摘要
采用力学方法研究了非充分采动阶段随工作面推进覆岩破坏过程与支承压力的动态关系 ,从理论上证明了在一般地层条件下 ,当长壁工作面的开采尺寸达到 1 2 7倍采深时支承压力达到极大值的结论 .这一结论验证了长期以来岩层移动观测的统计结果 (开采尺寸达 1 2～ 1 4倍采深时岩层进入充分采动阶段 ) .研究结果为区段煤柱设计、冲击地压和煤与瓦斯突出的预测等提供了更为准确的理论依据 .
This paper studies the dynamic relationship between abutment pressure and overburden collapse process with advancing of working face by mechanical method, and proves the conclusion that the abutment pressure will reach the maximum value when extracting dimension gets about 4/π times mining depth This result confirms the statistical achievement gotten from a large amount of strata movement survey that overburden will reach the fully movement stage when extracting dimension reaches 1 2～1 4 times mining depth, and this conclusion provides accurate theoretical basis for sublevel pillar design and pressure bump, as well as coal and gas burst prediction
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2002年第3期273-275,共3页
Journal of China Coal Society
基金
国家自然科学基金项目 (5 0 0 740 2 1)
教育部青年骨干教师项目资助
