發(fā)布時間：2018-03-15 12:51

  本文選題：破碎巖體　切入點：突水潰沙　出處：《中國礦業(yè)大學(xué)》2016年博士論文　論文類型：學(xué)位論文

【摘要】：采動巖體水沙滲流特性研究是關(guān)系煤礦安全的一項重要課題。巖體由于采動引起結(jié)構(gòu)破壞,產(chǎn)生的破碎巖體往往處于圍壓之下。本文自行研制了一套加載設(shè)備相配套的滲透試驗設(shè)備對應(yīng)力作用下破碎巖體變形與水沙滲流特性進(jìn)行研究,取得了如下創(chuàng)新性成果:(1)為了研究應(yīng)力作用下破碎巖體變形與水沙滲流特性,自行研制了一套與加載設(shè)備相匹配的滲流試驗設(shè)備。使破碎巖體能夠在應(yīng)力下發(fā)生流變,研究流變后的破碎巖體的水沙滲流特性。該滲流設(shè)備能模擬圍壓下破碎巖體的流變變形;破碎巖體與沙粒分層,沙粒受水流攪動后形成水沙混合物流入破碎巖體的情況�？蔀橥愒囼炓约跋嚓P(guān)后續(xù)的擴展研究提供參考方法。(2)利用自行研制的應(yīng)力作用下破碎巖體水沙滲流試驗系統(tǒng),研究了不同應(yīng)力水平、不同粒徑級配對破碎巖體流變特性與水沙滲流特性的影響。破碎巖體壓實流變過程中,流變模型的彈模、粘度等參數(shù)是不停的隨時間變化的。根據(jù)破碎巖體流變試驗結(jié)果,基于分?jǐn)?shù)階微積分理論與三參量流變模型,引入分?jǐn)?shù)階Abel粘壺替代牛頓粘壺,獲得了一個新的分?jǐn)?shù)階流變模型,并推導(dǎo)了巖石在恒應(yīng)力條件下的三維蠕變本構(gòu)方程;分析了破碎巖體流變對水沙滲流特性的影響。(3)破碎巖體水沙滲流過程中,一部分沙粒流入破碎巖體后被截留,占據(jù)了部分空隙,改變了破碎巖體的孔隙率。擬合了不同粒徑級配的破碎巖體在兩種滲流組合的情況下,初始孔隙率與滲透率的關(guān)系式;擬合了不同粒徑級配的破碎巖體的潰沙、濾沙能力與破碎巖體初始孔隙率的關(guān)系曲線。對破碎巖體進(jìn)行應(yīng)力加載(流變變形)與位移加載兩種方式使破碎巖體發(fā)生壓縮變形以研究不同的加載方式對破碎巖體水沙滲流特性的影響。(4)當(dāng)破碎巖體中發(fā)生水沙滲流情況時,在一定情況下,沙粒不能夠完全通過破碎巖體,破碎巖體對沙粒的過濾作用進(jìn)而導(dǎo)致破碎巖體骨架屬性變化,破碎巖體的對沙粒的過濾能力是對其滲流特性影響的一項重要因素。根據(jù)試驗結(jié)果提出了考慮滲流長度的破碎巖體篩層模型,并對破碎巖體等效厚度與破碎巖體初始孔隙率的關(guān)系進(jìn)行了研究,給出了建議的計算公式,基于顆粒離散元軟件(PFC)進(jìn)行了破碎巖體水沙滲流數(shù)值模擬。可為破碎巖體水沙滲流災(zāi)害的預(yù)測提供參考。
[Abstract]:The study on seepage characteristics of mining rock mass is an important subject related to coal mine safety. The broken rock mass is often under confining pressure. In this paper, a set of osmotic test equipment with loading equipment is developed to study the deformation of broken rock mass and seepage characteristics of water and sediment under stress. In order to study the deformation of broken rock mass and the seepage characteristics of water and sediment under stress, a set of seepage test equipment matching the loading equipment was developed to make the broken rock mass rheological under stress. The characteristics of water and sediment seepage in fractured rock mass after rheology are studied. The seepage equipment can simulate the rheological deformation of broken rock mass under confining pressure. Sand particles are agitated by water and sand to form a mixture of water and sediment flowing into broken rock mass. It can provide a reference method for the similar test and related extended research. 2) using the self-developed water and sediment seepage test system of broken rock mass under the action of stress. The effects of different stress levels and particle size gradation on the rheological characteristics and seepage characteristics of fractured rock mass are studied. The elastic modulus of rheological model during compaction rheological process of broken rock mass is studied. According to the rheological test results of broken rock mass, based on fractional calculus theory and three-parameter rheological model, fractional Abel clay pot is introduced to replace Newtonian viscosity pot. A new fractional order rheological model is obtained, and the three-dimensional creep constitutive equation of rock under constant stress is derived, and the influence of the rheology of broken rock mass on the seepage characteristics of water and sediment is analyzed. Some of the sand particles were cut off after flowing into the broken rock mass, which occupied part of the void and changed the porosity of the broken rock mass. The relationship between the initial porosity and the permeability of the broken rock mass with different particle size gradation in the case of two kinds of seepage combinations was fitted. The sand collapse of broken rock mass with different particle size gradation is fitted. The relation curve between sand filtration capacity and initial porosity of broken rock mass. Stress loading (rheological deformation) and displacement loading on broken rock mass make the fractured rock mass compress and deform in order to study the different loading ways to break the rock mass. The influence of seepage characteristics of rock mass water and sediment. (4) when water and sediment seepage occurs in broken rock mass, Under certain circumstances, sand particles can not completely pass through the broken rock mass, and the filtration effect of broken rock mass on the sand grain will lead to the change of the property of the broken rock mass skeleton. The filtration ability of broken rock mass to sand particles is an important factor affecting its seepage characteristics. Based on the experimental results, a model of sieve layer of broken rock mass considering seepage length is proposed. The relationship between the equivalent thickness of broken rock mass and the initial porosity of broken rock mass is studied, and the suggested calculation formula is given. Based on the particle discrete element software (PFC), the numerical simulation of water and sediment seepage in broken rock mass is carried out, which can provide a reference for prediction of water and sediment seepage disaster in broken rock mass.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：TU45

