摘要
随着我国煤炭开采深度的增大,承压水上开采工作面底板破断、突水灾害正呈逐年递增的趋势。以峰峰矿区九龙矿深部承压水上开采工作面底板为研究对象,通过现场底板取芯、编录和室内试验,获得承压水上工作面底板含水层分布特征及底板岩层的力学参数,确保试验中现场参数的可靠性。采用自行设计的工作面底板水压模拟装置,进行承压水上工作面回采过程中顶、底板破断失稳特征的相似模拟试验,得到底板工作面回采过程中顶、底板应力变化规律。运用非接触的光学测量技术对全场位移值进行观测,得出底板位移场变化规律。通过"下三带"理论,计算九龙矿深部工作面底板岩层的最大破坏深度、承压水导升高度和有效隔水层厚度。模拟试验结果表明:九龙矿深部承压水上工作面开采底板存在明显的"三带"特征,采用新型的承压水模拟装置可以模拟承压水在采动作用下的卸压过程。
The occurrences of breakage and water inrush disasters of working face floor under mining above aquifer are increasing with the mining depth in China.Taking the working face floor above deep aquifer in Jiulong Mine as the research object,by means of the core extraction,drill core logging and laboratory testing,the distribution laws of aquifers and mechanical parameters of each rock stratum of the working face floor above aquifer are obtained.Meanwhile,the reliability of parameters are ensured.The similar simulation test for fracture instability characteristics of working face roof and floor during the mining above aquifer are carried out by the self-designed confined water simulation equipment.And the stress variation laws of the roof and floor during working face mining are obtained.Using the noncontact optical measurement technology,the whole field displacement contours are measured.Base on the＇down three zones＇theory,the maximum failure depth of working face floor,the raise height of confined water and the thickness of effective confining rock strata in deep region of Jiulong Mine are calculated.The simulation results show that：the＇three zones＇appear in deep working face floor above aquifer in Jiulong Mine;and the new confined water simulation equipment can simulate the process of water pressure relief.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2011年第8期1571-1578,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点基础研究发展规划(973)项目(2010CB226801)
中央高校基本科研业务专项资金资助
北京市教育委员会共建项目建设计划
关键词
采矿工程
相似模拟试验
承压水上开采
底板
非接触光学测量
“下三带”理论
mining engineering
similar simulation test
mining above aquifer
floor
noncontact optical measurement
＇down three zones＇theory
