围岩

But it has more complicated velocities in the working area, and it locally develops high-speed boulder bed in neocene Xiyu Formation with a velocity 3700—4050m/s, its adjacent formation velocity: 2800—2900m/s; while it also develops low velocity gyprock that has a great variation in thickness (with an increasing thickness from south to north) with a velocity about 4000 m/s, its adjacent formation velocity: about 5000 m/s. And all this is the cause of the complexity of the velocity in this working area; thus to make the No.1 structure in northern YK reliable, in velocity modeling it has much research work to do, and it is also the topic of this graduation thesis.

但在工区内速度较为复杂，工区内局部发育上第三系西域组高速砾岩层，速度约在3700—4050m/s ，围岩速度约在2800—2900m/s，同时全区还发育有厚度变化较大的低速膏岩层，膏盐层的速度大约在4000 m/s，围岩的速度大约在5000 m/s，由此造成了本工区速度的复杂性，因此要准确落实亚肯北1号构造，还要在速度建模等方面做许多的研究工作，这也是本次毕业论文所要研究的课题。

The relation between different openings radius and overbreak as well as underbreak are studied. According to these, the relation between RMR and Q is built. The linear relation and the logarithm linear relation between RMR and Q and overbreak as well as underbreak are gained.

论文对洞室围岩的RMR分类和Q分类与超欠挖之间的关系进行详细的研究，研究不同开挖洞径与洞室超欠挖之间的关系，并由此建立了RMR分类和Q分类之间的关系，得出围岩的RMR分类和Q分类与洞室超欠挖呈线性关系或对数线性关系。

Underground PuNan section of Wucunshan Tunnel in Phase I project of Xiamen Airport Road construction is a typical example in China because of its large span shallow underground tunnel located just below concentrated urban architectural complex.

厦门市机场路一期工程梧村山隧道下穿浦南段是国内罕见的下穿密集建筑群的城市浅埋大跨连拱隧道，开挖跨度达34 m，围岩以Ⅵ级围岩为主，埋深仅10~30 m，地下水埋深2~4 m。

The initial stress field of surrounding rocks of shaft is regressively analyzed by 3D finite element method according to in-situ measured data by hydro-fracturing and distribution properties of in-situ stress.

根据竖井围岩地应力场和Kirsch解得到的围岩二次应力场，结合Russenes和陶振宇岩爆判据，进行了竖井岩爆综合预测和分析，得出竖井有轻微和中等岩爆发生的结论，并提出岩爆防治措施。

Meanwhile,the works on ranking and selection of influencing factors of terrene surrounding rocks were completed,which can promote the standard of surrounding rock classi fication.

以某轨道交通二期工程中土质围岩岩土为例，利用灰色关联度分析方法，完成对土质围岩稳定性分级影响因素的排序和筛选。

Affected by excavation and other uncertain factors, the monitoring data of rock pressure is an unsmooth time series, which includes trend term and random part.

围岩压力是隧道开挖后重要的反馈信息之一，受不确定性因素影响，围岩压力监测数据是一个不平稳的时间序列，包括趋势项和随机项。

The results show that the concentration of displacement and stress in surrounding rock intensifies with the increase of excavation steps. The maximum compression and tension stress reach 54 MPa and 3.9 MPa, which are close to the peak strength of surrounding rock. When the tailings are backfilled, the magnitude of floor heaves reduces about by 5 mm, and the maximum compressive stress drops to 32 MPa. Distribution of both stress and displacement fields are improved and the stability of stopes can be ensured during the mining process.

研究结果表明：随着开挖逐步推进，围岩位移不断增大，应力集中现象明显，最大压应力达54 MPa，最大拉应力达3.9 MPa，接近围岩的极限强度；在尾砂回填后，底鼓量下降5 mm，最大压应力降至32 MPa，表明应力场和位移场均得到改善，能确保回采期间采场的稳定。

The results show that advanced detection apparatus DTC-150 can detect geologic formation in front of the mine excavation 100 m away, and can more accurately detect faults, rock fissures, rock broken cinctures and water-rich situation, and the collection velocity can be used to classify the wall rock.Key words: seismic exploration; mine; advanced detection; long distance; multi-wave and multi-component

研究结果表明：采用DTC-150井下超前探测仪器能够较准确地探测到掘进面前方100 m内断层、围岩裂隙、岩石破碎带以及富水情况，据由该仪器获得的波速对围岩进行分类。

It is simulated that water volume is changed with the value of the coverage and permeability index of grouted surrounding rock to control leakage volume.

探讨了特定条件下围岩中渗流场的分布规律，模拟了改变围岩注浆圈的厚度和渗透系数的大小对涌水量的影响。

Based on the knowledge and results gained from detail researches, select some a roadway as trial area to study further and validate the structural rheology and to search the sound countermeasure. The trial roadway, 50 m long, is portended that very large deformation and serious damage will happen, so its stability is very poor and its support very difficult.

基于围岩结构性流变的认识，在金川二矿区1198分段，选择了变形破坏严重、支护难度较大的巷道作为试验巷道(50m)，以进一步研究高应力区结构流变围岩及其工程对策。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。