摘要
单体液压支柱因其初撑力高,恒阻,承载力均匀,支撤速度快、安全、高效等优点在回采工作面广泛采用,单体液压支柱能够有效及时地控制顶板,但在直接顶初次垮落期间,由于没有认真分析直接顶自身运动规律,常发生单体面推垮事故,这就是说采场围岩破坏的基本规律不因支柱支撑能力大小而改变,因此对单体受力进行力学分析,找出单体柱受力状态,提出特种支柱的支设条件、支护密度、计算方法,从而保证单体的支护强度和支架稳定性,实践证明,采用上述理论数据,不但避免了单体面推垮事故的发生,而且降低了不必要的单体投入,提高了单体柱的使用率,降低了维修费用,提高了经济效益。
individual hydraulic strut is universally used in mine working face in that its initial supporting force is high; its resistance is constant, its carrying capacity is well proportioned; its upholding and withdrawing speed is high, safe and effective. The individual hydraulic strut can control the top board effectively and timely; but for the direct boards movement law is not carefully analyzed, during its first falling down period there are often push-down accidents on the individual face. That is the essential wreckage law for the wall rock in the stope doesn抰 change with the struts carrying capacity. So we should analyze the individual struts force catching situation from mechanical perspectives, find out its force catching condition, come up with the supporting terms, timbering density, computing method for the special strut, so that the individuals timbering intensity and the brackets stability are ensured. It proves that not only pushdown accidents on the individual face are prevented, but unnecessary investment in individual strut is reduced, utility rate of the individual strut is improved, maintenance cost is abated and economic benefit is higher using the above theoretic data.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2002年第6期699-701,共3页
Journal of Liaoning Technical University (Natural Science)
