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roof strata
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  顶板岩层
     The paper adopts the theory of strata control, analyses quality and structural form of roof strata in longwall workings, and deals with the design under particular strata condition.
     应用顶板控制理论分析判断长壁工作面顶板岩层质量及其结构形式,进行具体岩层条件下顶板控制设计。
短句来源
     Comprehensive Analysis Method of “Three Zone Classification” on Mine Roof Strata
     顶板岩层“三带”划分的综合分析法
短句来源
     Thick sandstone roof in the roof strata construction is one of the main influence factors of rock burst. The main identifying base of the tendency of rock burst is from laboratory result and the result is different from fact widely.
     顶板岩层结构中的厚层砂岩顶板是影响冲击矿压发生的主要因素之一,而目前作为煤层冲击倾向鉴定的主要依据是煤层自身的冲击倾向的实验室鉴定结果,这一结果与实际现场有的反差较大。
短句来源
     Study of roof strata movement in coal mining face under steep angle
     大倾角煤层采面顶板岩层运动研究
短句来源
     By contrasting with weighting observation data, the conclusion that roof strata have large-small structures is demonstrated.
     并通过现场矿压观测资料,从理论上论证了顶板岩层中存在的结构体实质上包括“大、小结构”两个部分。
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  “roof strata”译为未确定词的双语例句
     Combined with the geological conditions and the law of roof strataactivities, the key points of research and application of rock mechanicsshould be: 1. Research on mechanism of pressing crack and softening roof strata.
     结合大同矿务局的地质条件与顶板活动规律,岩石力学的研究与应用重点是: 1.顶板高压注水压裂软化机理的研究. 2.岩石的渗透特性及孔隙水对岩石力学性质影响的研究.
短句来源
     THE CONTROL METHOD OF IMMEDIATE ROOF STRATA DURING THE FIRST WEIGHTING STAGE
     论直接顶岩层初次来压阶段的控制方法
短句来源
     The study of the law of roof strata combination movement
     覆岩组合运动规律的研究
短句来源
     In combination with the monitoring results of the roof caving process in Chengchao Iron Mine,the roof strata caving process was analyzed,obtaining a complete roof cavity development process sketch.
     结合程潮铁矿顶板崩落过程的监测结果,分析了顶板岩体的崩落过程,得出了完整的顶板空区发展过程图。
短句来源
     The paper regards the main roof strata in uphill and downhill mining of an inclined longwall as a elastic plate.
     本文将倾斜长壁仰斜、俯斜开采的老顶岩层视为倾斜弹性板。
短句来源
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  相似匹配句对
     The study of the law of roof strata combination movement
     覆岩组合运动规律的研究
短句来源
     Strata Behaviors and Roof Monitor of Room-and-Pillar System
     房柱式开采的矿压显现规律及顶板监测
短句来源
     Fiddler on the Roof
     《屋顶上的提琴手》:种族,世代,阶级与性别冲突的史诗
短句来源
     DESIGN OF TRANSPARENT ROOF
     透光屋面设计
短句来源
     Devonian Strata in Guangxi
     广西的泥盆纪地层
短句来源
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  roof strata
Investigation into the Behaviour of a Support System and Roof Strata During Sublevel Caving of a Thick Coal Seam
      
Displacement discontinuities and stress changes between roof strata and their influence on longwall mining under aquifers
      
Ultimate collapse of cross-jointed, thinly bedded, horizontal roof strata
      
The paper outlines a new classification model of roof strata namely cavability using fuzzy set methodology and linguistic variables to assign ratings for individual roof beds.
      
The roof strata tilt approach to pack design-a Case Study
      
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A new roof-control technique has been developed, which involves the use of rock-bolting in combination with long cables to strengthen the roof strata and the smooth blasting procedure to reduce the deterioration effect to the roof wall. It is shown practically that this technique has won successes in minimizing the roof-fall, assuring long-term safety in stopes and improving ore recovery. In this paper, the roof support system, the corresponding parameters, application process, equipments...

A new roof-control technique has been developed, which involves the use of rock-bolting in combination with long cables to strengthen the roof strata and the smooth blasting procedure to reduce the deterioration effect to the roof wall. It is shown practically that this technique has won successes in minimizing the roof-fall, assuring long-term safety in stopes and improving ore recovery. In this paper, the roof support system, the corresponding parameters, application process, equipments or tools and the exaluation of roof-monitoring are all described in detail.

长锚索与短锚杆联合加固顶板岩层和用光面爆破技术减轻对顶板岩层的破坏作用是采埸顶板控制的新技术,实践表明它在防止顶板冒落、确保采埸持续安全生产、提高矿石回收率等方面是成功的,对采埸顶板支护系统及参数、施工工艺及机具、采埸顶板状态的监测的评价等文中均有详细阐述。

Based on the field measurements of No. 8027 longwall face of Wangcun Coal Mine, this paper attempts to give a description of the planar FEM study of the basic strata behaviors of the hard roof after injecting pressured water prior to mining for induced caving. The study reveals that after the pre-injection of the pressured water the load on the powered face supports and the peak in-situ stress of the rock mass have been reduced remarkably and the face support performance has been improved effectively. These...

