(1. Safety Engineering College，North China Institute of Science and Technology，Beijing 101601，China； 2. School of Resource and Safety Engineering，China University of Mining and Technology，Beijing 100083，China)
Abstract：The support for the fully-mechanized coal roadway nearby narrow pillar in the mining face 20103 of the Wangjialing coal mine suffered large asymmetric deformation. In order to solve this problem，a technique was proposed. In the first step，the fracture position of the basic roof and two-way movement behavior was investigated using the method of borehole observation，then combing the CT scan technology for the asymmetric evolution process of coal roof microcracks，an asymmetric support technology using both parallel-arranged composed of channel steel truss cable and single cable was designed. Its composition structure and controlling mechanism were then researched in detail. The following results were obtained：(1) Away from the tunneling face 20103 100–300 m，fracture took place at the top of the narrow pillar，apart from the central plane of the roadway 2.918 m；(2) Roof delamination and horizontal dislocation have occurred twice in coal roof caused by the rotation and descending of basic roof: the first delamination led to a regional scale faults in the roof near the pillar side and parallel to the entry direction；the second delamination led to some site scale roof falls near the pillar side；(3) Microcracks development on either side of the entry roof were asymmetric: the amount，developing speed and faults formation interval were discrepant between the horizontal dislocation zone and the stable zone；(4) The feature of the asymmetric support method using parallel-arranged composed of channel steel truss cable and single cable include: weak sites extra-strengthened，tuned by weaker support at relative strong sites，line shape supports accompanied by point supports，and the load on every supports were balanced. This method has been successfully implemented in the working face 20103，deformation on the roof at pillar side and coal rib side were adjusted to synchronous，the host rock was very effectively controlled. The result and experience are very useful to similar engineering conditions theoretically and practically.
殷帅峰1，程根银1，何富连2，谢福星2，单 耀1. 基于基本顶断裂位置的综放窄煤柱煤巷非对称支护技术研究[J]. 岩石力学与工程学报, 2016, 35(S1): 3162-3174.
YIN Shuaifeng1，CHENG Genyin1，HE Fulian2，XIE Fuxing2，SHAN Yao1. An asymmetric support technique for fully-mechanized coal roadway nearby narrow pillar based on the fracture position analysis in basic roof. , 2016, 35(S1): 3162-3174.
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2016, Vol. 35 
