The study on the movement law of overlying strata in fully mechanized caving face under alluvium with huge thickness in deep mine

2nd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Chen, Yong^1 ; Gong, Feng-Gang^2 ; Zhao, Ming^1

College of Resources and Safety Engineering, China University of Mning and Technology (Beijing), Beijing

100083, China^1

Inner Mongolia Fu Cheng Mining Company, Inner Mongolia

017000, China^2

关键词: Buried depth;    Fully-mechanized caving faces;    Ground pressure;    Movement of overlying stratum;    Overlying strata;    Support pressure;    Supporting capacities;    Working face;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/59/1/012039/pdf
DOI  :  10.1088/1755-1315/59/1/012039

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Xin ju-long Mine has characteristics of deep buried depth and large alluvium's thickness, and the ground pressure is obvious. In order to realize the effective control of the overlying strata in the fully mechanized caving face under alluvium with huge thickness in deep mine, the movement law of overlying strata is studied. The relationship between the key stratum's fracture and the movement of overlying strata is analyzed based on 'the key stratum' theory, and the movement law is obtained by numerical simulation. The results show that: 1)after the bedrock is completely broken, the strength of the overlying alluvium becomes low, and its supporting capacity is gradually lost and it will gradually sink with the breaking of the bedrock; 2)with the increase of the alluvium's thickness, the roof subsidence is gradually increasing, and with the continuous advancement of the working face, the influence range of the support pressure and the amount of roof subsidence also show a trend of increasing; 3)the study on the movement law of overlying strata under this condition provides a reliable and theoretical guide for the selection of the support and the control of ground pressure.