Finally, the distribution law of stress filed and the causes of goaf cavingzone were analyzed according to the primary stress nephogram.
最后从主应力云图来分析了采空区内部的应力场分布规律及空区垮落带形成的原因。
2
Describes the methods of reinforcing roof of the plank and surrounding rock by using pipe-burying filling, to mak them as a whole, so as to go-through the cavingzone safely and smoothly.
A coal mining method with a combination of a slicing and caving, a double benefit in control of water conducted crack zone development and in reduction of coal production cost can be obtained.