从江县登盆水库建设项目用地压覆矿产资源评估报告.doc

第1章 前 言1.1.项目由来登盆水库工程周边附近用水单位较多，其中包括庆云乡约1.15万人，和水库下游包括洛香镇境内共约有1.5万亩农田。目前庆云乡政府及村寨所在地人口用水主要是靠引溪流、山泉水、以及修建的小水池小水窖，保证率极低，人口用水不能得到保证，在枯季、尤其在干旱年份，供水难度更大，甚至有断水现象，当地村民只能去较远的山泉背水吃；农田灌溉大部分是靠天吃水，少部分可以利用渠道取水，但是目前绝大多渠道由于后期运行管理等问题，坍塌、淤积严重，且引水水源无调节功能，用水保证率也是无法保证。随着乡镇的发展、当地人民生活水平日益提高，用水问题日益明显，尤其近几年发生特大干旱灾害，庆云乡境内的灾害程度尤为严重。庆云乡内雨量丰富，多年平均年降水量为1178.4mm，只是年内分配不均，属于工程性缺水地区。为了解决当地人民的需水要求，缓解春旱灾害，同时促使当地经济又好又快的发展，国务院计划在省内投资新建一批新的水源工程，专门解决省内在特殊年份应急抗旱问题。登盆水库满足国家发展要求，并进入全国抗旱规划实施方案（2014-2016年）省81座小型水库名单。登盆水库位于省黔东南苗族侗族自治州内，工程规模为小（2）型，总库容为94.0万m3，主要工程任务为灌溉、集镇及农村人畜供水。业主为水利局。水库工程规模为等小（2）型水库，建设周期18个月，工程静态总投资6541万元。受水利局委托，省有色金属和核工业地质勘查局二总队承担了登盆水库工程项目建设用地压覆矿产资源评估工作（见委托书）。1.2 目的任务为了合理利用矿产资源，规范建设程序，按国土资发2010137号、黔土资发2010128号技术要求，建设项目需进行压覆矿产资源评估。此次工作目的是确定登盆水库工程项目建设用地是否压覆矿产资源，其任务如下：1、通过野外调查结合室内收集各类地质矿产资料，对拟建工程范围及附近区域的矿产资源分布情况进行了解；2、初步查明拟建工程建设项目征地范围及其外侧约500m范围评估区（水库保护区）内压覆的矿产资源种类、矿床规模和矿石质量，并估算评估区范围被压覆的矿产资源量。3、对压覆矿产资源的潜在经济价值作出评估。4、编制省登盆水库工程建设项目用地压覆矿产资源评估报告。1.3 建设项目概况1.3.1交通位置登盆水库工程位于庆云乡东北侧约7.0km左右，项目区地理坐标为东经：10907001090815，北纬：255004255143。拟建工程区距城约52km，至坝址有公路至左岸0.6km处有泥土路至坝址位置，对外交通条件较好（见交通位置图）。图1-1 拟建工程交通位置图1.3.2自然地理拟建的登盆水库位于庆云乡转珠村，所在河流卡其河为珠江流域柳江水系都柳江二级支流，其一级支流为独洞河。卡其河发源于庆云乡弄叼山，河源高程1019m，由西流向东，经转珠、浮里、油茶于岜作处汇入独洞河（又名洛香河），汇口处高程约255m。卡其河全流域集水面积22.8km2，主河道长约8.95km，主河道平均比降39.5，河道总体趋势上游较陡，中、下游较平缓，流域形状系数0.285，流域呈方形。拟建工程区属中亚热带温暖类型，年平均气温18.4，1月最冷平均气温7.8，极端气温4.4，7月最热平均气温为27.6，全年无霜期较长，气候宜人。当地居民人数约32万，其中农业人口占全县总人口的93.47%。以苗族、侗族、壮族、瑶族、水族等少数民族为主。经济以农业经济为主，农作物主要有玉米、小麦、大豆、水稻、马铃薯等。基本生活能自给自足。经济作物主要有油菜、烤烟、辣椒、柑桔、桃、李等。区内工矿企业较少，工业不发达，经济文化较落后。1.3.3项目简介主管单位：水利局建设单位：水利局设计单位：贵阳市水利水电勘察设计院建设项目批准机关：省水利厅建设项目批准文号：黔水计【2014】279号拟建地点：庆云乡转珠村拟用地范围：162.70亩（永久征地范围）拟投资规模：6541万元建设工期：18个月1.3.4主要工程概况登盆水库位于庆云乡转珠村的卡其河上，主要工程任务为灌溉、集镇及农村人畜供水，至设计水平年（2030年）灌溉供水量为124.6万m3/a（P=80%），可解决4250亩耕地（其中水田2500亩，旱地1750亩）的灌溉用水问题；集镇及农村人畜饮水供水量40.3万m3/a（P=95%），可解决庆云乡8216人（其中：集镇5010人，农村3206人）及2403头大小牲畜的饮水安全问题。水库正常蓄水位540m，死水位522m，兴利库容75.55万m3。水库设计洪水位541.43m（P=3.33%），校核洪水位541.92m（P=0.333%）总库容94万m3。水库工程等级为等，属小（2）型水库，建设周期18个月，工程静态总投资6541万元。主要水工建筑物拦河坝、泄水建筑物、引水建筑物等为5级，次要建筑物为5级，临时建筑物为5级。永久性主要建筑物按5级设计，永久性次要建筑物按5级设计，属一般建设项目。（1）大坝土工膜防渗当地风化料坝坝轴线长110.0m，坝轴线方位90，坝顶高程542.0m，坝顶宽6m，最大剖面时，上游防渗墙底部高程至坝顶高程高差为29.0m，排水棱体底部高程至坝顶高程高差为39.0m，坝轴线位置最大坝高为35.4m，最大坝底宽度为153.25m，大坝上游坝坡m1=2.5，下游坝坡m2=2.0，坝顶不允许过车。坝顶高程为542.0m，坝顶宽度为6.0m，上游侧设置高度为1.2m的C15混凝土防渗墙，下游侧设置0.2m0.2m排水沟，坝顶由上至下材料分别为：厚度为150mm的C15砼层、厚度为250mm碎石垫层、碾压风化料坝体。地质勘察资料显示，强风化带岩体内存在裂隙性绕坝渗漏问题，需进行坝基和两岸坡防渗处理。