Numerical Simulation of Preventing Rock Burst with Hydraulic Cutting

被引：6
|
作者：
Cheng, Yao [1 ]
Ma, Yulin [2 ]
Zhang, Yongli [2 ]
机构：
[1] Liaoning Tech Univ, Coll Innovat & Practice, Fuxin 123000, Peoples R China
[2] Liaoning Tech Univ, Coll Mech & Engn, Fuxin 123000, Peoples R China
来源：
NATURAL RESOURCES AND SUSTAINABLE DEVELOPMENT II, PTS 1-4 | 2012年 / 524-527卷
关键词：
rock burst; hydraulic cutting; stress; numerical simulation;
D O I：
10.4028/www.scientific.net/AMR.524-527.637
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Rock burst become increasingly serious in deep mining. Pressure relief will be realized with hydraulic cutting in the coal seam, and rock burst could be substantial prevented. The finite element model of hydraulic cutting is established, the variation of stresses around the slot before and after hydraulic cutting are found by Ansys software. The results of numerical simulation show: The influence circle of differential pressure with hydraulic cutting is about 5 meters. In the circle the stresses fall down 81%. The pressure relief is best when the pitch of holes is 8 meters with multi-slot cutting. The surface high stress area is significantly reduced after slotting and the stress concentration zone transferred to the deep. Reasonably direction of cutting travel determined pressure relief, and the cutting distance could influence directly the dimension and scope of pressure relief. The simulation results provide a theoretical foundation and technical reference for preventing rock burst with hydraulic cutting.
引用
收藏
页码：637 / +
页数：2
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