共查询到19条相似文献,搜索用时 656 毫秒
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横冲滑雪场位于湖北保康县,在收集资料和进行现场调查的基础上,对生产运行期及自然恢复期的水土流失问题进行了现状与预测分析。根据分析结果,划分了水土流失重点影响区和次重点影响区,并提出了分区水土保持防治措施,践行了生态文明发展的理念。 相似文献
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现阶段我国矿产资源数量多、规模大,但由于受自然灾害和不合理开采活动的影响,造成矿区水土流失现象严重,为此提出矿山开采区水土流失的治理重点及防治措施。通过分析矿区水土流失问题的治理重点,提出一系列防治措施,合理制定水土流失灾害的防治规划,结合矿区地形环境的特点,采取综合治理模式,有针对性的建设防害工程,并且加强监管力度,从根本上减少水土流失现象的发生。 相似文献
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广东省乐昌市铅锌尾矿位于粤北乐昌市以东4km处,占地约1.5km~2,采矿属常规地下采矿,选矿工程产生的尾矿以泥浆的形式流入到尾矿库中,通对铅锌尾矿进行地质灾害危险性评,综合评定该矿区开采用地适宜性为基本准则,对场地进行地质灾害防治分区,分为次重点防治和一般防治,建议对不同的灾种及危害程度分别采用工程措施、监测预警措施和生物措施进行防治。 相似文献
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危岩体是影响人类生命财产安全与工程活动的自然地质灾害之一.对危岩体的勘察、稳定性评价与防治是地质灾害防治的研究难题.受危岩体复杂地质特征影响,南门湾危岩体由20余个危岩块体组成,其防治设计存在一定工程风险.本文通过分析岩体裂隙系统发育状况,在W6危岩单体稳定性研究的基础上,建立了赤平投影法评价危岩体稳定性的判断标准与南门湾危岩体的稳定性分区,提出了对应的防治措施建议.本文的稳定性研究具有一定的理论意义,对该危岩体的防治工程具有指导意义. 相似文献
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<正>拟建工程位于宜黄县桃陂镇,地质灾害危险性评估级别为一级。本文通过资料搜集、实地地质调查、综合分析等工作手段,在对拟建工程区地质环境特征进行分析的基础上,对地质灾害的危险性现状、地质灾害危险性预测及拟建工程建设用地适宜性分区进行了评估,并提出了相对应的防治措施,以期为工程设计和施工提供重要的防灾减灾地质依据。 相似文献
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缅甸达贡山镍矿项目所在地天然地基土的孔隙比较大,且含水量较高,从而导致土层失水干缩、地基产生不均匀沉降,会造成拟建建(构)筑物变形、甚至破坏,故不能作为基础持力层,必须进行地基处理。结合该项目基本建设工程冶炼主厂房基础施工实例,在项目实际施工条件背景下,通过介绍复合载体夯扩桩的技术原理、项目选取桩型的比选方案、施工工艺、施工应用以及桩基础检测工作,详尽阐述复合载体夯扩桩的工程效用和经济效益。 相似文献
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易平 《有色冶金设计与研究》2014,(2):1-4,11
从滑坡滑带土力学强度参数反分析的基本理论入手,利用折线型滑坡工程实践中应用最为广泛的传递系数法,依据滑坡变形特征确定稳定性评估指标,结合赣州石上高含水浅层滑坡工程实例建立了反分析计算模型。通过联立两个反分析计算剖面,采用插值法和图解法联合求解了高含水浅层滑坡滑带土强度参数c、φ值,其计算结果基本能够满足滑坡稳定性分析和滑坡工程防治设计的要求。 相似文献
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利用羧甲基壳聚糖的环境友好性和成模性将其作为缓释载体,将EDTA和羧甲基壳聚糖按照1∶1的配比通过喷雾干燥器制备了的缓释EDTA。以缓释EDTA为研究对象,进行了表征分析、缓释动力学研究、土壤重金属静态活化特性和动态淋溶特性研究。结果表明,缓释EDTA包封率可达87.51%,在水中释放过程符合Higuchi模型,具有明显的缓释效果。缓释EDTA相比EDTA可以在提高土壤溶液中Pb、Cd离子浓度的同时有效控制Pb、Cd离子的突增,促使土壤溶液中的Pb、Cd离子保持适量浓度持续提升。动态淋溶结果表明,添加两种不同形式的EDTA会显著提升Pb、Cd的淋失量,但缓释EDTA处理能显著降低Pb、Cd的初始淋失量和淋失总量,其中Pb和Cd的淋失总量分别降低了19.5%和20.9%。 相似文献
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Dar-Hao Chen Pat Harris Tom Scullion John Bilyeu 《Canadian Metallurgical Quarterly》2005,19(4):324-330
This paper focuses on the cause, possible solutions, and future prevention of pavement heave at a new construction project. We speculated that heaving on the east side of the project was caused by a reaction between the lime stabilizer and minerals in the soil. Because of a difference in soil chemistry, the west side of the project (which was still under construction) did not show evidence of heaving. A forensic investigation was initiated to test our hypothesis. The findings of the investigation concluded that the cause of the heaving on the east side of the road was related to the