工作面推进速度对顶板覆岩活动的影响
Influence of Advancing Speed on Roof Overburden Activity
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摘要: 为研究工作面不同推进速度对顶板覆岩的影响,建立了顶板破坏的梁模型,并通过岩石力学试验,分析了不同加载速率下的力学特性。研究表明,工作面推进过程可视为对岩体的加载,并通过影响岩体加载速率,进而影响顶板覆岩的活动。低速推进时,顶板应力峰值、位移量较大,不利于顶板的管理;推进速度较高时,材料破坏会由塑性向脆性转变,易发生切顶、岩爆等地质灾害。在回采过程中,选择合理的推进速度,能够最大程度的保障安全生产,实现良好的经济效益。Abstract: In order to study the effect of different advancing speed on the roof overburden, the beam model of roof failure was established, and the mechanical properties under different loading rates were analyzed by rock mechanics test. The research shows that the advancing process of working face can be regarded as the loading of the rock mass, and influences the activity of roof overlying rock to further affect the load rate of the rock mass. At low speed, the stress peak and displacement of roof are large, which is not conducive to the management of roof; when the propulsion speed is high, the material failure will change from plasticity to brittleness. In the process of mining, choosing a reasonable advancing speed can maximize the safety of production and achieve good economic benefits.
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Keywords:
- roof strata /
- loading rate /
- advancing speed /
- rock mechanics /
- geological disaster
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[1] 王磊,谢光祥.综采面推进速度对煤岩动力灾害的影响研究[J].中国矿业大学学报,2010,39(1):70-74. [2] 杨胜利,王兆会,蒋威,等.高强度开采工作面煤岩灾变的推进速度效应分析[J].煤炭学报,2016,41(3):586-594. [3] 王金安,焦申华,谢广祥.综放工作面开采速率对围岩应力环境影响的研究[J].岩石力学与工程学报,2006,25(5):1-7. [4] 谢光祥,常聚才,华心祝.开采速度对综放面围岩力学特征影响研究[J].岩土工程学报,2007,29(7):964. [5] 刘全明.浅埋综采工作面矿压显现的推进速度效应分析[J].煤炭科学技术,2010,38(7):24-26. [6] 王晓振,许家林,朱卫兵,等.浅埋综采面高速推进对周期来压特征的影响[J].中国矿业大学学报,2012, 41(3):349-354. [7] 王杜,张宏.加载速度对两类不同材料力学性能影响程度的分析[J].西安公路交通大学学报,1997,17(1):121-123. [8] 尹小涛,葛修润,李春光.加载速率对岩石材料力学行为的影响[J].岩石力学与工程学报,2010,29(S1):2610-2615.
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