共查询到20条相似文献，搜索用时 31 毫秒
1.
西岭金矿床位于三山岛金矿床深部,是目前我国勘查深度最大的矿床,随着矿床勘探开发深入,已有评价结果已无法满足深部矿体勘探开发要求。本文通过三侧向电阻率、密度和声波测井成果,结合钻孔工程地质编录、岩石物理力学性质样品测试,研究矿床深部工程地质条件。通过自然电位、三侧向电阻率和井径测井成果,结合钻孔水文地质工程地质编录,研究矿床水文地质条件。应用井温、自然伽马测井技术,结合深井实验室资料,研究矿床开采可能引起的热害、放射性伤害及冲击地压与岩爆等井下灾害等环境地质条件。总结了矿床深部的开采技术条件变化规律,为深井开采和热防护工程提供可靠的技术参数和技术指导。 相似文献
2.
Large-scale rock landslides have huge impacts on various large-scale rock engineering and project operations. They are also important aspects evaluating geological disasters. In the initial evaluations on the stability of large-scale rock landslides, in most cases, it is difficult to conduct evaluation or to have accurate evaluations because most of large-scale rock landslides are huge in size, high in slopes, and located in the canyon of mountains, which makes the exploration very difficult and thus hard to get credible data on slip surface form, location, depth and strength. This paper describes the Badi landslide happened along the Lancang River, and systematically introduces methods to analyze and verify large-scale slip surface form using terrain conditions surrounding the large-scale landslide, shape of the slide walls, and development patterns of streams and gully. This paper also introduces ways to obtain strength parameters of slip surface with the soil in the slide zone by using the principles of stress state, principles of gravity compaction, structure regeneration and strength regeneration. It is confirmed that analyzed results to the slip surface are basically consistent with the exploration results. The methods introduced here have been successfully applied to evaluate the stability of Badi large-scale rock landslide and have been applied in engineering practices. 相似文献
3.
4.
5.
该文以中国南方一厚碳酸盐岩覆盖区的RVSP三维地震勘探实例,对RVSP三维地震勘探观测系统和数据采集参数的确定、地面等效处理和波场分离等关键处理技术及地质效果进行了阐述和分析,说明了RVSP在克服表浅层复杂地质条件及环境条件对资料的影响及提高地震资料的分辨率有其特定的优势,同时也提出了RVSP三维地震在采集和处理过程中的难点。 相似文献
6.
该文以中国南方一厚碳酸盐岩覆盖区的RVSP三维地震勘探实例,对RVSP三维地震勘探观测系统和数据采集参数的确定、地面等效处理和波场分离等关键处理技术及地质效果进行了阐述和分析,说明了RVSP在克服表浅层复杂地质条件及环境条件对资料的影响及提高地震资料的分辨率有其特定的优势,同时也提出了RVSP三维地震在采集和处理过程中的难点。 相似文献
7.
泌阳凹陷和南阳凹陷均属于南襄盆地次级构造单元，两者被唐河低凸起分隔，有效勘探面积相近，但凹陷资源量、已探明地质储量、石油天然气产量差异很大，油气分布具不均衡性。以两个凹陷的地震、钻井、测录井、地球化学资料为基础，立足于已有的勘探地质认识，从大地构造、含油气盆地要素分析、石油地质学的角度深入分析了两凹陷的相似性和差异性。研究结果表明，两凹陷在大地构造背景、构造演化阶段、凹陷平面形态、地层系统等方面具相似性。两凹陷的差异性主要表现在基底性质、边界断裂特征、沉降特征、地温特征、烃源岩特征、沉积体系、储集层物性、生储盖配置、圈闭特征、油气成藏期次及成藏模式10个方面。其中，基底性质和凹陷地质结构差异导致的油气成藏要素和成藏作用不同是油气分布不均衡性的决定因素。油气地质特征类比表明，南阳凹陷勘探程度相对较低，只要借鉴泌阳凹陷的成功勘探经验，创新地质认识，配套勘探关键技术，开展多领域、多层次、多油藏类型的立体勘探，仍具有较大的勘探潜力。 相似文献
8.
基于GIS的略阳县地质环境质量评价 总被引：11，自引：4，他引：7
基于地理信息系统(GIS)和多级模糊模式识别模型,建立了略阳县空间数据库和地质环境质量评价模型;综合考虑地形坡度、工程地质岩组、岩土体结构类型、地下水位、植被发育情况、月平均降雨量、人类工程活动强度等因素,用层次分析法确定各指标权值,应用评价模型对略阳县地质环境质量进行了综合评价,把略阳县地质环境划分为优、良、中、差4个质量级别。 相似文献
9.
10.
Ricardo OLIVEIRA 《山地科学学报》2011,8(2):296-306
The safety of large structures requires adequate foundations, which implies a good knowledge of the geological and geotechnical conditions of the respective ground. In general, that is only possible through engineering geological studies which include proper site investigation techniques, adapted to the nature of the ground (rock mass or soil) and to the associated engineering problems. The paper illustrates the studies carried out for the design of the foundations of Ribeiradio 76 m high concrete gravity dam in a difficult rock mass and of Vasco da Gama Bridge, 13 km long, crossing the Tagus River in Lisbon, Portugal, through piles 75 m deep. 相似文献
11.
