本文選題：巖體　切入點：結(jié)構(gòu)面　出處：《成都理工大學》2017年碩士論文　論文類型：學位論文

【摘要】：邊坡的巖體結(jié)構(gòu)特征是控制邊坡失穩(wěn)模式的關(guān)鍵因素。如何有效地查明坡體內(nèi)部巖體的結(jié)構(gòu)特征?在沒有平硐及豐富鉆孔資料的情況下,物探和地面調(diào)查相結(jié)合是較為有效的手段。和其它物探方法相比高密度電法具有操作難度低、成本低、精度高、效率高等優(yōu)勢,在邊坡深部巖體結(jié)構(gòu)特性探測中的應用越來越廣泛,但目前主要用于對地下結(jié)構(gòu)體的定性解釋,對結(jié)構(gòu)面及巖體結(jié)構(gòu)的定量或半定量解釋研究較少。在這種情況下,基于高密度電阻率法建立一套針對邊坡巖體結(jié)構(gòu)探測的分析評價體系,顯得非常緊迫與必要。本文以貴州馬達嶺煤礦采空區(qū)邊坡巖體結(jié)構(gòu)探測及瀾滄江苗尾水電站傾倒變形邊坡巖體結(jié)構(gòu)探測為例,通過結(jié)構(gòu)面電性特征、巖體破裂程度電性特征等研究,遵循定性分析與定量評價相結(jié)合的基本學術(shù)思想,建立了一套較完善的邊坡巖體結(jié)構(gòu)探測技術(shù)方法體系。取得的主要研究成果如下:(1)建立了一套適合具備一定規(guī)模的Ⅰ、Ⅱ類結(jié)構(gòu)面高密度電法探測方法體系。通過數(shù)值計算,系統(tǒng)研究了結(jié)構(gòu)面各主要參數(shù)與高密度電阻斷面圖異常之間的聯(lián)系,提出了基于高密度電阻率斷面圖的結(jié)構(gòu)面特征定量識別方法;(2)采用場地試驗法初步建立了較為完善的基于高密度電阻率法的采空區(qū)賦存特征判別體系。選取完整采空區(qū)、坍塌充填采空區(qū)、充水采空區(qū)為試驗對象進行對比分析,研究了高密度斷面圖中采空區(qū)的異常特征,初步建立了采空區(qū)定性判別標準;(3)結(jié)合巖體電阻率影響因素與工程地質(zhì)條件,建立了巖體破裂程度評價的“破裂程度指標”△φ。根據(jù)巖體處于的不同工程地質(zhì)條件,在水位以上巖體、水位以下巖體以及夾泥巖體三種假設條件下推導了求取“破裂程度指標”的公式方法,并以此對巖體破裂情況進行定量評價。(4)基于上述研究成果,初步建立了較為完善的基于高密度電阻率法的邊坡巖體結(jié)構(gòu)探測方法體系,系統(tǒng)闡述了探測方法和實施步驟。即:高密電阻率法是巖體結(jié)構(gòu)探測中收集資料的基礎手段,巖體結(jié)構(gòu)面參數(shù)定量識別方法、采空區(qū)定性判別標準及巖體破裂程度指標的提出是巖體結(jié)構(gòu)探測的基礎,巖體結(jié)構(gòu)探測方法的建立是核心,三者共同為一個有機的系統(tǒng),構(gòu)成了基于高密度電阻率法的邊坡巖體結(jié)構(gòu)探測方法技術(shù)體系。(5)以馬達嶺滑坡采空區(qū)及上覆巖體結(jié)構(gòu)探測及瀾滄江苗尾水電站傾倒巖體結(jié)構(gòu)探測為例對基于高密度電阻率法的邊坡巖體結(jié)構(gòu)探測方法進行了具體應用。通過實際應用,研究探測方法實際效果與評價指標的實際狀態(tài),根據(jù)評價指標量化標準賦值。在這個基礎上,采用定性分析與定量評價相結(jié)合的基于高密度電阻率法的邊坡巖體結(jié)構(gòu)探測方法對研究區(qū)進行了探測,探測結(jié)果與實際情況較一致。
[Abstract]:The structural characteristics of rock mass are the key factors to control the instability mode of slope. How to find out the structural characteristics of rock mass in slope body effectively? In the absence of adit and rich drilling data, the combination of geophysical prospecting and ground survey is a more effective means. Compared with other geophysical prospecting methods, the high density electrical method has the advantages of low operation difficulty, low cost, high precision and high efficiency. It is more and more widely used in the detection of structural characteristics of deep slope rock mass, but it is mainly used in qualitative interpretation of underground structure, but the quantitative or semi-quantitative interpretation of structural plane and rock mass structure is less. In this case, Based on the high density resistivity method, a set of analysis and evaluation system for slope rock mass structure detection is established. It is very urgent and necessary. In this paper, the detection of rock mass structure in goaf of Maoling coal mine in Guizhou Province and the rock mass structure detection of toppling deformation slope of Miaowei Hydropower Station in Lancang River are taken as examples. The study of electrical characteristics of rock mass rupture degree follows the basic academic thought of combining qualitative analysis with quantitative evaluation. A set of perfect technique and method system for detecting slope rock mass structure is established. The main research results are as follows: (1) A set of high density electrical detection method system suitable for class 鈪，

本文編號：1573554