煤矿水文地质勘查中瞬变电磁法的应用

瞬变电磁法对一些低阻体反应较强,在煤矿井下水文地质勘察中有广泛应用.采取该方式可测定含水构造、地下溶洞等不规则水体,规避煤矿开采风险.针对煤矿开采中采空区积水及含水层分布,分析了瞬变电磁法在某煤矿水文地质勘查中的实际应用效果,为煤矿开采合理发展奠定坚实基础.     

边坡面裂隙网络调查与水文地质参数的确定方法初探

阐述了运用裂隙网络几何数值计算水文地质参数的原理与方法,并结合大冶铁矿东采北帮的工程实例进行了具体计算。     

沁水盆地安泽区块煤层气藏水文地质特征及其控气作用

在我国华北地区,煤层气藏的水文地质条件与煤层气的运移、散失、保存、富集等关系密切,但过去很少有学者采取动态监测地下水特征的方式来分析其对煤层气藏的影响。为此,以山西沁水盆地安泽区块煤层气藏为研究对象,在动态监测煤层气产出水离子浓度、水质水型及矿化度变化的基础上,结合该区煤层气井开发实际与地下水动力场分布特征,讨论了不同水文地质单元的产气、产水情况,并利用微量元素检测结果分析了合层排采的井间干扰。最后,结合构造、煤质特征探讨了水文地质条件对煤层气富集与产出的控制作用。结果表明：①该区主力煤层为下二叠统山西组3 号煤和上石炭统太原组15 号煤,煤层顶底板大部分为砂岩和泥质砂岩;②煤层气产出水离子浓度和矿化度随排采时间的增加不断降低,水型以NaCl 型和NaHCO₃ 型为主;③将该区划分为弱径流区、径流区和滞流区3 个水文地质单元,其中径流区产气量最高,滞流区产气量最低,合层排采井受15 号煤的干扰较大。结论认为：该区煤层气的富集主要受断层及水动力条件的控制, 下一步应加大对煤层气优势富集区的开发力度。     

水文地质评价中的灰色系统理论

本文重点阐述了灰色预测理论的基本内容、水文地质系统的灰色特性及其在水文地质评价中的可能应用。并运用灰色预测模型举例进行了计算与分析。     

Hydrogeological studies on the Tarkwa gold mining district,Ghana

The physical hydrogeology of the Tarkwa area has been evaluated with a view to improving the understanding of its groundwater characteristics. It has been inferred that aquifers in the Tarkwa area possess dual and variable porosity and heterogeneous permeability with predominantly limited storage properties. Both soil infiltration and pumping tests have shown that the Banket Series has the best hydraulic features, but the Banket rocks are host rocks for gold. The effect of mining on the groundwater regime is discussed, comparing groundwater recharge estimates obtained using the water balance method (299±72 mm year⁻¹) and the stream hydrograph method (192±30 mm year⁻¹).      

城郊煤矿2201工作面底板改造技术

根据矿井水文地质、构造特征、工作面回采时突水规律,应用工作面底板改造技术,成功地对2201工作面40～70m段底板进行改造,效果显著。     

汤家坪钼矿环境地质评价

汤家坪钼矿位于河南省商城县南部,查明(332) (333)类钼金属量20多万吨,是大别山北侧首个大型金属矿床.汤家坪钼矿的勘探、开发及科研不仅具有巨大的经济效益和深远的社会意义,而且对大别造山带成矿理论研究具有重要的学术价值,对大别山造山带北侧寻找大型金属矿床具有一定的参考作用.     

The source and heating mechanism for the Ahram, Mirahmad and Garu thermal springs, Zagros Mountains, Iran

The Ahram, Mirahmad and Garu low-temperature geothermal springs in the Zagros Mountains, Boshehr Province, Iran, emerge along the Ghatar-Kazeroon fault. The average temperature of the springs is about 40 °C and the waters have appreciable amounts of dissolved solids and hydrogen sulfide. Based on chemical analyses, including stable isotopes of the thermal waters and data interpretations, and on a comparison with fresh water springs and wells in the study area, we conclude that the hot waters are of meteoric origin. Because of the prevailing geothermal gradient, the waters are heated as they circulate deep in the system through joints, fractures and the Ghatar-Kazeroon fault. During their deep circulation, the waters come into contact with Hormoz Series evaporites and the oilfield brines, resulting in an increase in dissolved ion concentrations.     

水文地质勘探中抽水试验技术分析

当前我国的资源总量紧张,面对可持续发展带来的挑战,加强水文地质勘探显得十分关键,而抽水试验技术则是这项工作展开的有效方法,对于后续的水文地质勘探工作质量和效率提升具有重要促进作用.通过对水文地质勘探的抽水试验技术展开探究,把握技术要点,针对其中存在的问题多角度论述,提出合理的措施推动技术改进,为水文地质勘探工作质量提升...