基于模糊综合评判法的地质构造复杂程度评价——以许厂煤矿330采区为例     

李小明  邵小朋  连会青 《中国煤炭地质》2019,(3):6-11

矿井地质构造是影响煤矿安全开采的首要地质因素。鉴于许厂煤矿330采区构造特征和发育规律不清,为合理安排生产和正确选择采掘方式,在分析整理现有采掘地质资料的基础上,按照400m×400 m把许厂煤矿330采区划分成44个单元,选取了断层密度、断层强度、平面褶皱强度指数、分维值四个定量评价指标,采用模糊综合评判法对3下煤层的构造复杂程度进行了分析评价。评价结果表明:属于Ⅰ类的有25个单元,Ⅱ类的有7个单元,Ⅲ类的有6个单元,Ⅳ类的有6个单元,开采实际揭露情况与评价结果基本一致,基于模糊综合评判法的地质构造复杂程度评价基本可靠,可为矿井的高效安全生产提供一定的指导依据。  相似文献   

深度边缘光谱U-Net海水网箱养殖信息提取     

柯丽娜  翟宇宁  范剑超 《海洋学报》2022,44(2):132-142

网箱养殖是海水养殖的重要类型之一,传统网箱养殖目标光谱特征受近岸植被、水体影响较大,易出现噪声问题.新型深海网箱养殖目标离岸较远,但养殖目标海面框体部分较小,与自然水体光谱相似性较高,难以实现有效提取.本文提出深度边缘光谱U-Net模型对两种海水网箱养殖类型进行养殖信息提取.该模型通过Canny算子双边滤波算法去除波段...  相似文献   

Radial velocity observations and physical activities of the contact binary system SW lacertae     

Disheng Zhai  Wenxian Lu 《Chinese Astronomy and Astrophysics》1989,13(4):350-359

We present our 1984 radial velocity observations of the W UNa system SW Lac. These give a new spectroscopic mass ratio q_sp = 1.255 ±0.011. A joint solution of the velocity and light curves give the following revised absolute parameters: M₁ = 0.78 M, M₂ = 0.96M, R₁ = 0.91R, and R₂ = 1.00 R. Based on our new results, together with a detailed review of the period changes, probable mass transfer, mass loss, spot activity and other physical properties of SW Lac are discussed.  相似文献   

Geochemistry of early Paleozoic alkali dyke swarms in south Qinling and its geological significance   总被引：3，自引：0，他引：3  

张成立  高山  张国伟  柳小明  于在平 《中国科学D辑(英文版)》2003,46(12):1292-1306

The abundant research achievements about Qinling orogeny going through central China were obtained in the last decade[1—3]. However, there is a debate about the early Paleozoic tectonic evolution of south Qinling. Thus, it is undoubted that the systemati…  相似文献   

Petrogenesis and significance of the Mesozoic North Taihang complex: Major and trace element evidence   总被引：22，自引：1，他引：21  

陈斌  翟明国  邵济安 《中国科学D辑(英文版)》2003,46(9):941-953

The intensive Mesozoic magmatism in the North China Craton (NCC) has drawn great attention for its particular geochemical signatures (e.g. high-K), petrogenesis and tectonic setting. The North Taihang complex represents the westernmost magmatic belt of th…  相似文献   

Ore-forming fluids associated with granite-hosted gold mineralization at the Sanshandao deposit, Jiaodong gold province, China   总被引：45，自引：0，他引：45  

Hong Rui Fan  Ming Guo Zhai  Yi Han Xie  Jin Hui Yang 《Mineralium Deposita》2003,38(6):739-750

The Sanshandao gold deposit, with total resources of more than 60 t of gold, is located in the Jiaodong gold province, the most important gold province of China. The deposit is a typical highly fractured and altered, disseminated gold system, with high-grade, quartz-sulphide vein/veinlet stockworks that cut Mesozoic granodiorite. There are four stages of veins that developed in the following sequence: (1) quartz-K-feldspar-sericite; (2) quartz-pyrite±arsenopyrite; (3) quartz-base metal sulfide; and (4) quartz-carbonate. Fluid inclusions in quartz and calcite in vein/veinlet stockworks contain C-O-H fluids of three main types. The first type consists of dilute CO₂–H₂O fluids coeval with the early vein stage. Molar volumes of these CO₂–H₂O fluid inclusions, ranging from 50–60 cm³/mol, yield estimated minimum trapping pressures of 3 kbar. Homogenization temperatures, obtained mainly from CO₂–H₂O inclusions with lower CO₂ concentration, range from 267–375 °C. The second inclusion type, with a CO₂–H₂O±CH₄ composition, was trapped during the main mineralizing stages. These fluids may reflect the CO₂–H₂O fluids that were modified by fluid/rock reactions with altered wallrocks. Isochores for CO₂-H₂O±CH₄ inclusions, with homogenization temperatures ranging from 204–325 °C and molar volumes from 55 to 70 cm³/mol, provide an estimated minimum trapping pressure of 1.2 kbar. The third inclusion type, aqueous inclusions, trapped in cross-cutting microfractures in quartz and randomly in calcite, are post-mineralization, and have homogenization temperatures between 143–228 °C and salinities from 0.71–7.86 wt% NaCl equiv. Stable isotope data show that the metamorphic fluid contribution is minimal and that ore fluids are of magmatic origin, most likely sourced from 120–126 Ma mafic to intermediate dikes. This is consistent with the carbonic nature of the fluid, and the cross-cutting nature of those deposits relative to the host Mesozoic granitoid.Editorial handling: R.J. Goldfarb  相似文献   

乳山金矿煌斑岩及流体和氢、氧、锶同位素研究   总被引：9，自引：1，他引：9  

翟建平  胡凯  陆建军 《矿床地质》1996,15(4):358-364

乳山金矿床是胶东近年来探明的一个赋存在花岗岩中的石英脉型金矿床。矿区出露的煌斑岩金含量较低，不可能是金矿化的重要物源者；成矿流体的成分与大气降水热液成分相类似，其氢、氧同位素值也很好地反映了大气降水经不同温度和Ｗ／Ｒ比值条件下水岩交换后的分布特征；锶同位素研究则表明，成矿物质主要来自昆嵛山花岗岩体。  相似文献   

模拟深井条件下的牙轮钻头单齿破岩试验          下载免费PDF全文

王克雄  夏宏南  翟应虎  蔡镜仑 《探矿工程》1996,(6):34-36

利用深井破岩试验装置，模拟了不同井深压力条件下对泥岩进行牙轮钻头单齿破岩试验，试验结果得出：随着井深的增加，岩石硬度增加，破碎岩的的力增加，石破碎体积减小，岩石破碎功增加，这是机械钻速低的根本原因，因此必须解决深井条件下的牙轮钻头齿形和布齿方式，以适应深井地层的钻井，达到提高机械钻速的目的。  相似文献   

中扬子台地北缘灯影组白云岩研究   总被引：3，自引：1，他引：3  

翟永红  郭成贤 《矿物岩石》1996,16(3):36-42

研究区白云岩成因类型可划分出准同生白云石化、回流渗透白云石化、混合水白云石化、压溶白云石化和埋藏白云石化。本文详细研了各成因类型的白云岩矿物岩石学特征和地球化学特征，重点探讨了埋藏白云石化Ｍｇ２＋来源及其搬运机理。认为埋藏白云石化Ｍｇ２＋来自粒间残留古海水，迁移机制与地下异常高压孔隙流体的驱动和襄樊－广济同沉积断裂的活动有关。五类白云岩中以混合水白云石化和埋藏白云石化的岩石类型储集性能最好。  相似文献   

钻孔灌注桩基础对紧邻地铁隧道产生竖向附加应力和变形的计算分析   总被引：8，自引：1，他引：8  

楼晓明  金志靖 《岩土力学》1996,17(3):48-53

采用群桩基础共同作用的分析方法，对某高层建筑钻孔灌注桩基础跨越地铁隧道线可能带来的影响进行了计算分析，计算中考虑了孔底沉渣的影响。计算结果表明，超长桩基础下卧层中的竖向附加应力与土的自重应力相比很小，引起桩基沉降的主要因素是桩身的压缩变形和孔底沉渣的变形，桩基础在隧道轴线方向上引起的最大相对变形曲率发生在基础边缘附近。  相似文献