JCIPRNET
Stress-transfer method in tunnel with high ground pressure based on fracturing ring
A stress-transfer method in tunnel with high ground pressure based on fracturing ring. According to the stress source of the tunnel, fracturing by drilling holes to form artificial weaken zones in surrounding rocks, that's named fracturing ring. The fracturing ring is the weaken zone with some width, whose inner boundary is the protective circle. The fracturing ring with small width is called the cutting and interruption circle and the cutting or interruption arc. The radius of the protective circle is determined by setting a certain width of safety coal pillar barriers at the edge of a support body. The radius of the fracturing ring is determined by the surrounding rock structure and the stress conditions as well as the construction technology. Usually, the higher the stress, the wider the radius of the fracturing ring. The cutting and interruption circle or arc could cut off all of the targeted rock which transmits the stress.
China University of Mining and Technology XUZHOU USURE MINING TECHNOLOGY CO., LTD
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E21B E21C E21F E21D
inventional inventional inventional additional
Xinglong Shuliang Bingxiang Jiangwei
Zhao Chen Huang Liu