The Falling Zone Development Law And Application Research On The Fully Mechanized Mining

Based on detailed analysis of previous research achievements, the subject analyzes the falling zone development law in the fully mechanized mining by practical measure research, numerical simulation and theoretical analysis, on the basis, its field application is further studied.This paper reveals the relationship between the height of roof-falling zones and a recovery thickness, and the damage characteristic and law of overlying strata after mining. Through the theory and practice, we draw out the conclusion that the development characteristic of roof-falling zone in the fully mechanized mining dominates the mining pressure behavior, the roof control law and the supporting pressure distribution. Apart from that, this paper also puts forward the structure characteristics of stope roof and the control law, formulates a technological system of subsequent responses changes which brought out by the thickness change of roof-falling zone.Based on the field measurement, combined the numerical simulation method, begin with the changes brought out by the falling zone height change in the fully mechanized mining, the paper researches the falling zone height development law in the fully mechanized mining, the roof structure in the stope and related control questions. By the field measurement and numerical simulation analysis, we draw out the general law of surrounding rock stress distribution and surface depression, the stress concentration factors in layer mining and fully mechanized mining play an important role in roadway layout.Finally, the application of research results in Baodian Coal Mine validates the correctness of the conclusion, and the field application achieves remarkable economic yielding.