【摘要】：通過對(duì)淮南礦業(yè)集團(tuán)張集礦1611(3)大采高工作面不同推進(jìn)速度下的礦壓實(shí)測(cè),研究不同推進(jìn)速度下的礦壓顯現(xiàn)規(guī)律,實(shí)測(cè)發(fā)現(xiàn)：提高推進(jìn)速度,周期來壓步距、來壓持續(xù)長度增幅明顯,工作面超前應(yīng)力峰值增大,影響范圍變小,形成應(yīng)力集中現(xiàn)象,片幫冒頂發(fā)生情況有所減低。運(yùn)用材料力學(xué)、巖石力學(xué)相關(guān)知識(shí),推導(dǎo)了采煤面上覆關(guān)鍵層的判別條件、巖梁荷載,以“關(guān)鍵層理論”為指導(dǎo),分析1611(3)綜采面上覆巖層結(jié)構(gòu),再結(jié)合損傷力學(xué)、大采高采場(chǎng)關(guān)鍵層相關(guān)研究成果,分析1611(3)大采高工作面在不同推進(jìn)速度下采場(chǎng)上覆關(guān)鍵層“懸臂梁”結(jié)構(gòu)的垮落運(yùn)動(dòng)型態(tài),提出：工作面慢速推進(jìn)時(shí)“短懸臂一砌體梁”交替垮落式和快速推進(jìn)時(shí)“長懸臂”直接垮落式；慢速推進(jìn)時(shí)周期來壓步距和來壓持續(xù)長度變小,來壓步距呈現(xiàn)一大一小變化,具有明顯的非均勻性；快速推進(jìn)時(shí)“長懸臂梁”直接垮落式,造成工作面周期來壓步距和來壓持續(xù)長度的加大。采用FLAC3D數(shù)值模擬軟件,以1611(3)大采高工作面為工程背景,通過改變單位時(shí)間截深模擬不同推進(jìn)速度下采場(chǎng)圍巖應(yīng)力、塑性破壞區(qū)及關(guān)鍵層下沉運(yùn)動(dòng),模擬結(jié)果與現(xiàn)場(chǎng)實(shí)測(cè)基本一致。針對(duì)大采高工作面末端回撤易壓架問題,在對(duì)1611(3)工作面不同推進(jìn)速度的礦壓規(guī)律的研究基礎(chǔ)上,分析先采用了降低推進(jìn)速度減小頂板來壓對(duì)采面的影響,再確定在合理的停采線位置(隔離煤柱)進(jìn)行停采讓壓,避免工作面與回撤通道貫通時(shí)處于頂板來壓狀態(tài)而阻礙工作面安全回撤。
[Abstract]:Through measuring the rock pressure of Zhangji 1611 (3) large mining face of Huainan Mining Group under different advancing speed, the paper studies the regularity of mine pressure appearance under different propelling speed. The measured results show that: to increase the speed of propulsion, the interval between periodic pressure and pressure is increased. The continuous length of pressure increases obviously, the peak value of leading stress increases, the influence range becomes smaller, the phenomenon of stress concentration is formed, and the occurrence of roof fall is reduced. Based on the relevant knowledge of material mechanics and rock mechanics, the distinguishing conditions and the load of rock beam on the coal mining surface are derived. Under the guidance of "critical layer theory", the overburden structure of 1611 (3) fully mechanized coal face is analyzed, and the damage mechanics is combined. Based on the related research results of key strata in large mining height stope, the collapse motion patterns of "cantilever beam" structure in 1611 (3) large mining face overlying key strata under different advancing speeds are analyzed. It is proposed that the "short cantilever masonry beam" collapses alternately when the working face is moving slowly and the "long cantilever" directly collapses in the case of rapid propulsion, and the interval between the periodic pressure and the continuous pressure becomes smaller, and the pressure step distance changes greatly and slightly during the slow advance. The "long cantilever beam" directly collapses during the rapid advance, which results in the increase of the step distance and the continuous length of the working face. Using FLAC3D numerical simulation software, taking 1611 (3) large mining face as the engineering background, the stress of surrounding rock, the plastic failure zone and the subsidence of key strata are simulated by changing the unit time depth at different propelling velocities. The simulation results are in good agreement with the field measurements. Aiming at the problem of retreating easy pressure frame at the end of large mining face, on the basis of study on the law of mine pressure of 1611 (3) working face with different advancing speed, this paper first analyzes the influence of reducing pushing speed and reducing roof pressure on mining face. Finally, it is determined that stoppage pressure should be carried out at a reasonable stoppage position (isolating coal pillar) to avoid the roof pressure state when the face is connected with the withdrawal passage, thus hindering the safe withdrawal of the working face.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD323

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 方恩才;;不同推進(jìn)速度下覆巖移動(dòng)規(guī)律數(shù)值模擬研究[J];能源技術(shù)與管理;2009年06期

2 郝海金,張勇,袁宗本;大采高采場(chǎng)整體力學(xué)模型及采場(chǎng)礦壓顯現(xiàn)的影響[J];礦山壓力與頂板管理;2003年S1期

3 王偉;夏緊;;快推綜采面礦壓顯現(xiàn)規(guī)律與控制[J];礦山壓力與頂板管理;2005年04期

4 余忠林;涂敏;;大采高工作面沿空掘巷合理位置模擬與應(yīng)用[J];采礦與安全工程學(xué)報(bào);2006年02期

5 王曉振;鞠金峰;許家林;;神東淺埋綜采面末采段讓壓開采原理及應(yīng)用[J];采礦與安全工程學(xué)報(bào);2012年02期

6 鞠金峰;許家林;朱衛(wèi)兵;王慶雄;郝憲杰;;7.0m支架綜采面礦壓顯現(xiàn)規(guī)律研究[J];采礦與安全工程學(xué)報(bào);2012年03期

7 李德海，王長江，崔洪瑞，袁愛國;地表和巖層變形與工作面推進(jìn)速度的關(guān)系[J];礦山壓力與頂板管理;1995年Z1期

8 夏蒙棼，，韓聞生，柯孚久，白以龍;統(tǒng)計(jì)細(xì)觀損傷力學(xué)和損傷演化誘致突變[J];力學(xué)進(jìn)展;1995年01期

9 谷松山;侯社偉;;綜放工作面推進(jìn)速度對(duì)端面穩(wěn)定性的影響[J];煤;2011年07期

10 毛德兵,康立軍;大采高綜放開采及其應(yīng)用可行性分析[J];煤礦開采;2003年01期

本文編號(hào)：2198612