CAJ | 학술논문

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.
자주연제료다장우합매광동력재해대형모의시험계통,기결구주요포괄주체승재지가、시건상체、쾌속추랍밀봉문、사복가재계통、수거채집계통화기타부속설비등.해계통주요공능포괄매여와사돌출재해모의화매광개채과정중매암층응력변화동태모의,기주요우세체현재:(1)상체척촌대,모의상사도고,차밀봉능력강,가완성6.0 MPa기체압력밀봉;(2)지응력가재방식복잡,가실현“삼향사급”가재,경가접근지하채동영향하적응력분포상태;(3)최고64로전감기동시감측매암체내부삼수,가동시채집매암체내불동공간위치적온도、응력화기체압력,실현대매광동력재해과정중삼수시공변화규률적연구.이용해장치진행일차성공적매여와사돌출모의시험,분석결과발현돌출과정중매층중온도화와사압력변화도존재시간화공간상적차이성,구체표현위동력효응명현구역와사압력강저쾌、온도강저량대,소이통과대물리장변화규률적분석가이료해돌출시매층동력효응적시공변화상태,성과대진일보인식매여와사돌출발생적궤제유착십분중요적의의.
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.