Air Injection and Hot-film Flow Logging for Evaluation of Roof Cracks in White Pine Mine.
Chan-SSM; Thomas-HE; Bada-N
Trans Soc Min Eng AIME 1974 Jun; :131-137
The Bureau of Mines has developed a technique for locating and evaluating bedding plane cracks in mine roof by an air-injection and hot-film flow logging process. It is ultrasensitive to cracks and is especially useful for detecting the early stage of crack development. The required equipment is inexpensive and simple to operate.
Trans. Soc. Min. Eng., AIME, June 1974, PP. 131-137