【摘 要】
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Yunjialing mine is operating in typical "soft" strata conditions.As the mine goes deeper, the gate-road support has been getting more and more difficult.The major problems include: (1) Roof deflection
【机 构】
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Yunjialing Mine, Handan Mining Group Ground Contr
【出 处】
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33届国际采矿岩层控制会议(中国)
论文部分内容阅读
Yunjialing mine is operating in typical "soft" strata conditions.As the mine goes deeper, the gate-road support has been getting more and more difficult.The major problems include: (1) Roof deflection, the roof deflects more than 500mm within a month period.(2) Rib to rib convergence, the rib to rib converges more than 1000mm within a month period.(3) Floor heave, the floor heave is as much as 1000mm within a month.(4) Cable Broken, 80% of cable bolts are broken as the gate-road deforms.The gate-road has to be re-cut and maintained several times during the life time of the gate-road.To solve the ground control problems, Jennmar China and mine management has conducted a project "Gate-road Support Deign under Soft Rock and Deep Cover".In this paper, the history of entry support in Yunjialing Mine is reviewed.The support system is modified based on a new design methodology "Yieldable Design System".The results have shown that the gate-road support has been greatly improved after the modification of design and practice of new products.
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