复杂煤岩体结构动力失稳多参量预报方法研究

发布时间：2018-01-14 04:14

本文关键词：复杂煤岩体结构动力失稳多参量预报方法研究　出处：《西安科技大学学报》2016年03期 　论文类型：期刊论文

【摘要】：针对煤岩体在开采扰动影响下由于动力载荷的作用将发生复杂的运动演化过程,形成新的更为复杂的煤岩体结构。煤岩体结构所受的应力水平变化特异,煤岩体结构在高应力强卸荷作用下结构发生严重畸变,出现煤岩体结构动力失稳、冲击地压、大面积片帮和大体积冒顶等动力失稳现象,且煤岩体结构动力失稳始终随着采动煤岩层的时空演化而发生着动态运动,危险源产生的位置、时间具有不确定性,存在自由面的煤层、采场、巷道、掘进工作面等围岩结构空间都有发生动力失稳的可能,因此导致了动力失稳危险源的搜索范围广泛、定位难度较大,采用单一手段难以满足监测预报的要求。本论文基于能量积聚和释放的围岩结构动力失稳前兆信息研究,利用应力、应变、声发射、钻孔窥视等声、光、电监测手段,通过多参量信息的综合分析,提出复杂煤岩体结构动力失稳多参量动力失稳预测方法。
[Abstract]:Under the influence of mining disturbance, coal and rock mass will undergo complex motion and evolution process due to the effect of dynamic load, forming a new and more complex coal and rock mass structure. The stress level of coal and rock mass structure is special. Under the action of high stress and strong unloading, the structure of coal and rock mass has serious distortion, such as dynamic instability of coal and rock mass structure, impact ground pressure, large area cover and large volume roof fall. The dynamic instability of coal and rock mass structure always occurs dynamic movement along with the temporal and spatial evolution of coal and rock strata. The location and time of danger source is uncertain, and there are free surface coal seam, stope, roadway. Driving face and other surrounding rock structure space have the possibility of dynamic instability, which leads to a wide range of search for dynamic instability risk sources, difficult to locate. It is difficult to meet the requirements of monitoring and forecasting by single means. Based on the energy accumulation and release of surrounding rock structure dynamic instability precursor information, using stress, strain, acoustic emission, borehole peek and other sound, light. Based on the comprehensive analysis of multi-parameter information, a multi-parameter dynamic instability prediction method for complex coal and rock structures is proposed by means of electrical monitoring.
【作者单位】：西安科技大学能源学院;教育部西部矿井开采及灾害防治重点实验室;
【基金】：国家自然科学基金(煤炭联合基金)重点项目(U13612030) 陕西省重点科技创新团队计划(2013KCT-16) 博士启动基金(2014QDJ069) 博士培育基金(2014051)
【分类号】：TD313
【正文快照】： 0引言复杂煤岩体结构动力失稳现象发生频繁,动力灾害时有发生。随采深增加与开采强度的加大,动力灾害发生频次上升,大洪沟矿(采深350m)累计发生10多次动力失稳破坏现象,乌东煤矿发生动力灾害,造成1死2伤;碱沟煤矿和小红沟煤矿也有类似灾害发生,河南义马煤业集团千秋煤矿发生动

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