共查询到20条相似文献，搜索用时 78 毫秒
1.
代池坝煤矿进入深部开采,通过对矿区深部水文地质条件研究与矿井充水因素分析,认为矿床充水含水层为富水性弱~中等的砂岩裂隙含水层,各含水层间水力联系差,深部开采面临含水层地下水水压变大,具有一定的危险性。矿井主要充水水源为大气降水、含水层砂岩裂隙水、地表水和采空区积水。矿区主要充水通道是煤层开采后形成的导水裂缝带和矿区范围内11个报废钻孔。采用了比拟法的计算:深部标高+320~+50m范围内正常涌水量为234m~3/h,最大涌水量为509m~3/h。 相似文献
2.
早子沟金矿是西秦岭地区发现的特大型金矿床。随着开采深度加大,矿坑涌水成为影响矿山生产的主要因素之一。本次采用解析法和比拟法进行矿坑涌水量预测,结果表明：若将早子沟金矿矿山开拓至2 100 m标高,借用等效介质孔隙含水层,运用地下水向潜水完整井运动的裘布依公式预测,正常矿井涌水量为2 976.32 m3/d,矿井最大涌水量为3961.10 m3/d;依据矿区已知井下排水资料,比拟法计算得出正常矿井涌水量为3 704.99 m3/d,矿井最大涌水量为4 350.37 m3/d。综合分析认为,解析法水文地质参数求取容易产生误差,结果只能作为参考;比拟法经验公式计算简洁,计算参数相对可靠,结果更符合矿坑实际情况。因此,早子沟金矿矿坑涌水量预测应采用比拟法。 相似文献
3.
4.
宝鼎矿区深部水文地质条件研究及涌水量计算 总被引：1，自引：0，他引：1
宝鼎矿区浅部资源行将枯竭,深部开采已迫在眉睫,而预测深部涌水量成为其首要解决的问题。通过对矿区深部水文地质条件研究与矿井充水因素的分析,认为矿区各含水间水力联系差,同一含水层组的不同地段间的含水裂隙的连通性亦差;断层多为高角度压性逆断层,导水性差,富水性弱;矿区上部水平及下部水平的浅埋区的充水水源主要为大气降水和老窑水,而下部水平主要的充水水源为上覆水平的采空区积水和地下水。运用比拟法和地下水动力学对延深的第一接替水平四个区段的较大涌水量和一般涌水量进行了计算,经过比较,采用了比拟法的计算结果：矿井的一般涌水量为2860.88m3/d,据此提出了切实可行防治水措施,从而为矿井深部建设提供了水文地质依据。 相似文献
5.
6.
新密煤田在开采二1煤层时,矿井涌水量从每小时数立方米到上千立方米,差别极大,个别矿井因水量太大多年达不到设计开采能力。在研究矿区水文地质条件的基础上,分析了煤层的充水特征,认为煤层的顶板直接充水含水层是二叠系下统下石盒子组底部的砂岩裂隙水,底板直接充水含水层是石炭系太原组灰岩岩溶裂隙含水层,奥陶系岩溶裂隙含水层是煤层底板间接充水含水层;通常情况下顶板水不会对采煤构成威胁,灾害性突水主要来源于煤层底板;石炭系灰岩含水层与奥陶系灰岩含水层水力联系较密切,通常矿井大的涌水都有奥陶系灰岩水参与;大隗断层使得区内寒武系中上统灰岩直接与二叠系石千峰组砂、页岩接触,隔断了南北两侧的水力联系,并将矿区分割为两个水文地质亚区;矿井在开采深度在+50m标高以上时,充水水源主要来源于煤层顶板,底板无水,在开采深度在+50m以下时,矿井涌水量相对较大,随着开采深度的增加,矿井涌水量有逐渐减小的趋势。该研究对确定矿井充水因素,进行突水预防具有指导和借鉴意义 相似文献
7.
《地下水》2019,(6)
石炭井矿区位于宁夏回族自治区贺兰山北段,矿区内矿井的主要充水水源为大气降水、地表间歇性水流、沟谷砂砾石冲洪积层潜水、含水层承压水、采空区积水、断层破碎带充水、封闭不良钻孔、基岩露头和露头剥离带。通过对石炭井矿区的矿井用水量与各冲水因素关系进行分析,并估算了矿井涌水量,研究认为:含水层承压水和采空区积水为矿井主要充水水源。结合历年矿井实测涌水量,并采用2006-2013年的矿井涌水量实际资料作为划分依据,预计矿井三水平全面投产后的正常涌水量175 m~3/h,最大涌水量为181 m~3/h。大气降水、矿井涌水量与大气降水、采深等有明显相关关系,矿井涌水量与大气降水呈现正相关关系,而矿井涌水量与采深则呈现正相关关系。 相似文献
8.
