EXPERIMENTAL STUDY OF VARIATION LAW OF SATURATED BROKEN MUDSTONE POROSITY DURING CREEP PROCESS
MA Zhanguo1，2，LAN Tian2，PAN Yinguang2，MA Jigang2，ZHU Fahao2
(1. State Key Laboratory for Geomechanics and Deep Underground Engineering，China University of Mining and Technology， Xuzhou，Jiangsu 221008，China；2. School of Sciences，China University of Mining and Technology， Xuzhou，Jiangsu 221008，China)
Abstract：Broken rock shows obvious creep properties. Creep causes the continuous variation of porisity as well as the seepage characteristics. The variation law of saturated broken mudstone porosity during creep process is studied by using the self-developed multiphase coupling creep test device. The results show that during the creep process of the broken mudstone，the porosity has a negative exponential relation with time，and the complete process can be divided into several obvious stages；when the load is the same，the smaller the mudstone particle size is，the smaller the variation of the mudstone porosity is，and the larger the final porosity is. As the load increases，the difference of the porosity caused by the different mudstone particle sizes becomes smaller；under the condition of the same mudstone particle size，the porosity of the mudstone has a quicker variation under bigger loads.
马占国,兰天，潘银光，马继刚，朱发浩. 饱和破碎泥岩蠕变过程中孔隙变化规律的试验研究[J]. 岩石力学与工程学报, 2009, 28(07): 1447-1454.
MA Zhanguo1，2，LAN Tian2，PAN Yinguang2，MA Jigang2，ZHU Fahao2. EXPERIMENTAL STUDY OF VARIATION LAW OF SATURATED BROKEN MUDSTONE POROSITY DURING CREEP PROCESS. , 2009, 28(07): 1447-1454.
