多场耦合煤矿动力灾害大型模拟试验系统研制与应用  

DEVELOPMENT AND APPLICATION OF MULTIFIELD COUPLING TESTING SYSTEM FOR DYNAMIC DISASTER IN COAL MINE

作　　者：刘东[1,2] 许江[1,2] 尹光志[1,2] 王维忠[1,2] 梁永庆[1,2] 彭守建[1,2] 

机构地区：[1]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044 [2]重庆大学复杂煤气层瓦斯抽采国家地方联合工程实验室,重庆400044

出　　处：《岩石力学与工程学报》2013年第5期966-975,共10页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家科技重大专项项目(2011ZX05034–004);国家重点基础研究发展计划(973)项目(2011CB201203);国家自然科学基金资助项目(50974141)

摘　　要：自主研制了多场耦合煤矿动力灾害大型模拟试验系统,其结构主要包括主体承载支架、试件箱体、快速推拉密封门、伺服加载系统、数据采集系统和其它附属设备等。该系统主要功能包括煤与瓦斯突出灾害模拟和煤矿开采过程中煤岩层应力变化动态模拟,其主要优势体现在:(1)箱体尺寸大,模拟相似度高,且密封能力强,可完成6.0 MPa气体压力密封;(2)地应力加载方式复杂,可实现"三向四级"加载,更加接近地下采动影响下的应力分布状态;(3)最高64路传感器同时监测煤岩体内部参数,可同时采集煤岩体内不同空间位置的温度、应力和气体压力,实现对煤矿动力灾害过程中参数时空变化规律的研究。利用该装置进行一次成功的煤与瓦斯突出模拟试验,分析结果发现突出过程中煤层中温度和瓦斯压力变化都存在时间和空间上的差异性,具体表现为动力效应明显区域瓦斯压力降低快、温度降低量大,所以通过对物理场变化规律的分析可以了解突出时煤层动力效应的时空变化状态,成果对进一步认识煤与瓦斯突出发生的机制有着十分重要的意义。Multifield coupling test system for dynamic disaster in coal mine was independently developed;the system mainly consists of bearing skeleton frame,specimen box,rapid response door for sealing,servo loading system,data acquisition system and other auxiliary equipments.The test system could be used for simulation of coal and gas outburst disaster and dynamic state of stress during coal mining;its main advantages are reflected in：（1） Large size of specimen box makes simulation closer to the reality,and it is designed in high sealing pressure（up to 6.0 MPa）.（2） It can provide complex loading called three-dimensional and multilevel loading,which is closer to the state of stress distribution in the underground mining.（3） Up to 64 sensors are used to collect coal/rock parameters such as temperature,stress and gas pressure of the different spatial positions,in order to research the temporal and spatial evolution of the coal/rock parameters in the process of the coal mine dynamic disaster.A successful simulation test of coal and gas outburst by using the test system was made;the result indicates that the temperature and the gas pressure in the coal seam both show diversity in temporal and spatial variation,specific performance in the rapid pressure drop and the great temperature reduction in the obvious dynamic effect area of the coal seam.So the evolution of physical field,in a manner,indicates the space-time development status of the coal seam dynamic effect.The result means much to further understand the coal and gas outburst mechanism.

关 键 词：采矿工程 煤矿动力灾害 模拟 瓦斯压力 数据采集 多场耦合 

分 类 号：TD32[矿业工程—矿井建设]