摘要
煤层上覆岩层中的坚硬厚层砂岩顶板是引起冲击地压发生的主要因素之一。以砚北煤矿250205工作面开采为例说明采用顶板注水软化、钻孔卸压、顶板预裂爆破和强制放顶等手段可使坚硬顶板集聚的弹性能释放或转移,降低煤岩体应力集中程度和冲击倾向性,治理效果良好,从而消除诱发冲击地压的根源。
The hard and thick sandstone roof in the overlying strata of coal seam is one of the main factors causing rock burst. Taking the 250205 working face of Yanbei Coal Mine as an example, this paper illustrates that the use of roof water injection softening, borehole pressure relief, roof pre-splitting blasting and forced caving can release or transfer the elastic energy of hard roof aggregation, reduce the stress concentration degree and impact tendency of coal and rock mass, and have good control effect, thus eliminating the root of rock burst.
作者
李星亮
Li Xing-liang(Shaanxi Railway Engineering Vocational Technical Institute, Shaanxi Weinan 71400)
出处
《山东煤炭科技》
2018年第9期172-174,共3页
Shandong Coal Science and Technology
关键词
冲击地压
坚硬顶板
关键层
注水软化
钻孔卸压
rock burst
hard roof
key stratum
water-infusion softening
drillhole pressure relief
