摘要
大倾角仰斜采场的围岩稳定性是制约安全高效开采的重要因素,以杨营煤矿大倾角仰斜开采生产实践为例,在软弱破碎围岩大倾角仰斜采场中引用"内外应力场理论"来分析采场的力学问题,建立起大倾角仰斜开采条件下,倾角和支架的支护阻力对内外应力场分布影响关系。并运用UDEC数值模拟软件对近水平和大倾角条件下采场矿压规律进行模拟,通过数值模拟对比分析,得出大倾角仰斜采场应力场分布规律及支架支护阻力对围岩稳定性影响的规律,为大倾角仰斜采场围岩稳定性研究提供理论依据。
The stability of surrounding rock in large inclination uphill mining stope is a key factor of safety and high efficiency coal mining. Taking the production practice of Yangying Coal Mine, the mechanical problems were analyzed for large inclination uphill mining stope with weak - broken surrounding rock, based on the theory of internal and external stress field. The relationship was studied, between internal - external stress field and support resistance as well as seam inclination, under uphill mining of large inclination coal seam. UDEC numerical simulation software was applied, to simulate the mine pressure law of mining stope of horizontal and large inclination seam. The law of stress field distribution and the influencing law of support resistance on stability of surrounding rock were obtained, for uphill mining stope in large inclination seam.
出处
《煤炭工程》
北大核心
2015年第7期86-88,92,共4页
Coal Engineering
基金
国家自然科学基金项目(51379119
51304126)
关键词
围岩稳定性
内外应力场
数值模拟
仰斜开采
大倾角
stability of surrounding rock
internal and external stress field
numerical simulation
uphill mining
large inclination
