唐山市南湖采煤沉陷区蓄水安全分析与评估  

Analysis and Evaluation of Water Conservancy Security in Nanhu Mining Subsidence Lands of Tangshan

作　　者：高怀军[1] 

机构地区：[1]天津大学管理与经济学部,天津300072

出　　处：《金属矿山》2014年第11期156-160,共5页Metal Mine

摘　　要：唐山南湖采煤沉陷区蓄水的安全问题，涉及到湖泊景观的保持和唐山矿井下的安全生产。基于南湖采煤沉陷区的地质采矿条件，通过计算煤层采后的采动裂缝发育高度，探讨采动裂缝导通地表水的可能性，分析急倾斜煤层露头局部抽冒对地表水的影响，观测近年来地表水与各含水层的水位变化，提取水样检测地表水与地下水的水质相关性，统计分析地表水与井下涌水量变化之间的关系。研究结果表明：唐山市南湖蓄水区域下有厚40—50m的冲积层隔水层，由粘土、砂质粘土组成，隔水性能好，对积水下渗起到阻碍作用；煤层开采引起采动裂隙不会到达冲积层而坡坏冲积层内隔水层的隔水性，局部抽冒不会造成地表水直接进入井下；地表水与地下水的水位、水质、水量相关性分析，进一步表明地表水与井下涌水不存在直接水力联系。因此，唐山市南湖采煤沉陷区蓄水是安全可行的。Water conservancy security in Nanhu mining subsidence land refers to the conservation of lake landscape and downhole production security in Tangshan Mine. According to the geological and mining conditions, the development level of mining-induced fissure is figured out to find the possibility of surface water conduction by the fissure. In addition, the influence of the local caving of steep outcrops on the surface water is analyzed. Besides, it conducts the correlation analysis of water qual- ity between the surface water and the ground water after monitoring the variation of water level. And the variation relationship between downhole water inflow and surface water is also analyzed. The study reveals that there is an alluvium water-resisting layer of about 40 ~ 50 m in thickness under Nanhu water storage area,which is composed of clay and sandy clay. With better water resistance, it can prevent the water infiltration in water storage area. What is more, the mining-induced fissure will not ex- tend to the alluvium so that the water resistance will not affected, thus mining-induced fissure and local caving caused by min- ing will not make surface water sink directly into the down hole. And the correlation analysis among the level, quality and a- mount of water shows that the surface water has no direct hydraulic connection with water inflow and therefore it is feasible to conserve water in Nanhu mining subsidence lands.

关 键 词：采煤沉陷 蓄水安全 水力联系 隔水层 

分 类 号：X936[环境科学与工程—安全科学]