曹家滩煤矿导水裂隙带发育规律影响因素数值模拟

Numerical Simulation on Influencing Factors of Water Flowing Fractured Zone Development in Caojiatan Coal Mine

煤层采后覆岩导水裂隙带发育高度是影响矿井涌(突)水的主要因素之一。以曹家滩煤矿综采条件为背景,运用FLAC 3D软件,模拟分析了固定采高情况下采宽、采深、推进速度对导水裂隙带发育高度的影响,揭示了曹家滩煤矿导水裂隙带发育规律。研究表明,曹家滩煤矿2-2煤层在采高6 m的条件下,煤层顶板导水裂隙带发育高度与工作面采宽、采深成较好的正相关关系,与工作面推进速度呈负相关关系,最终确定曹家滩煤矿2-2煤层的裂采比为27. 8倍。研究成果对矿井防治水工程设计及采煤保水有重要指导意义。

The height of water flowing fractured zone is one of the main factors that affect the water inrush in mine. Based on the background of fully mechanized caving mining conditions in Caojiatan coal mine,FLAC3 D software was used to simulate and analyze the influence of the working face length,mining depth and mining face advance on the height of water flowing fractured zone development under the condition of fixed mining height,revealing the development law of water flowing fractured zone in Caojiatan coal mine. Research shows that Caojiatan coal mine 2-2 coal seam under the condition of mining height at 6 meters,relationship between the coal seam roof water flowing fractured zone height,with working face length and mining depth is of a positive correlation,a negative correlation with mining face advance,ultimately the Caojiatan coal mine 2-2 coal seam’s ratio of fractured zone height to mining height is determined to be 27. 8. The research results have important guiding significance to the work of mine water prevention and control.