基于FLAC~(3D)的大采高工作面过向斜构造的矿压显现规律
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摘要
为了深入了解大采高工作面围岩与支架的关系,采用FLAC~(3D)数值模拟,研究了工作面不同开采阶段,不同工作面推进下垂直应力场分布、垂直位移场以及塑性破坏场。研究而得出:当工作面初采阶段时,在工作面5～15 m,应力易产生集中,并随着工作面的继续推进,应力集中程度也逐渐增大,采场顶板的下沉量与围岩破坏范围也逐渐增大。工作面过向斜构造阶段:煤壁前方的垂直应力、垂直位移以及塑性区破坏范围都发生了明显的变化,矿压显现剧烈,煤壁片帮,直接顶冒落现象严重。上述研究为控制采场围岩稳定提供了技术基础。
In order to understand the relationship between the surrounding rock and the support of the large mining face,the vertical stress field distribution,the vertical displacement field and the plastic damage field of the working face are studied by FLAC3 Dnumerical simulation. When the working face is in the initial stage,the stress is concentrated in the working face of 5 ～ 15 m,and the stress concentration gradually increases with the continuous face of the working face,and the sinking amount of the roof and the surrounding rock are destroyed,the scope is gradually increasing. The vertical stress,vertical displacement and the damage range of the plastic zone in the front of the coal wall are obviously changed,the pressure of the coal strata is severe,the wall is directly affected,and the direct roof is serious. Field rock stability to provide technical basis.
In order to understand the relationship between the surrounding rock and the support of the large mining face,the vertical stress field distribution,the vertical displacement field and the plastic damage field of the working face are studied by FLAC3 Dnumerical simulation. When the working face is in the initial stage,the stress is concentrated in the working face of 5 ～ 15 m,and the stress concentration gradually increases with the continuous face of the working face,and the sinking amount of the roof and the surrounding rock are destroyed,the scope is gradually increasing. The vertical stress,vertical displacement and the damage range of the plastic zone in the front of the coal wall are obviously changed,the pressure of the coal strata is severe,the wall is directly affected,and the direct roof is serious. Field rock stability to provide technical basis.
引文
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[2]白国良.基于FLAC3D的采动岩体等效连续介质流固耦合模型及应用[J].采矿与安全工程学报,2010,27(1):110-114.Bai Guoliang. Fluid-solid coupling model and application of equivalent continuous medium based on FLAC3D[J]. Journal of Mining&Safety Engineering,2010,27(1):110-114.
[3]汤雪唯,张向阳.深井跨采巷道围岩应力分布及变形规律模拟研究[J].煤炭技术,2010,29(3):189-192.Tang Xuewei,Zhang Xiangyang. Simulation study on stress distribution and deformation law of surrounding rock in deep mine crossing roadway[J]. Coal Technology,2010,29(3):189-192.
[4]房智恒,王李管,熊张友.基于Micromine-FLAC3D耦合技术的金属矿采矿扰动影响分析[J].采矿与安全工程学报,2012,29(6):870-875.Fang Zhiheng,Wang Liguan,Xiong Zhangyou. Analysis of mining disturbance of metal mine based on Micromine-FLAC3Dcoupling technique[J]. Journal of Mining&Safety Engineering,2012,29(6):870-875.
[5]段军,杨鹏,张子良,等.基于FLAC3D对金庄矿沿空掘巷区段煤柱合理留设的研究[J].煤炭技术,2015,34(12):34-40.Duan Jun,Yang Peng,Zhang Ziliang,et al. Study on reasonable settlement of coal pillar in roadway driving along goaf in Jinzhuang Coal Mine based on FLAC3D[J]. Coal Technology,2015,34(12):34-40.
[6]曹树刚,徐阿猛,刘延保,等.基于灰色关联分析的煤矿安全综合评价[J].采矿与安全工程学报,2007,24(2):141-145.Cao Shugang,Xu Ameng,Liu Yanbao,et al. Comprehensive evaluation of coal mine safety based on gray relational analysis[J]. Journal of Mining&Safety Engineering,2007,24(2):141-145.
