急倾斜煤层俯伪斜工作面基本顶破断特征分析

doi:10.11799/ce202306017

Abstract

Abstract:

In order to further study the roof fracture mechanism of pitching oblique comprehensive working face in steeply inclined coal seam, taking N2821 fully mechanized working face of Fengchun Coal Mine as an example, based on the thin plate theory, considering the influence of coal seam angle and working face angle on stope, a model of elastic thin plate on basic roof of pitching oblique comprehensive working face in steeply inclined coal seam is established. The equation of roof deflection and deformation of subducted pseudo inclined working face is obtained. The stress distribution characteristics of the main roof of the pitching oblique comprehensive working face under the influence of two angles are further analyzed. Moreover, the initial and periodic fracture distances of the main roof are theoretically calculated to be 13.7 m and 7.9 m, respectively.The maximum deflection point of the working face is located at the lower end of the middle part of the working face and the characteristics of ‘?->’ type initial fracture and ‘c->’ type periodic fracture of roof in steeply inclined coal seam are revealed. The research results provide a certain theoretical reference for the control of coal seam roof in steeply inclined working face.

CLC Number:

TD327

References

[1] 王崧玮,曹安业,王华,等.急倾斜特厚煤层“错动—夹持”型冲击地压机理[J].采矿与安全工程学报,2022,39(04):711-719+769.
Chengchun Wang, Anye Cao, Hua Wang. Mechanism of “dislocation-clamping”rock burst in steeply inclined and extra thick coal seam [J]. Journal of Mining ＆ Safety Engineering, 2022,39(04):711-719+769.
[2] 李宗福, 曹树刚, 刘勇, 等.基于3DEC的急倾斜薄煤层俯伪斜开采矿压模拟研究[J]. 矿业安全与环保, 2017,44(03):1-5+9
Zongfu Li, Shugang Cao, Yong Liu, et al. Simulation Study on Strata Pressure in Pitching Oblique Mining of Steep Thin Seam Based on 3DEC [J]. Mining Safety & Environmental Protection, 2017,44(03):1-5+9.
[3] 池小楼,杨科.大倾角煤层旋采巷道围岩破坏机理与支护技术[J].地下空间与工程学报,2019,15(05):1504-1510.
Xiaolou Chi, Ke Yang. Roadway Surrounding Rock Failure Mechanism and Support Technology of Revolving Mining Stage in Steeply Inclined [J]. Chinese Journal of Underground Space and Engineering, 2019,15(05):1504-1510
[4] 冯锦艳,于志全,郭志培.大倾角煤层综放开采老顶力学结构阻水性探讨[J].地下空间与工程学报,2017,13(01):242-249.
Jinyan Feng, Zhiquan Yu, Zhipei Guo. Discussion on the Water Ｒesistance of the Broken Main Ｒoof Structure of the Steep Coal Seam with Fully-mechanized Mining [J]. Chinese Journal of Underground Space and Engineering, 2017,13(01):242-249
[5] 屠洪盛, 屠世浩, 陈芳, 等. 基于薄板理论的急倾斜工作面顶板初次变形破断特征研究[J]. 采矿与安全工程学报, 2014,31(01):49-54+59.
Hongsheng Tu, Shihao Tu, Fang Chen, et al. Study on the deformation and fracture feature of steep inclined coal seam roof based on the theory of thin plates [J]. Journal of Mining and Safety Engineering, 2014,31(01):49-54+59.
[6] 张嘉凡, 石平五 ,张慧梅. 急斜煤层初次破断后基本顶稳定性分析[J]. 煤炭学报, 2009,34(09):1160-1164.
Jiafan Zhang, Pingwu Shi, Huimei Zhang,. Stability analysis of basic roof after first destruction in the steep seam [J], Journal of China Coal Society, 2009,34(09):1160-1164.
[7] 潘瑞凯, 曹树刚, 沈大富, 等. 俯伪斜开采采场顶板破断模型与工程实测研究[J]. 采矿与安全工程学报, 2017,34(04):637-643.
Ruikai Pan, Shugang Cao, Dafu Shen, et al .Model of the roof fracture in pitching diagonal mining panel and its field measurement [J]. Journal of Mining and Safety Engineering, 2017,34(04):637-643.
