传统矿产资源储量估算软件实现中的夹石及采空区快速扣除方法

合理扣除矿体块段空间范围内的夹石、小块段、采空区是获取真实资源储量的前提.根据我国传统矿产资源储量估算方法的特点,提出了一种新的基于空间关系的计算机辅助夹石、小块段、采空区快速扣除的方法;并根据该方法实现了QuantyMine矿产资源勘查与开发软件中的垂直剖面法矿产资源储量估算子系统.经实际矿山应用对比,该系统可有效地解决围岩夹石、小块段、采空区扣除等复杂问题,为用户提供一个基于传统方法的矿产资源储量动态估算与管理平台.     

西秦岭寨上金矿综合地球物理研究

寨上金矿是中国西秦岭构造带内一个重要的超大规模卡林—类卡林型金矿床.以往对该金矿床的研究主要集中在矿床学、年代学和成矿特征等方面,缺乏地球物理工作的系统梳理.本文以贯穿研究区的可控源音频大地电磁测深及激电工作为主体研究寨上金矿的深部结构,结合地质资料建立了矿区典型地质—地球物理解释模型,探讨成矿机制,总结寨上金矿赋矿标...     

Morphology of lake Waikaremoana,New Zealand,and reconnaissance of its benthic fauna

As shown by an extensive echo‐sounding survey, the morphology of Lake Waikaremoana is a drowned valley system; complex troughs and banks at the eastern end are consistent with infilling and damming by slip material. In September 1972, water temperatures were near isothermal (surface‐bottom, 9.3–8.8°c), and clarity measured by secchi disc averaged 12.2 m. Very fine‐grained clayey silts occur on the surface of sediments throughout the lake.

Five benthic dredging stations yielded ten groups of organisms; of these, oligocheates and gasteropods (Potamopyrgus antipodarum only) occurred most widely, to the greatest depths (248 m), and in the greatest numbers. Animals in the eight remaining groups were few and limited to shallower depths.     

煤矿积水采空区瞬变电磁法探测的附加效应

煤矿积水采空区由于其复杂性,在进行瞬变电磁法探测时,常常会产生一些附加效应。从理论、试验出发,研究了附加效应的特点及探测曲线特征,并根据这些特点对实际工程进行了分析、解释,圈定的积水采空区经钻探验证,效果良好。      

辽宁省瓦房店市华铜矿矿山地质灾害治理方案概述

华铜矿矿山主要有尾矿坝、海水入侵、地面塌陷、矿井突水、滑坡、围岩大变形冒顶等地质灾害.通过矿山现状地质灾害类型及其危险性分级、地质灾害勘查技术方法介绍,对地质灾害的成因和预测做了概括性分析,提出了可操作的、有效的地质灾害治理方案,认为矿山环境恢复工程具有显著的社会效益和经济效益.因该矿山地质灾害的复杂性,建议治理项目应分阶段逐步完成.     

宁夏大峰矿5500t爆破及观测研究

2007年底在宁夏和内蒙古交界的贺兰山大峰煤矿进行了5500t的大当量工业爆破,这是一次进行地球物理、工程抗震等研究的难得机会,同时也是全面检测宁夏及邻区“十五”新建测震及前兆系统运行情况及工作状况的机会。除了加强固定测震台网的监测外,宁夏回族自治区地震局还联合甘肃,四川,青海4省地震局布设了南北向的临时测线。北京大学,中国地震局地球物理勘探中心及爆破单位等十余家单位,分别在不同地点沿不同方向布置了不同研究目的的测线。本文就此次爆破和观测情况做简要介绍。     

Calibration of a hysteretic model for glass fiber reinforced gypsum wall panels

Glass fi ber reinforced gypsum(GFRG) wall panels are prefabricated panels with hollow cores, originally developed in Australia and subsequently adopted by India and China for use in buildings. This paper discusses identifi cation and calibration of a suitable hysteretic model for GFRG wall panels fi lled with reinforced concrete. As considerable pinching was observed in the experimental results, a suitable hysteretic model with pinched hysteretic rule is used to conduct a series of quasi-static as inelastic hysteretic response analyses of GFRG panels with two different widths. The calibration of the pinching model parameters was carried out to approximately match the simulated and experimental responses up to 80% of the peak load in the post peak region. Interestingly, the same values of various parameters(energy dissipation and pinching related parameters) were obtained for all fi ve test specimens.     