formation of the expansive mineral, ettringite. Ettringite formed due to the reaction of the lime stabilizer with seams of high sulfate soil on the east side. Laboratory testing did not find any effective stabilizer for the high-sulfate soils on the east side. Therefore, reconstruction would involve removing and replacing the treated layer with a select material that has less than 2,000?ppm sulfates. Test results indicate that there was no threat of sulfate heave on the west side. District personnel had performed the field conductivity tests to evaluate and monitor the concentration of the sulfate content on the remaining project. The treatment of 3%/72-h mellowing period/3% lime treatment was employed on the west side. The whole project has been completed for 1?year and no heave has been observed. 相似文献
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因软弱土体的存在,会产生地基承载力不足、整体稳定性不够和地基差异沉降过大等现象,为保证工程的安全使用,需对软弱土进行处理.本文根据某一工程实例,通过分析存在的问题以及需要满足的要求,提出增强土体强度满足整体稳定性、延缓孔隙水压力的消散控制地基差异沉降的处理方案.运行结果显示,效果良好. 相似文献
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叙述了宝钢3BF炉体的冷却方式、水系统的纯水处理方案及存在的主要问题,详细介绍了炉体纯水系统新的水处理方案及实际处理效果,并对今后炉体纯水系统的管理与处理工作提出了一些建议. 相似文献
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Sudan grass is a moderately salt-tolerant annual that is capable of substantial osmotic adjustment under high soil salinity conditions, but little is documented about its actual water use and yield under saline conditions. We estimate water use and evaluate the effects of “reduced-runoff” irrigation on soil salinity associated with Sudan grass hay production during a three-year field study (1996–98) in the Imperial Valley, California. The reduced-runoff irrigation method relies on the application of a simplified volume-balance surface irrigation model, and can result in negligible surface runoff; however, its use may have adverse impacts on soil salinity. Despite an anticipated salinity-induced yield reduction of about 15% associated with an average soil salinity of 6 dS∕m (0–0.6 m depth), use of the reduced-runoff method resulted in satisfactory crop yields, practically no tailwater runoff, and a slight decrease from the initial average profile soil salinity. The average applied water depth and estimated consumptive use (ETc) during the project were 1,019 and 935 mm, respectively, resulting in an average hay yield of 14.4 Mg∕ha versus the 1996–98 county average of 12.6 Mg∕ha. The project average ETc/ET0 and yield∕ETc ratios of 0.73 and 15.5 kg∕ha?mm, respectively, were approximately 15% less than those estimated from water-use-efficiency studies, probably as a result of salinity-induced hay yield reduction. 相似文献
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以黑龙江某金矿露天转地下开采设计为例,阐述了露天转地下开采矿山采取的一般防洪措施。同时,提出对于有露天坑贮水条件的矿山,可充分利用露天坑底贮存洪水,按照贮、排平衡原则,合理布置贮、排水系统,以较小的投入保证矿山安全生产。 相似文献