|
|
|
| Asymmetric failure characteristics and control methods of mining roadway in Longtan Mine |
| Zhou Yong |
| Sichuan Chuanmei Huarong Electricity Co., Ltd., Chengdu 610074, China |
|
|
|
|
Abstract Aiming at the problems of mining roadway affected by mining, asymmetric deformation of roof and hidden danger of roof fall, the mining roadway of No.3111N Face in Longtan Mine was taken as the engineering background, the evolution and distribution characteristics of plastic zone of surrounding rock under the mining influence of were obtained by means of numerical simulation, theoretical analysis and field monitoring, and the internal relationship between the distribution characteristics of plastic zone of roof and roof fall was revealed. The results showed that with the mining of the working face, the principal stress ratio of the surrounding rock of the mining roadway gradually increased, and the principal stress direction shifted, resulting in the maximum damage depth of the plastic zone of the surrounding rock concentrated on the side of the roof coal mining, and the hidden danger of roof fall was the largest. Based on this, an asymmetric support parameter design based on the distribution characteristics of the plastic zone of the surrounding rock of the roadway was proposed. The purpose was to improve the stress environment of the surrounding rock by focusing on the reinforcement of the rock mass in the area where the roof was seriously damaged, thereby inhibiting the malignant expansion of the plastic zone of the surrounding rock of the roadway, and thus achieving the purpose of controlling the deformation of the surrounding rock of the roadway.
|
|
|
|
|
|
| [ 1 ] 侯朝炯. 巷道围岩控制[ M ]. 徐州：中国矿业大学出版社，2013.
[ 2 ] 严 红. 特厚煤层巷道顶板变形机理与控制技术[ D ]. 北京：中国矿业大学（北京），2013.
[ 3 ] 贾后省，潘 坤，刘少伟，等. 采动巷道复合顶板离层破坏机理与预测方法[ J ]. 采矿与安全工程学报，2021，38（ 3 ）：518 - 527.
[ 4 ] 康红普，颜立新，郭相平，等. 回采工作面多巷布置留巷围岩变形特征与支护技术[ J ]. 岩石力学与工程学报，2012，31（ 10 ）：2 022 - 2 036.
[ 5 ] 钱鸣高，缪协兴，何富连. 采场“砌体梁”结构的关键块分析[ J ]. 煤炭学报，1994，19（ 6 ）：557 - 563.
[ 6 ] 钱鸣高，茅献彪，缪协兴. 采场覆岩中关键层上载荷的变化规律[ J ]. 煤炭学报，1998，23（ 2 ）：25 - 29.
[ 7 ] 钱鸣高，石平五，许家林. 矿山压力与岩层控制[ M ]. 徐州：中国矿业大学出版社，2010.
[ 8 ] 康红普. 煤矿井下应力场类型及相互作用分析[ J ]. 煤炭学报，2008，33（ 12 ）：1 329 - 1 335.
[ 9 ] 康红普，王金华，高富强. 掘进工作面围岩应力分布特征及其与支护的关系町：煤炭学报，2009，34（ 12 ）：1 585 - 1 593.
[ 10 ] 贾后省，张文彪，刘少伟，等. 不稳定厚煤层采动巷道极软顶板破坏规律及分级控制[ J ]. 岩石力学与工程学报，2022，41（ S2 ）：3 306 - 3 316.
[ 11 ] 浦 海，缪协兴. 采动覆岩中关键层运动对围岩支撑压力分布的影响[ J ]. 岩石力学与工程学报，2002，21（ 增刊2）：2 366 - 2 369.
[ 12 ] 贾后省，马念杰，朱乾坤. 巷道顶板蝶叶塑性区穿透致冒机理与控制方法[ J ]. 煤炭学报，2016，41（ 6 ）：1 384 - 1 392.
[ 13 ] 李 季，马念杰，赵志强. 采动巷道蝶叶形冒顶机理及其控制技术[ J ]. 煤炭科学技术，2017，45（ 12 ）：46 - 52.
[ 14 ] 贾后省，李国盛，翁海龙，等. 巷道蝶叶塑性区顶板冒落特征与层次支护研究[ J ]. 中国安全生产科学技术，2017，13（ 6 ）：20 - 26.
[ 15 ] 刘少伟，罗亚飞，贾后省. 煤巷顶板锚固孔钻进岩层界面能量响应特性研究[ J ]. 中国矿业大学学报，2018，47（ 1 ）：88 - 96.
[ 16 ] 康红普，伊 康. 深部软岩巷道围岩扩容与流变特性模拟研究及应用[ J ]. 煤炭学报，2023，48（ 1 ）：15 - 33.
[ 17 ] 康红普，姜鹏飞，冯彦军，等. 煤矿巷道围岩卸压技术及应用[ J ]. 煤炭科学技术，2022，50（ 6 ）：1 - 15. |
|
|
|
