摘要
为了改变古汉山矿高应力三软煤层回采巷道前掘后修,前修后坏的现状,通过对古汉山矿地应力研究、巷道顶底板围岩强度研究、不同岩体和二1煤体的电镜表面结构特征研究以及现场实施及实测,设计出了工钢组合支护棚,针对底板岩层软、矿压大的巷道,底板采用底梁支护,并且在底梁的两端焊结,形成再生底板,采用半封闭式支护控制围岩持续变形。实践证明:采用工钢组合棚支护技术,不仅有效控制了巷道两帮变形,也限制了底鼓,并经受住了动压的作用,支护效果好,经济效益和社会效益显著。
In order to change the phenomenon of the front excavation and followed repair, and front repair and late failure in the high stress soft rock mining gateway of Guhanshan Mine, with an earth stress research in the Guhanshan Mine, a study on the surrounding rock strength of the roof and floor in the gateway and a study on the electron microscope surface structure feature of the different rocks and B1 seam coal, as well as the site practices and measurements, the H-steel combined support shield was designed. According to the soft floor rock and high strata pressure, a bottom beam support was applied to the floor of the gateway. At the two end of the bottom beam, lock barrels were welded. Thus the regenerated floor could be formed. A semi closed support was applied to control the sustained deformation of the surrounding rock. The practices showed that the application of the H-steel combined support technology could not only effectively control the two side wall deformation of the gateway, but also could restrict the floor heave, the H-steel combined support technology had with- stood the dynamic function with a good support results and obvious economic and social benefits.
出处
《煤炭科学技术》
CAS
北大核心
2009年第9期21-23,共3页
Coal Science and Technology
关键词
高地应力
工钢组合棚
回采巷道
high stress
H-steel combined shield
mining gateway
