近浅埋煤层大采高综采工作面覆岩活动规律

Movement Behavior of Overlying Strata in Shallow Seam High Cutting Height Fully Mechanized Mining

摘要: 综合采用现场观测、理论分析和数值模拟的方法,着重研究昌汉沟煤矿15105近浅埋煤层大采高综采工作面覆岩活动规律,研究表明:15105大采高综采工作面上覆岩层存在2个关键层,2关键层断裂的不同步性及其相互作用使工作面周期来压呈现非均匀性大小周期的特点,并且大周期时动载现象明显、煤壁片帮冒顶等现象较严重,地表有微弱下沉现象。
- 近浅埋煤层 /
- 厚基岩 /
- 大采高综采工作面 /
- 覆岩结构
Abstract: Three methods of spot observation,theoretical analysis and numerical simulation are applied integrally to focus on the large mining height overburden mechanics with shallow buried coal seam in Changhangou 15105 working face.The results showed that due to the non-synchronization of the fractures and interaction between the two key-layers existing in the overburden strata,the periodic weighting step is extremely uneven and presented as a large and a small period alternately;during the large period,the dynamic load appears obviously and sloughing and roof fall are serious with slightly ground subsidence level
- shallow buried coal seam /
- thick bedrock /
- high cutting height fully mechanized working face /
- overlying strata structure

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