Research and Practice of Legless Shed Support in Liuzhuang Coal Mine
In coal mine,the mining pressure is obvious in the special areas such as top coal supporting,over fault,composite roof,etc.If the support is not in place at one time,it is easy to have slurry cracking,top wall compression deformation,bolt and cable breakage,etc.,and some mines have already suffered from cable breakage and injury accidents.The support scheme in special sections should follow the concept of"support once in place"to avoid the roof breakage,cracking,deformation and instability caused by weak initial support strength,which will bring great security risks to the later use and secondary repair of the roadway.Liuzhuang coal mine explores the combined support concept of"legless shed+jet grouting"for special sections such as passing fault and supporting top coal,which not only takes into account the roadway driving speed,but also practices the concept of"support once in place",and has achieved good results.
special areasupport once in placelegless shed+jet grouting
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