| 1. | Numerical analysis of creep pressing stress of casing in deep salt rock stratum
深井石油套管盐膏岩层蠕变挤压应力计算研究 |
| 2. | Research on rationally arranging position of horizontal boreholes in roof rock stratum
顶板岩层水平长钻孔合理布孔层位的研究 |
| 3. | Numerical simulation of failure process of overburden rock strata caused by mining excavation
采动影响下覆岩垮落过程的数值模拟 |
| 4. | Collapse characteristics research on roof rock strata with 3dec in full - mechanized caving mining
焦作矿区煤层瓦斯合理预抽期的研究 |
| 5. | Combined support of crossing point of roadway bottom slice and loose rock stratum with rockbolt net and bamboo curtain
底分层及松散岩层巷道交叉点锚网竹笆联合支护的研究 |
| 6. | The interior failure mechanism of rock strata developing from large - scale excavation and the rules of land surface deformation are analyzed on the base of careful investigation
在详细调查的基础上简要分析了地下大面积采空后岩土内部破坏机制和地面变形规律。 |
| 7. | Through some examples , we think that the ultrasonic imaging method that can obtain some parameters of the crack attitude and the opening is an effective method in studying the crack of underground rock stratum
经过多项工程实践，我们认为超声成像法对钻孔孔壁扫描获得裂隙产状、开度等参数是研究地下岩层裂隙的有效方法。 |
| 8. | Key strata is a rock seam which plays an important controlling roles in the movement of mining overlayer strata while the key strata is sometimes made up of two or more compound rock strata
摘要在采场覆岩运动中起主要控制作用的岩层为关键层，而有时关键层是由2层或2层以上岩层形成的复合岩层所组成，我们称其为复合关键层。 |
| 9. | This paper introduces four kinds of mehtods that is used to investigate crack in underground rock stratum : borehole core method , ultrasonic imaging method , borehole television method , and borehole discharge well logging method
摘要本文介绍了地下岩层裂隙的4种勘察研究方法：钻孔岩芯法、超声成像法、钻孔电视法、钻孔流量测井法。 |
| 10. | The example analysis indicates that the compound key strata objectively exists in the motion of rock strata , and it plays a much more important controlling role than that of single rock , which is separated from same rock groups
实例分析表明，复合关键层在岩层运动中是客观存在的，比同组岩层分开后的单一岩层的控制作用的线性叠加要大得多。 |