Controls on migration and aggregation for tectonically sensitive elements in tectonically deformed coal: An example from the Haizi mine,Huaibei coalfield,China

Tectonically deformed coal(TDC)develops because of the superimposed deformation and metamorphism of a coal seam by tectonic movements.The migration and accumulation of trace elements in TDC is largely in response to stress-strain conditions.To develop a law governing the migration and aggregation of sensitive elements and investigate the geological controls on TDC,coal samples from different deformation sequences were collected from the Haizi mine,in the Huaibei coalfield in Anhui Province,China,and the concentrations of 49 elements were determined by XRF and ICP-MS,and then microscopically analyzed.The results show that the distribution and morphology of minerals in coal is related to the deformation degree of TDC.The evolutionary process runs from orderly distribution of minerals in a weak brittle deformed coal to disordered distributions in ductile deformed coal.According to the elemental distribution characteristics in TDC,four types of element migration can be identified:stable,aggregate,declining,and undulate types,which are closely related to the deformation degree of TDC.Present data indicate that the overall distribution of rare earth elements(REE)does not change with metamorphism and deformation,but it shows obvious dynamic differentiation phenomena along with the deformation of TDC.Tectonic action after coal-formation,brittle or ductile deformation,and the metamorphic mechanism and its accompanying dynamic thermal effects are the main factors that influence the redistribution of elements in TDC.We conclude that tectonic movements provide the motivation and basis for the redistribution of elements and the paths and modes of element migration are controlled by brittle and ductile deformation metamorphic processes.The dynamic thermal effect has the most significant effect on coal metamorphism and tectonic-stress-accelerated element migration and accumulation.These factors then induce the tectonic-dynamic differentiation phenomenon of element migration.     

张家口宣东矿辉绿岩床对煤层气赋存的影响

张家口宣东矿是一个高瓦斯矿井。为了查明矿井煤层气赋存规律及其变化原因,通过大量勘查钻孔及井巷揭露资料,深入研究了辉绿岩体侵入时代、产状特征及空间分布,分析了煤层煤质及煤层气变化规律,探讨了辉绿岩对煤层气的影响。结果表明:宣东矿辉绿岩以岩床形式侵入到侏罗纪下花园煤系中,导致本区异常古地热力场的形成,促使煤层发生区域热变质作用;煤的热演化变质作用是其发生二次生烃演化的直接原因,而这种生烃作用是影响本区煤层含气性的关键因素,它促进了煤层气的形成,且本区煤类及煤层气的分布特征与辉绿岩床的赋存特征很吻合;辉绿岩床形成良好的盖层,封闭了煤层气的逃逸通道,对煤层气的后期保护和富集提供了条件。      

基于COMSOL Multiphysics的三维地质建模方法

三维地质建模具有直观、形象、便捷等优点,在地质、矿产、地下施工等领域有着突出贡献。COMSOL Multiphysics作为多物理场耦合模拟仿真软件,具备一定的三维建模能力。通过充分挖掘该软件自身潜力,结合Kriging插值方法,尝试建立了山西某井田的三维地质模型。研究结果显示,基于COMSOL Multiphysics的三维地质建模方法可实现地质体模型的缩放、旋转和平移等操作,生成地质剖切面图、透视图,展示地质体内部的各个细节。实例证明了COMSOL Multiphysics软件的三维地质建模能力及其在地质解译、矿产评估和多物理场求解等方面的应用价值。