防渗处理方案为在上游坝坡脚设2m宽的C20混凝土防渗墙，在防渗墙上布置单排帷幕灌浆孔，孔距3m，防渗底界以岩体透水率5Lu以下10m为控制标准，两岸以正常蓄水位与地下水位线的交点为防渗端点。防渗线全长为339m，防渗面积为8878m2。（2）溢洪道溢洪道由引渠段、控制段、泄槽段、台阶消能段和消力池段组成。控制段堰顶高程为540.0m，堰顶原点上游曲线采用椭圆弧，椭圆弧与上游竖直面交点高程为539.7m；堰顶下游曲线采用WES幂曲线（y0.335x1.85）；WES曲线与泄槽段用半径为4.5m的反弧段相接，中心角47.53；泄槽起始断面宽15.0m，后接30.0m渐变段，渐变后泄槽宽度变为10m，坡比为1:15，侧墙高度为1.8m，宽度为1.2m，底板厚度为0.5m，底板及侧墙均采用C20钢筋混凝土；台阶消能段长度水平为27.0m，台阶宽度为1.0m，高度为1.0m，共27个台阶；溢洪道宽度为10.0m，边墙厚度为1.2m，高度为1.8m；消力池长度为8.0m，消力池底板高程499.0m。消力池底板及边墙均用C20混凝土，边墙底宽1.6m，顶宽1.2m，外侧坡比为1：3，高4.0m，底板厚1.0m。（3）取水、放空兼导流洞取水、放空以及导流洞建筑物采用永临结合，利用导流洞后期改造为取水兼放空底孔，采取隧洞布置管道形式，隧洞后在泵房及闸阀室内接各个管道引水。取水、放空兼导流洞布置在大坝左岸，取水口采用塔式进口。取水口进口底板高程为519.50m，闸门井筒顶部高程543.0m，启闭机室顶板高程为549.5m；设置检修闸门及拦污栅各一扇，检修闸门孔口尺寸1.61.8m，拦污栅孔口尺2.52.6m；闸门后经渐变段接直径为600m的管道，隧洞断面尺寸1.62.262m，C20钢筋混凝土衬砌厚0.3m，隧洞总长250.0m，底坡i=0.093；出口设置泵房及闸阀室，分别接水泵进水管、DN300西干管、DN400东干管以及DN100生态管；800的管道最后接闸阀室外消力池，消力池后利用明渠与下游河道衔接。经过计算，其抗滑、抗倾、抗浮稳定及地基应力均满足要求，隧洞供水能力满足取水要求，放空时间为18.23h。（4）输水建筑物供水管道结合本工程的供水范围、供水流量以及管道布置，经计算得出供水管道布置为：西干0+000西干2+580，管道长度为3316m，直径为300mm；东干0+000东干0+931，管道长度为1254m，直径为400mm；东干0+931东干1+548，管道长度为806m，直径为250mm。泵房设计（1）庆云乡泵房庆云乡泵站位于取水隧洞出口处，在隧洞出口的取水管上直接接水泵的进水管，通过泵站将水加压，泵站设计提水流量为0.0157m3/s，设计扬程为200m，共设2台KQW100-2010多级单吸离心泵，总装机60kW（230kW），主机间建筑尺寸为13.2m6.4m，电气间建筑尺寸为3.14m3.97m，底板高程为498.9m，采用砖混结构，基础置于强风化基岩中部；泵房后接DN150上水钢管，长度为790m；最后接高位水池，水池容积为300m3，底板高程为720.0m，为钢筋混凝土圆形水池。（2）登岜泵房登岜泵站位于东干管末端，泵站进水管直接从灌区E水池中取水，泵站设计提水流量为0.003m3/s，设计扬程为120m，共设2台KQDW50-158型卧式多级单吸离心泵，总装机22kW（211kW），建筑尺寸为10.24m4.74m，底板高程为502.3m，采用砖混结构，基础置于强风化基岩中部；泵房后接DN70上水钢管，长度为420m；最后接高位水池，水池容积为100m3，底板高程为605.0m，为钢筋混凝土圆形水池。水池设计设计采用04S803圆形钢筋混凝土蓄水池定型100 m3、300m3、500 m3水池。池壁和池底均为C25钢筋混凝土结构，顶板上设置检查孔，池内设计水深为3.3m，闸阀室采用M10水泥砂浆砌MU10砖墙结构，水池底板地基承载力不小于100KPa。1.3.5项目征地概况枢纽工程建设区征（用）地范围根据枢纽工程建设区的施工总布置确定。并按用地性质分为工程永久占地和施工临时占地两部分。工程永久占地：为水库库区等。施工临时用地：包括施工临时公路、施工生活区、渣场、料场、施工工厂等用地，此外，将施工影响区列入施工临时用地范围。1、水库库区永久占地水库库区范围土地总面积为162.70亩，其中耕地基本耕地89.79亩，用材林32.54亩，灌木林25.32亩，水域15.05亩。2、临时用地范围：由混凝土拌合站、综合加工厂、施工营地及仓库、弃渣场、土料场等构成。临时征用土地涉及土地总面积122.40亩，其中耕地88.06亩，用材林21.76亩，灌木林12.58亩。3、输水管道工程及其他水利工程建设区永久征收土地涉及土地总面积13.71亩，其中耕地5.03亩，用材林4.32亩，灌木林4.36亩。根据业主单位要求，本次工作中仅对永久征地区块进行评估。本次评估永久征地区块范围坐标如表1-1。