厚层坚硬顶板变形能积聚与断裂能释放规律研究

项目名称： 厚层坚硬顶板变形能积聚与断裂能释放规律研究

项目编号： No.51204102

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 冶金与矿业学科

项目作者： 顾士坦

作者单位： 山东科技大学

项目金额： 25万元

中文摘要： 坚硬顶板强度高、整体性强、自承能力强，煤层开采后大面积悬露不易垮落，采场初次来压与周期来压均较强烈并释放大量弹性变形能，容易诱发冲击地压等灾害事故，因此研究采场坚硬顶板聚能与断裂破坏释放能量机理，对于坚硬顶板条件下煤层安全开采具有重要意义。本项目以坚硬顶板变形聚能与断裂能量释放诱灾机理为研究目标，围绕坚硬顶板的弯曲变形、断裂与破坏机理的关键科学问题，建立坚硬顶板弯曲变形蓄能与断裂释能的力学模型，揭示荷载大小（密集度）、地层刚度、岩梁抗弯刚度、顶板厚度、推进速度、采场长度、支承煤体破坏范围等对采场坚硬顶板能量聚集、释放演化的影响规律，提出坚硬顶板采场围岩控制的基本准则。本项目研究为科学预测与控制坚硬顶板运动诱发的相关动力灾害，保障开采安全提供理论依据与技术支持。

中文关键词： 坚硬顶板；变形；断裂；能量；模拟试验

英文摘要： High strength, highly integral and self-bearing ability are characteristics of hard roof.Large area suspends after the coal seam mining and does not easily fall down from worked out section in short term. First weighting and periodical weighting of stope are more intense and release large elastic deformation energy, which is easy to cause disaster accidents like rock burst. Therefore, the study of energy accumulation of hard roof in stope and energy release mechanism of fracture failure is very significant in coal seam mining safety under the condition of hard roof. Disaster mechanism of energy accumulation from hard roof deformation and energy release from fracture was targeted in this project research. Considering key and scientific problems like the bending deformation of hard roof, fracture and failure mechanism, mechanical model of energy accumulation from bend deformation of hard roof and energy release from fracture was established. By revealing influence law from load size ( intensity), strata stiffness, anti-bending stiffness of rock beam, hard roof thickness, the advancing speed, the length of stope mining and damage area of supporting coal on energy accumulation from hard roof in stope and release evolution, basic standard of stope surrounding rock control from hard roof was put forward. The studies i

英文关键词： hard roof；deformation；fracture；energy；simulation test