|
|
|
| Study on evolution mechanisms of overburden structure and coordinated support in conditions of thick unconsolidated layers over thin bedrock |
| Sun Ke1, Zheng Canguang2，Xing Haoshu3, Pan Deyuan4, Zhang Lingzhuo3 |
1. Ordos Yingpanhao Coal Co., Ltd., Ordos 017399, China; 2. Yankuang Energy Group Co., Ltd., Jining 272000, China;
3. College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China;
4. Jining No.2 Coal Mine,Yankuang Energy Group Co., Ltd., Jining 272072, China |
|
|
|
|
Abstract Aiming at the problem of large deformation and impact instability of surrounding rock in gob-side entry under the condition of deep topsoil-thin bedrock strata in Juye mining area, No.2303 Face of Guotun Coal Mine was taken as the engineering background, and revealed the evolution mechanism of overburden structure of deep topsoil-thin bedrock through theoretical analysis, numerical simulation and field test. The research showed that the bedrock layer cannot formed an effective bearing structure due to its low strength and small thickness, which led to the degradation of the overburden from the traditional ' three zones ' to the two-zone structure of the immediate loading zone ( ILZ ) and the static loading zone ( SLZ ). The surface soil layer migrated in an inverted trapezoidal shape, which induced continuous high static load stress, resulting in the gradual deterioration of the surrounding rock of the roadway, such as roof subsidence, asymmetric convergence of two sides, expansion of shallow fracture zone and deep energy accumulation. Based on this, the collaborative optimization support technology of variable diameter pressure relief was proposed : the drilling design of shallow small aperture + deep large aperture was adopted, and the shallow hole section was backfilled with polymer materials to realize the shallow integrity and deep energy release. The application results showed that the technology could effectively control the deformation of surrounding rock, and provided theoretical basis and technical reference for the surrounding rock control of deep gob-side roadway under similar geological conditions.
|
|
|
|
|
|
| [ 1 ] 袁 亮. 我国煤炭主体能源安全高质量发展的理论技术思考[ J ]. 中国科学院院刊，2023，38（ 1 ）：11 - 22.
[ 2 ] 袁 亮，王恩元，马衍坤，等. 我国煤岩动力灾害研究进展及面临的科技难题[ J ]. 煤炭学报，2023，48（ 5 ）：1 825 - 1 845.
[ 3 ] 侯朝炯. 深部巷道围岩控制的关键技术研究[ J ]. 中国矿业大学学报，2017，46（ 5 ）：970 - 978.
[ 4 ] 侯朝炯，王襄禹，柏建彪，等. 深部巷道围岩稳定性控制的基本理论与技术研究[ J ]. 中国矿业大学学报，2021，50（ 1 ）：1 - 12.
[ 5 ] 侯朝炯. 深部巷道围岩控制的有效途径[ J ]. 中国矿业大学学报，2017，46（ 3 ）：467 - 473.
[ 6 ] 何满潮，谢和平，彭苏萍，等. 深部开采岩体力学研究[ J ]. 岩石力学与工程学报，2005（ 16 ）：2 803 - 2 813.
[ 7 ] 窦林名，田鑫元，曹安业，等. 我国煤矿冲击地压防治现状与难题[ J ]. 煤炭学报，2022，47（ 1 ）：152 - 171.
[ 8 ] 张 农，李希勇，郑西贵，等. 深部煤炭资源开采现状与技术挑战[ C ]// 中国煤炭工业协会. 全国煤矿千米深井开采技术. 中国矿业大学矿业工程学院 深部煤炭资源开采教育部重点实验室；山东能源新汶矿业集团有限责任公司；2013.
[ 9 ] 张 茹，张安林，谢和平，等. 不同赋存深度岩石力学行为差异及本构模型研究[ J ]. 中国科学基金，2022，36（ 6 ）：1 008 - 1 015
[ 10 ] 高明忠，叶思琪，杨本高，等. 深部原位岩石力学研究进展[ J ]. 中国科学基金，2021，35（ 6 ）：895 - 903.
[ 11 ] Wang X, Wang J, Zhou X, et al. Mechanical Behaviors and Precu-
rsory Characteristics of Coal - Burst in Deep Coal Mining for Safety - Sustainable Operations: Insights from Experimental Analysis[ J ]. Sustainability, Multidisciplinary Digital Publishing Institute, 2024, 16( 5 ): 2 103.
[ 12 ] 谢和平. 深部岩体力学与开采理论研究进展[ J ]. 煤炭学报，2019，44（ 5 ）：1 283 - 1 305.
[ 13 ] 谭云亮. 矿山压力与岩层控制[ M ]. 北京：煤炭工业出版社， 2008.
[ 14 ] 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.
[ 15 ] Chien Ming - Gao, A Study of the Behaviour of Overlying Strata in Longwall Mining and its Application to Strata Control[ C ], Developments in Geotechnical Engineering, 1981, 13 - 17.
[ 16 ] 钱鸣高，缪协兴，许家林. 岩层控制中的关键层理论研究[ J ]. 煤炭学报，1996（ 3 ）：2 - 7.
[ 17 ] 钱鸣高，张顶立，黎良杰，等. 砌体梁的“S－R”稳定及其应用[ J ]. 矿山压力与顶板管理，1994（ 3 ）：6 - 11，80.
[ 18 ] 宋振骐. 实用矿山压力控制[ M ]. 徐州：中国矿业大学出版社，1988.
[ 19 ] 孙广京，王 平，冯 涛，等. 深井矸石充填综采工作面覆岩活动规律研究[ J ]. 采矿与安全工程学报，2020，37（ 3 ）：562 - 570.
[ 20 ] 常西坤. 深部开采覆岩形变及地表移动特征基础实验研究[ D ]. 青岛：山东科技大学，2010.
[ 21 ] 张海伟. 急倾斜煤层深部开采岩层移动规律研究[ J ]. 煤炭技术，2016，35（ 6 ）：83 - 85. |
|
|
|