表1-1 永久征地范围坐标拐点表序号北京54坐标西安80坐标X坐标Y坐标X坐标Y坐标12861015915286095786522860990.45736612497.2142860932.45736612425.16432860924.22536612489.2802860866.22536612417.23042860831.30236612548.9022860773.30236612476.85252860799.94536612535.0422860741.94536612462.99262860783293286072524372860776.65136612542.0312860718.65136612469.98182860765.58336612537.4342860707.58336612465.38492860763.41036612533.3122860705.41036612461.262102860756.01736612529.5982860698.01736612457.548112860746.86636612535.1202860688.86636612463.070122860736.92036612532.6562860678.92036612460.606132860724.98236612528.3352860666.98236612456.285142860711.68636612521.9962860653.68636612449.946152860700.03136612519.7062860642.03136612447.656162860690.04636612519.4402860632.04636612447.390172860680.99236612522.7572860622.99236612450.707182860673.88736612527.5392860615.88736612455.489192860666.98236612529.5562860608.98236612457.506202860659.84236612527.7682860601.84236612455.718212860657.32936612517.8052860599.32936612445.755222860657.87736612500.4972860599.87736612428.447232860657.12436612483.3322860599.12436612411.282242860653.01836612474.7052860595.01836612402.655252860646.51636612462.3122860588.51636612390.262262860638.43236612451.3622860580.43236612379.312272860633.78136612443.5642860575.78136612371.514282860627.81536612437.3822860569.81536612365.332292860623.16136612436.4802860565.16136612364.430302860619.01036612437.6132860561.01036612365.563312860610.27436612445.0132860552.27436612372.963322860594.56036612460.4172860536.56036612388.367332860590.70836612465.2142860532.70836612393.164342860586.30636612473.5692860528.30636612401.5193528605816412860523591362860577.11136612490.9002860519.11136612418.850372860570.75136612495.4222860512.75136612423.372382860562.91636612499.2222860504.91636612427.172392860556.38836612504.3952860498.38836612432.345402860547.45836612513.0862860489.45836612441.036412860541.84336612515.1162860483.84336612443.066422860533.24436612515.5062860475.24436612443.456432860526.49436612518.4912860468.49436612446.441442860522.11936612524.7542860464.11936612452.704452860518.29036612538.9222860460.29036612466.872462860510.86736612555.5742860452.86736612483.524472860509.46436612565.5762860451.46436612493.526482860503.41136612577.6402860445.41136612505.590492860500.75236612584.3892860442.75236612512.339502860497.29136612586.2892860439.29136612514.239512860495.39236612587.4292860437.39236612515.379522860491.58136612597.7352860433.58136612525.685532860490.98336612604.8782860432.98336612532.828542860487.61936612610.1132860429.61936612538.063552860488.67136612617.7282860430.67136612545.678562860486.65236612627.0992860428.65236612555.049572860483.28636612633.2272860425.