三山岛金矿矿区地应力场特性研究

RESEARCH ON CHARACTERISTICS OF FIELD STRESS IN SANSHANDAO GOLD MINE AREA

三山岛金矿位于山东省莱州湾畔，矿区的工程地质条件及水文地质条件比较复杂，因此对于矿山地下开采存在某些特殊的地质工程问题。本文分别来用地质力学构造线分析方法，现场地应力量测及声发射凯萨尔效应实验方法，研究了矿区的地应力场特性。结果表明，矿区的地质构造应力为Ｎ４０°Ｅ左右，σＮＥ＝１１０ｂａｒ左右，σＮＥ：σＶ：σＮｗ＝１：０．９：０．６５。这为矿山地下开采的稳定性评价提供了基本的力学参数。

The Sanshandao gold mine is situated on the seashore frontier of the Laizhou Bay in Sandong Province, the engineering geology and hydrogeology conditions of the mine area are more complex. For this reason, there exist some specific geoengineering problems for underground mining of the gold mine. In this paper the characteristics of stress field are studied by using analysis method of geomechanical structural lines, in situ stress measurement and experiment method of Kairser effect of acoustic emission, respectively. The results suggest that the current tectonic stress in the mine area is N40°E or so, σNE = 110 bar or so,σNE : σV : σNW = 1 : 0. 9 : 0. 65. This provides basic mechanical parameters or the stability evaluation of the underground mining.