하장광산의 갱내채광을 위한 채광설계 및 안정성 연구
Study on the Safety and the Mine Design for Underground Mining at Hajang Limestone Mine
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참고문헌
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초록
쌍용하장 석회석광산은 노천채광에서 지하채굴 방식으로 전환하기 위하여 다음과 같은 연구들이 수행되었다. 지질, 지질구조 및 코아 조사를 통한 광상의 확인, 현장의 불연속면 조사, Schmidt hammer 시험 그리고 시추코아에 대한 RQD 측정이 이루어졌다. 또한 광산설계 및 수치해석의 입력자료를 위하여 실험실 시험과 현지암반평가를 실시하였다. 이 값들을 이용하여 무지보 상태로 안정성을 유지할 수 있는 갱도 및 채광장의 규격과 광주의 크기를 결정하였고, 광체의 형태 등을 고려하여 채광법을 결정하였다. 조사자료를 바탕으로 설계된 갱도 및 채광장에 대해 3차원 수치해석으로 채광장의 안정성 검토를 실시하였다.
Abstract
We have undertaken detailed investigations to change the mining methods from open-pit to underground and to design the underground mining operations at Hajang limestone mine. The detailed survey of geology, structural geology and borehole core was undertaken to verify the shape of deposit. The survey of discontinuities and Schmidt hammer test were also carried out and RQD values were obtained from the borehole cores. The relevant mechanical properties of rocks were determined by the laboratory test and the rock mass classification system for the mine design and input data for the numerical analysis. The dimensions of unsupported span for gangway, working place and pillar were decided based on the values of RMR as well as the Q system. The mining method was determined by considering the geometry of the deposit as well as the recovery. The stability for suggested mine design was examined through the 3-D numerical analysis.
참고문헌 (13)
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