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1.
In 1977, Taylor proposed a constant elasticity model relating capacity choice in mines to reserves. A test of this model using a very large (n = 1,195) dataset confirms its validity but obtains significantly different estimated values for the model coefficients. Capacity is somewhat inelastic with respect to reserves, with an elasticity of 0.65 estimated for open-pit plus block-cave underground mines and 0.56 for all other underground mines. These new estimates should be useful for capacity determinations as scoping studies and as a starting point for feasibility studies. The results are robust over a wide range of deposit types, deposit sizes, and time, consistent with physical constraints on mine capacity that are largely independent of technology.  相似文献   

2.
非金属矿是四川优势矿产资源 ,主要矿种齐全、储量丰富 ,建材资源、化工原料资源优势突出 ,常用矿产与优势矿产吻合程度高 ;区域特征明显 ,集中分布 ,适于综合开发。但仍存在加工程度低、综合利用差、资源浪费严重 ,污染环境等问题。在综合分析矿产资源及其开发特点与评价的基础上 ,围绕加快发展建材、化工 (特别是新型建材 )主导产业 ,构想了 2 1世纪四川非金属矿开发利用的战略指导思想、目标、重点、布局及对策。  相似文献   

3.
灰色关联法和德尔菲法是对系统中各因子的价值或贡献率进行评估的有效方法.土壤侵蚀敏感性的评价涉及自然界诸多因素,包括定性因素和定量因素,因此采用灰色关联法和德尔菲法进行土壤侵蚀敏感性评价将提高评价的效率和准确性.金沙江流域从上游到下游地理环境差异大,采用灰色关联法和德尔菲法对不同地理环境下的露天矿区进行土壤侵蚀敏感性评价,有助于流域的生态环境保护与治理.分别在该流域（云南部分）高山峡谷区、宽谷湖盆区、喀斯特中山丘陵区等3种地理环境下选取3个典型露天矿区为研究对象,以土壤质地、地形起伏度、坡度、植被覆盖度、植被类型、降水等6个因子作为评价指标,采用灰色关联度法、德尔菲法,在GIS软件平台下对3个典型露天矿区进行了土壤侵蚀敏感性评价,得出了3个典型露天矿区的土壤侵蚀敏感性.实践证明,两种方法与GIS相结合是实现土壤侵蚀敏感性评价的有效工具.  相似文献   

4.
基于D-InSAR的煤矿区开采沉陷遥感监测技术分析   总被引：10，自引：0，他引：10  
该文在综合分析国内外开采沉陷监测技术现状、合成孔径雷达干涉测量(InSAR)和差分干涉测量(D-In SAR)技术发展及其在地表沉陷监测中应用成果的基础上,分析了D-InSAR技术在煤矿开采沉陷变形监测中的特点与技术优势。指出:应用D-InSAR进行煤矿区开采沉陷监测的具体目标是矿区地表沉降演变过程分析、采区地表沉陷动态监测与分析和矿区DEM数据更新;亟须研究解决的关键技术问题有:源数据获取与选择、数据处理方法、地面配合措施、精度与可靠性评价、多源信息集成分析等。D-InSAR为煤矿区地表时空演变过程研究和开采沉陷实时动态监测提供了新的技术方法;作为"数字矿山"的重要内容,D-InSAR可以有效地指导矿区生产、整体规划与长远发展,并为矿区可持续发展服务。  相似文献   

5.
根据目前对青藏高原第四系及古环境研究的最新进展,提出了西藏地区盐湖成盐的模式———古大湖成盐模式,并列举了诸多具有说服力的证据,为研究盐湖矿产形成规律和进一步开发利用,促进西藏经济发展,将产生积极的影响。  相似文献   

6.
Natural Resources Research - Tailings from porphyry copper mines contain environmentally harmful amounts of elements such as copper, molybdenum, lead and cobalt. Geostatistical simulation of...  相似文献   

7.
Natural Resources Research - Blast-induced ground vibration (GV) is a hazardous phenomenon in open-pit mines, and it has unquestionable effects, such as slope instability, deformation of...  相似文献   

8.
利用矿业软件Surpac,收集矿山在开采过程中的生产勘探数据和南矿段补勘所采集的钻孔资料,更新了地质数据库;对乌山铜钼矿矿床模型进行了优化研究;为边际品位指标优化提供了地质资源基础;同时也作为储量估算和境界圈定的依据。  相似文献   

