摘要
为避免开采对其上地表处路基沉降影响,提出直接顶板爆破、充填开采、充填开采+顶板爆破的采空区处理方案。根据规定设路基沉降限值为0.3 m,充实率为0.85、0.9和0.95。引入了PFC3D爆炸模型模拟爆破,提出充填体的模拟方法,对7种方案进行模拟。模拟结果表明:火成岩4在岩层运移过程中起着抑制上覆岩层移动的作用。充填开采+顶板爆破对地面沉降的影响明显小于只使用充填开采。得到了符合沉降要求的采空区处理方案:充填开采(充实率为0.9,0.95)、充填开采+顶板爆破(充实率0.85,0.9,0.95)。
To avoid that mining impacts on the settlement of above highway roadbed, goaf treatment schemes were put forward, such as roof blasting, filling mining and filling mining＋roof blasting. According to the rules it is set that the subgrade settlement limit is 0.3 m, and filling rate is 0.85, 0.9 and 0.95. PFC3D explosion model to simulate the blasting was introduced, 7 schemes were put forward for simulating methods of filling body, and the 7 schemes were implemented. The simulation results show that the igneous rock 4 in rock migration process has the function of inhibitting the movement of the overlying strata. The influence of filling mining ＋ roof blasting on the land subsidence is obviously lower than using the filling mining alone. The goaf treatment schemes meeting the requirements to limit the settlement are： Filling mining （filling rate is 0.9 and 0.95）, and filling mining ＋ roof blasting （filling rate is 0.85, 0.9 and 0.95）.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2016年第11期2723-2728,共6页
Journal of System Simulation
基金
国家自然科学基金(51274113
51274110
51474121
U1361211)
关键词
采空区处理
既有路基
沉降控制
模拟研究
goaftreatment, existing highway subgrade, settlement limit, simulation and study
