【摘要】 介绍了在近距离采空区下的巷道采用桁架支护技术,增大了抗压强度,减少了巷道变形量,提高了支护效果,确保安全生产。更多还原

【Abstract】 In the headings beneath close range goafs,truss support is used that increases compression strength,decreases deformation of heading,improves the performance of support and ensures safety of production.更多还原