9.
本文对广西锰矿区、铅锌矿区和金矿区土壤和植物的重金属含量进行了调查分析。在所调查的24种植物中,Cu含量在30.8~183.8mg/kg范围,Mn含量在143.6~27514mg/kg范围,Zn含量在113.3~1773mg/kg范围。相对于正常条件下生长的普通植物来说,其Cu、Mn和Zn含量都较高。生长在锰矿区的狗牙根、香附子和菜蕨中Mn的含量分别达到27514、16144和11516mg/kg,相应的富集系数为11.4、6.7和4.8。这3种植物均达到Mn超富集植物的相关标准,因此是潜在的Mn超富集植物。  相似文献   

10.
采矿迹地景观生态重建的理论与实践   总被引：26，自引：1，他引：26  
本文以淮北市和铜山县煤矿塌陷地为例，研究了采矿迹地的景观变迁；并探讨了如何应用景观生态学的理论来进行采矿迹地的景观生态重建。  相似文献   

11.
Cheng  Zhiheng  Liu  Biao  Zou  Quanle  Wang  Xin  Feng  Jicheng  Zhao  Zhiyan  Sun  Fulong 《Natural Resources Research》2020,29(3):1601-1615
Natural Resources Research - Mining-induced fracture plays a key role in gas drainage for gas burst-prone underground coal mines, especially for closely multilayered coal seams. The layout and...  相似文献   

12.
Natural Resources Research - Drilling and blasting operations are one of the most effective techniques for rock removal in mines. However, these operations are associated with some environmental...  相似文献   

13.
Natural Resources Research - Blasting is the most popular method for rock fragmentation in open-pit mines. However, the side effects caused by blasting operations include ground vibration, air...  相似文献   

14.
Natural Resources Research - This study aimed to develop and assess the feasibility of different machine learning algorithms for predicting ore production in open-pit mines based on a truck-haulage...  相似文献   

15.
Natural Resources Research - Rock properties are useful for safe operation and design of both surface and underground mines including civil engineering projects. However, the cost and time required...  相似文献   

16.
Yu  Zhi  Shi  Xiuzhi  Zhou  Jian  Gou  Yonggang  Rao  Dijun  Huo  Xiaofeng 《Natural Resources Research》2021,30(6):4063-4078
Natural Resources Research - In the process of open-pit bench blasting for many mines, rock fragments move in the direction of loose space after fragmentation under explosive energy, leading to ore...  相似文献   

17.
One of the prospective methods of coal utilization, especially in case of coal resources which are not mineable by means of conventional methods, is underground coal gasification (UCG). This technology allows recovery of coal energy “in situ” and thus avoid the health and safety risks related to people which are inseparable from traditional coal extraction techniques. In Poland most mining areas are characterized by numerous coal beds where extraction was ceased on account of technical and economic reasons or safety issues. This article presents estimates of Polish hard coal resources, broken down into individual mines, that can constitute the basis of raw materials for the gasification process. Five mines, representing more than 4 thousand tons, appear to be UCG candidates.  相似文献   

18.
Although journal editing is central to scholarly enterprise, helping to maintain academic standards and shape disciplines, it is frequently discouraged within the academic assemblages that depend on it. Following recent contributions by geographers to discussions on academic service such as book editing and reviewing, this article explores some ironies and paradoxes of journal editing. It first discusses the challenges of journal editing as well as its problematic place in “academic capitalism.” It then examines professional and personal rewards of journal editing. Despite strong disincentives, journal editing offers valuable opportunities for self-development and deepening professional networks, as well as for refining the discipline.  相似文献   

19.
以湖北省鄂州程潮铁矿和黄石大冶铁矿为例,利用GIS空间分析功能对研究区数据进行提取分级、赋值统计及归一化等处理,构建了包括高程、坡度、地层、地下开采点的分布密度、相距最近地下开采点的距离、开采厚度与深度比值、蚀变接触带缓冲区、地下水深度以及地表地物类型的矿区采空塌陷易发性评价指标数据集;借助IDL语言调用Matlab神经网络工具箱,将研究区2011和2012年的指标数据集作为输入数据,塌陷易发性作为期望输出,建立基于BP神经网络的矿区采空塌陷易发性预测模型;通过选取并优化训练样本,实现对2013年矿山塌陷易发性的预测。结果表明,高易发区及以上的区域包含89.91%的采空塌陷,随着易发等级的提高,采空塌陷面积占易发等级面积比也随之增大;采空塌陷的分布具有明显的地带性,高易发区基本沿着岩体与围岩的接触带分布。模型解决了塌陷预测中的非线性映射问题,预测结果与实际调查情况基本吻合。BP神经网络模型与GIS技术相结合预测矿区采空塌陷的易发性具有可行性。  相似文献   

20.
Natural Resources Research - Dynamic hazard and coal spontaneous combustion are major potential safety hazards in coal mines with enriched gas and spontaneously inflammable property. However, the...  相似文献   

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