摘要
为了控制特厚煤层沿空掘巷围岩变形,保证巷道服务期间安全稳定,结合马道头煤矿8211工作面5211回风巷地质条件,分析了留小煤柱沿空掘巷围岩变形特点,并提出相应的沿空巷道顶板及煤柱控制方案。试验表明,采用"锚索-槽钢组合支护+帮部高强锚索支护"的联合支护技术后,沿空掘巷围岩变形得到有效控制,保证了巷道围岩稳定。
In order to control the deformation of surrounding rock of gob-side roadway in extra-thick coal seam and ensure the safety and stability of roadway during service period,combined with the geological conditions of the 5211 return-air roadway in the 8211working face of Madaotou Coal Mine,the deformation characteristics of surrounding rock of gob-side roadway with small coal pillars are analyzed,and the corresponding control schemes of roof and coal pillars of gob-side roadway are put forward.The underground test shows that the combined support technology of“anchor cable-channel steel combined support+high-strength anchor cable support”can effectively control the surrounding rock deformation of gobside driving roadway and ensure the stability of the surrounding rock of roadway.
作者
赵恩祺
Zhao En-qi(General Control Room of Datong Coal Mine Group Co.,Ltd.,Shanxi Datong 037003)
出处
《山东煤炭科技》
2019年第12期48-50,共3页
Shandong Coal Science and Technology
关键词
特厚
沿空
支护
对策
extra-thick
along goaf
support
measures
