黄淮地区巨厚松散层岩性结构特征以及采矿对其水动态的影响   总被引：2，自引：0，他引：2  

许延春  耿德庸 《工程地质学报》1998,6(3):211-216

本文选择地处黄淮地区的淮南、淮北、大屯、兖州和邢台等矿区中典型矿井的巨厚松散层,分析了该地区巨厚松散层的岩性结构特征,从水体、地层和采矿波及类型等方面论述了采矿对松散层地下水动态的影响特征,解释和解决了某些实际工程问题。  相似文献   

Using logistic regression to merge mineral resource databases     

Deborah J. Shields  Stella W. Todd 《Natural Resources Research》1998,7(1):53-61

The purpose of this project was to develop and test a methodology for determining the likelihood that mineral resource location records from two nationwide mineral resource information databases represent the same site. The long-term goal is to create a comprehensive database by merging the Mineral Resource Data System (MRDS) of the U.S. Geological Survey, and the Mineral Availability System/Mineral Industry Location System (MAS/MILS) of the U.S. Bureau of Mines (now part of the Geological Survey). Part of that process involves linking records for the same site from each database. Match probabilities were estimated using a logistic regression of mineral resource location attributes, derived from known matched (cross-referenced) and known unmatched randomly sampled mineral site pairs from within the conterminous United States (n=10,000). Model accuracy was assessed using a randomly sampled test dataset, not used in logistic model development (n=4,000). Probability distributions were similar between the development and test datasets. The overall agreement beyond chance was good for the test data set using the kappa statistic. Classification accuracy was 89.6% for known matched site pairs and 84.0% for known unmatched site pairs based on a probability threshold of 0.50 for a match. Distributions of attributes were similar between the development and test datasets. This classification method is a viable approach for estimating match probabilities between database records.  相似文献   

三山岛金矿海边地下开采矿山稳定性的数值模拟分析   总被引：1，自引：0，他引：1  

刘竹华  杨家录 《工程地质学报》1996,4(2):24-30

本文用数值模拟的分析方法, 评价了三山岛金矿地下开采引起的开采效应及地表下沉盆地的变形特征。结果表明, 矿山地表是稳定的, 上部一期工程开采引起的地表最大下沉量不超过700mm, 深部开挖时不超过995mm左右；在采场充填的情况下, 地表下沉值将降低55%左右；由于矿山地表变形较小, 加之覆盖层第四纪中存在着两层总厚度8～12m的隔水粘水层, 因此不致沟通地表水与井下的直接联系而危及矿山的安全。  相似文献   

吉林省珲春市黄松甸子砾岩型金矿床开采技术条件     

崔奎 《吉林地质》1996,15(1):76-82

本文重点论述吉林省珲春市黄松甸子砾岩型金矿床工程地质特征及基类型的划分，对矿床的工程地质条件给予定性和半定量评价，论述了矿床的开采技术条件。  相似文献   

Air quality and view degradations due to copper mining and milling: Preliminary analysis and cost estimates for Green Valley,Arizona     

Hyo-Sun Kim  Dr. DeVerle Harris 《Natural Resources Research》1996,5(2):91-102

Green Valley, Arizona is a retirement community located near major open-pit copper mines. Mining and milling activities create dust, which degrades air quality, and mine dumps and tailings banks, which degrade the viewscape. Although the tailings banks are highly visible, this study found that consumer surplus lost from dust-polluted air is more than twice that from degradation of viewscape. Consumer surplus lost from both air quality and viewscape degradation is estimated to be between $116,000,000 and $169,000,000. These preliminary estimates are based upon two studies: hedonic property values, and a contingent valuation survey of willingness to pay.  相似文献   

The investment-worth model: Concepts and methods for estimation of model parameters     

William P. Blacutt 《Natural Resources Research》1995,4(3):262-272

A holistic investiment methodology defined as the investiment-worth model is developed to evaluate the risks and rewards of capital investments. The model demonstrates that the investment worth of a mining project is not the same for all firms in the industry. The attractiveness of a project varies with economic and risk-related characteristics of a firm.  相似文献   

湖南利民煤矿煤与瓦斯突出量级程度划分及其应用研究     

曹运江  黄润秋  冯涛  汪禄生  刘新华 《地球科学进展》2004,(Z1)

根据煤与瓦斯突出的地质条件,对煤岩体系中的弹性潜能、瓦斯内能、采场附加应力积聚的能量分别进行了定性的划分,并结合弹性潜能、瓦斯内能,对煤与瓦斯突出的量级程度也尝试性地首次做出分类,并提高了原来的下限指标。对典型突出模式进行了简要地分析,为今后开展防治利民矿井煤与瓦斯突出工作提供了新的思路与对策。  相似文献   

小浪底水库蓄水运行对矿井水害防治的影响评价   总被引：4，自引：0，他引：4  

王志荣  刘庆军  牛书安 《水文地质工程地质》2003,30(5):61-65

新安煤矿系我国大水矿区,地下水害严重威胁着矿井的安全生产。本文根据大量原始资料,运用灰色系统理论和风险分析理论,讨论了小浪底水库蓄水运行对新安煤矿水害防治所造成的影响,明确指出水库蓄水后矿井突水威胁主要来自断层水及石炭系太原群L7～8岩溶水;煤矿防治水的重点应该是治理L7～8灰岩及矿区边界断层在库区的露头或隐伏露头。  相似文献   

凹凸棒石粘土开发利用现状、思考与前瞻——以江苏盱眙凹凸棒石粘土开发为例   总被引：7，自引：1，他引：7  

詹庚申  郑茂松  高振如  朱士鹏 《江苏地质》2003,27(1):41-47

凹凸棒石粘土是一种自然界比较稀少、性能独特、用途广泛的非金属矿产，在我国主要分布在江苏西部的盱眙－六合和安徽的明光地区。通过叙述国内外凹凸棒石粘土开发利用的现状，回顾我国凹凸棒石粘土开发的过程，重点介绍了盱眙从保护资源和环境着手，整顿、规范矿业市场，从而建设苏北凹凸棒石粘土支柱性企业的做法，对如何从开发思路、科技引导和创新、借鉴经验、人才使用和成果转化等方面提高认识，促进我国凹凸棒石粘土工业向深度和广度发展，进行了比较深入的思考。  相似文献   

数字矿区的建设构想   总被引：1，自引：0，他引：1  

肖寒  宋金玲 《江苏地质》2003,27(4):225-228

伴随着新世纪和“数字地球”时代到来，数字省区、数字城市等工程已经启动，数字矿区的建设也因此提上日程。根据我国矿区现状，从区域融合和可持续发展结合的角度，诠释了矿区概念，对数字矿区建设的必要性及可行性进行探讨，给出了数字矿区建设的思路和框架。  相似文献