摘要
隆德煤矿北部区红土厚度较薄甚至部分区域红土缺失,基岩厚度较薄,2-2煤层采用传统垮落法开采,对地下水影响较大,引发一系列环境地质问题,故而隆德煤矿采取限厚、充填保水采煤方案。根据限厚、充填保水开采方案开采条件下导水裂隙带分析,导水裂隙带均发育至正常基岩,未波及至松散沙层。通过采用“大井法”“水平廊道法”和“比拟法”3种方法在传统垮落法开采和限厚、充填保水开采方案2种不同开采条件下涌水量的对比,进一步验证采用限厚、充填保水开采方案可以降低矿井涌水量,有效保护萨拉乌苏组沙层含水层,实现保水开采,还可以处理隆德煤矿产生的固体废弃物,取消矸石山。
The thickness of laterite in the northern area of Longde Coal Mine is thin,even missing in some areas,and the thickness of bedrock is thin.2-2 coal seam is mined by traditional caving method,which has a great influence on the groundwater and causes a series of environmental geological problems,therefore,the Longde Coal Mine adopts the plan of limited thickness,filling and protecting water.According to the analysis of water-conducting fracture zone under the condition of limited thickness and filling water-retaining mining scheme,the water-conducting fracture zone developed to normal bedrock and did not extend to loose sand layer.Through the comparison of the water gushing amount under the traditional caving mining method and the scheme of limited thickness and filling and water-retaining mining,the three methods of“large well method”,“horizontal corridor method”and“analogy method”are adopted,it is further verified that the mining plan with limited thickness and backfilling can reduce the mine water inflow,effectively protect the Salawusu formation sand aquifer,realize water-conserving mining,and also can deal with the solid waste produced by Longde Coal Mine,and cancel the coal gangue mountain.
作者
米艳飞
赵金花
MI Yanfei;ZHAO Jinhua(Shaanxi 185 Coalfield Geological Co. ,Ltd. ,Yulin 719000,China)
出处
《陕西煤炭》
2022年第3期22-26,共5页
Shaanxi Coal
关键词
隆德煤矿
限厚
充填
导水裂隙带
保水采煤
涌水量
Longde Coal Mine
limited thickness
filling
water-conducting fracture zone
water-conserving mining
water inflow