摘要
为了进一步弄清煤与瓦斯突出发生的原因及演化规律,在分析突出现象和已有研究成果的基础上,明确了突出的地质动力系统构成,分析了地质动力系统的演化过程,并构建了地质动力系统的失稳判据.研究结果表明:含瓦斯煤体是突出的物质基础,地质动力环境为突出营造了高构造应力、低强度煤岩体、高瓦斯赋存环境,而采掘扰动为突出提供了激发动力和空间条件;突出的发生需经历地质动力系统的孕育、形成、发展和终止等演化过程;突出的发生需满足地质动力系统形成的力学判据C_1;失稳力学判据C_2和能量判据C_3;利用地质动力系统判据能够揭示典型煤与瓦斯突出事故的发生机理,为掘进工作面突出的预测和防治提供了依据.
To further clarify the reason and evolution of the outburst occurrence,this paper put forward a geological dynamic system on the basis of analyzing the outburst phenomenon and the existing research results.The evolution process of the geological dynamic system was explored,and the criteria for formation and development of geological dynamic system was constructed.Results show that coal-gas medium is the material basis of outburst.The dynamic environment creates a setting of high tectonic stress,low coal rock strength and high gas occurrence for outburst,while the mining disturbance provides excitation power and space conditions.The occurrence of outburst needs to be experienced by the evolution,formation,development and termination of the geology dynamic system.This process needs to satisfy the formation criterion C_1 of geological dynamic system,and the development needs to satisfy the in-stability criterion C_2 and energy criterion C_3.It is possible to reveal the occurrence mechanism of typical coal and gas outburst accidents by using the criterion of geological dynamic system,which provides the basis for the prediction and prevention of outburst in heading face.
作者
罗明坤
范超军
李胜
杨振华
张浩浩
杨鸿智
兰天伟
LUO Mingkun;FAN Chaojun;LI Sheng;YANG Zhenhua;ZHANG Haohao;YANG Hongzhi;LAN Tianwei(College of Mining Engineering, Liaoning Technical University, Fuxin,Liaoning 123000, China;State and Local Joint Engineering Laboratory for Gas Drainage and Ground Control of Deep Mines, Jiaozuo,Henan 454003, China;State Key Laboratory for GeoMechanics and Deep Underground Engineering, Xuzhou, Jiangsu 221116, China)
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2018年第1期137-144,共8页
Journal of China University of Mining & Technology
基金
国家重点研发计划项目(2016YFC0801407-2)
国家自然科学基金项目(51674132)
深部岩土力学与地下工程国家重点实验室开放基金项目(SKLGDUEK1510)
深井瓦斯抽采与围岩控制技术国家地方联合工程实验室开放基金项目(G201602)
关键词
煤与瓦斯突出
突出机理
地质动力系统
失稳判据
演化规律
coal and gas outburst
mechanism of outburst
geological dynamic system
failure criterion
evolution law
