赵官井田10煤层底板突水危险性评价

从地质构造、含水层、隔水层、开采条件等方面详细分析了赵官井田10煤层底板突水的影响因素,确定了断层强度指数、褶皱分维值、"底板充水含水层组"水压、"底板充水含水层组"富水性、奥灰富水性、隔水层厚度、泥岩比率、底板破坏深度8个主控因素作为10煤层底板突水危险性评价的决策指标,并建立了各主控因素专题图;运用层次分析法(AHP)确定了各主控因素的权重系数,建立了基于"脆弱性指数法"的底板突水危险性评价模型,对10煤层底板突水危险性进行了定量评价,结果表明:在井田的南部煤层露头处脆弱性指数小,突水可能性较小;在井田的北部,特别是在井田东北部,脆弱性指数大,突水危险性较大。 

Evaluation of water inrush risk for No.10 coal seam floor of Zhaoguan mine field

The main factors influencing the water inrush of seam floor are studied based on geologic structure, aquifer, aquiclude and mining conditions. Eight parameters are taken as indexes for forecasting the water inrush risk, including fault intensity index, fold fractal dimension, water pressure, water abundance of "lower aquifers", water abundance of Ordovician limestone, aquiclude thickness, the percentage of mudstone and the depth of destroyed floor caused by coal mining. The paper uses analytic hierarchy process (AHP) method to sequence the main controlling factors, and then to establish the vulnerability index for evaluating water inrush risk in the floor of coal seam 10. The evaluation results show that the value of vulnerability index and water inrush risk are small in the southern part and high in the northeast of the minefield.