大采高综采采场基本顶周期破断特征研究
|
摘要
为研究支架和采空区垮落矸石对大采高综采采场基本顶周期破断的影响,引入了表征支撑作用的特征量,建立了基本顶顶板岩梁力学模型,分析了基本顶的周期破断特征。研究表明:相同支撑条件下,基本顶周期破断距会随着顶板的厚度增大、抗拉强度增大、荷载量减小而增大;相同开采条件下,基本顶破断距随着支架支护强度和控顶距、垮落矸石支撑力的增大而增大。结合现场实测数据,对基本顶周期破断特征进行了有效验证。
To study the effect of supports and gob waste rock on the periodic fracture characteristics of the main roof in mechanized face with large mining height, the characteristic quantity of supporting effect is introduced, the mechanical model of roof rock beam is established, and the periodic fracture characteristics of basic roof are analyzed. The results show that the main roof periodic fracture interval increases with the increase of the thickness and tensile strength of main roof and the decrease of the load value under the same supporting condition; and main roof periodic fracture interval increases with the increase of the supporting strength and roof distance of the support and gob waste rock under the same mining condition. In combination with insitu monitoring, the main roof periodic fracture feature was verified.
To study the effect of supports and gob waste rock on the periodic fracture characteristics of the main roof in mechanized face with large mining height, the characteristic quantity of supporting effect is introduced, the mechanical model of roof rock beam is established, and the periodic fracture characteristics of basic roof are analyzed. The results show that the main roof periodic fracture interval increases with the increase of the thickness and tensile strength of main roof and the decrease of the load value under the same supporting condition; and main roof periodic fracture interval increases with the increase of the supporting strength and roof distance of the support and gob waste rock under the same mining condition. In combination with insitu monitoring, the main roof periodic fracture feature was verified.
引文
[1]杨胜利,孔德中.大采高煤壁片帮防治柔性加固机理与应用[J].煤炭学报,2015,40(6):1361-1367.
[2]Wu Fengfeng,Liu Changyou,Yang Jingxuan.Mode of overlying rock roofing structure in large mining height coal face and analysis of support resistance[J].Journal of Central South University,2016,23(12):3262-3272.
[3]钱鸣高,许家林,石平五.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2010:73-78.
[4]鞠金峰,许家林,朱卫兵.浅埋特大采高综采工作面关键层“悬臂梁”结构运动对端面漏冒的影响[J].煤炭学报,2014,39(7):1197-1204.
[5]鞠金峰,许家林,王庆雄.大采高采场关键层“悬臂梁”结构运动型式及对矿压的影响[J].煤炭学报,2011,36(12):2115-2120.
[6]LI Z L,DOU L M,CAI W,et al.Mechanical Analysis of Static Stress Within Fault-Pillars Based on a Voussoir Beam Structure[J].Rock Mechanics and Rock Engineering,2016,49(3):1097-1105.
[7]宁建国,刘学生,谭云亮,等.浅埋煤层工作面弱胶结顶板破断结构模型研究[J].采矿与安全工程学报,2014,31(4):569-574.
[8]王琦,李术才,李智,等.煤巷断层区顶板破断机制分析及支护对策研究[J].岩土力学,2012,33(10):3093.
[9]陈磊.基于弹性基础梁模型的来压步距确定[J].煤矿安全,2017,48(5):49-52.
[10]王家臣,王蕾,郭尧.基于顶板与煤壁控制的支架阻力的确定[J].煤炭学报,2014,39(8):1619-1624.
[11]吴锋锋,杨敬轩,于斌,等.厚及特厚煤层工作面顶板垮落高度的确定[J].中国矿业大学学报,2014,43(5):765-772.
[12]Lai Xingping,Sun Huan,Shan Pengfei,et al.Structure instability forecasting and analysis of giant rock pillars in steeply dipping thick coal seams[J].International Journal of Minerals,Metallurgy,and Materials,2015,22(12):1233-1244.
[13]吕梦蛟.神东矿区长壁采场矿压显现规律与支架选型[J].煤炭科学技术,2010,38(11):48-52.
[14]卢邦稳,刘长武,刘德峰,等.浅埋薄基岩工作面覆岩活动规律3维物理相似模拟研究[J].四川大学学报(工程科学版),2016,48(S1):107-113.
[15]范盛金.一元三次方程的新求根公式与新判别法[J].海南师范学院学报(自然科学版),1989(2):91-98.
[2]Wu Fengfeng,Liu Changyou,Yang Jingxuan.Mode of overlying rock roofing structure in large mining height coal face and analysis of support resistance[J].Journal of Central South University,2016,23(12):3262-3272.
[3]钱鸣高,许家林,石平五.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2010:73-78.
[4]鞠金峰,许家林,朱卫兵.浅埋特大采高综采工作面关键层“悬臂梁”结构运动对端面漏冒的影响[J].煤炭学报,2014,39(7):1197-1204.
[5]鞠金峰,许家林,王庆雄.大采高采场关键层“悬臂梁”结构运动型式及对矿压的影响[J].煤炭学报,2011,36(12):2115-2120.
[6]LI Z L,DOU L M,CAI W,et al.Mechanical Analysis of Static Stress Within Fault-Pillars Based on a Voussoir Beam Structure[J].Rock Mechanics and Rock Engineering,2016,49(3):1097-1105.
[7]宁建国,刘学生,谭云亮,等.浅埋煤层工作面弱胶结顶板破断结构模型研究[J].采矿与安全工程学报,2014,31(4):569-574.
[8]王琦,李术才,李智,等.煤巷断层区顶板破断机制分析及支护对策研究[J].岩土力学,2012,33(10):3093.
[9]陈磊.基于弹性基础梁模型的来压步距确定[J].煤矿安全,2017,48(5):49-52.
[10]王家臣,王蕾,郭尧.基于顶板与煤壁控制的支架阻力的确定[J].煤炭学报,2014,39(8):1619-1624.
[11]吴锋锋,杨敬轩,于斌,等.厚及特厚煤层工作面顶板垮落高度的确定[J].中国矿业大学学报,2014,43(5):765-772.
[12]Lai Xingping,Sun Huan,Shan Pengfei,et al.Structure instability forecasting and analysis of giant rock pillars in steeply dipping thick coal seams[J].International Journal of Minerals,Metallurgy,and Materials,2015,22(12):1233-1244.
[13]吕梦蛟.神东矿区长壁采场矿压显现规律与支架选型[J].煤炭科学技术,2010,38(11):48-52.
[14]卢邦稳,刘长武,刘德峰,等.浅埋薄基岩工作面覆岩活动规律3维物理相似模拟研究[J].四川大学学报(工程科学版),2016,48(S1):107-113.
[15]范盛金.一元三次方程的新求根公式与新判别法[J].海南师范学院学报(自然科学版),1989(2):91-98.