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
In deep mining environments, normal fault structures significantly influence coal seam permeability, which plays a crucial role in coal and gas outbursts. Utilizing a true triaxial multifunctional physical simulation system, this study conducted gas seepage and hydraulic fracturing experiments on normal fault-associated coal seams at depths of - 400 m, - 600 m, and - 800 m. The research systematically investigates the gas permeability evolution in hanging wall and footwall coal seams of normal faults and proposes enhanced control measures tailored to the Guodishan normal fault. The results showed: Permeability exhibited a negative exponential relationship with confining pressure. As confining pressure increases, the permeability disparity between the hanging wall and footwall diminishes. Under true triaxial conditions, the permeability of the coal in the hanging wall of the normal fault is generally lower than that in the footwall. This difference gradually increases with burial depth, with the permeability ratio between the two sides increasing from 2.96 to 10.2 times. Moreover, the permeability reduction in the hanging wall coal is greater than that in the footwall coal. The crack initiation pressure for fracturing is higher in the hanging wall. Post-fracturing, permeability increases significantly in both walls, with the footwall demonstrating superior enhancement. However, the permeability amplification factor decreases progressively with depth. Building on the evolutionary characteristics of the Guodishan normal fault and its permeability patterns, targeted gas control strategies were developed in the Pingdingshan mining area. This work provides theoretical and practical guidance for gas extraction and outburst prevention in fault-affected coal seams.
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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