村庄等建筑物保护煤柱内巷道布置的沉陷影响研究

我国村庄等建筑物下压煤情况非常常见，为减少巷道的掘进长度、保证采区规划的方正与规整性、尽早出煤获得经济效益，许多矿井将开拓或准备巷道布置在村庄等建筑物的保护煤柱内。为解决村庄等建筑物保护煤柱内巷道布置的地面沉陷预计问题，提出将概率密度函数法用于建(构)筑物保护煤柱内巷道布置的地表沉陷预计中，同时对保护煤柱内巷道布置完全垮塌后地表下沉率、拐点偏移距等参数选取问题进行了探讨，并借助Matlab程序平台对巷道布置的地表移动变形进行了研究。研究及工程应用表明，概率密度函数法及极不充分采动条件下的巷道布置地表沉陷参数选取体系适用于村庄等建筑物保护煤柱内巷道布置的地表沉陷预计工作|结合砖混结构房屋建筑的极限拉伸变形值研究成果，得到保护煤柱内三条巷道布置的地表最大沉陷值约为双巷布置的1.24倍。

Study on subsidence effect of roadway layout in protective coal pillar for buildings such as villages

Many mines optimize their development or prepared roadway in protective coal pillar for buildings such as villages. To solve the problem of prediction for surface subsidence of roadway in protective coal pillar for buildings such as villages, the authors put forward the probability density function method in surface subsidence prediction of roadway layout in protective coal pillar for buildings, and the paper studied the parameters’ selection of surface subsidence rates and deviation of inflection point in the protective coal pillar roadways layout after it’s sheared. With the aid of Matlab platform, this paper studied surface movement deformation under this situation. Research and engineering application show that the probability density function method and surface subsidence parameters selection system of sub-critical mining condition for used for roadway layout in protective coal pillar of buildings is very appropriate. Combining research results of surface ultimate tensile deformation value for brick-concrete structure buildings, maximum surface subsidence value on condition of three roadway layout is about 1.24 times of double roadway layout in protective coal pillar.