采矿与安全工程学报Issue(3)：469-475,7.
湿度应力场作用下煤矿穿膨胀岩钻孔缩径规律研究
Study on coalmine boreholes shrinkage rule crossing swelling rock under the humidity stress field
摘要
Abstract
In response to the issue of boreholes shrinkage crossing swelling rock in coal mine, in this paper,based on the humidity stress field theory, analytical solution of boreholes displacement consid-ering humidity damage and expansion has been deduced by using finite element analysis program and introducing humidity corrected coefficientψ(w).So,the effects of the humidity field and stress field on boreholes shrinkage are systematically studied and analyzed by the software ANSYS and similar model experiment. The results show that with the water ratio of surrounding rock increasing, the wall dis-placement of boreholes is nonlinearly growing;the wall is“dumbbell-shaped”with two ends crude and intermediate fine;the maximum radial displacement is in the central wall of the boreholes;the effect of lithology softening resulting from the boreholes shrinkage is obvious;as ground stress increases, the wall displacement of borehole increases linearly but has a small increase;the above two fields have enormous effects on boreholes shrinkage. As far as the degree of influence is concerned, humidity field causes the larger influence, followed by stress field.关键词
膨胀岩/钻孔缩径/湿度应力场/相似模型实验Key words
swelling rock/boreholes shrinkage/humidity stress field/similar model experiment分类
矿业与冶金引用本文复制引用
卢义玉,侯吉峰,尤祎,葛兆龙,张磊,敖翔..湿度应力场作用下煤矿穿膨胀岩钻孔缩径规律研究[J].采矿与安全工程学报,2014,(3):469-475,7.基金项目
国家科技重大专项项目(2011ZX05065-3)；教育部长江学者和创新团队发展计划项目(IRT13043) （2011ZX05065-3）