【相似文獻(xiàn)】

相關(guān)期刊論文 前9條

1 梁健偉;房營光;;極細(xì)顆粒黏土滲流特性試驗研究[J];巖石力學(xué)與工程學(xué)報;2010年06期

2 左恒;吳愛祥;王貽明;江懷春;;地電場對裂隙巖塊中溶浸液滲流特性影響的研究[J];巖石力學(xué)與工程學(xué)報;2007年05期

3 速寶玉，詹美禮，，張祝添;充填裂隙滲流特性實驗研究[J];巖土力學(xué);1994年04期

4 李順才;陳占清;繆協(xié)興;劉玉;;飽和破碎砂巖隨時間變形-滲流特性試驗研究[J];采礦與安全工程學(xué)報;2011年04期

5 蔣宇靜;李博;王剛;李術(shù)才;;巖石裂隙滲流特性試驗研究的新進(jìn)展[J];巖石力學(xué)與工程學(xué)報;2008年12期

6 童剛強;李東慶;張坤;常發(fā);;立方排列球體層滲流特性數(shù)值模擬研究[J];水利與建筑工程學(xué)報;2010年04期

7 高恩恩;;汾河太原城區(qū)治理南延伸段滲流特性試驗研究[J];山西科技;2011年06期

8 楊金保;馮夏庭;潘鵬志;;考慮應(yīng)力歷史的巖石單裂隙滲流特性試驗研究[J];巖土力學(xué);2013年06期

9 ;[J];;年期

相關(guān)會議論文 前1條

1 楊悅;蒲春生;王萍;;低頻脈沖波對儲層巖心滲流特性影響規(guī)律研究[A];第九屆全國滲流力學(xué)學(xué)術(shù)討論會論文集（一）[C];2007年

相關(guān)博士學(xué)位論文 前3條

1 陳家瑞;應(yīng)力作用下破碎巖體變形與水沙滲流特性試驗研究[D];中國礦業(yè)大學(xué);2016年

2 梁健偉;軟土變形和滲流特性的試驗研究與微細(xì)觀參數(shù)分析[D];華南理工大學(xué);2010年

3 孫運周;低維磁性系統(tǒng)滲流特性、螺旋序和相變動力學(xué)的研究[D];華中科技大學(xué);2009年

相關(guān)碩士學(xué)位論文 前7條

1 許大洋;基于COMSOL的煤礦頂板運移規(guī)律及滲流特性研究[D];廣西大學(xué);2016年

2 吳迪;水合物生成分解過程相分辨和滲流特性研究[D];大連理工大學(xué);2016年

3 丁凱;電場作用下軟土滲流特性的試驗與微觀理論分析[D];華南理工大學(xué);2011年

4 楊瓊;低滲透砂巖滲流特性試驗研究[D];清華大學(xué);2004年

5 關(guān)新強;特高碾壓混凝土重力壩滲流特性及滲控措施研究[D];河海大學(xué);2007年

6 于本昌;基于蒙特卡羅隨機裂隙的巖溶水工隧洞穩(wěn)定性及滲流特性研究[D];西南交通大學(xué);2015年

7 陳栶;巖溶與裂隙交叉滲流特性試驗及數(shù)值模擬研究[D];河海大學(xué);2006年

本文編號：1616114