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在隐伏煤田浅部薄基岩综采过程中,时常遇到覆岩下工作面中发生“压架子”事故,造成严重安全威胁和巨大经济损失。以淮南潘谢矿区为例,在分析水文地质条件基础上,从底部松散层富水性、风化带厚度与覆岩力学性质的角度系统分析其影响因素,并建立区内“脆性顶板与强富水含水层”与“软弱顶板与弱富水含水层”两种条件下的“压架子”成因模式,为该区及类似条件下的煤层安全开采提供了参考。
During the process of fully mechanized mining of shallow thin bedrock coal, it is common to encounter “pressure racking” accident in the working face under the overburden rock, causing serious security threats and huge economic losses. Taking Panxian Mining Area in Huainan as an example, based on the analysis of hydrogeological conditions, the influencing factors were systematically analyzed from the viewpoints of water-rich bottom layer, thickness of weathering belt and mechanical properties of overlying strata, and the “brittle roof and strong Aquifer ”and“ weak roof and weak water-rich aquifer ”under the conditions of “ pressure shelf ”genetic model, for the area and similar conditions for the safe mining of coal provides a reference.