高渗压下砂砾层巷道变形稳定性分析
|
摘要
为了获得高渗压对西部矿区中生代砂砾层巷道变形、稳定性的影响规律,通过理论分析与数值模拟的方法探讨了渗流作用下围岩变形特征及巷道失稳致灾的原因,得到了渗压影响下的巷道围岩变形解及塑性区半径解.分析结果表明:外部渗透压力与砂砾层巷道围岩的变形近似呈线性关系,高压渗流对巷道顶板及帮部的变形、稳定性影响较显著;围岩产生较大变形后难以形成自平衡拱,同时,顶部水头压力较高,进一步增加了顶板下沉量,从而导致顶板松散岩体滑移、垮落,产生冒顶灾害.
In order to obtain the influence law of high osmotic pressure on the deformation and stability of the Mesozoic sand-gravel stratum in the western mining area,through the theoretical analysis and numerical simulation method,the deformation results of the surrounding rock under the seepage and the cause of the instability of the roadway are discussed. The deformation of the surrounding rock and the radius solution of the plastic zone under the influence of seepage pressure are obtained. The external seepage pressure is approximately linear with the deformation of the shallow surrounding rock in the sandy-gravel stratum,and the high seepage pressure has significant effects on the deformation and stability of the roof and sidewalls. After the large deformation of the surrounding rock occurs,it is difficult to form a balanced arch. At the same time,the high water head pressure at the top and the large flow further increase the roof subsidence,which leads to the slip and collapse of loose rock mass in the roof,or the disaster of roof falling.
In order to obtain the influence law of high osmotic pressure on the deformation and stability of the Mesozoic sand-gravel stratum in the western mining area,through the theoretical analysis and numerical simulation method,the deformation results of the surrounding rock under the seepage and the cause of the instability of the roadway are discussed. The deformation of the surrounding rock and the radius solution of the plastic zone under the influence of seepage pressure are obtained. The external seepage pressure is approximately linear with the deformation of the shallow surrounding rock in the sandy-gravel stratum,and the high seepage pressure has significant effects on the deformation and stability of the roof and sidewalls. After the large deformation of the surrounding rock occurs,it is difficult to form a balanced arch. At the same time,the high water head pressure at the top and the large flow further increase the roof subsidence,which leads to the slip and collapse of loose rock mass in the roof,or the disaster of roof falling.
引文
[1]程爱国,彭苏萍.西部地区煤炭资源潜力综合评价与规划研究[J].西安科技学院学报,2000,20(s1):7-13.
[2]陈宪,李宇昌,廖有炜.准噶尔盆地及其周边地区中生代成煤及大地构造梗概[J].新疆大学学报(自然科学版),2004,21(3):312-316.
[3]袁越.沙吉海矿区中生代砂砾层特性及其支护对策[D].北京:中国矿业大学(北京),2013.
[4]孙礼文.东北地区南部中生代含煤地层及其特征[J].东北煤炭技术,1995(3):19-25.
[5]邓维国,申建红,乔光磊.西部地区煤矿建井存在的一些问题思考[J].建井技术,2010,31(4):29-33.
[6]苗河根.第三系富水高压砂砾层人造围岩法凿井工艺的研究与实践[J].建井技术,2009,29(4):24-26.
[7]徐智敏,高尚,孙亚军,等.西部典型侏罗系富煤区含水介质条件与水动力学特征[J].煤炭学报,2017,42(2):444-451.
[8]荣传新,程桦.地下水渗流对巷道围岩稳定性影响的理论解[J].岩石力学与工程学报,2004,23(5):741-744.
[9]李宗利,任青文,王亚红.考虑渗流场影响深埋圆形隧洞的弹塑性解[J].岩石力学与工程学报,2004,23(8):1291-1295.
[10]高召宁,孟祥瑞,付志亮.二向不等地压条件下高水压区隧道稳定性分析[J].铁道工程学报,2013(11):62-68.
[11]师文豪,杨天鸿,刘洪磊,等.矿山岩体破坏突水非达西流模型及数值求解[J].岩石力学与工程学报,2016,35(3):446-455.
