【正文】 ..............................................................................................................III1 緒論 ................................................................................................................................1 研究的背景和意義 ....................................................................................................1 國(guó)內(nèi)外研究現(xiàn)狀 .........................................................................................................1 深部工程的發(fā)展趨勢(shì) .................................................................................................................1 沿空掘巷上覆巖層活動(dòng)規(guī)律的研究綜述 ..................................................................................2 沿空掘巷護(hù)巷煤柱的研究綜述 ..................................................................................................3 錨桿支護(hù)原理及技術(shù)的研究綜述 ..............................................................................................4 本文研究的內(nèi)容及技術(shù)研究路線(xiàn) .............................................................................5 研究?jī)?nèi)容 ......................................................................................................................................5 研究方法及技術(shù)路線(xiàn) .................................................................................................................62 不同傾角條件下支承壓力分布規(guī)律的數(shù)值模擬研究 ...............................................7 概述 .............................................................................................................................7 FLAC3D 軟件簡(jiǎn)介 .......................................................................................................7 模型的建立及參數(shù)的選取 ........................................................................................8 模型的建立 ..................................................................................................................................8 模擬地質(zhì)條件、煤巖參數(shù)及單元?jiǎng)澐?......................................................................................9 計(jì)算的結(jié)果及分析 ..................................................................................................11 不同傾角側(cè)向支承壓力的模擬結(jié)果 .......................................................................................11 側(cè)支承壓力分布特征數(shù)據(jù)處理 ................................................................................................15 小結(jié) ...........................................................................................................................173 煤層開(kāi)采相似模擬研究 ..............................................................................................19 概述 ...........................................................................................................................19 相似模擬實(shí)驗(yàn)理論 ..................................................................................................19 相似定理 ...................................................................................................................................19 相似準(zhǔn)則 ...................................................................................................................................20 相似材料模擬實(shí)驗(yàn)設(shè)計(jì) ..........................................................................................21 實(shí)驗(yàn)?zāi)康?...................................................................................................................................21 模擬實(shí)驗(yàn)的相似條件 ...............................................................................................................21 相似材料的選取 .......................................................................................................................21 模擬的地質(zhì)條件 .......................................................................................................................21 模型架及相似系數(shù)的確定 .......................................................................................................21 相似材料配比及用量 ...............................................................................................................23 模型的制作 ...............................................................................................................................25 加載 ...........................................................................................................................................25 模型的開(kāi)采與觀測(cè) ..................................................................................................27 實(shí)驗(yàn)結(jié)果及分析 ......................................................................................................29 己 15 煤層開(kāi)采側(cè)向支承壓力分布 ...........................................................................................29 己 15 煤層開(kāi)采巖層幾何特征 ...................................................................................................29 小結(jié) ..........................................................................................................................304 區(qū)段煤柱參數(shù)及巷道支護(hù)方式優(yōu)化 ..........................................................................33 沿空掘巷護(hù)巷煤柱寬度的理論分析 .......................................................................33 沿空掘巷煤柱護(hù)巷巷道礦壓顯現(xiàn) ............................................................................................33 沿空掘巷煤柱力學(xué)環(huán)境的因素 ................................................................................................34 現(xiàn)采用的區(qū)段煤柱參數(shù)、巷道支護(hù)方式的評(píng)價(jià) ...................................................38 區(qū)段煤柱參數(shù)分析 ....................................................................................................................40 沿空掘巷的現(xiàn)場(chǎng)觀測(cè)研究 ......................................................................................40 測(cè)點(diǎn)布置及儀器的使用 ...........................................................................................................40 實(shí)測(cè)結(jié)果與分析 ........................................................................................................................41 回采巷道支護(hù)方式、支護(hù)參數(shù)的分析與優(yōu)化 ......................................................44 錨桿支護(hù)的設(shè)計(jì)思路 ..................................................................................................