通过对井田边界条件、主要含水层的富水特征、断层的水文地质特征以及地下水的补给、径流及排泄条件的分析研究,认为二1煤层顶板的直接充水水源为顶板砂岩裂隙水,底板的直接充水水源为石炭系太原组上段石灰岩岩溶裂隙水,底板的间接充水水源为石炭系下段太原组灰岩岩溶裂隙水和寒武系白云质灰岩岩溶裂隙水;矿井充水通道为顶板砂岩、底板灰岩的裂隙和断层带。采用大井法对先期开采地段二1煤层-700m水平的矿井涌水量进行了预算：正常涌水量为947m^3/d,最大涌水量为1140m^3/d。结合邻近矿井的调查,认为计算的涌水量是可靠的,可作为煤矿建井设计和水害防治的依据。 相似文献
9.
长河煤矿为地质构造中等复杂区，其矿区地质及水文地质条件表明，地表水、直接充水含水层煤系砂岩裂隙水、老窑水、构造断裂带水都可构成该矿井开采的充水因素，且其涌水量大小与大气降水关系密切。针对矿井开采的具体情况提出了一系列的防治措施，并取得了良好的效果，对煤矿水害的防治有一定的指导意义。 相似文献
10.
11.
Guboglo M. N. 《GeoJournal》1980,4(1):53-58
International unity is becoming ever stronger in this country owing to an increasing similarity in the development of the cultural environment. This comprises the provision of all the country's republics with a sufficient number of schools, theatres, and other institutions and cultural information media in accordance with the needs of the population. An important part is played by the rise in ‘the general educational level, as well as the level of professional qualifications and skills. Among all the Soviet nations and nationalities, this rise being more rapid among formerly backward peoples. Prominent among the factors of internationalization is the progressive development of the nationalities’ cultural resources, while professional culture is being increasingly brought within the reach of the masses.The implementation of the nationalities policy promotes the all-round development of all Soviet nations and nationalities, their drawing together, the upsurge of the individual capabilities of every Soviet citizen. 相似文献
12.
Jiayu Rong Michael Melchin S. Henry Williams Tatyana N. Koren Jacques Verniers 《《幕》》2008,31(3):315-318
The Global Stratotype Section and Point （GSSP） for the base of the Silurian System was defined in 1985. Since that time, a number of researchers have suggested that this section has serious deficiencies for use as a GSSP. As a result, in 2000, the Subcommission on Silurian Stratigraphy （SSS） proposed undertaking a formal restu@ of this GSSP, which was subsequently approved by the International Commission of Stratigraphy （ICS）. The result of this restudy was the formal proposal that the current GSSP, at 1.6 m above the base of the Birkhill Shale, at Dob＇s Linn, Scotland, should be maintained as the same locality and stratigraphic level, but the bios- tratigraphical definition of the boundary should be revised. The previously defined, basal Silurian grapto- lite zone, the Parakidograptus acuminatus Zone, should be subdivided into a lower Akidograptus ascensus Zone and a higher E acuminatus Zone. The base of the A. ascensus Zone, marked by the first appearance of A. ascensus, should be regarded as the biostratigraphic mark for the base of the Silurian. This proposal has now been formally approved by the SSS and ICS, and ratified by International Union of Geological Sciences. This is the first GSSP to undergo formal restudy and redefini- tion, and the proposal also included a recommended procedure for restudy of GSSPs. 相似文献
13.
Deviation of the major axis of the inertia ellipsoid of the Moon from the direction toward the Earth
B. P. Kondratyev 《Astronomy Reports》2017,61(8):709-714
It is known from observations that the center of mass of the Moon does not coincide with the geometric center of its figure, and the line connecting these two centers is not aligned with the direction toward the center of the Earth, instead deviating toward the Southeast. This stationary deviation of the axis of the inertia ellipsoid of the Moon to the South of the direction toward the Earth is analyzed. A system of five linear differential equations describing the physical libration of the Moon in latitude is considered, and these equations are derived using a new vector method taking into account perturbations from the Earth and partly from the Sun. The characteristic equation of this system is obtained, and all five oscillation frequencies are found. Special attention is paid to the fifth (zero) frequency, for which the solution of the latitude libration equations are stationary and represents a previously unknown additional motion of the rotational axis of theMoon in a cone with a small opening angle. In contrast to the astronomical precession of the Earth, the rotation of the angular-velocity vector is in the positive direction (counter-clockwise), with the period T 3 = 27.32 days. On this basis, this phenomenon has been named “quasi-precession.” This quasi-precession leads to a stationary inclination of the major axis of the inertia ellipsoid of theMoon to the South (for an observer on Earth), making it possible to explain one component of the observed deviation of the center of mass of the Moon from the direction toward the Earth. The opening angle of the quasiprecession cone is approximately 0.834″. 相似文献
14.