[8] 周清龙, 刘大鹏, 赵阳升, 等. 急倾斜煤层顶板破坏特征相似模拟[J]. 煤矿安全, 2014,45(01):26-28.
Qinglong Zhou, Dapeng Liu, Yangsheng Zhao,et al. Study on Similar Simulation for Roof Failure Characteristics of Steep Coal Seam [J]. Safety in Coal Mines, 2014,45(01):26-28.
[9] 肖家平, 刘帅, 池小楼. 近距离采空区下大倾角俯伪斜工作面矿压显现特征研究[J]. 煤炭工程, 2019,51(06):93-98.
Jiaping Xiao, Shuai Liu, Xiaolou Chi. Characteristics of Strata Behavior in Large Inclined Angular Pseudo－inclined Face under Complicated Conditions [J]. Coal Engineering, 2019,51(06):93-98.
[10] 王金安, 张基伟, 高小明, 等. 大倾角厚煤层长壁综放开采基本顶破断模式及演化过程(Ⅰ)——初次破断[J]. 煤炭学报, 2015,40(06):1353-1360.
Jinan Wang, Jiwei Zhang, Xiaoming Gao, et al. Fracture mode and evolution of main roof stratum above longwall fully mechanized top coal caving in steeply inclined thick coal seam(Ⅰ): initial fracture [J]. Journal of China Coal Society, 2015,40(06):1353-1360.
[11] 王金安, 张基伟, 高小明, 等. 大倾角厚煤层长壁综放开采基本顶破断模式及演化过程(Ⅱ)——周期破断[J]. 煤炭学报, 2015,40(08):1737-1745.
Jinan Wang, Jiwei Zhang, Xiaoming Gao, et al. Fracture mode and evolution of main roof stratum above longwall fully mechanized top coal caving in steeply inclined thick coal seam(Ⅰ): Periodic fracture [J]. Journal of China Coal Society, 2015,40(08):1737-1745.
[12] 徐芝纶. 弹性力学简明教程（第五版）[M]．北京：高等教育出版社，2018.
Zhilun Xu. Elastic mechanics brief tutorial [M]. Beijing: Higher Education Press, 2018.
[13] 尹光志, 王登科, 张卫中. (急)倾斜煤层深部开采覆岩变形力学模型及应用[J]. 重庆大学学报(自然科学版), 2006(02):79-82.
Guangzhi Yin, Dengke Wang, Weizhong Zhang. Mechanics Model to Deformation of Covered Rock Strata and Its Application in Deep Mining of Steep or Inclined Seam [J]. Journal of Chongqing University (Natural Science Edition), 2006(02):79-82.
[14] 付宝连. 弯曲薄板的修正的功的互等定理及其应用[J]. 应用数学和力学, 2014,35(11):1197-1209.
Baolian Fu.Corrected Reciprocal Theorem of Works for Bending Thin Plates and Its Application [J]. Applied Mathematics and Mechanics, 2014,35(11):1197-1209.
[15] 张益东, 程敬义, 王晓溪, 等. 大倾角仰(俯)采采场顶板破断的薄板模型分析[J]. 采矿与安全工程学报, 2010,27(04):487-493.
Yidong Zhang, Jingyi Cheng, Xiaoxi Wang, et al., Thin Plate Model Analysis on Roof Break of Up-Dip or Down-Dip Mining Stope [J]. Journal of Mining and Safety Engineering, 2010,27(04):487-493.
[16] 尹嘉帝. 大倾角综采工作面覆岩破断特征及矿压显现规律研究[D]. 安徽理工大学, 2021.
JiaDi Yin. Study on Overburden Rock Fracture Characteristics and Ore Pressure Behavior Law Of Fully Mechanized Face with Large Dip Angle [D]. Anhui University of Science and Technology, 2021.
[17] 冯星. “三软”煤层仰采工作面覆岩运动规律及控制技术研究[D]. 中国矿业大学，2018.
Xing Feng. Study on the Overlying Strata Movement Law and Control Technology of "Three Soft" Coal Seam up-dip Working Face. [D]. China University of Mining Technology, 2018.
[18] 易春. Ritz算法在薄板屈曲问题中的应用[J]. 高等函授学报(自然科学版), 2010,23(05):26-27+40.
Chun Yi. Ritz Application of the algorithm in the buckling problem of thin plate [J]. Journal of Continuing Higher Education (Natural Science Edition), 2010,23(05):26-27+40.
[19] 房局. 急倾斜俯伪斜采场顶板破断特征及矿压规律研究[D]. 重庆大学, 2018.
Ju Fang. Research on Roof Breaking Characteristics and Law of Mine Pressure in Steep Bow Pseudo-Inclined Seam [D]. Chongqing University, 2018.
[20] 蔡美峰. 岩石力学与工程[M]．北京：科学教育出版社，2002.
Meifeng Cai. Geomechanics and Engineering[M]. Beijing: Education Science Press, 2022

