煤层巷道底板动态破坏机理及控制技术  

Dynamic Failure Mechanism and Control Technology of Roadway Floor

作　　者：李宝富[1] 魏向志 任永康 李小军[1] 

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000 [2]义马煤业集团股份有限公司千秋煤矿,河南义马472300

出　　处：《煤炭科学技术》2013年第10期34-37,共4页Coal Science and Technology

基　　金：国家自然科学基金资助项目(41204035)

摘　　要：基于对煤层巷道底板岩层动态破坏发生机理的分析,建立巷道底板岩层屈曲破断力学模型。研究表明水平应力的大小是影响巷道底板岩层稳定性的最主要因素,并提出巷道底板水平应力的计算方法。通过理论计算得出最大水平应力作用下,巷道底板岩层能发生屈曲破坏的最大分层厚度和破坏范围。研究结果表明增强巷道底板支护强度是控制底板岩层产生动态破裂和强烈底鼓的有效措施,采用锚喷+36U钢+防冲支架支护方式,巷道变形量减小50%左右,巷道底鼓现象得到有效控制。Based on analysising coal seam floor dynamic failure mechanism, this paper established strata buckling fracture mechanics mod- el.Research showed that main influence factors on the stability of roadway floor strata were horizontal stress, and has proposed the calculat- ing method for floor horizontal stress.According to theoretical calculation obtained the maximum delayering thickness and damage range for the floor buckling under the action of the maximum horizontal stress. Research results showed that strengthened the floor support strength could effectively control floor heave and dynamic failure, shotcrete and 36U profile steel and fender support way could reduce roadway de- formation about 50% and effectively controlled floor heave.

关 键 词：底鼓 岩层屈曲破断 防冲支架 底板支护强度 

分 类 号：TD355[矿业工程—矿井建设]