基于单位面积静涌水量双因子的煤层顶板突水危险性评价

Coal Roof Water Bursting Hazard Assessment Based on Static Water Inflow per Unit Area Dual Factors

在单位面积静涌水量单因子评价方法的基础上,引入充水强度(渗透系数、富水系数、单位涌水量等)第二因子,运用空间分析平台进行拓扑分析,提出了双因子煤层顶板突水危险性评价方法。鄂尔多斯市华兴能源有限责任公司唐家会煤矿首采区主要充水含水层为第四系松散层孔隙含水层、白垩系碎屑岩孔隙-裂隙含水层、4煤顶板碎屑岩含水层、及6煤顶板碎屑岩含水层,采用本方法对该矿首采区6号煤进行了煤顶板突水危险评价,分为危险性小、中等、大三个区,并与传统方法进行对比分析。结果表明,该方法的评价结果与采用"三图双预测"方法评价结果基本一致,且采用本方法更为合理,不但进行了区划,还给出各区单位面积静涌水量。

On the basis of static water inflow per unit area single factor assessment method,introduced second factor of water filling magnitude(permeability coefficient,water content coefficient,specific capacity etc).Through spatial analysis platform carried out topological analysis,put forward dual factors coal roof water bursting hazard assessment method.In the first mining area of the Tangjiahui coalmine,Huaxing Energy Co.Ltd.,Ordos City,the main water filling aquifers have Quaternary loose bed pore aquifer,Cretaceous clastic rock pore-fissure aquifer,coal No.4 roof clastic rock aquifer and coal No.6 roof clastic rock aquifer.Using the method above mentioned has carried out coal roof water bursting hazard assessment for coal No.6 in first mining area,according to hazardous grade partitioned into light,medium and severe three areas and carried out comparative analysis with the result from traditional method.The assessment result from the method of the paper is basically consistent with result from the"three zoning maps plus two water inflow predictions"method.While the new method is more reasonable,it not only can carry out hazardous grade partitioning,but also give out each area static water inflow per unit area.