本文選題：巖溶塌陷 + 分布特征��； 參考：《中國巖溶》2017年01期

【摘要】：通過綜合分析項(xiàng)目前期開展的塌陷群現(xiàn)場(chǎng)調(diào)查、物探、鉆探、地下水動(dòng)態(tài)長(zhǎng)期監(jiān)測(cè)等多項(xiàng)工作所獲取的珍貴資料,將泰安市區(qū)劃分為三個(gè)巖溶塌陷集中區(qū),分別討論了巖溶塌陷的發(fā)育條件、分布特征及成因演化過程,最后有針對(duì)性地提出了巖溶塌陷防治對(duì)策。研究結(jié)果表明,區(qū)內(nèi)巖溶塌陷多發(fā)生于以下區(qū)域:(1)埋藏型巖溶區(qū),地層巖性主要為奧陶紀(jì)-寒武紀(jì)灰?guī)r、白云巖;(2)斷裂及其影響帶;(3)上覆土層厚度小于20m,多層結(jié)構(gòu),即上部黏性土、中部砂類、下部黏性土區(qū)域;(4)巖溶地下水降落漏斗及其影響范圍內(nèi)。研究區(qū)巖溶塌陷是各種不良因素共同作用的產(chǎn)物,其中最重要的誘發(fā)動(dòng)力條件為水動(dòng)力條件,結(jié)合各類水文、地質(zhì)、災(zāi)害資料,繪制巖溶塌陷與地層、降水、開采及巖溶水位關(guān)系圖,可清晰地反映出在巖溶發(fā)育地區(qū)隨著巖溶水開采量增大,巖溶水位隨之降低,當(dāng)巖溶水位低于基巖面后,巖溶塌陷開始發(fā)生,并且隨著水位的降低及波動(dòng)幅度的增大,塌陷次數(shù)明顯增多的演化過程。
[Abstract]:Through the comprehensive analysis of the valuable data obtained from the site investigation, geophysical exploration, drilling and long-term monitoring of groundwater dynamics, the division of Taian City is divided into three karst collapse concentration areas.The development conditions, distribution characteristics and evolution process of karst collapse are discussed respectively. Finally, the countermeasures of karst collapse prevention and control are put forward.The results show that karst collapse occurs mostly in the following area: 1) buried karst area, and the stratigraphic lithology is mainly Ordovician Cambrian limestone, dolomite Xian2) fault and its influence zone: the overlying soil layer thickness is less than 20m, and the multi-layer structure.That is, upper clay, middle sand, and lower clay area. (4) karst groundwater fall funnel and its influence range.Karst collapse in the study area is the result of the joint action of various adverse factors. The most important induced dynamic condition is hydrodynamic condition. Combined with various hydrological, geological and disaster data, karst collapse, stratum and precipitation are drawn.The relationship between mining and karst water level can clearly reflect that the karst water level decreases with the increase of karst water exploitation in karst developed areas, and karst collapse begins to occur when the karst water level is lower than the bedrock surface.With the decrease of water level and the increase of fluctuation amplitude, the number of collapses increases obviously.
【作者單位】： 山東省第五地質(zhì)礦產(chǎn)勘查院;
【基金】：山東省國土資源廳地質(zhì)勘查項(xiàng)目[魯勘字2012(58)號(hào)]
【分類號(hào)】：P642.26

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