[12]李术才,平洋,王者超,等.基于离散介质流固耦合理论的地下石油洞库水封性和稳定性评价[J].岩石力学与工程学报,2012,31(11):2161-2170.
[13]张农,许兴亮,李桂臣.巷道围岩裂隙演化规律及渗流灾害控制[J].岩石力学与工程学报,2009,28(2):330-335.
[14]张科学,黄曾华,张金虎,等.高压渗流水作用下泥岩巷道破坏特征及失稳机理[J].煤炭科学技术,2015,43(11):1-5.
[15]陈仲颐,周景星.土力学[M].北京:清华大学出版社,1990.
[16]李广信,张丙印,于玉贞.土力学(第2版)[M].北京:清华大学出版社,2013.
[17]王秀英.岩溶隧道堵水限排衬砌外水压力及结构设计研究[D].北京:北京交通大学,2005.
[18]徐芝纶.弹性力学(第五版上下册)[M].北京:高等教育出版社,2016.
[19]谢贻权,林钟祥,丁皓江.弹性力学[M].杭州:浙江大学出版社,1988.
[20]李敬元,李子丰.渗流作用下井筒周围岩石内弹塑性应力分布规律及井壁稳定条件[J].工程力学,1997,14(1):131-137.
[2]陈宪,李宇昌,廖有炜.准噶尔盆地及其周边地区中生代成煤及大地构造梗概[J].新疆大学学报(自然科学版),2004,21(3):312-316.
[3]袁越.沙吉海矿区中生代砂砾层特性及其支护对策[D].北京:中国矿业大学(北京),2013.
[4]孙礼文.东北地区南部中生代含煤地层及其特征[J].东北煤炭技术,1995(3):19-25.
[5]邓维国,申建红,乔光磊.西部地区煤矿建井存在的一些问题思考[J].建井技术,2010,31(4):29-33.
[6]苗河根.第三系富水高压砂砾层人造围岩法凿井工艺的研究与实践[J].建井技术,2009,29(4):24-26.
[7]徐智敏,高尚,孙亚军,等.西部典型侏罗系富煤区含水介质条件与水动力学特征[J].煤炭学报,2017,42(2):444-451.
[8]荣传新,程桦.地下水渗流对巷道围岩稳定性影响的理论解[J].岩石力学与工程学报,2004,23(5):741-744.
[9]李宗利,任青文,王亚红.考虑渗流场影响深埋圆形隧洞的弹塑性解[J].岩石力学与工程学报,2004,23(8):1291-1295.
[10]高召宁,孟祥瑞,付志亮.二向不等地压条件下高水压区隧道稳定性分析[J].铁道工程学报,2013(11):62-68.
[11]师文豪,杨天鸿,刘洪磊,等.矿山岩体破坏突水非达西流模型及数值求解[J].岩石力学与工程学报,2016,35(3):446-455.
[12]李术才,平洋,王者超,等.基于离散介质流固耦合理论的地下石油洞库水封性和稳定性评价[J].岩石力学与工程学报,2012,31(11):2161-2170.
[13]张农,许兴亮,李桂臣.巷道围岩裂隙演化规律及渗流灾害控制[J].岩石力学与工程学报,2009,28(2):330-335.
[14]张科学,黄曾华,张金虎,等.高压渗流水作用下泥岩巷道破坏特征及失稳机理[J].煤炭科学技术,2015,43(11):1-5.
[15]陈仲颐,周景星.土力学[M].北京:清华大学出版社,1990.
[16]李广信,张丙印,于玉贞.土力学(第2版)[M].北京:清华大学出版社,2013.
[17]王秀英.岩溶隧道堵水限排衬砌外水压力及结构设计研究[D].北京:北京交通大学,2005.
[18]徐芝纶.弹性力学(第五版上下册)[M].北京:高等教育出版社,2016.
[19]谢贻权,林钟祥,丁皓江.弹性力学[M].杭州:浙江大学出版社,1988.
[20]李敬元,李子丰.渗流作用下井筒周围岩石内弹塑性应力分布规律及井壁稳定条件[J].工程力学,1997,14(1):131-137.