APPROACHMENT TO THE ENGINEERING GEOLOGY ABOUT THE FREEZING PROCESS OF A SKIP-COMBINATION SHAFT IN LIUDONG COAL MINE

After comprehensive researches on the lithological characters of the test hole,dynamic pressure, geostatic pressure,stability prognosis around the well,fuzzy cluster analysis and mathematic analog,the writer gave the engineering geological demonstration on the suitability of freezing process and the rationality of freezing depth of the skip-combination shaft in Liudong coal mine, which brought about notable economic results.