房柱式采空区实施钻孔取芯及三维激光扫描，获取遗留煤柱的几何尺寸、空间分布及顶底板岩层力学参数，并构建三维地质模型；基于所述三维地质模型，对所述遗留煤柱进行稳定性诊断和关键柱识别，将所述遗留煤柱分为Ⅰ类可采柱、Ⅱ类临界柱和Ⅲ类关键柱；基于所述三维地质模型，对所述Ⅲ类关键柱进行充填加固，形成第一煤柱‑充填体复合体；基于数值模拟制定协同回收序列，并实施动态监测，获取监测数据，当所述监测数据触发监测预警阈值时，启动应急调控，否则继续回收。
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