Method and system for predicting boulder lying ahead in tunneling progression of tunnel boring machine

Provided are a method and system for predicting a boulder lying ahead in tunneling progression of a tunnel boring machine. The method comprises: determining a torque coefficient of a tunnel boring machine according to a cutterhead torque which is collected during tunneling of the tunnel boring machi...

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Bibliographische Detailangaben
Hauptverfasser:	Tianxiang Xie, Jianping Sun, Hongyu Liu, Guoxing Xie, Zhizhong Li, Qiang Liu, Fangshuo Tong, Xiaodi Liu, Baizheng Pei, Guangyu Cui, Hongyan Mo, Huaidong Wang
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ELECTRIC DIGITAL DATA PROCESSING FIXED CONSTRUCTIONS MEASURING MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PHYSICS TESTING
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Beschreibung
Zusammenfassung:	Provided are a method and system for predicting a boulder lying ahead in tunneling progression of a tunnel boring machine. The method comprises: determining a torque coefficient of a tunnel boring machine according to a cutterhead torque which is collected during tunneling of the tunnel boring machine, so as to calculate a theoretical torque during tunneling of the tunnel boring machine; in response to a change in the cutterhead torque which is greater than 10% of the theoretical torque, determining that the tunnel boring machine encounters a boulder during tunneling; and on the basis of a preset boulder prediction model, determining the position and the size of the boulder according to the rotating speed of a cutterhead and a tunneling speed during tunneling of the tunnel boring machine. Therefore, by means of the roller cutter stress, tunneling speed and cutterhead torque during tunneling of a tunnel boring machine, whether the tunnel boring machine encounters a boulder during tunneling and the position and the size of a boulder encountered in front of the tunnel boring machine can be effectively determined. The method has simple operation and low costs, and can conveniently and quickly predict a boulder, thereby ensuring the tunneling safety of the tunnel boring machine.