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- Influence factors and change law of protection coal pillars left 影响保护煤柱尺寸留设的因素及其变化规律
- Research on Engineering Geologic Characteristics of Weathered Basement Rock Zone and Mechanism of Reducing Protective Coal Pillar 基岩风化带的工程地质特征与缩小防护煤柱机理的研究
- protective coal pillars 保护煤柱
- protective coal pillar 保护煤柱
- protection coal pillar 保护煤柱
- Mining on conditions that ponding at the same layer of Yongquan mine area,the method and relative technical parameters of leaving the safety protective coal rock pillar are introduced. 介绍了阳泉矿区在有同层积水威胁情况下开采,留设安全保护煤岩柱的方法和有关技术参数。
- Dividing partition coal pillars and region coal pillars, and selecting parameter are key to prevent disaster. 区分隔离煤柱和区内煤柱,选择合理开采参数,是防止灾变的关键。
- On the basis of these, the coal pillars can be kept stable by adjusting and controlling the destabilization conditions. 根据这些特性，可通过调控煤柱失稳条件使之不失稳，达到控制煤柱稳定的目的。
- The mechanical model of key strata supported by coal pillar is set up according to the layout of coal pillars in the coalface of short wall mining. 根据短壁开采条件下保护煤柱的布设特点,建立由保护煤柱支承的关键层力学分析模型。
- Secondly, simulation elicits wall rock transmogrification under the different coal pillar and different stress. 其次模拟研究分析了留设煤柱宽度不同时以及地应力大小不一时沿空巷道围岩变形情况，得到了一些认识；
- Medium and small coal mines in north of Shaanxi Province generally adopt longwall remaining coal pillars support mining. 摘要长壁留煤柱支撑法开采是陕北中小煤矿普遍采用的一种采煤方法。
- The coal pillar has mode-soft behaviour, so it is possible to estimate the destabilization. 煤柱失稳还具有模态软化特性，可以对失稳的可能性进行佑计。
- The roof rock was assumed in the elastic state,established the mechanical model of coal pillar and roof system. 假设顶板岩层处于弹性工作状态情况下,建立了煤柱-顶板系统的力学模型。
- The principle of using the anchor cable support to replace unexploited coal pillars,constructing artificial stone walls and wooden sheds in the channel along goaf is introduced. 介绍了用锚索支护代替留设煤柱、人工石墙木棚等留巷技术的原理;
- Rock covering destroying parameter is the scientific basis of reasonable preserving waterproof coal pillars and guarantees safety production and retrieves coal resources. 覆岩破坏参数是矿井合理留设防水煤柱,保障矿井安全生产和提高煤炭资源回收率的科学依据。
- The results indicate that the width of coal pillar has a great influence on the stress distribution of the gob-side entry. 研究表明：留设煤柱的宽度对孤岛面沿空巷道的应力分布有较大影响；
- The paper also gives an introduction into the impermeability of water sealing layers such as clay layers and the ways to leave water prevention coal pillars or ... 采用这些研究成果,淮南和潘谢矿区分别提高了开采上限,增加了可利用储量。
- In the plastic limit analysis,the wrinkler's plate is smartly analyzed in yield-line theory to get the critical compression strength of the coal pillar. 在分析过程中,利用机动法对温克尔地基板(弹簧支撑板)进行了塑性极限分析,得出了煤柱抗压强度的临界值。
- The results show that the coal pillar destabilization has catastrophe and gradualness paths, which correspondingly cause the violent destroy and the gradualness "weak" destroy. 结果表明：煤柱失稳具有突变、缓慢2条路径，相应地形成了煤柱失稳的突然猛烈破坏和较缓慢的“瘫软”破坏；
- When the destabilization of the coal pillar occurred, it needs much more strength of coal pillar to restore to the steady state than that when destroying. 煤柱一旦失稳，如要使其恢复到稳定状态，需要的煤柱强度要比煤柱破坏时的强度大的多；
