突出煤层槽硐周围煤体的应力与应变  

Stress and strain observed in coal body around slots produced by hydraulic cutting technology in outburst coal seams

作　　者：刘锡明[1] 周静[1] 武立斌 

机构地区：[1]黑龙江科技大学安全工程学院,哈尔滨150022 [2]双鸭山建龙集团建龙矿业有限公司,黑龙江双鸭山155100

出　　处：《黑龙江科技大学学报》2015年第1期1-5,共5页Journal of Heilongjiang University of Science And Technology

基　　金：黑龙江省教育厅科学技术研究项目(11553090)

摘　　要：为研究水力掏槽技术在突出煤层中实现快速掘进,分析槽硐周围煤岩的应力与应变、煤体弹性模量与竖固性系数的关系。利用ANSYS有限元软件建立水力掏槽槽硐数值模型,分析槽硐横向、竖向剖面周围煤岩体应力、应变云图。结果表明:槽硐周围煤体在应力重组作用下,径向、轴向应力集中带均向深部移动;距离槽硐不同位置测点,煤体应力、应变均呈规律性变化;同一剖面上距离槽硐中心径向距离越大,煤岩位移量、应变、应力变化越小;距离槽口轴向距离越大,煤岩位移量、应变、应力变化越大,但是超过一定距离后,又逐渐减小。现场实验结果验证了理论分析和数值模拟结果的准确性。This paper is meant to investigate the mechanism behind the outburst protection using hy- draulic cutting technology, as is required for more rapid excavation in outburst coal seam. The specific investigation is best attained by analyzing the relationship between stress and strain, and between elastic modulus of coal and consistent coefficient; developing the numerical model for the holes produced by hy- draulic cutting technology using ANSYS finite element software; and analyzing the law underlying the change in the stress and strain occurring in the coal and rock mass around the transverse and vertical sec- tions of holes. The results show that under the action of recombined stress induced by cutting, coal body around is exposed to the radial and axial stress concentrated zone moving to deeper place; a larger radial distance from the hole center on the same profile means a smaller change in the displacement, strain, and stress observed in coal and rock, of the coal ; and a larger axial distance from the hole entrance implies a bigger displacement, strain, and stress occurring in coal and rock, which tends to decrease gradually be- yond a certain distance. Field experimental results verify the accuracy of theoretical analysis and numeri- cal simulation.

关 键 词：突出煤层 水力掏槽 应力 应变 

分 类 号：TD713[矿业工程—矿井通风与安全]