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Research on Influences of the Primary Key Stratum on Evolution of Water Flowing Fractured Zone

Author: WangZhiGang
Tutor: XuJiaLin
School: China University of Mining and Technology
Course: Mining engineering
Keywords: Water flowing fractured zone Main key stratum Water inrush disaster Green Mining
CLC: TD325
Type: Master's thesis
Year: 2008
Downloads: 620
Quote: 4
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Abstract


Strata Mining breaking fissures constitute the main factors of mine water inrush channel , the evolution of rock fracture mining conditions to determine the mine water inrush occurred , mine water inrush prediction and formulation of Mine Water Disaster Control Measures provide important theoretical basis . Therefore , in-depth study of the water flowing fractured zone height and its influencing factors have important theoretical value and engineering significance . This paper summarizes the analysis results of previous studies based on the use of the theoretical analysis , physical modeling , numerical simulation and field measurement method to fill even tower coal mine four districts roof abnormal water inrush disaster Shendong mining engineering background , application the critical layer of strata control theory to study the location and key layer of overlying rock master key layer break fault block structure movement of roof water flowing fractured with the impact of the development of height and dynamic evolution . The results show that : the location of the main key stratum , with the development of the overlying rock roof water flowing fractured height greater impact . Under the same conditions , the main critical layer located lower than the main critical layer is located in the upper water flowing fractured corresponding with height greater . Main critical layer is located in the lower position , the main key to breaking layer makes the roof water flowing fractured zone height jump mutation occurred . The critical layer periodically breaking and block structure critical layer of overburden hydraulic conductivity fractured movement has been in produce - development - closed stable - generate cycle . Same time proven Bulianta mine 31401 Roof water flowing fractured with height elaborated response relationship between the cyclical break fault block structure of the main key stratum movement with the water level changes of the hydrological observation holes revealed abnormal protrusion of the four districts the mechanism of water and predict four 1-2 coal water inrush danger area , 31401 face advance retracement and cancel the arrangement of water drainage drilling subsequent mining plan . The results of this research has been to complement the four districts with Tower coal mine 31401 working face has been verified , field application has achieved good economic benefits .

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CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Rock pressure and rock movement > Rock movement
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