水浸基底排土場邊坡破壞機理及預(yù)控技術(shù)研究
本文選題:水浸基底 + 排土場邊坡。 參考:《中國礦業(yè)大學(xué)(北京)》2015年博士論文
【摘要】:陰灣排土場是黑岱溝露天煤礦的外排土場,受附近礦井排水影響,其南部大好賴溝溝底形成一面積約24萬m2、總水量約161.53萬m3的積水坑,直接影響其排棄空間,并威脅南部大準(zhǔn)鐵路線和排土場西部的安全。鑒于此,在分析總結(jié)該區(qū)域歷年研究成果的基礎(chǔ)上,采用鉆探和地質(zhì)調(diào)查等方法掌握該區(qū)域的工程地質(zhì)和水文地質(zhì)條件,通過室內(nèi)試驗以及工程類比方法確定了巖土體的物理力學(xué)參數(shù),開展了水浸基底排土場破壞模式研究,采用相似模擬試驗和FLAC3D等研究了水浸基底排土場邊坡的破壞機理,并采用極限平衡方法進行了排土場的穩(wěn)定性分析;結(jié)合工程地質(zhì)和水文地質(zhì)條件和排土工藝,依據(jù)能量守恒理論對拋石擠淤技術(shù)中的有效深度進行了計算,并利用PFC對拋石擠淤的過程進行了數(shù)值模擬,驗證了拋石擠淤方案的合理性;在實施拋石擠淤技術(shù)的同時進行了GPS監(jiān)測,位移監(jiān)測結(jié)果表明,排土場邊坡的變形在安全范圍以內(nèi),排土場的安全得到了保障。
[Abstract]:The Yingwan dump is the outer dump of Heidaigou opencast coal mine. Affected by the drainage of nearby mines, the bottom of the Daholaigou in the south of the mine has formed a water pit with an area of about 240000 m2 and a total water volume of about 1.6153 million m3, which directly affects the drainage space. It also threatens the security of the southern quasi-railway lines and the west of the dump. In view of this, on the basis of analyzing and summarizing the research results of the region over the years, the engineering geology and hydrogeological conditions of the region are mastered by drilling and geological survey methods. The physical and mechanical parameters of rock and soil were determined by laboratory test and engineering analogy method, and the failure mode of flooded foundation dump was studied. The failure mechanism of the slope was studied by similar simulation test and FLAC3D. The stability of the dump is analyzed by using the limit equilibrium method, and the effective depth of the technique is calculated according to the energy conservation theory, combined with the engineering geology and hydrogeological conditions and the draining technology. A numerical simulation is carried out to verify the reasonableness of the scheme, and GPS monitoring is carried out at the same time, and the displacement monitoring results show that the displacement monitoring results are as follows: (1) using PFC to simulate the desilting process of riprap, the rationality of the scheme is verified, and the displacement monitoring results show that, The deformation of the dump slope is within the safe range, and the safety of the dump is guaranteed.
【學(xué)位授予單位】:中國礦業(yè)大學(xué)(北京)
【學(xué)位級別】:博士
【學(xué)位授予年份】:2015
【分類號】:TD824.8
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