인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
ABSTRACT To investigate the ground pressure control in gob‐side roadways with small coal pillars in deep and high fully mechanized caving faces, a study was conducted based on the return airway of the 2‐2 coal seam in the 130203 face of Zao Quan Coal Mine of Guo Neng Ning Mei Group. The deformation of the original roadway and the failure of bolts and cables were analyzed. Based on the soil pressure theory, a stress field model was constructed for the rock surrounding the roadway. Calculations showed that the internal stress field ranged 8.8–9.5 m, the advance peak pressure ranged 15–22 m, and the bearing pressure influence ranged 175–190 m. Through FLAC 3D simulations, it was found that the stress on a 5‐m coal column was 7.01 MPa, while the stress on a 15‐m coal column reached 65.25 MPa. Field measurements showed that the deformation of small coal pillars was 690 mm, compared to 370 mm for solid coal pillars, with asymmetric deformation. The bottom heave varied to 750 mm, with a local maximum of 1400 mm. The analysis showed that the roof rock beam fractured above the side of the 5 m small coal pillar due to the influence of an anticline structure, leading to the proposal of an asymmetric control mechanism. Grouting pillars and individual supports were used for support, and the technology was successfully applied in the field, meeting the production requirements. The gob‐side roadway technology with small coal pillars was successfully implemented in the 130203 face, providing a scientific basis for mining in similar mines.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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