【摘要】 应用覆岩空间结构学术观点对孤岛顶煤综放采场冲击矿压机制及其控制技术进行研究。根据覆岩关键层的岩性、层位、范围等因素,覆岩关键层空间结构分为覆岩空间大结构和基本顶有限矿压结构。孤岛顶煤采场冲击矿压发生机制:①孤岛顶煤综放采场型空间大结构形成过程是集中压力逐渐增加的过程,是该时间段发生冲击矿压的力源;②采场基本顶形成最下位型空间结构后,随着工作面推进,基本顶块体产生滑落失稳,造成工作面冲击矿压现象。通过对分段来压理论、基本顶结构失稳理论和坚硬顶板预断裂理论对覆岩关键层空间结构运动的控制作用研究,提出采用覆岩空间结构理论分析、分阶段降低放煤率、坚硬覆岩预爆泄压技术、覆岩坚硬岩层破裂的微地震监测技术等方式方法预防冲击矿压的发生。更多还原

【Abstract】 Study of the rock burst mechanism and its control technology in sublevel caving mining face under isolated top coal is done by applying overlying strata spatial structure academic viewpoint.According to the key stratum lithology、layer place、range and other factors,the key stratum spacial structures are divided into big structure of overlying strata and main roof structure leading to limited pressure.rockburst mechanism in island top coal stope is: ① formation process of-shaped spatial structure in sublevel caving mining face is the process of gradually increasing pressure,and that is the rockburst power source in this period;②After the formation of the lowest-shaped spatial structure of the main roof,with the face advancing,the main roof block slides and which cause the rock burst phenomena.Through the study of the controlling effect on the key stratum spatial structure movement by segmented pressure theory,the instability of basic roof structure theory and hard roof prefracture theory,the ways and means of overlying strata spatial structure theory analyzing and reducing the rate of caving in different phases,hard overlying strata prefracture technology,microseismic monitoring technology overburden rock hard rock rupture of to prevent rock burst occurred are proposed.更多还原