APPLICATION OF GEOPHYSICAL LOGGING TECHNIQUES TO INVESTIGATION OF ROCK MASS ENGINEERING IN COAL MINE
YE Genxi1，2，3，HATHERLY P3，JIANG Fuxing1，PAYNE D4，MEDURST T5
(1. Key Laboratory of High-efficient Mining and Safety of Metal Mines，Ministry of Education，University of Science and Technology Beijing，Beijing 100083，China；2. Jiangsu Huadong Geological Construction Group，Nanjing，Jiangsu 210007，China； 3. University of Sydney，Sydney，Australia；4. Crinum Mine，BHP Mitsubishi Alliance，Queensland，Australia； 5. PDR Engineers，Cairns，Australia)
Abstract：The current application of geophysical logging technique to the investigation of rock mass engineering in coal mine，especially the geophysical strata rating(GSR)，is introduced. GSR is mainly based on sonic logging data(density and gamma logs are used simultaneously)；and the formulation relies on a geomechanical understanding of the factors(bedding or fracture) that influence sonic velocity，and does not attempt to estimate rock strength，rather to provide a method for estimating the quality of rock mass quantificationally and comprehensively. Engineering practice indicates that geophysical logging technique with its innate ability has been playing a helpful role in quantitatively identifying the rock mass quality and changes in rock mass，such as delineating the range of soft rock，recognition of key strata，and exploration of potential regions of water inrush. It also comes to the conclusion by comparison that GSR is more reliable than uniaxial compressive strength which is used only in quantitative description of sedimentary rock. Seismic prospecting is also employed to bridge the gap among boreholes and is helpful to understand what is going on there. A new academic thought of geophysically quantitatively describing rock mass quality，namely，it is possible to statically quantitatively describe the rock mass with geophysical logging technique before mining，and dynamically quantitatively describe the rock strata movements associated with mining during retreating with microseismic monitoring or electromagnetic radiation.
叶根喜,HATHERLYP，姜福兴，PAYNED，MEDURSTT. 地球物理测井技术在煤矿岩体工程勘察中的应用[J]. 岩石力学与工程学报, 2009, 28(07): 1342-1352.
YE Genxi1，2，3，HATHERLY P3，JIANG Fuxing1，PAYNE D4，MEDURST T5. APPLICATION OF GEOPHYSICAL LOGGING TECHNIQUES TO INVESTIGATION OF ROCK MASS ENGINEERING IN COAL MINE . , 2009, 28(07): 1342-1352.