Analysis on Main Roof Fracture Characteristics of Pitching Oblique Comprehensive Working Face in Steeply Inclined Coal Seam

PDF (Mobile)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	. Research on crack propagation model of roof sandstone based on machine learning #br# [J]. Coal Engineering, 2026, 58(6): 200-206.
[2]	. Study on combined pressure relief technology of blasting pre-splitting and large-diameter boreholes for hard roofs in extra-thick coal seams [J]. Coal Engineering, 2026, 58(5): 141-150.
[3]	. Roof deformation patterns and key influencing factors in fully mechanized mining faces with paste filling [J]. Coal Engineering, 2025, 57(11): 1-9.
[4]	. Study on the temporal and spatial evolution law of fractures in Menkeqing coal mine by hydraulic fracturing to cut roof and relieve pressure [J]. Coal Engineering, 2025, 57(10): 68-77.
[5]	. Evolution law and treatment of arc-shaped triangular zone at the working face end under thick bedrock [J]. Coal Engineering, 2025, 57(7): 74-80.
[6]	. Initial caving technology of long-short hole multi-dimensional hydraulic fracturing in fully mechanized top-coal caving face [J]. Coal Engineering, 2025, 57(6): 88-95.
[7]	. Floor failure characteristics in fractured zones based on seismic event energy density analysis [J]. Coal Engineering, 2025, 57(4): 82-87.
[8]	. Research on Monitoring Technology and Method of UAV-LiDAR for Mining Subsidence [J]. Coal Engineering, 2023, 55(8): 130-136.
[9]	. Application of UAV inclined photogrammetry in comprehensive ecological restoration of subsidence area above goafs#br# #br# [J]. Coal Engineering, 2024, 56(5): 36-41.
[10]	. [J]. Coal Engineering, 2023, 55(4): 77-81.
[11]	Liang Ming 无无. Study on reasonable parameters of pre-splitting blasting pressure relief of residual coal pillar in upper coal seam [J]. Coal Engineering, 2023, 55(4): 82-86.
[12]	. Mining damage identification based on SBAS-InSAR technology [J]. Coal Engineering, 2024, 56(4): 171-176.
[13]	. Study on Residual Void Ratio of Goaf Left by Knife Pillar Mining Method Below a New Substation Site [J]. Coal Engineering, 2023, 55(3): 139-144.
[14]	. Research on temporal and spatial variation of soil quality in mining area under coal mining disturbance [J]. Coal Engineering, 2023, 55(2): 134-139.
[15]	. Study on coupling 3D directional hydraulic fracturing technology of depth and shallow holes in initial mining in hard roof working face [J]. Coal Engineering, 2023, 55(1): 53-58.