极不稳固采场稳定性分析
|
摘要
为确定节理发育矿体开采顶板合理跨度尺寸,对岩芯库和井下岩体节理裂隙进行统计分析。首先对顶板跨度进行理论求解,然后利用UDEC软件对4,6,8,10m4种顶板跨度进行应力场和位移场分析。结果用弹塑性力学、厚跨比法和载荷传递交汇线法得到的顶板跨度分别为8.37,9.32和8.08m。数值模拟结果表明顶板跨度8 m较合理。对比理论结果引入修正系数α,其值介于0.86～0.99之间,顶板最大变形位移和跨度之间满足y=aln(x)+b的对数函数规律。改进Potvin法得到采场顶板极限暴露面积为448m~2。现场监测结果发现,靠近上盘顶板下沉相对位移较靠近下盘监测点要大,验证了数值结果的正确性。
In order to determine the reasonable roof span width for the jointed ore body,the statistical analysis on the core base and joint cracks of the ore body was carried out.Firstly,the roof span was theoretically solved,and then the stress field and displacement field of roof spans with width of 4,6,8 and 10 m were analyzed by UDEC.Roof span width obtained by elastoplastic mechanics,thick span ratio method and load transfer intersection line method was 8.37,9.32 and 8.08 m,respectively.The simulated result showed that reasonable roof span width was 8 m.Compared with the theoretical calculation result,a modifying parameterα was introduced,and its value was between 0.86 and 0.99.The maximum displacement of roof and the span met the law of logarithmic function of y=aln(x)+b.The limit exposed area of stope roof obtained by improving Potvin method was 448 m~2.Field monitoring results showed that the relative displacement of the roof near the upper wall was larger than that near the lower wall,which verified the correctness of the numerical results.
In order to determine the reasonable roof span width for the jointed ore body,the statistical analysis on the core base and joint cracks of the ore body was carried out.Firstly,the roof span was theoretically solved,and then the stress field and displacement field of roof spans with width of 4,6,8 and 10 m were analyzed by UDEC.Roof span width obtained by elastoplastic mechanics,thick span ratio method and load transfer intersection line method was 8.37,9.32 and 8.08 m,respectively.The simulated result showed that reasonable roof span width was 8 m.Compared with the theoretical calculation result,a modifying parameterα was introduced,and its value was between 0.86 and 0.99.The maximum displacement of roof and the span met the law of logarithmic function of y=aln(x)+b.The limit exposed area of stope roof obtained by improving Potvin method was 448 m~2.Field monitoring results showed that the relative displacement of the roof near the upper wall was larger than that near the lower wall,which verified the correctness of the numerical results.
引文
[1]杨官涛,袁梅芳.缓倾斜薄矿脉机械化开采新技术及工程实践[J].矿业研究与开发,2013,33(3):1-3.
[2]王燕,袁永忠,王芳,等.缓倾斜薄矿体采矿方法试验研究[J].黄金,2013(4):36-40.
[3]于跟波,杨鹏,陈赞成.缓倾斜薄矿体矿柱回采采场围岩稳定性研究[J].煤炭学报,2013,38(S2):294-298.
[4]Song W D,Xu W B,Du J H,et al.Stability of workface using long-wall mining method in extremely thin and gently inclined iron mine[J].Safety Science,2012,29(4):624-628.
[5]宋卫东,徐文彬,杜建华,等.长壁法开采缓倾斜极薄铁矿体围岩变形破坏机理[J].北京科技大学学报,2011,33(3):264-269.
[6]翟会超,闫满志.壁式削壁充填法采场顶板临界跨度计算[J].岩土力学,2013,34(S1):337-339.
[7]周宗红,侯克鹏,任凤玉.分段空场崩落采矿法顶板稳定性分析[J].采矿与安全工程学报,2012,29(4):538-542.
[8]Zhou Z H,Hou K P,Ren F Y.Roof stability analysis of sublevel open stope and caving mining method[J].Journal of Mining&Safety Engineering,2012,29(4):538-542.
[9]董金奎,冯夏庭,张希巍,等.地下采场破碎岩体稳定性评价与参数优化[J].东北大学学报(自然科学版),2013,34(9):1322-1326.
[10]吴月秀,刘泉声,卢海峰,等.UDEC中Saeb-Amadei节理本构模型的二次开发[J].岩石力学与工程学报,2012,31(S1):3022-3030.
[11]杜朋召,刘建,韩志强,等.基于复杂结构精细描述的岩质高边坡稳定性分析[J].岩土力学,2013,34(S1):393-398.
