贵州"西电东送"电煤保障建议

分析了贵州省“西电东送”火电建设中电煤保障方面存在的突出问题:矿井建设电煤资源保障存在缺口,当前矿井建设中地质勘查依据不足,从而增大了矿井建设投资风险并为生产事故多发和资源浪费埋下祸患,煤矿采矿及管理人才匮乏等。针对存在的问题提出了建议,供制定规划和领导决策参考:(1)贯彻落实国务院《关于加强地质工作的决定》,加强、加快贵州省煤炭地质勘探工作;(2)加快贵州省大中型煤矿建设,加强对小煤矿的管理、监督、引导和资源整合重组;(3)加快煤矿采矿和地质技术人才培养,特别是中等实用技术人才的培养。     

全漏失钻孔预送冲洗液时间的确定

在岩心钻探施工中,全漏钻孔的预送冲洗液时间问题往往困扰着机台施工人员,为此提出了预送冲洗液的两种计算方法。     

段老汉送礼

2月4日,立春日,农历腊月二十一。 年味浓浓,喜气洋洋。街上赶集的人们忙忙碌碌,都在大兜小袋地置办着年货。然而,上断村年逾花甲的段老汉却乐呵呵地走进了陕县西李村国土资源所。     

磁县开展“送法”下乡活动

初春时期，农村居民建房热潮又要到来，为防止群众乱建、乱占违法行为发生，磁县土地管理局积极组织法律、法规培训，广泛开展“送法”下乡活动，效果良好。     

DEPTH-AVERAGED 2-D CALCULATION OF FLOW AND SEDIMENT TRANSPORT IN CURVED CHANNELS

The helical flow significantly affects the flow, sediment transport and morphological evolution in curved channels. A semi-empirical formula is proposed to determine the cross-stream distribution of the helical flow intensity in the developed regions of a channel bend. It is then used to evaluate the dispersion terms in the depth-averaged 2-D momentum equations and suspended-load transport equation as well as the bed-load transport angle, thus enhancing the depth-averaged 2-D model to account for the effect of helical flow. The tests in several experimental and field cases show that the enhanced depth-averaged 2-D model can much more reasonably predict the shifting of main flow from inner bank to outer bank, the erosion along outer bank and deposition along inner bank than the depth-averaged 2-D model without considering this effect.     

特殊的“节日礼物”

"矿产资源大家管,若有人违法把资源占,依法处理人丢完……"3月19日上午,宝丰县大营镇小沈河村热闹非凡,人们像过节一样聚集在村委会大院听说书。台上艺人唱得投入,伴奏得默契,台下群众听得入迷。原来,宝丰县国土资源局为宣传矿产资源法律法规,利用3月19日矿法宣传日,开展"送法下乡"活动,通过说书大力宣     

云南景洪水电站大坝强震观测系统

随着我国西部大开发战略的逐步推进,“西电东送”的逐步落实,西部大型水电站特别是西南地区的几大主要河流上建设得越来越多,许多大型电站都处于地震构造带或者地震高发带,根据国家法律法规对大坝强震动观测的建设规范要求,设计烈度为Ⅶ度以上的Ⅰ级大坝、Ⅷ度以上的Ⅱ级大坝都必须建设强震动观测台阵,目的是记录水库蓄水前后水库周边的天然地震活动或者水库诱发地震对大坝结构的影响,为这些大型水库的后期建设、运行维护和震害调查提出科学依据和重要的参考资料.     

华侨大学厦门校区预应力管桩沉桩超送问题的探讨

以华侨大学厦门校区为例，对厦门湾地带采用预应力管桩沉桩超送问题的成因进行了分析，并提出了处理方法。     

AN ANALYTICAL SOLUTION FOR CALCULATING THE INITIATION OF SEDIMENT MOTION

This paper presents an analytical solution for calculating the initiation of sediment motion and the risk of river bed movement. It thus deals with a fundamental problem in sediment transport, for which no complete analytical solution has yet been found. The analytical solution presented here is based on forces acting on a single grain in state of initiation of sediment motion. The previous procedures for calculating the initiation of sediment motion are complemented by an innovative combination of optical surface measurement technology for determining geometrical parameters and their statistical derivation as well as a novel approach for determining the turbulence effects of velocity fluctuations. This two aspects and the comparison of the solution functions presented here with the well known data and functions of different authors mainly differ the presented solution model for calculating the initiation of sediment motion from previous approaches. The defined values of required geometrical parameters are based on hydraulically laboratory tests with spheres. With this limitations the derivated solution functions permit the calculation of the effective critical transport parameters of a single grain, the calculation of averaged critical parameters for describing the state of initiation of sediment motion on the river bed, the calculation of the probability density of the effective critical velocity as well as the calculation of the risk of river bed movement. The main advantage of the presented model is the closed analytical solution from the equilibrium of forces on a single grain to the solution functions describing the initiation of sediment motion.