[7]刘全明.浅埋综采工作面矿压显现的推进速度效应分析[J].煤炭科学技术,2010,38(7):24-26.Liu Quanming. Analysis on the propulsion speed effect of ground pressure in shallow buried fully-mechanized face[J]. Coal Science and Technology,2010,38(7):24-26.
[8]宋亚亚,宋中记.基于UDEC的坚硬顶板工作面矿压显现规律研究[J].能源与环保,2017,39(7):234-238.Song Yaya,Song Zhongji. Study on strata behavior regularity of hard roof face based on UDEC[J]. China Energy and Environmental Protection,2017,39(7):234-238.
[9]郑飞,王来斌,朱启象,等.基于FLAC3D的煤层底板采动应力分布及破坏深度模拟研究[J].煤炭技术,2015,34(2):106-108.Zheng Fei,Wang Laibin,Zhu Qixiang,et al. Simulation study on stress distribution and failure depth of coal seam floor based on FLAC3D[J]. Coal Technology,2015,34(2):106-108.
[10]梁泽鹏,姚多喜,董旭,等.基于FLAC3D的“两带”高度预测数值模拟[J].中州煤炭,2013(2):14-16.Liang Zepeng,Yao Duoxi,Dong Xu,et al. Numerical simulation of"Two-belt"height prediction based on FLAC3D[J]. Zhongzhou Coal,2013(2):14-16.
[11]卢鑫,王广顺.基于充填法与冒落法开采的矿压显现规律研究[J].煤炭科学技术,2013,41(1):60-62.Lu Xin,Wang Guangshun. Study on strata behavior regularity based on filling method and buried method[J]. Coal Science and Technology,2013,41(1):60-62.
[12]张艳军,李正虎,李军.浅埋煤层大采高综采面区段煤柱留设宽度研究[J].中州煤炭,2017(5):146-149.Zhang Yanjun,Li Zhenghu,Li Jun. Study on settlement width of coal pillar in fully-mechanized face with large mining height in shallow coal seam[J]. Zhongzhou Coal,2017(5):146-149.
[13]张瑞鹏,任文强.基于FLAC模型下对8506工作面矿压显现规律的模拟[J].山东煤炭科技,2017(1):44-45.Zhang Ruipeng,Ren Wenqiang. Simulation of ground pressure behavior in 8506 face based on FLAC model[J]. Shandong Coal Science and Technology,2017(1):44-45.
[14]张晓涛.基于FLAC3D的深部巷道支护围岩稳定性研究[J].能源与环保,2018,40(1):183-185,189.Zhang Xiaotao. Study on surrounding rock stability of deep roadway supporting based on FLAC3D[J]. China Energy and Environmental Protection,2018,40(1):183-185,189.
[15]韩新杰.基于FLAC3D的工作面副巷锚杆支护参数试验分析[J].山东煤炭科技,2017(5):20-21.Han Xinjie. Test and analysis of bolt support parameters of roadway based on FLAC3D[J]. Shandong Coal Science and Technology,2017(5):20-21.
[16]任智敏,王神虎.冲击地压倾向煤层矿压显现规律数值模拟[J].煤矿安全,2011,42(11):137-139.Ren Zhimin,Wang Shenhu. Numerical simulation of strata behavior regularity in coal seam with induced pressure[J]. Safety in Coal Mines,2011,42(11):137-139.
[17]陈小飞,白群科.基于FLAC3D的煤层回采覆岩破坏高度数值模拟研究[J].山东煤炭科技,2014(5):136-138.Chen Xiaofei,Bai Qunke. Numerical simulation study on damage height of coal seam mining based on FLAC3D[J]. Shandong Coal Science and Technology,2014(5):136-138.
[18]撒占友,王勇,秦波.基于FLAC3D的煤矿冲击地压深度模拟研究[J].煤矿安全,2011,42(6):22-25.Sa Zhanyou,Wang Yong,Qin Bo. Simulation study on ground pressure depth of coal mine based on FLAC3D[J]. Safety in Coal Mines,2011,42(6):22-25.