梅山铁矿上覆岩体塌陷与错动机理研究_陈勇.pdf

Series N o. 335 金 属 矿 山 总第335 期 M ay 2004 M ET AL M IN E 2004 年第5 期 梅山铁矿上覆岩体塌陷与错动机理研究 陈 勇 ( 上海梅山矿业有限公司) , , , , , , , , , 顶板 塌陷 三维有限元 Study on Mechanism of Overlaying Rockmass Cave-in and Displacement in Meishan Iron Mine Chen Yong ( Shang hai Me ishan M ining Co . , L td ) Abstract I n recen y ears, w i h he moving- dow n of he orebody mining and he yearly increasing produc ion and mining area in M eishan Iron M ine, he ground cave- in area has become larg er and he underg round pressure more eviden , bringing unf avourable fac ors o he mine saf e produc ion . T herefore, he roof cav e- in law and he mechanism of overlay- ing rockmass cave- in and displacemen w ere made by hree- dimensional f ini elemen me hod and he highes s ress con- cen ra ed area w as calcula ed . Based on his, roof caving ime, loca ion and posi io n w ere de ermined so as o ensure he saf e y in pr oduc ion . Key ords Roof , Cave- in, T hree- dimensional f ini elemen , ( 1) , , , , , , , , , R c ( ) 112. 3 M Pa, c 138. 24 M Pa , 185. 76 M Pa, , ( ) ( 2) , , , , ( ) , , R c ( ) 50. 2~ 105. 1 M Pa , R c ( ) 54. 8~ 89. 8 M Pa , ( 3) , 1 1. 1 , , , , , , R Q D , , , , 2 1004 1