厚煤层综放工作面区段煤柱合理尺寸留设研究
|
摘要
为解决厚煤层综放工作面区段煤柱尺寸问题,首先采用经验公式与极限平衡法确定了煤柱的合理尺寸范围为14～18 m,结合资源利用率与在巷道允许变形范围内确定了15 m煤柱;然后通过数值模拟的方法得出15 m煤柱存在7 m的弹性核宽度,满足维持巷道稳定的条件。最后,工业性试验的实测结果表明煤柱在回采期间最大片帮深度为0.33 m,没有出现明显的压酥带,在巷道允许变形的范围内,证实了留设15 m区段煤柱的合理性。
In order to solve the problem of coal pillar size in the fully mechanized caving face of thick coal seam,the empirical formula and limit equilibrium method are firstly used to determine the reasonable size range of coal pillars is 14～18 m,which is determined by the combination of resource utilization rate and the allowable deformation range of the roadway:15 m coal pillar;then by numerical simulation method,the elastic core width of 7 m in the 15 m coal pillar is obtained,which satisfies the condition of maintaining the stability of the roadway.Finally,the actual test results of the industrial test show that the maximum depth of the coal pillar during the recovery is 0.33 m,and there is no obvious pressure-frozen zone.In the range of allowable deformation of the roadway,it is proved that the 15 m section coal pillar is reasonable.
In order to solve the problem of coal pillar size in the fully mechanized caving face of thick coal seam,the empirical formula and limit equilibrium method are firstly used to determine the reasonable size range of coal pillars is 14～18 m,which is determined by the combination of resource utilization rate and the allowable deformation range of the roadway:15 m coal pillar;then by numerical simulation method,the elastic core width of 7 m in the 15 m coal pillar is obtained,which satisfies the condition of maintaining the stability of the roadway.Finally,the actual test results of the industrial test show that the maximum depth of the coal pillar during the recovery is 0.33 m,and there is no obvious pressure-frozen zone.In the range of allowable deformation of the roadway,it is proved that the 15 m section coal pillar is reasonable.
引文
[1] 白永亮,李源东.榆家梁矿4-2煤煤柱留设尺寸探讨[J].西部探矿工程,2010,22(4):162-164.
[2] 屠洪盛,屠世浩,白庆升,等.急倾斜煤层工作面区段煤柱失稳机理及合理尺寸[J].中国矿业大学学报,2013,42(1):6-11.
[3] 曾凡杜.深竖井底部廊道衬砌结构计算模型[J].水利水电科技进展,2011,31(S1):69-71.
[4] 刘克功,王家臣,徐金海.短壁机械化开采方法与煤柱稳定性研究[J].中国矿业大学学报,2005(1):27-32.
[5] 余会琴,陈梦成.无限大板中矩形裂纹Ⅰ型应力强度因子的计算——有限部积分边界元法[J].华东交通大学学报,2004,21(2):44-46.
[6] 张磊,舒继森,彭竹,等.基于极限平衡理论的边坡稳定评价方法[J].矿业安全与环保,2008,35(6):62-63.
[7] 陈超群,周宁,郭靖.含硬煤分层综放工作面合理区段煤柱宽度数值模拟[J].煤矿安全,2012,43(9):60-63.
[8] 孟浩.基于能量释放法的近距离煤层巷道布置位置优化分析[J].煤矿安全,201843(10):25-27.
[9] 张付涛,魏陆海,郭志伟.平缓地貌间隔式煤柱下底板应力分布规律研究[J].煤矿安全,2016,47(9):60-63.
[2] 屠洪盛,屠世浩,白庆升,等.急倾斜煤层工作面区段煤柱失稳机理及合理尺寸[J].中国矿业大学学报,2013,42(1):6-11.
[3] 曾凡杜.深竖井底部廊道衬砌结构计算模型[J].水利水电科技进展,2011,31(S1):69-71.
[4] 刘克功,王家臣,徐金海.短壁机械化开采方法与煤柱稳定性研究[J].中国矿业大学学报,2005(1):27-32.
[5] 余会琴,陈梦成.无限大板中矩形裂纹Ⅰ型应力强度因子的计算——有限部积分边界元法[J].华东交通大学学报,2004,21(2):44-46.
[6] 张磊,舒继森,彭竹,等.基于极限平衡理论的边坡稳定评价方法[J].矿业安全与环保,2008,35(6):62-63.
[7] 陈超群,周宁,郭靖.含硬煤分层综放工作面合理区段煤柱宽度数值模拟[J].煤矿安全,2012,43(9):60-63.
[8] 孟浩.基于能量释放法的近距离煤层巷道布置位置优化分析[J].煤矿安全,201843(10):25-27.
[9] 张付涛,魏陆海,郭志伟.平缓地貌间隔式煤柱下底板应力分布规律研究[J].煤矿安全,2016,47(9):60-63.
© 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 |