东濮凹陷北部沙三中亚段广泛发育盐岩和烃源岩,这两个看似不能共存的物质却在这里互层共生。该时期研究区沉积特征为多盐韵律与多层烃源岩互层共生、连续沉积,单个盐韵律厚度从几米到十几米,烃源岩有机质丰度高、类型好。平面上,两者在湖盆沉积沉降中心共生;垂向上,高有机质丰度、好干酪根类型与高盐度地层具有较好的对应关系。因而成为恢复古气候和古环境的重要研究对象。通过岩石学、古生物学以及Sr/Ba、B/Ga、(V+Ni+Mn)、Fe/Mn、Sr/Cu、Mg/Ca、V/(V+Ni)、稀土元素含量和氯同位素等方法对凹陷北部沙三中亚段的沉积环境进行研究。结果表明,凹陷北部沙三中亚段为深水沉积的还原环境,古盐度较高,达到半咸水-咸水沉积;微量元素和孢粉化石特征表明研究区沙三中亚段为温暖潮湿的环境。 相似文献
15.
16.
17.
Important tendencies in development of the world mineral-resources sector at the beginning of the 21st century were an increase in production and consumption of mineral materials differentiated by types of metals and nonmetallic mineral raw materials, by countries and regions, as well as the concentration of the production of mineral raw materials in a small number of countries, and a reduction in industrial reserves of minerals in the world economy, even at the current stage of their extraction. These tendencies should be taken into account in working out a strategy for development of the Russian mineral raw-material base. 相似文献
18.
Fouad N. Ibrahim Dr. 《GeoJournal》1988,17(1):133-141
Taking the example of W Sudan, an analysis of the climatic incidents leading to the two recent famine disasters is made. On this natural background, the human side is investigated. Focus is directed towards the fragile economic structure of the famine-prone population groups. An early-warning system for famine in the Sahelian Zone is proposed taking grain production and storage, livestock development and the relationship between the prices of livestock and grain as major indicators. 相似文献
19.
郯庐断裂南段研究进展与断裂性质讨论 总被引：13，自引：3，他引：13
据1：5万区域地质调查和专题研究资料，就郯庐断裂带是否南延与消失的原因，其与大别—苏鲁造山带交截形成的假位错效应，以及与中新生代沉积盆地形成演化的关系等作了新的阐述。在此基础上，讨论了郯庐断裂带是否为巨大的左行平移断层或转换断层。认为郯庐断裂带可能是在“古郯庐带”的基础上于早侏罗世重新活动、白垩纪强烈活动的地堑型枢纽断裂带。 相似文献
20.
The Importance of the Precipitation and the Susceptibility of the Slopes for the Triggering of Landslides Along the Roads 总被引：3，自引：1，他引：2
Clemente Irigaray Francisco Lamas Rachid El Hamdouni Tomás Fernández José Chacón 《Natural Hazards》2000,21(1):65-81
In order to characterise the influence of the heavyrains on the observed landslides during the 1996–1997hydrological cycle, rainfall records for the last 100years are analysed from 104 stations in easternAndalusia. Regarding the amounts of rain recordedbetween October 1996 and March 1997 in the 104stations studied, 31 presented new all-time records;15 presented values that were 80–100% of thepre-1995 record; 49 stations, 80–50%; and 9stations, < 50%. A map has been devised of thesusceptibility of the materials through which thesouth-eastern Andalusian road network crosses,together with an inventory of the damage caused byinstability phenomena on banks and cuttings of theroad network during the winter of 1996–1997. Therelationships between the rainfall during the studyperiod, the damage caused to the road network and thesusceptibility of the materials affected are analysed.The results indicate that there is a clearcorrespondence between the rainfall recorded and thesusceptibility of the materials with the inventorieddamage. It is concluded that the widespread seriousdamage caused in early 1997 to the roads andsurrounding areas in the Alpujarra region and thecoast of the Province of Granada was mainly caused bythe extraordinarily heavy rains. However, considerablyless damage was observed where the susceptibility ofthe terrain is low, thus highlighting the extremeusefulness of terrain-susceptibility maps for riskprevention and territorial planning. 相似文献