煤巷掘进影响区动态应力响应及对动力灾害影响研究
[Abstract]:Based on theoretical analysis, experimental research and numerical simulation, the dynamic stress response and its influence on dynamic disasters in the affected area of coal roadway tunneling are studied by using the research idea of "hypothesis-proof-conclusion-suggestion". The paper puts forward that the dynamic response of mining stress caused by tunneling is an important influence factor of coal and rock dynamic disasters, and makes use of elastic mechanics. Combining with the theory of rock pressure, the dynamic response model of mining stress caused by tunneling is established through the mechanical analysis of the micro-element of coal in the area affected by tunneling, and the dynamic characteristics of mining stress in the affected area of roadway excavation are proved theoretically. In this paper, a three dimensional simulation experiment system is developed to simulate dynamic tunneling with adjustable velocity and controllable speed, which provides the experimental basis for the research of this paper. It is verified by experiments that the dynamic and tensile characteristics of mining stress in coal roadway engineering, the difference of mining stress and the response of compressible dynamic stress in the process of continuous tunneling, and the alternating variation of mining stress in intermittent tunneling; The influence mechanism of dynamic stress response on coal and rock dynamic disaster is put forward and the prevention measures are put forward. The study shows that the dynamic stress of mining under different tunneling velocities is dynamic to different degrees, and the dynamic response of mining stress caused by tunneling is an important factor of coal and rock dynamic disasters caused by dynamic response of mining stress and increased concentration stress on the shortened coal pillar.
【学位授予单位】:中国矿业大学(北京)
【学位级别】:博士
【学位授予年份】:2014
【分类号】:TD263;TD77
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