WANG Jing ming, YANG Yong lin, WANG Shang ling, WU Su zhen, DING Ke qin. 2000: EVALUATION OF ROCK MASS QUALITY ABOUT THE COAL FLOOR OF WORKING FACE 651 IN LIUQIAO COAL MINE. JOURNAL OF ENGINEERING GEOLOGY, 8(4): 462-465.
    Citation: WANG Jing ming, YANG Yong lin, WANG Shang ling, WU Su zhen, DING Ke qin. 2000: EVALUATION OF ROCK MASS QUALITY ABOUT THE COAL FLOOR OF WORKING FACE 651 IN LIUQIAO COAL MINE. JOURNAL OF ENGINEERING GEOLOGY, 8(4): 462-465.
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    EVALUATION OF ROCK MASS QUALITY ABOUT THE COAL FLOOR OF WORKING FACE 651 IN LIUQIAO COAL MINE

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