地籍测量中的RTK技术和其它技术

RTK技术是GPS发展的最新技术 ,已经开始应用于测量的很多方面。主要论述了GPSRTK在地籍测量中的相关技术 ,并且将其与地籍测量中的其他技术进行了一些比较 ,提出了将GPSRTK与全站仪结合进行地籍测量的基本观点。     

渭河河谷甘肃段水资源承载能力分析

本文在论述渭河河谷甘肃段水资源分布特点及现状利用量和承载量的基础上,分析了水资源的承栽能力,认为区内水资源最佳承载量是355万人,355亿元工业产值和248.5万亩的可灌高效农田.据此提出了城市发展规模的大小,目的是供地方政府规划参考.     

古交矿区8号煤的实验室热解脱硫

介绍了古交矿区8号煤在不加催化剂和加催化剂两种条件下的实验室热解脱硫试验情况．结果表明，在不加催化剂时，升温速度为5～10℃／min脱硫效果最好，脱硫率大于40％；当在原煤中添加催化剂AlCl3和NH4Cl时，有较好的脱硫作用，焦炭中灰分也没有明显提高，而当添加催化剂CuCl2和CaO时，不能脱除煤中硫。并据此提出了建议脱硫方案。     

一种新型自动开槽机及其控制

针对棒、管料开槽的问题，提出了一种新型全自动开槽机。介绍了该开槽机的结构和工作原理，建立全自动开槽机相适应的液压系统，搭建了开槽机继电器——控制器控制电路，实现了该设备的全自动过程控制。     

高产高效综放工作面顶板水综合防治

通 过 对 T2195工 作 面 顶板 涌 水 水 质化 验 、周 边 开 采 情 况 的 综 合 分 析 认 为:T2195工 作 面 涌 水 以 5煤 层 顶 板 水为 主,地面 注 浆水 只是 起 了间 接补 给 作用 。为 此提 出 继续 进行 地 面注 浆、进一 步 完善 井下 排 水系 统等 有 针对 性的 防 治水 措施 ,确 保 工作 面的 高 产高 效。     

杭州湾大桥岩土工程勘察

文章对杭州湾大桥的勘察工作进行了全面的回顾，并对杭州湾地区地质结构作概略的介绍。     

城市利用地下咸水节省淡水资源

开发地下咸水,用于城市居民生活,可节省58%淡水资源.还可腾出地下库容,增大降雨入渗,淡化地下咸水,改善生态环境.     

Horizontal crustal movement in Chinese mainland from 1999 to 2001

The paper introduces the horizontal crustal movement obtained from GPS observations in the regional networks (including the basic network and the fiducial network) of the Crustal Movement Observation Network of China (CMONOC) carried out in 1999 and 2001. This paper is characterized by the acquisition of the horizontal displacement velocities during the period from 1999 to 2001 at the observation stations in the regional networks with datum definition of a group of stable stations with small mutual displacements in east China. Based on the most detailed map of horizontal crustal movement in Chinese mainland, the division of blocks, their displacements and deformations are studied. An approach to analysis of the intensity of the horizontal crustal deformation is proposed. The general characteristics of the recent horizontal crustal movement in Chinese mainland and that before the Kunlunshan earthquake of M=8.1 on November 14, 2001 are analyzed. Foundation item: The National Development and Programming Project for Key Basic Research (95-13-03-07).     

Depositional sequence architecture and filling response model of the Cretaceous in the Kuqa depression, the Tarim basin

The Cretaceous system of the Kuqa depression is a regional scale (second order) depositional sequence defined by parallel unconformities or minor angular unconformities. It can be divided into four third-order sequence sets, eleven third-order sequences and tens of fourth- and fifth-order sequences. It consists generally of a regional depositional cycle from transgression to regression and is composed of three sets of facies associations: alluvial-fluvial, braided river-deltaic and lacustrine-deltaic facies associations. They represent the lowstand, transgressive and highstand facies tracts within the second-order sequence. The tectonic subsidence curve reconstructed by backstripping technique revealed that the Cretaceous Kuqa depression underwent a subsidence history from early accelerated subsidence, middle rapid subsidence and final slower subsidence phases during the Cretaceous time, with the correspondent tectonic subsidence rates being 30-35 m/Ma, 40-45 m/Ma and 5-10 m/Ma obtained from northern foredeep. This is likely attributed to the foreland dynamic process from early thrust flexural subsidence to late stress relaxation and erosion rebound uplift. The entire sedimentary history and the development of the three facies tracts are a response to the basin subsidence process. The slower subsidence foreland gentle slope was a favorable setting for the formation of braided fluvial deltaic systems during the late period of the Cretaceous, which comprise the important sandstone reservoirs in the depression. Sediment records of impermanent marine transgression were discovered in the Cretaceous and the major marine horizons are correctable to the highstands of the global sea level during the period.     

Geophysical exploration for interlayer slip breccia gold deposits: example from Pengjiakuang gold deposit, Shandong Province, China

Interlayer slipping breccia‐type gold deposit – a new type of gold deposit, defined recently in the northern margin of the Jiaolai Basin, Shandong Province, China – occurs in interlayer slip faults distributed along the basin margin. It has the features of large orebody thickness (ranging from 14 m to 46 m, with an average thickness of 30 m), shallow embedding (0–50 m thickness of cover), low tenor of gold ore (ranging from 3 g/t to 5 g/t), easy mining and ore dressing. This type of gold deposit has promising metallogenic forecasting and potential for economic exploitation. A ground gamma‐ray survey in the Pengjiakuang gold‐ore district indicates that the potassium/thorium ratio is closely related to the mineralization intensity, i.e. the larger the potassium/thorium ratio, the higher the mineralization. The gold mineralized alteration zone was defined by a potassium/thorium ratio of 0.35. A seismic survey confirms the location of the top and bottom boundaries and images various features within the Pengjiakuang gold mineralization belt. The gold‐bearing shovel slipped belt dips to the south at an angle of 50–55° at the surface and 15–20° at depth. The seismic profile is interpreted in terms of a structural band on the seismic section characterized by a three‐layered model. The upper layer is represented by weakly discontinuous reflections that represent the overlying conglomerates. A zone of stronger reflections representing the interlayer slip fault (gold‐bearing mineralized zone) is imaged within the middle of the section, while the strongest reflections are in the lower part of the section and represent metamorphic rocks at depth. At the same time, the seismic reflection survey confirms the existence of a granite body at depth, indicating that ore‐forming fluids may be related to the granite. A CSAMT survey showed that the gold‐bearing mineralized zone is a conductive layer and contains a low‐resistivity anomaly ranging from 2 Ωm to 200 Ωm.