嵊泗海域地下淡水资源开发利用方案评价

在上海南汇至浙江省嵊泗列岛之间的长江古河道海底延伸部分,形成于早更新世地层中,蕴藏着丰富的优质地下水资源,是嵊泗岛理想的供水水源。根据"嵊泗二井"勘探资料,在研究海域长江古河道发育规律以及海域地下水赋存规律的基础上,运用MODFLOW软件对嵊泗海域第四系第Ⅰ、Ⅲ含水层,用两种开发方案进行数值模拟。结果表明,在研究区域内可以获得9×104m3/d的地下水资源量;在该海域可以建立永久性的水源地。

Structure Characteristic Analysis in Pingyu No.1 Coalmine, Yuzhou Coalfield, Henan

The Pingyu No.1 coalmine is situated in the middle sector of south limb of Huicuishan-Fenghouling anticline, northeastern Yuzhou coalfield. Strata in the area present a monocline as a whole. Faults are well developed in mine area margin and mid-west part, mainly high angle NW and NE trends normal faults, the NE faults cut NW faults or are confined to, the NW faults play a predominant part in the area. Interlayer-gliding structures are mainly developed near the Ⅱ1 coal seam in the lower part of Shanxi Formation, thus caused coal Seams locally thickening and thinning, coal mass configuration destructed and formed deformed coals. Consequently, hazard of coal-and-gas outburst increasing, coal roofs fall to pieces, bring difficulties to coalmine extracting and supporting.