12.
13.
Investigation of fractured rock aquifer in South China using electrical resistivity tomography and self-potential methods 总被引：1，自引：0，他引：1
Assessment of fractured rock aquifers in many parts of the world is complicated given their strong heterogeneity. Delineation of the subsurface geological formation in the weathered terrain is essential for groundwater exploration. To achieve this goal, 2D electrical resistivity tomography(ERT) and self-potential(SP) in combination with joint profile method(JPM) and boreholes have been carried out to delineate the subsurface geological units, detect the fracture/fault zones in hard rock, monitor the groundwater flow, and estimate the groundwater reserves contained within the weathered terrain at a complex heterogeneous site of Huangbu, South Guangdong of China. The integration of resistivity images with the borehole lithology along three profiles delineates three subsurface distinct layers namely topsoil cover, weathered and unweathered layers. The incorporation of ERT and SP with JPM reveal five fractures/faults, i.e., F_1, F_2, F_3, F_4 and F_5. 2D ERT models interpret the less resistive anomalies as the fractures/faults zones, and high resistive anomalies as the fresh bedrock. The inversion program based on the smoothness-constraint is used on the resistivity field data to get more realistic three layered model. SP measurements are obtained along the same electrical profiles which provide the negative anomalies clearly indicating the groundwater preferential flow pathways along the fracture/fault zones. Hydraulic parameters namely hydraulic conductivity and transmissivity were determined to estimate the groundwater resources contained within the fractures/faults. The integrated results suggest that the fractures/faults zones are most appropriate places of drilling for groundwater exploration in the investigated area. Geophysical methods coupled with the upfront borehole data provides better understanding about the conceptual model of the subsurface geological formations. The current investigation demonstrates the importance of the integrated geophysical methods as a complementary approach for groundwater assessment in the hard rock weathered areas. 相似文献
14.
15.
夏日哈木镍钴矿为大型镍钴硫化物矿床,现拟建大型露天采场,边坡采用分台阶式高边坡,最高边坡高度超过600m。该工程具有开挖成本高,边坡一但失稳后果严重的特点。为此需要选择一个即节约经济成本又保障整体边坡稳定的最佳边坡角。本文采取Geostudio软件中的Slope模块极限平衡方法对拟建露天采场假设开挖边坡角的整体边坡稳定性进行分析,提出最佳设计边坡角。 本次边坡角优化的思路：首先根据场地工程地质条件和拟建边坡的高度等因素将拟建边坡划分为5个区,选择典型边坡工程地质剖面并进行工程地质岩体分段,然后通过岩石强度指标折减计算（本文采用费辛柯法、M.Georgi法和经验法）给各分段的岩体赋予凝聚力、内摩擦角等计算参数,采用极限平衡方法（Geostudio软件中的Slope模块法）对不同角度下对各分区边坡的破坏形式及安全系数进行计算,最后提出了各分区边坡的最佳设计边坡角。 相似文献
16.
17.
2019年8月,济南市南部山区水井北村发生滑坡地质灾害。根据水井北村滑坡的地质背景,针对性布置物探、钻探等勘查手段,研究滑坡工程地质特征,分析水井北村滑坡类型及发生的地质成因机制;采用刚体极限平衡分析法,研究水井北村滑坡整体稳定性。研究认为断裂发育、岩层风化、地势、浅层含水层受降雨影响,是水井北村地质灾害点具备滑坡发生的内在条件。降雨和泉水入渗、耕植等行为是滑坡发生的外在条件。水井北村山体滑坡在天然条件下,稳定系数平均值为1.033,整体属欠稳定状态。暴雨状态下,稳定系数平均值为0.903,坡体处于不稳定状态。 相似文献
18.
Xiangyu REN Li CHEN Hong FENG Xinli LI 《东北亚地学研究》2006,9(2):235-238
The stability analysis is one of the chief problems at hydropower stations.The Tengzigou Hydropower Station is a significant project in Southwest China.The authors analyzed the engineering geological features and evaluated the stability of rock mass on left bank.For determining the parameters of rock mass stability on left bank,we adopted the method of numerical value calculation according to the theory of rigidity limited equilibrium,which will provide the theoretical evidences for this project. 相似文献
19.
The stability analysis is one of the chief problems at hydropower stations. The Tengzigou Hydropower Station is a significant project in Southwest China. The authors analyzed the engineering geological features and evaluated the stability of rock mass on left bank. For determining the parameters of rock mass stability on left bank, we adopted the method of numerical value calculation according to the theory of rigidity limited equilibrium, which will provide the theoretical evidences for this project. 相似文献
20.
王建平 《地球信息科学学报》2007,9(6):111-115
近矿围岩蚀变和构造分析是找矿研究的重要内容,遥感异常信息提取、遥感地质解译,结合野外调查能查明围岩蚀变分布情况和构造特征。本文以河南省卢氏县西部地区的成矿远景区为研究区域,选用ASTER多光谱数据和SPOT5高分辨率数据,利用遥感图像波段比值处理方法及特征主组分分析、光谱角填图分类等分析方法,对该地区重要成矿区段做矿化蚀变信息提取及遥感地质综合分析并提供了新的找矿靶区。 相似文献