摘要
建立了某矿21201回采工作面底板渗流的力学模型,利用RFPA计算了工作面推进到50m和100 m时的应力场,利用应力与渗透特性之间的关系计算了底板各岩层的渗透特性,并计算了底板突水因数.研究表明:1)在工作面推进过程中,煤层底板始终没有出现渗流关键层.2)岩层孔隙一直是渗流的主要通道.3)当工作面推进到50 m时,突水因数等于0.834,底板中水渗流是稳定的,不会发生突水;当工作面推进到100 m时,突水因数等于0.928,底板可能产生渗流失稳现象,即存在突水的危险性.
A dynamical model for the seepage flow in the coal seam floor of working face No.21201 in a certain coal mine is established.The software,RFPA（Rock Failure Process Analysis） is used to calculate the stress field when the working face advances to 50 m and 100 m.In addition,permeability and water burst factors of floor rocks are also calculated.The result shows that 1） No seepage-key-stratum exists in the coal seam floor,2） the pores in strata are the main channel for water to seep in the coal seam floor,3） when the working face advanced for 50 m,the water burst factor is 0.834.In this case,the seepage is stable and no water burst will take place,and 4） when the working face advances for 100 m,the water burst factor is 0.928,which means that the seepage flow in the coal seam floor may be instable,and,as a result,water burst may take place.
出处
《采矿与安全工程学报》
EI
北大核心
2009年第1期78-81,共4页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(50674087)
教育部博士点学科专项基金项目(20060290504)
江苏省高校自然科学基础研究项目(08KJD130003)
徐州工程学院科研项目(XKY200606
XKY2007219)
关键词
底板
渗流
突水
渗透特性
coal seam floor
seepage flow
water inrush
seepage properties
