CAJ | 학술논문

金川三矿位于金川矿区F17断层以东，是超基性贫矿。随着选矿和冶炼水平的提高，三矿区逐渐进入开采阶段。了解矿山深部的地应力状态可以为巷道开挖和支护设计提供科学依据。为此在三矿1200 m水平进行了系统的地应力测量，以了解三矿区的地应力状态特征。现场测量采用改进的空芯包体应力解除法，共获得了7个测点的三维应力数据，并绘出了各测点不同法线方向的截面应力椭圆。测量结果表明，在井下约520 m深度，最大主应力量值约为17～21 MPa，属于中等应力水平。最大主应力方向分为NNW～NNE和NE～WE两组，与区域应力场基本吻合，但又表现出新的趋势方向，其原因可能是受三矿区内两条断裂的影响。部分测点最大主应力倾角超过20°，最大达-49°，以水平应力为主的矿区应力场特征发生改变。研究结果对矿山设计及施工具有重要意义。
금천삼광위우금천광구F17단층이동，시초기성빈광。수착선광화야련수평적제고，삼광구축점진입개채계단。료해광산심부적지응력상태가이위항도개알화지호설계제공과학의거。위차재삼광1200 m수평진행료계통적지응력측량，이료해삼광구적지응력상태특정。현장측량채용개진적공심포체응력해제법，공획득료7개측점적삼유응력수거，병회출료각측점불동법선방향적절면응력타원。측량결과표명，재정하약520 m심도，최대주응역량치약위17～21 MPa，속우중등응력수평。최대주응력방향분위NNW～NNE화NE～WE량조，여구역응력장기본문합，단우표현출신적추세방향，기원인가능시수삼광구내량조단렬적영향。부분측점최대주응력경각초과20°，최대체-49°，이수평응력위주적광구응력장특정발생개변。연구결과대광산설계급시공구유중요의의。
The Jinchuan No. 3 mine in Gansu province of China, is an ultrabasic lean ore and locates at east of fault F17 of Jinchuan mine area. With the improvement of mineral processing and smelting, exploiting of No. 3 mine is on the way. Understanding of in-situ stress state in deep mine can provide the scientific basis to extract and support roadway. In-situ stress measurement was conducted at 1 200 m level to achieve this goal. An improved hollow inclusion stress relief method was employed to obtain three-dimensional stress data of seven measurement sites, which were used to draw section stress-ellipses at different normal directions of each site. The measurement results indicate that at 520 m below the surface, the values of maximum principal stress are about 17-21 MPa, a medium stress level. The directions of the maximum principal stress are within NNW-NNE and NE-WE, and agree with regional stress field basically, and also show a new trend direction. It is probably two faults in No.3 mine area that pose an influence on the direction of the principal stress. However, some dips of maximum principal stress exceed 20° and the largest one is-49°, which reveals a change of horizontal-stress-orient stress field in Jinchuan mine. The result is of great significance in mine design and construction.