大倾角煤层大采高综采围岩运移与支架相互作用规律  

Interaction characteristics between strata movement and support system around large mining height fully-mechanized face in steeply inclined seam

作　　者：解盘石[1] 伍永平[1] 王红伟[1] 任世广[1] 

机构地区：[1]西安科技大学能源学院,西部矿井开采及灾害防治教育部重点实验室,陕西西安710054

出　　处：《采矿与安全工程学报》2015年第1期14-19,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51074120);国家自然科学青年基金项目(51204132)

摘　　要：为了研究大倾角厚煤层大采高综采围岩运移规律,采用现场实测、数值模拟和相似材料模拟实验相结合的方法,分析了大倾角大采高采场围岩运移、顶板结构和"支架-围岩"相互作用特征。结果表明:其采场围岩运移规律与一般采高大倾角煤层相似,具有明显非对称性;但大采高采场围岩的运移特征更为活跃,初次来压和周期性来压步距均明显减小,来压强度增大,并伴有煤壁片帮现象。采空区垮落顶板的滚滑、充填空间增大,破断基本顶易形成反倾向堆砌结构,工作面下部充填压实程度增加,导致工作面顶板受力非均衡性更明显,采场覆岩易形成多级梯阶岩体结构。顶板与支架的接触及施载特征更为复杂,支架载荷变化幅度增大,架间相互作用明显,工作面装备防倒、防滑难度加大。To research the overlying strata movement around large mining height fully-mechanized face in steeply inclined thick seam, the field measurement, numerical simulation and similar material simulation methods were used to analyze the strata movement, roof structure and rock-support interaction characteristics in this paper. The results indicate that strata movement of large mining height face is similar to general mining height face in steeply inclined seam, which has asymmetry characteristic along the inclined direction of coal face, but the deformation, failure and movement of surrounding rock is more active, roof weighting step decreases obviously and weighting strength increases, while accompanying with rib fall of coal wall. In addition, the space size of slipping, rolling and filling of caving roof increases, and the anti-dip pile structure is easily formed after the fracturing of main roof, while the filling and compacting degree of failure roof increases at the lower part of coal face, which inducing more significant unbalance mechanics features between the upper and lower part of coal face, and the multilevel ladder strata structure is easily formed in overlying strata above the face. Moreover, the characteristics of contacting and loading of roof-support system is more complex, the change range of support load and interaction between supports increase obviously, while the anti-toppling and anti-skid of coal face equipment is more difficult.

关 键 词：大倾角煤层 大采高开采 运移规律 梯阶岩体结构 “支架-围岩”系统稳定性 

分 类 号：TD325[矿业工程—矿井建设]