文献类型：期刊文献

中文题名：深部动力灾害诱发机理及影响因素研究

英文题名：Discussion on mechanism and influencing factors of deep dynamic disaster

作者：郭怀广 朱立凯

第一作者：郭怀广

机构：[1]河南省瓦斯地质与瓦斯治理重点实验室——省部共建国家重点实验室培育基地,河南焦作454003;[2]中煤科工集团沈阳研究院有限公司,辽宁沈阳110016;[3]贵州理工学院矿业工程学院,贵州贵阳550003

第一机构：河南省瓦斯地质与瓦斯治理重点实验室——省部共建国家重点实验室培育基地,河南焦作454003

年份：2021

卷号：49

期号：5

起止页码：175-181

中文期刊名：煤炭科学技术

外文期刊名：Coal Science and Technology

收录：CSTPCD;;EI(收录号：20222112144406);北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：国家重点研发计划资助项目(2017YFC0804207);辽宁省自然科学基金资助项目(2019-ZD-0906);河南省瓦斯地质与瓦斯治理重点实验室开放基金资助项目(WS2020B08)。

语种：中文

中文关键词：动力灾害;煤与瓦斯突出;煤体失稳

外文关键词：dynamic disasters;coal and gas outburst;coal instability

摘要：针对深部动力灾害诱发机理及影响因素复杂的问题,以红阳二矿动力灾害为背景,宏观统计了灾害空间分布规律,开展了不同参数条件下的动力灾害相似模拟试验,进而研究灾害诱发机理及影响因素。结果表明:红阳二矿煤与瓦斯突出分布存在着明显的区域性,突出发生主要集中在地应力较高区域或地应力急剧变化区域,突出次数和突出能力均随埋深的增加而增加,相对于倾出和压出,典型突出的变化规律更加明显;获得了红阳二矿突出强度、突出距离及相对突出强度与瓦斯压力、放散初速度指标之间的拟合经验关系;灾害性质随瓦斯压力增加发生转变(倾出-压出-典型突出),瓦斯压力是红阳二矿动力灾害诱发的主导因素;动力灾害诱发的关键在于煤体具有足够的瓦斯梯度,地应力对突出的1个重要作用在于地应力的快速释放能够使突出发生所需的瓦斯压力临界值降低;瓦斯放散初速度Δp对于突出强度有着明显正向影响作用;倾出和压出可视为煤体经过一定的破坏累积准备阶段后,发生的一次性破坏失稳,典型突出发动的关键在于具有高突出潜能的煤体和具有充分的瞬间释放条件,典型突出的全过程可视为煤体的力学失稳和高潜能突出煤体持续发展;动力判定指标C_(m)满足时,发生典型煤与瓦斯突出;若C_(m)不满足条件,则意味着突出潜能不足,对于局部发育或应力集中的软弱煤体,将发生倾出或压出灾害。
Aiming at the complex problems of the inducing mechanism and influencing factors of deep dynamic disasters,based on the dy?namic disaster of Hongyang No.2 Coal Mine,the spatial distribution of disasters was calculated,and similar simulation experiments of dy?namic disasters under different parameter conditions were carried out to study the mechanism and influence of disaster inducing factor.The results show that:the dynamic disaster of Hongyang Coal Mine is mainly concentrated in the high stress and stress concentration area with obvious regional features.Compared with pour out and press out,the change rule of typical prominence is more obvious.The fitting empiri?cal relations between outburst intensity,distance and relative outburst intensity,gas pressure and initial velocity of emission in Hongyang Coal Mine are obtained.With the increase of gas pressure dynamic disasters changed(pour out-delivery-typical outburst),the critical val?ue of gas pressure needed for outburst can be reduced by the quick release of in-situ stress,the index(Δp)has a significant positive effect on the outburst intensity.Pour out and delivery can be treated as coal after certain damage accumulation stage,the one-time failure instability,the key to highlight the launch is typical has high potential of coal and has good moment release conditions,outstanding process can be regarded as typical coal mechanical instability and high potential to highlight sustainable development of coal.When the dy?namic determination index C_(m)meet simultaneously,typical coal and gas outburst occurs.If C_(m)is not satisfied soft coal bodies with local development or stress concentration will suffer from dumping or compression disasters.