采动支承压力引起应变型冲击地压能量判据研究

发布时间：2018-10-10 11:52

【摘要】：采动支承压力引起的能量积聚及其突发释放是导致应变型冲击地压发生的根源之一。在将工作面前方煤体划分为阻力区、驱动区和无明显影响区的基础上,把应变型冲击地压从孕育到发生全过程分为能量稳定积聚、能量平衡和能量非稳定释放3个阶段,并研究其发生的基本条件;建立了采动支承压力引起应变型冲击地压的能量判据,即认为力学平衡状态破坏时驱动区煤体释放的弹性应变能与阻力区煤体完全破坏消耗能量的比值大于1。从冲击地压防治角度出发,提出了阻力区临界宽度的概念,建立了以阻力区宽度为指标的应变型冲击地压发生判据。现场实测表明,本文所建立的能量判据和指标与实测结果相吻合。其研究成果可为采动支承压力引起应变型冲击地压的预测预报和防冲、减冲工作的实施提供依据。
[Abstract]:The energy accumulation caused by mining support pressure and its sudden release are one of the root causes of strain type rock burst. On the basis of dividing coal body in front of face into resistance zone, driving area and no obvious influence area, the whole process of strain type impact ground pressure is divided into three stages: steady accumulation of energy, energy balance and unsteady release of energy. The basic conditions of its occurrence are studied, and the energy criterion of strain type rock burst caused by mining support pressure is established. It is considered that the ratio of elastic strain energy released by the driving coal body to the energy consumed by the complete destruction of the coal body in the resistance zone is greater than 1 when the mechanical equilibrium state is destroyed. In this paper, the concept of critical width of resistance zone is put forward from the point of view of the prevention and treatment of shock ground pressure, and the criterion of the occurrence of strain type rock burst is established, which takes the width of resistance zone as the index. The field measurement shows that the energy criterion and index established in this paper are in good agreement with the measured results. The research results can provide the basis for prediction and anti-scour of strain-type shock ground pressure caused by mining support pressure, as well as for the implementation of anti-scour work.
【作者单位】：山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地;中国地质大学(武汉)资源学院;
【基金】：国家自然科学基金项目(No.51274133,No.51474137,No.51574154) 山东省自然科学基金重点项目(No.ZR2012EEZ002) 高等学校博士学科点专项科研基金(No.20123718110013) 山东省科技发展计划项目(No.2014GSF120002) 山东省泰山学者工程专项经费资助~~
【分类号】：TD324

【相似文献】