Solution for drill jamming problem in drilling process of raise boring machine

• Main Authors: HU ZHONGKUO, XU JIBO, QUE XIAOQIONG, TIAN ZHONG, TANG JIE, ZHANG YU, LIU JING, DAI ZHONGXIONG, LIANG JIAN, YANG ZENG
• Format: Patent
• Language: Chinese; English
• Published: 14.01.2020
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention provides a solution for a drill jamming problem in the drilling process of a raise boring machine. The solution includes the following steps that in the drilling process of the raise boring machine, when drill jamming occurs, lubricating oil is poured along a drill pipe of the raise boring machine and flows into a drilled finished hole along the outer wall of the drill pipe, after the lubricating oil infiltrates the finished hole, the raise boring machine is started for drilling continuously. According to the technical scheme, the lubricating oil is injected to infiltrate stone chips in the finished hole, oil films are formed on the surfaces of the stone chips, then the interlocked and occluded states of stone chip particles are changed, and surface friction among the particles is reduced, so that a jammed or locked drill can be loosened, smooth implementation of the construction technology is guaranteed, and the foundation is laid for improvement of the construction efficiency. Besides, prefera