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[1]肖家平,杨科,刘帅,等.大倾角煤层开采覆岩破断机制研究[J].中国安全生产科学技术,2019,15(3):75-80.[doi:10.11731/j.issn.1673-193x.2019.03.012]
　XIAO Jiaping,YANG Ke,LIU Shuai,et al.Study on breaking mechanism of overlying strata in deeply inclined coal seam[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(3):75-80.[doi:10.11731/j.issn.1673-193x.2019.03.012]
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大倾角煤层开采覆岩破断机制研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
15
期数:
2019年3期
页码:
75-80
栏目:
职业安全卫生管理与技术
出版日期:
2019-03-31

文章信息/Info

Title:
Study on breaking mechanism of overlying strata in deeply inclined coal seam
文章编号:
1673-193X(2019)-03-0075-06
作者:
肖家平1; 杨科2; 刘帅2; 周波1
(1.淮南职业技术学院 能源工程系，安徽 淮南 232001；2. 安徽理工大学 能源与安全学院，安徽 淮南 232001)
Author(s):
XIAO Jiaping1; YANG Ke2; LIU Shuai2; ZHOU Bo1
(1. Department of Energy Engineering, Huainan Vocational and Technical College, Huainan Anhui 232001, China；2. School of Mining and Safety, Anhui University of Science and Technology, Huainan Anhui 232001, China)
关键词:
大倾角煤层; 覆岩断裂; 联动时序性; 非对称拱结构; 破断机理
Keywords:
deeply inclined coal seam;  overlying strata fracture;  linkage time sequence;  asymmetric arch structure;  breaking mechanism
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2019.03.012
文献标志码:
A
摘要:
为了探究大倾角煤层开采覆岩变形、失稳、破断的演化特征，结合潘二矿1212(3)工作面地质与工程条件，采用数值模拟、物理模拟、理论分析相结合的方法，分析了大倾角煤层开采覆岩变形破坏规律，探讨了巨厚砂岩直覆和无坚硬岩层2种条件下大倾角煤层开采顶板破断失稳形式。研究结果表明：受倾角影响直接顶冒落、滑移，充填下部采空区，基本顶中上部挠度最大而发生断裂，破断裂纹逐渐向基本顶两侧及相邻岩层演化；大倾角煤层倾向岩层间的联动时序性破断是形成非对称拱形承载结构的主因；预裂爆破巨厚砂岩顶板、充填开采软弱岩层工作面可促使关键块体组成的拱形承载结构形成，保证大倾角工作面安全回采。
Abstract:
In order to clarify the evolution characteristics of deformation, instability and breaking of overlying strata in the deeply inclined coal seam, combined with the geological and engineering conditions of the 1212(3) working face in Pan’er Mine, the deformation and failure laws of overlying strata in the deeply inclined coal seam were analyzed by using the combined methods of numerical simulation, physical simulation and theoretical analysis, then the breaking instability forms of roof in the deeply inclined coal seam under two conditions of ultra thick sandstone with direct overlying and without hard strata were discussed. The results showed that affected by the dip angle, the caving and sliding of direct roof occurred and filled the lower goaf. The deflection at the middle and upside of basic roof was the largest and the fracture occurred, then the breaking cracks evolved to both sides of basic roof and adjacent strata gradually. The linkage time sequence breaking between dip strata of deeply inclined coal seam was the main reason for the formation of asymmetric arch bearing structure. The presplit blasting of ultra thick sandstone roof and filling mining of soft strata working face could promote the formation of arch bearing structure composed of key blocks, and ensure the safe mining of deeply inclined working face.

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备注/Memo

备注/Memo:

收稿日期： 2018-12-28
基金项目： 安徽省重点科学研究基金项目(KJ2018A0758)；安徽省重点研究与开发项目(1704a0802129)
作者简介： 肖家平，硕士，副教授，主要研究方向为矿山压力控制和煤矿安全等。
更新日期/Last Update: 2019-04-15