您要查找的是不是:
- remining under coal pillar 刀柱下复采
- Mining Method under Coal Pillar in Close Distance Coal Seam 近距离煤层煤柱下的开采方法
- Mechanism and control of strata behaviors of gateway under coal pillar 煤柱下巷道的矿压显现机理与控制
- Ground behavior law of mine roadway under coal mining with coal pillars 带煤柱开采条件下巷道矿压显现规律
- 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;
- 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 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;
- 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 research on probing into water bearing structure and watery of fore and lateral survey under coal mine is made by TEM. 利用瞬变电磁法在煤矿井下巷道开展了超前和侧向探测含水构造及富水性的试验研究。
- 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;
- The layers under coal seams in the study area generally containing fluvial sediments suggested that the coal developed in fluvial system. 不同层位的煤层,其下面普遍有河流相沉积,说明煤层是在古河流基础上发展起来的;
- 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;
- Metal material erosion mechanism and main damage form under coal mine shaft caused by erosion are introduced and propeses the measures for prevention. 介绍了金属材料腐蚀的机理和煤矿井下金属材料腐蚀破坏的主要形式,并提出了预防措施。
- The formula of necessary and sufficient condition for instability and failure of strip coal pillar along strike is obtained according to the cusp catastrophi... 并根据模型对走向条带煤柱破坏失稳的机理进行了分析。为条带开采煤柱的稳定性及破坏失稳研究提供了新的理论方法。
- The lower clastic member under coal C_3 is interperted as deposits of anastomosed river system on the upper delta plain. 研究表明:C_3煤层形成对的下伏碎屑岩段为一发育在上三角洲平原上的网状河流体系。
- Also a comparison of the plastic status of the coal pillar is made respectively considering uncoupled and coupled situations, and the deformation and failure laws are researched. 结果表明:两种情况下的塑性区均呈现“马鞍”形状,这与以往的大量实测结果相一致。
- The stability of coal pillar of the short-wall mining was analyzed systemically by numerical simulation with the rock failure process analysis software (RFPA2D). 采用岩石破裂过程分析软件RFPA2D系统,对短壁机械化开采的煤柱稳定性进行数值计算与分析。
- She and I can't live under the same roof. 她和我不能住在一起。
- The enemy army crumpled up under our attacks. 敌军在我军的攻击下垮了。