薄煤层工作面切顶卸压留巷技术研究  

Technology of Roof-cutting Pressure-relief Roadway Retaining of Thin Coal Seam Working Face

作　　者：韩锋勇 HAN Fengyong(Shanxi Hongya Coal Industry Co.,Ltd.,Hongtong 041600,Shanxi,China)

机构地区：[1]山西洪崖煤业有限公司,山西洪洞041600

出　　处：《能源与节能》2024年第2期118-120,126,共4页Energy and Energy Conservation

摘　　要：为提高矿井煤炭资源回收率并提高煤炭开采效率,结合3503综采工作面开采煤层厚度薄的特点,针对性提出切顶卸压留巷技术方案,并进行工程应用。在回风巷切顶卸压留巷期间,通过锚索超前补强可提高留巷段顶板强度,为留巷工作开展创造良好条件;使用DCA-45型切缝机提高切顶钻孔施工质量,通过聚能爆破方式提高切缝效果;在滞后支护段采用密集单体进行补强,可减少采动压力、采空区顶板垮落等对留巷段围岩变形影响。现场应用后,留巷段顶板在滞后采面30 m范围内下沉量增加速度较快,随着与采面距离增加留巷段下沉量逐渐趋稳,最终下沉量控制在165 mm以内。In order to improve the recovery rate of coal resources and improve the efficiency of coal mining,combined with the thin thickness of coal seam mining in 3503 fully-mechanized mining face,the technical scheme of roof-cutting pressure-relief roadway retaining was put forward and carried out in engineering application.The roof strength of the roadway retention section can be improved by the anchor cable advance reinforcement during the period of the roadway retaining by cutting the roof and releasing pressure,which created good conditions for the roadway retaining work;DCA-45type seam cutter was used to improve the construction quality of roof cutting drilling,and the seam cutting effect was improved by shaped charge blasting;the use of dense monomer reinforcement in the lagging support section can reduce the influence of mining pressure and goaf roof caving on the deformation of surrounding rock in the roadway retaining section.After the field application,the subsidence of the roof of the roadway retaining section increased rapidly within 30 m of the lagging mining face,the subsidence of the roadway retaining section gradually becomes stable with the increase of the distance from the mining face,and the final subsidence was controlled within 165 mm.

关 键 词：薄煤层 切顶卸压 沿空留巷 挡矸支护 

分 类 号：TD353[矿业工程—矿井建设]