Faculty of Resource and Safety Engineering,China University of Mining and Technology (Beijing),Beijing　 100083,China

为了研究风化泥岩裂缝涌水及扩展变化规律,研发了一种岩石裂缝涌水扩展试验装置。通过对赵固一矿现场岩样进行干燥饱和吸水率、点荷载强度等试验分析了不同层位风化泥岩的物理性质,根据物理性质的差异制作了两组风化泥岩岩石试件,并采用X射线衍射(XRD)试验测试了试件的矿物组成成分。通过设置不同的注水压力和裂缝宽度对两组岩石试件进行风化泥岩裂缝涌水及扩展模拟试验,得出了试验含水层水压力和裂缝通道涌水量的变化规律,并探讨了注水压力、裂缝宽度和岩石物理性质对风化泥岩裂缝扩展的影响,总结出水流作用下风化泥岩裂缝扩展规律。

In order to study the water burst and extension law of weathered rock crack,a testing apparatus of rock min- ing-crack extension under water flow has been developed. The physical features of weathered mudstone located in dif- ferent positions were analyzed through some basic physical tests which include saturated water absorptivity,point load intensity etc. Using two groups of rock specimens according to the difference of their physical features,the composition of rock sample was tested through X-ray diffraction (XRD) experiment. The experiment of water burst and extension law of crack was conducted through setting up different water injection pressures and crack widths with the two groups of rock specimens. The study obtained the change rule of water pressure and water inflow,discussed the influence of water injection pressure,crack width and physical properties of rock on crack extension,and summarized the crack ex- tension law of weathered mudstone.

国家重点基础研究发展计划(973)资助项目(2013CB227903)；国家自然科学基金煤炭联合基金重点资助项目(U1361209)；国家自然科学基金资助项目(51004109)；

Li Jianghua,Xu Yanchun,Dong Jianping,et al. Experimental research on water burst and extension law of weathered mudstone crack[J]. Journal of China Coal Society,2016,41(4):984-991.