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Research on the Overburden Structure of Fully Mechanized Caving Face in No.2 Coal Seam of Lingwu Coalfield

Author: HouShuHong
Tutor: ChaiJing；CuiHongMing
School: Xi'an University of Science and Technology
Course: Mining engineering
Keywords: 2 # coal seam Caving mining Roof structure Breaking the law Pressure arch
CLC: TD325
Type: Master's thesis
Year: 2008
Downloads: 151
Quote: 4
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Abstract


Ningdong is one of the 13 million tons of coal base our construction , coal production mainly from Lingwu mining area # 2 coal seam , 2 # coal seam in the mine caving mining the Lingwu mine fully mechanized caving mining technology development , prompted The study of the structure of the overburden . Mechanized caving working surface overburden structure , mechanized caving mining overburden caving form of understanding , strengthen Roof management , to guide field production has a certain practical significance . Of mine for Lingwu mining area ciyao Fort C142 fully mechanized caving face engineering geological conditions , on the basis of theoretical analysis of the overburden structure , based on the on-site monitoring , numerical simulation , similar material simulation and theoretical calculation method caving mining the structure of the overburden and breaking the law . Through on-site monitoring , two from the strike and dip of the pressure law of mine . The the the RFPA 2D numerical simulation method to simulate the process of fully mechanized caving face mining , roof structure , roof caving process and regularity of surface movement analysis . Physical similarity simulation study of fully mechanized caving face bracket above the small structure and theoretical calculations . Studies have shown that the Lingwu mine 2 # coal seam fully mechanized liberalized mining pressure law significantly lower dynamic load factor working resistance is higher than the general fully mechanized caving face . Caving mining overburden pressure arch structure , the face working resistance of support from the pressure arch internal rock interaction and arch toe pressure . Put forward the concept of the main pressure arch , to determine the trend lines the vault changes before and after the the main pressure arch initial breaking , arches toe ( bearing pressure ) force status and movement law . Tendencies along the face the strata behavior characteristics obvious the face central pressure cycle pressure and non- pressure pressure during peak moving to both sides . Pressure arch internal structure of the beam structure , the immediate roof and the roof should be clamped beam structure , cycle breaking should be simply supported beam structure breaking down at first , immediate roof caving twice , the old roof caving and beam structure theory verification .

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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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