28636612561.177582860477.24836612637.7722860419.24836612565.722592860471.19636612658.5592860413.19636612586.509602860468.34936612672.9152860410.34936612600.865612860468.34936612677.9932860410.34936612605.943622860464.05836612699.8532860406.05836612627.803632860463.76836612710.7312860405.76836612638.681642860466.91636612735.2592860408.91636612663.209652860470.42736612757.3412860412.42736612685.291662860472.59236612769.5632860414.59236612697.513672860472.91736612779.3782860414.91736612707.328682860474.43336612786.8782860416.43336612714.828692860476.40236612792.9002860418.40236612720.850702860476.40336612801.3082860418.40336612729.258712860472.91436612810.6462860414.91436612738.596722860464.97236612822.8952860406.97236612750.845732860463.50136612827.0112860405.50136612754.961742860463.88036612839.8012860405.88036612767.751752860461.53336612844.2442860403.53336612772.194762860456.74336612848.8222860398.74336612776.772772860454.47036612856.9982860396.47036612784.948782860454.08336612863.0372860396.08336612790.9877928604557042860397654802860454.29136612873.4852860396.29136612801.435812860445.43536612885.6792860387.43536612813.629822860439.68936612896.1502860381.68936612824.100832860436.73936612897.3732860378.73936612825.323842860433.72536612896.3332860375.72536612824.283852860429.75736612896.6822860371.75736612824.632862860408.34236612908.9742860350.34236612836.924872860408.24636612907.7662860350.24636612835.716882860412.68836612900.5672860354.68836612828.517892860420.02836612891.7252860362.02836612819.675902860420.11036612885.0002860362.11036612812.950912860422.89536612866.7872860364.89536612794.737922860419.82136612855.1582860361.82136612783.108932860414.97136612846.8932860356.97136612774.843942860415.35336612840.5562860357.35336612768.506952860430.06636612822.4722860372.06636612750.422962860430.77036612817.1442860372.77036612745.094972860433.40236612812.1082860375.40236612740.058982860433.10536612809.7742860375.10536612737.724992860429.72836612804.7082860371.72836612732.6581002860429.29536612801.0702860371.29536612729.0201012860425.21936612791.8082860367.21936612719.7581022860423.66736612789.0872860365.66736612717.037103286042455328603665031042860423.61936612775.8892860365.61936612703.8391052860422.19736612773.2652860364.19736612701.2151062860421.30036612766.8122860363.30036612694.7621072860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