Based on the field measurements of No. 8027 longwall face of Wangcun Coal Mine, this paper attempts to give a description of the planar FEM study of the basic strata behaviors of the hard roof after injecting pressured water prior to mining for induced caving. The study reveals that after the pre-injection of the pressured water the load on the powered face supports and the peak in-situ stress of the rock mass have been reduced remarkably and the face support performance has been improved effectively. These indicate that the method of induced caving of hard roof by pressured water pre-injection is effective to tackle the problem of the hard roof strata control.The study also shows that the height of the fractured zone is closely related to the caving height of the roof in the goaf, while the rational height of the pre-injection of pressured water must be approximately the same as that of the caving height of the roof to be caved in the goaf. The strength of the elastic energy accumulated in the coal seam is reduced after the pre-injection of the pressured water, therefore the method can also be used as an effective measure for the prevention of the rockbursts.

本文以王村矿8207工作面坚硬顶板预注压力水试验的实测资料为基础,通过平面有限元分析,探讨了顶板注水后工作面矿压显现的特点。研究表明,顶板注水后,支架载荷、岩体应力峰值都有明显降低,对改善工作面支护状况有显著的效果,是控制坚硬顶板的有效技术途径;顶板破坏区的高度与老塘冒落高度有密切的关系,合理的注水高度应与老塘已有的冒高接近;顶板注水后使煤层弹性能量积聚程度减弱,可作为防治冲击地压的有效措施之一。

In Taozhuang coal Mine, Shandnng the No. 2 coal seam mined with the hydraulic mining method is 800—1000m deep. Its roof strata is thick sandstone with high strength (its one dimensional compressive strength is 1300 kg/cm~2) and possessed of the property of accumulating ??the energy. The vertical stress of strata is above 600 kg/cm~2. Since the former hydraulic extracting procedures were not rational, coal bumps occurred frequently and the safety of the coal production was menaced seriously. In order...

In Taozhuang coal Mine, Shandnng the No. 2 coal seam mined with the hydraulic mining method is 800—1000m deep. Its roof strata is thick sandstone with high strength (its one dimensional compressive strength is 1300 kg/cm~2) and possessed of the property of accumulating ??the energy. The vertical stress of strata is above 600 kg/cm~2. Since the former hydraulic extracting procedures were not rational, coal bumps occurred frequently and the safety of the coal production was menaced seriously. In order to solve the problem, the authors have been invited to carry out the research work to reform the hydraulic extracting procedures since 1980. During these years, the authors closely co-operated with the Research Institute of Zaozhuang Mine Administration and Taozhuang Mine. They went through detailed study and practice in situ, meantime, they thoroughly studied the causes of coal bumps and the key problem of prevention of coal bumps by adopting the methods of similar material simulation and finite element computer simulation. The authors also studied and compared the results of the single back-water gate (single sublevel)centered production and the multi-back-water gate(multi-sublevel) combined production, etc. various hydraulicking proceduces. Finally, a rational hydraulic extracting procedure which can greatly reduce the disaster of coal bumps was found. This paper not only presents the results of the research work, but also describes the methods of predicting and forecasting the coal bumps in hydraulic extracting panel including inferring the location of the peak of the abutment pressures and the rock behavior of the main roof by using the maximum curvature point of the roadway's convergence curve and the regularity of a sudden change in abutment pressure oceurences before and after the cracking of the main roof. A basis for realizing successfully the reform of hydraulic extracting procedures has been established

山东省陶庄煤矿水采二号煤层采深为800~1000m;顶板为坚硬砂岩,单压强度为1300kg/cm~2,能够积聚能量。煤层上垂直压力可达600kg/cm~2。以上由于原开采程序不合理,冲击地压频繁发生,严重威胁安全生产。为了解决这个问题,作者自1980年起应邀进行了改革水采程序的研究,通过与枣庄矿务局科研所和陶庄煤矿的密切合作,在现场进行了详细的研究和实践。同时,通过相似材料模拟和电子计算机有限元模拟研究了冲击地压发生的原因和防治的关键。通过研究和比较单—水道开采和多水道联合开采等多种开采程序后,找到了能大幅度降低冲击地压危险的开采程序。本文不仅介绍了研究结果,还描述了冲击地压的预测方法,包括利用顶底板移近量曲线的曲率最大点测定支承压力的高峰位置和利用顶板断裂前后压力显现的变化规律预测老顶来压。从而,为实现改革开采程序奠定了基础。

 
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