工作面開采正斷層活化規(guī)律及采動應(yīng)力演化特征
[Abstract]:Fault is a common and influential geological structure in coal mining.Fault destroys the continuous and integral state of rock strata,abnormal stress distribution near it,mining effect is very prominent,it is very easy to induce dynamic disasters,and has a great influence on coal mining design and safety production.This paper presents theoretical calculation,analog material simulation test and numerical simulation. The numerical simulation method is used to study the migration law of the two sides of the fault, the evolutionary characteristics of mining stress and the law of fault activation during the mining of the normal faults in the upper and lower faces. The main results are verified by the field microseismic events. The main research results are as follows: 1) The fault zone cuts the integrity of the roof and floor strata, and the barrier effect of mining stress is remarkable. It is easy to form a high stress concentration area of the fault coal pillar; when the footwall is advancing toward the normal fault, there is a sudden increase in the supporting stress, which causes the plastic failure of the fault coal pillar and releases a large amount of elastic energy; when the footwall is advancing toward the normal fault, the supporting stress increases gently, and part of the stress can be transferred to the downwall during the advancing process. It is difficult to form stable articulated structure near the fault during mining, the ability of transmitting load to the wall is weak, the fault barrier effect is relatively strong, and the abutment stress in the coal pillar of the fault increases abruptly. 2) The stress change of the fault plane has obvious space-time characteristics. On the same fault plane, the sensitivity of shear stress and normal stress affected by mining is different. Normal stress is first affected, then shear stress changes. 3) According to numerical simulation and similar material simulation, the danger of fault activation is the greatest before and after the normal fault is crossed in the lower face, and the movement of overlying rock in the two sides is the most violent. Panyi slips along the fault plane as a whole, and the basic roof of the hanging wall is easy to fall down during the period of 20-30 m after passing the fault. With the working face advancing toward the fault, the high-level fault is first affected by mining, and then propagates toward both ends of the fault in the vertical direction. Compared with the upper wall mining, the mining stress of the lower wall face has a sudden increase point, the activation time of the fault is earlier, and the activation period of the fault is two. 5) Fault dip angle and mining height have greater influence on mining stress and fault activation in front of coal wall, and the influence of fault drop is smaller.
【學(xué)位授予單位】:山東科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TD82
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 高琳;蔣金泉;張培鵬;王普;柳研青;;工作面向正斷層推進(jìn)支承應(yīng)力演化規(guī)律[J];煤礦安全;2017年01期
2 張培森;李凱;王浩;苗旺;趙仕鈞;闞忠輝;;逆斷層兩盤依次回采誘發(fā)其應(yīng)力變化規(guī)律的試驗(yàn)分析[J];煤礦安全;2016年11期
3 徐傳偉;蔣金泉;王普;張培鵬;孔朋;張國龍;劉緒峰;;逆斷層下盤不同采高工作面支承應(yīng)力演化規(guī)律研究[J];中國煤炭;2016年08期
4 代進(jìn);蔣金泉;;上下盤開采順序?qū)鄬用褐蓜討?yīng)力的影響[J];采礦與安全工程學(xué)報;2016年01期
5 蔣金泉;武泉林;曲華;;硬厚巖層下逆斷層采動應(yīng)力演化與斷層活化特征[J];煤炭學(xué)報;2015年02期
6 田昊豐;李鐵;;不同開挖引起斷層活化的數(shù)值模擬對比分析[J];現(xiàn)代礦業(yè);2015年01期
7 蔣金泉;武泉林;曲華;;硬厚覆巖正斷層附近采動應(yīng)力演化特征[J];采礦與安全工程學(xué)報;2014年06期
8 李守國;呂進(jìn)國;姜耀東;姜文忠;;逆斷層不同傾角對采場沖擊地壓的誘導(dǎo)分析[J];采礦與安全工程學(xué)報;2014年06期
9 呂進(jìn)國;姜耀東;李守國;任蘇迪;姜文忠;張占存;;巨厚堅硬頂板條件下斷層誘沖特征及機(jī)制[J];煤炭學(xué)報;2014年10期
10 郭玲莉;;斷層失穩(wěn)滑動瞬態(tài)過程的實(shí)驗(yàn)觀測與分析[J];國際地震動態(tài);2014年07期
相關(guān)博士學(xué)位論文 前3條
1 馬曉靜;正斷層發(fā)生地震的動力學(xué)過程數(shù)值模擬研究[D];中國地震局地質(zhì)研究所;2012年
2 王濤;斷層活化誘發(fā)煤巖沖擊失穩(wěn)的機(jī)理研究[D];中國礦業(yè)大學(xué)(北京);2012年
3 薛霆哠;大尺度斷層活動數(shù)值模擬及地震學(xué)研究[D];中國科學(xué)技術(shù)大學(xué);2008年
相關(guān)碩士學(xué)位論文 前10條
1 史應(yīng)恩;采動影響下斷層應(yīng)力分布與活化規(guī)律研究[D];湖南科技大學(xué);2016年
2 蔡勝海;FLAC3D斷層模擬中接觸面法與弱化法的研究及應(yīng)用[D];中國礦業(yè)大學(xué);2016年
3 謝建敏;采動誘發(fā)斷層活化規(guī)律及微震監(jiān)測研究[D];江西理工大學(xué);2015年
4 張寧博;斷層沖擊地壓發(fā)生機(jī)制與工程實(shí)踐[D];煤炭科學(xué)研究總院;2014年
5 張娟;山東省煤炭資源開采現(xiàn)狀分析與開采速度模型優(yōu)化研究[D];山東科技大學(xué);2011年
6 張群;采動誘發(fā)斷層活化的數(shù)值模擬及微震監(jiān)測研究[D];河南理工大學(xué);2011年
7 李成成;綜放開采斷層應(yīng)力分布特征與沖擊危險評價研究[D];山東科技大學(xué);2010年
8 薛志鵬;斷層活化導(dǎo)致井巷破壞的數(shù)值模擬分析[D];河南理工大學(xué);2010年
9 賈曉亮;基于FLAC~(3D)的斷層數(shù)值模擬及其應(yīng)用[D];河南理工大學(xué);2010年
10 孫文斌;斷層對底板突水的作用影響研究[D];山東科技大學(xué);2006年
,本文編號:2194506
本文鏈接:http://sikaile.net/kejilunwen/kuangye/2194506.html