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 As a new type of underground water conservancy project, underground reservoirs in coal mines play a crucial role in protecting and utilizing water resources during mining operations. The safety and reliability of the dam body are key to this technology. Focusing on the basic situation of the Shendong 2–2 coal seam coal mine underground reservoir, this paper uses mechanical analysis, mechanical testing and other methods. From the perspective of the dam body stability under the combined effects of seismic activity and water immersion, this study analyzes the changes in the stability of the dam body during reservoir operation. It focuses on the dynamic impacts of earthquakes and mining-induced tremors, along with the long-term effects of water immersion. By comprehensively analyzing the changes in stress, displacement, and other parameters when the combined dam body (coal pillar + concrete) fails, the research identifies the locations and causes of damage to the dam body under the impact of earthquakes. It also proposes precursor information and characteristics of dam body instability under long-term water immersion and dynamic load effects. The results indicate that under water storage conditions (horizontal stress combined with water immersion), the coal pillar undergoes displacement and eventually becomes unstable, facturing upon reaching its limit strength. Water immersion reduces the mechanical strength of the coal pillar. For a coal pillar 15 m thick, the maximum water storage height is 50 m. It is recommended that displacement changes be used as precursor information for dam body monitoring and early warning during the actual water storage process. The “coal pillar–concrete” combined dam body can resist earthquakes of magnitude 10 and above (1.2 g). During earthquakes, the bottom and middle parts of the dam are the main locations of stress concentration, with the stress change pattern being bottom > middle > top. Due to the difference in material properties between the concrete and coal pillar dam bodies, the difference in acceleration between the two during earthquakes is about 1.14 times, causing the bottom of the coal pillar to be the first to break. Additionally, the stress peak on the submerged side body during an earthquake is about 10% higher than that on the front. This research is important for the stability analysis and monitoring and early warning of underground reservoirs in coal mines and provides a reference for the stability of other underground projects.
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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