摘要
针对多个综放采场出现的支架立柱压爆、油缸变形等异常矿压显现,通过对综放采场上覆岩层的运动范围及运动特点、顶板结构动态稳定性的分析,探讨了综放工作面异常压力产生的机理。得出了顶板结构局部铰接失稳(滑落失稳)是造成异常压力主要原因的结论。由于滑落失稳的原因不同,可分为水浸蚀型、地质构造型和顶板失稳型。通过对综放采场支架作用力的分析,给出了计算异常压力的公式。利用顶板结构动态稳定性判断准则,可对异常压力的类型进行判别,从而进一步确定异常压力的计算方法,为采场支架选型和现场控制异常压力提供理论依据。
Aimed at phenomena of support's being pressed to burst or be unable to work in a few fully mechanized sublevel caving longwall faces,according to the analysis of the roof structures,their movement characteristics and the dynamic stability in fully-mechanized sublevel caving face,the mechanism of abnormal pressure on support in fully mechanized sublevel caving face is studied.The conclusion is that the main cause of abnormal pressure is sliding of roof structure.Because of the difference of sliding of roof structure,there are three of abnormal pressure.According to the analysis of the pressure on support,the computation formulae of abnormal pressure on support are presented.Using the dynamic stability judgement rules of roof structures,the types of abnormal pressure on support are distinguished and the computation means of abnormal pressure are defined;and the theoretical foundation about the selection of support in fully mechanized sublevel caving face and controlling abnormal pressure at field experiments are provided.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第S1期266-269,共4页
Rock and Soil Mechanics
基金
国家自然科学基金重大国际合作基金(50320120001)
山东农业大学青年科技创新基金
关键词
综放采场
顶煤放出率
顶板结构动态稳定性
滑落失稳
异常压力
fully mechanized sublevel caving face
top coal's recovery ratio
dynamic stability
sliding of roof structure
abnormal pressure
