基于数值模拟的软岩巷道底鼓机理实验研究
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摘要
巷道底鼓是煤矿开采过程中面临的主要难题之一。针对底板较软、受下部废弃老巷影响强烈的丰达煤矿-340轨道巷,通过FLAC~(3D)数值模拟软件分别验证巷道卧底留卸压槽、底板注浆加固、卧底卸压槽+浇灌混凝土+注浆管加固相耦合联合支护3种巷道底鼓控制技术方法的应用效果。选取卸压浇砼注浆耦合支护技术治理该巷道底鼓,工程实践表明:该项技术能将巷道围岩自承载能力更大限度利用,并挖掘更深部围岩的强度,使底鼓量较原有支护减少89.5%,底鼓治理效果显著。
Floor heave of roadway is one of the main problems in the process of coal mining.Aiming at soft floor and strong influence of abandoned old roadway at the bottom of -340 track roadway in Fengda Coal Mine,FLAC~(3D) numerical simulation software was used to verify the application effect of control technologies in roadway floor heave,namely,the undercover pressure relief groove,the bottom grouting reinforcement,as well as the coupling combination support of undercover pressure relief groove,pouring concrete and grouting pipe reinforcement.The grouting coupling support technology of cast concrete under pressure relief was selected to control the floor heave.Engineering practice showed that this technology can make full use of the self-bearing capacity of roadway surrounding rock and excavate the strength of deeper surrounding rock,so that the volume of floor heave was reduced by 89.5% compared with the original support,and the control effect of floor heave was remarkable.
Floor heave of roadway is one of the main problems in the process of coal mining.Aiming at soft floor and strong influence of abandoned old roadway at the bottom of -340 track roadway in Fengda Coal Mine,FLAC~(3D) numerical simulation software was used to verify the application effect of control technologies in roadway floor heave,namely,the undercover pressure relief groove,the bottom grouting reinforcement,as well as the coupling combination support of undercover pressure relief groove,pouring concrete and grouting pipe reinforcement.The grouting coupling support technology of cast concrete under pressure relief was selected to control the floor heave.Engineering practice showed that this technology can make full use of the self-bearing capacity of roadway surrounding rock and excavate the strength of deeper surrounding rock,so that the volume of floor heave was reduced by 89.5% compared with the original support,and the control effect of floor heave was remarkable.
引文
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[13]刘泉声,刘学伟,黄兴,等.深井软岩破碎巷道底臌原因及处置技术研究[J].煤炭学报,2013,38(4):566-571.
[14]王平虎,王春.晋城区域兼并重组矿井沿空留巷技术应用研究[J].煤矿开采,2017,22(2):31-43.
[15]董云龙.丰达煤矿-340大巷底鼓控制技术研究[D].邯郸:河北工程大学,2016.
[2]周冬磊,王连国,王占胜,等.大断面软岩巷道底鼓机理及控制对策研究[J].矿业研究与开发,2012,32(1):59-63.
[3]黄小朋,张鹏鹏,刘中熙,等.沿空留巷底鼓机理及钢排桩法防治技术研究[J].煤矿安全,2018,49(5):159-166.
[4]崔魏,陈威,崔峰.深部高应力巷道底鼓大变形控制技术研究[J].煤炭工程,2013,11:37-39.
[5]神文龙,柏建彪,于洋,等.泥质底板动压巷道底鼓机理及控制技术研究[J].煤炭科学技术,2014,42(3):28-31.
[6]李新旺,孙立辉,杨本生,等.巷道底板软弱夹层厚度对底鼓影响的模拟分析[J].采矿与安全工程学报,2017,34(3):504-510.
[7]李宗岑.教学三矿轨道巷底鼓机理及控制技术研究[D].焦作:河南理工大学,2011.
[8]孙守孝,孙志勇,郭相平.寺河矿大采高工作面动压影响下巷道底鼓防治技术研究[J].煤炭工程,2013(3):41-43.
[9]黄胜,李自强.袁店一井大断面软岩上山底鼓综合治理技术[J].煤矿安全,2012,43(4):34-37.
[10]李守国,杜泽生,王成,等.回采巷道采动期间底鼓治理方法[J].煤矿安全,2012,43(8):180-182.
[11]郭建伟.深井节理化围岩巷道破坏机理及控制技术[J].煤炭学报,2012,37(9):1559-1563.
[12]张辉,康红普,徐佑林.深井巷道底板预应力锚索快速加固技术研究[J].煤炭科学技术,2013,41(4):16-19.
[13]刘泉声,刘学伟,黄兴,等.深井软岩破碎巷道底臌原因及处置技术研究[J].煤炭学报,2013,38(4):566-571.
[14]王平虎,王春.晋城区域兼并重组矿井沿空留巷技术应用研究[J].煤矿开采,2017,22(2):31-43.
[15]董云龙.丰达煤矿-340大巷底鼓控制技术研究[D].邯郸:河北工程大学,2016.
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