急倾斜煤层综放面冲击地压防治工程研究  

Research on Prevention and Control Engineering of Rock Burst in Steeply Inclined Coal Seam Fully Mechanized Caving Face

作　　者：廉强 Lian Qiang(Wudong Coal Mine Co.,Ltd.,Shanxi Coal Transportation and Sales Group,Datong 037100,China)

机构地区：[1]山西煤炭运销集团乌东煤矿有限公司,山西大同037100

出　　处：《山东煤炭科技》2025年第1期116-120,共5页Shandong Coal Science and Technology

摘　　要：针对急倾斜煤层综放面回采时易发生工作面冲击地压的难题,以乌东煤矿北采煤层为研究对象,采用现场试验、理论分析、数值模拟等手段,研究不同采场覆岩体结构及运移规律,揭示冲击地压致灾机理。特殊的地质赋存条件及煤岩较强的冲击倾向性、水平分段综放面静载地应力与开采扰动应力叠加作用和“悬臂梁”结构动力失稳诱发采空区覆岩大面积滑移是引起急倾斜煤层冲击地压的主要原因。提出采用以注水弱化为主、顶板卸压为辅等综合措施,对急倾斜煤层综放工作面的冲击地压进行控制。注水弱化后,顶板破裂效果十分显著,随着钻孔爆破视电阻率增加10~15 Ω,进一步扩大了顶板破断范围,降低了顶板应力集中程度,取得了较好的预防效果。In view of the difficult problem that working face rock burst is easy to occur during the stoping of steeply inclined coal seam fully mechanized caving face,taking the north coal mining seam of Wudong Coal Mine as the research object,means of field experiments,theoretical analysis,numerical simulation and others are used to study the overlying rock mass structure and migration law in different stopes,revealing the disaster-causing mechanism of rock burst.The special geological occurrence conditions and relatively strong impact tendency of coal and rock,the superposition action of static crustal stress and mining disturbance stress of horizontal segmented fully mechanized caving face,and the dynamic instability of"cantilever beam"structure induced large-scale sliding of overlying rock in goaf are the main reasons for causing rock burst of steeply inclined coal seam.Propose comprehensive measures such as water injection weakening as the main approach,roof pressure relief as the supplement approach and so on to control rock burst of steeply inclined coal seam fully mechanized caving face.After water injection weakening,the effect of roof rupture is very significant.As the apparent resistivity of drilling and blasting increases by 10-15Ω,the range of roof rupture is further expanded,the degree of roof stress concentration is reduced,and a relatively good preventive effect is achieved.

关 键 词：急倾斜 综放 冲击地压 

分 类 号：TD324.2[矿业工程—矿井建设]