采矿与安全工程学报Issue(4)：620-623,630,5.
考虑节理几何特征的地表沉陷预计方法
The prediction method for surface subsidence considering the geometrical characteristics of joints
摘要
Abstract
The similar material simulation test results show that the overlying joint rock mass subsi-dence caused by underground coal mining appears skewness characteristics. The geological and mathe-matical model considering the joint angle, trace length and the trace width is established and the proba-bility distribution function of the overlying joint rock mass subsidence caused by the underground coal mining is deduced by using the random medium theory. At the same time, the probability distribution of surface subsidence caused by mass mining is assumed to be in accordance with the n-Bernoulli trial dis-tribution. The n-Bernoulli trial distribution is equivalent to Poisson distribution when n is equal to or larger than ten. The overlying joint rock mass prediction equations considering the continuity of surface subsidence are proposed based on Gamma distribution (expanded version of Poisson distribution). The comparison between the results of surface subsidence computed by the model calculation and those measured by the similar material simulation experiment has shown that the presented model can predict a single set of joint rock mass subsidence caused by the underground coal mining with relatively good accuracy, which provides technical support for mining subsidence forecasting and strata movement monitoring.关键词
煤炭开采/节理岩体/地表沉陷/偏态/Gamma分布Key words
coal mining/jointed rock mass/surface subsidence/skewness/Gamma distribution分类
矿业与冶金引用本文复制引用
袁长丰,袁子晋,刘世波,李国龙,李亮,于广明..考虑节理几何特征的地表沉陷预计方法[J].采矿与安全工程学报,2014,(4):620-623,630,5.基金项目
国家自然科学基金项目(51174124，51274126，51179080) （51174124，51274126，51179080）
