深部急倾斜软底煤巷失稳数值模拟及支护研究  

Numerical simulation and support research on the instability of deep-steeply inclined coal roadway with soft floor

作　　者：王宗林[1,2] 谭震[1] 梁冰[3] 孙维吉[3] 石占山[1] 

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]辽宁省阜新市国土资源局,辽宁阜新123000 [3]辽宁工程技术大学力学与工程学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2017年第10期1009-1014,共6页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金(51374124);国家青年自然科学基金(51304111)

摘　　要：针对大安山矿巷道底鼓严重,左帮比右帮变形显著,遇水后变形加剧的问题,采用数值模拟和现场试验的方法,研究急倾斜煤巷在顶板坚硬底板较软条件下的失稳机理并提出支护方案.研究结果表明:顶底板岩性差别较大而表现不同的变形特征和底板泥质砂岩遇水泥化是导致巷道失稳的主要原因;最大主应力集中于巷道顶、底部和两帮,且分别为水平应力的1.54倍和竖直应力的1.25~1.67倍;提出锚网索+"W"钢带并对围岩喷浆的非对称支护方案,塑型区显著缩小且减小了拉伸屈服的范围,底鼓量缩小至19.8 cm,锚杆之间形成锚固圈,支护效果较好.According to the serious floor heave, the deformation of left side is more significant than that of right side, and the increasing of deformation characteristics in water in a certain mine, the deformation mechanism and support scheme were simulated by using the method of numerical simulation and field for steeply inclined coal roadway under the condition of soft floor and hard roof. The results show that both the significant difference of floor and roof lithology showing different deformation characteristics and the mud sandstone of floor weakened by water are the main reason. The maximum principal stress is concentrated on the top, bottom and two sides of the roadway, and it is 1.54 times of the horizontal stress and 1.67-1.64 times of the vertical stress. Bolt-net-anchor and steel band of model W coupling with shotcreting support scheme is proposed, plastic zone and the tensile yield are significantly reduced, the floor heaves volume reduced to 19.8 cm, the anchor ring is formed between the anchor bolts, and better supporting effect is obtained.

关 键 词：急倾斜 煤层巷道 硬顶软底 变形失稳 非对称支护 

分 类 号：TD353[矿业工程—矿井建设]