工作面推进速度对顶板覆岩活动的影响  

Influence of Advancing Speed on Roof Overburden Activity

作　　者：梁东民 池小楼 LIANG Dongmin;CHI Xiaolou(Shanxi Lanxian Changheng Coal Industry Company,Lyuliang 033000,China;Key Laboratory of Mining Response and Disaster Prevention and Control in Anhui Province,A nhui University of Technology,Ht~ainan 232001,China)

机构地区：[1]山西岚县昌恒煤焦有限公司,山西吕梁033000 [2]安徽理工大学深部煤矿采动响应与灾害防控安徽省重点实验室,安徽淮南232001

出　　处：《煤矿安全》2018年第9期276-279,共4页Safety in Coal Mines

摘　　要：为研究工作面不同推进速度对顶板覆岩的影响,建立了顶板破坏的梁模型,并通过岩石力学试验,分析了不同加载速率下的力学特性。研究表明,工作面推进过程可视为对岩体的加载,并通过影响岩体加载速率,进而影响顶板覆岩的活动。低速推进时,顶板应力峰值、位移量较大,不利于顶板的管理;推进速度较高时,材料破坏会由塑性向脆性转变,易发生切顶、岩爆等地质灾害。在回采过程中,选择合理的推进速度,能够最大程度的保障安全生产,实现良好的经济效益。In order to study the effect of different advancing speed on the roof overburden, the beam model of roof failure was established, and the mechanical properties under different loading rates were analyzed by rock mechanics test. The research shows that the advancing process of working face can be regarded as the loading of the rock mass, and influences the activity of roof overlying rock to further affect the load rate of the rock mass. At low speed, the stress peak and displacement of roof are large,which is not conducive to the management of roof; when the propulsion speed is high, the material failure will change from plasticity to brittleness. In the process of mining, choosing a reasonable advancing speed can maximize the safety of production and achieve good economic benefits.

关 键 词：顶板岩层 加载速率 推进速度 岩石力学 地质灾害 

分 类 号：TD327.2[矿业工程—矿井建设]