[12]薛一鸣.夏甸金矿大跨度采场稳定性数值分析与报警阈值研究[D].北京:北京科技大学,2007.
[13]谢冰,李海波,王长柏,等.节理几何特征对预裂爆破效果影响的数值模拟[J].岩土力学,2011,32(12):3812-3820.
[14]莫振泽,李海波,周青春,等.基于UDEC的隧道掘进机滚刀破岩数值模拟研究[J].岩土力学,2012,33(4):1196-1203.
[15]刘振有,王来贵.基于UDEC的边坡稳定性分析[J].辽宁工程技术大学学报,2007,26(S):113-115.
[16]Kang Q R,Tang J X,Hu H,et al.Stress distribution rule of roadway affected by overhead mining in gently inclined coal seams group[J].Transactions of Nonferrous Metals Society of China,2011(21):529-535.
[17]朱先洪,付建新,戚伟,等.Mathews稳定性图法在薄矿体开采采场设计中的应用[J].黄金,2013,34(8):37-40.
[18]Song W D,Xu W B,Du J H,et al.Stability of workface using long-wall mining method in extremely thin and gently inclined iron mine[J].Safety Science,2012,50:624-628.
[19]付建新,宋卫东,杜建华,等.中深孔开采急倾斜薄矿体采场顶板力学模型及围岩扰动规律研究[J].岩石力学与工程学报,2014,33(S1):3277-3283.
[2]王燕,袁永忠,王芳,等.缓倾斜薄矿体采矿方法试验研究[J].黄金,2013(4):36-40.
[3]于跟波,杨鹏,陈赞成.缓倾斜薄矿体矿柱回采采场围岩稳定性研究[J].煤炭学报,2013,38(S2):294-298.
[4]Song W D,Xu W B,Du J H,et al.Stability of workface using long-wall mining method in extremely thin and gently inclined iron mine[J].Safety Science,2012,29(4):624-628.
[5]宋卫东,徐文彬,杜建华,等.长壁法开采缓倾斜极薄铁矿体围岩变形破坏机理[J].北京科技大学学报,2011,33(3):264-269.
[6]翟会超,闫满志.壁式削壁充填法采场顶板临界跨度计算[J].岩土力学,2013,34(S1):337-339.
[7]周宗红,侯克鹏,任凤玉.分段空场崩落采矿法顶板稳定性分析[J].采矿与安全工程学报,2012,29(4):538-542.
[8]Zhou Z H,Hou K P,Ren F Y.Roof stability analysis of sublevel open stope and caving mining method[J].Journal of Mining&Safety Engineering,2012,29(4):538-542.
[9]董金奎,冯夏庭,张希巍,等.地下采场破碎岩体稳定性评价与参数优化[J].东北大学学报(自然科学版),2013,34(9):1322-1326.
[10]吴月秀,刘泉声,卢海峰,等.UDEC中Saeb-Amadei节理本构模型的二次开发[J].岩石力学与工程学报,2012,31(S1):3022-3030.
[11]杜朋召,刘建,韩志强,等.基于复杂结构精细描述的岩质高边坡稳定性分析[J].岩土力学,2013,34(S1):393-398.
[12]薛一鸣.夏甸金矿大跨度采场稳定性数值分析与报警阈值研究[D].北京:北京科技大学,2007.
[13]谢冰,李海波,王长柏,等.节理几何特征对预裂爆破效果影响的数值模拟[J].岩土力学,2011,32(12):3812-3820.
[14]莫振泽,李海波,周青春,等.基于UDEC的隧道掘进机滚刀破岩数值模拟研究[J].岩土力学,2012,33(4):1196-1203.
[15]刘振有,王来贵.基于UDEC的边坡稳定性分析[J].辽宁工程技术大学学报,2007,26(S):113-115.
[16]Kang Q R,Tang J X,Hu H,et al.Stress distribution rule of roadway affected by overhead mining in gently inclined coal seams group[J].Transactions of Nonferrous Metals Society of China,2011(21):529-535.
[17]朱先洪,付建新,戚伟,等.Mathews稳定性图法在薄矿体开采采场设计中的应用[J].黄金,2013,34(8):37-40.
[18]Song W D,Xu W B,Du J H,et al.Stability of workface using long-wall mining method in extremely thin and gently inclined iron mine[J].Safety Science,2012,50:624-628.
[19]付建新,宋卫东,杜建华,等.中深孔开采急倾斜薄矿体采场顶板力学模型及围岩扰动规律研究[J].岩石力学与工程学报,2014,33(S1):3277-3283.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |