Abstract:This paper summarises the place and role of mineral exploration engineering in the national economy and its prospect. The establishment and development of the professional training and education system of mineral exploration engineering is reviewed. The scientific research achievements have indicated that the level of the subject has heightened. The facts show that the subject crossing is important to the development of the applied sciences.

Abstract:Drawn upon the experiment and the experience home and abroad, the drilling criteria which is based on the control of the bit penetration amount is proposed to achieve optimum drilling performance. According to the principle of increasing the penetration value, it is necessary and possible to develop quality large size PCDs so as to transcend the limitation of existing diamond drilling. The status quo of the technique is reviewed, and the significance of beefing up scientific experiment and research is emphasized.

Abstract:This paper reviews the use, structure and capability of the core drill. The problems with the drive and transmission systems of the core drill are examined through field tests in the view of the requirements of the drilling process. The versions of core drills are introduced. It is suggested that the version of core drill be considered in shallow, medium deep and deep catalogues.

Abstract:Results of experimental research on diamond surface metallization with electrolyse plating and vacuum plating show that strength, thermal stability and penetration rate of metallized diamond are much better than that of nonmetallilized diamond, and performances of diamond plated with Ti are the best among all plated diamonds. Carbon in carbides such as TiC, Cr 2C 3, formed on diamond surface obtained with vacuum plating comes from diamond, but not from graphite. Therefore, vacuum plating is a prospective diamond surface treatment method.

Abstract:Experiment is made on Centrifugal SHS coat. This paper analyses the structure of coat, the combined mechanism of interface and the influence of technology factor on performances of coat.

Abstract:The characteristics of materials and their heat treatments, which are applied to domestic and abroad mining tri cone bit, were carefully checked and compared. It follows from the analyses that the factors of machining and assembling bit should be taken into consideration besides the factors of improving quality of material and its heat treatment, in order to prolong the life of domestic tri cone bit.

Abstract:为表征金刚石薄膜涂层硬质合金的耐磨性能 ,引入了“耐磨系数”指标。利用自行设计的试验装置 ,在设定的试验条件下 ,对金刚石薄膜涂层硬质合金等 3种不同材料试件的磨耗比进行对比试验 ,并对试验结果进行讨论。

Abstract:介绍一种WC类硬质合金胎体材料配方 ,在胎体材料中添加了微量磷元素 ,通过其活化作用 ,使硬质合金材料在 1 0 60℃温度下烧结成型 ,并通过调节配方中的Co -Ni含量 ,使其具备了所需要的机械性能。并扼要介绍了以YG1 2 -Ni8-P0 .2硬质合金为胎体材料的人造金刚石复合体钻头的试验情况。

Abstract:This article discussed calculation of multi branch pile limit bearing capacity by fitting loading test Q-S curves according to the function Q=Q u(1-Ae -BS ) . Application shows that this method is workable.

Abstract:Since the flood in 1998, the engineering to control the seepage though dam foundations have increased rapidly, varieties of technical method concerned are widely used. High pressure jet grouting is one of these methods. The article discribed the different behaviours and shortcomings of these methods. The application status, application ranges, mechanism of seepage prevention, technical parameters, using techniques and the inspection methods of quality for the high pressure jet grouting technique are stressed.

Abstract:The problems in the free and fixed earth support methods for thd design of the anchored sheet pile wall for excavation are briefly discussed. A new method for the design is proposed. A forces equilibrium rather than moment equilibrium method is adopted to calculate the length from the point where the stress of the soil down to zero to the bottom of the pile. The calculation is simplified by the new method, and the results approach to the goal of safety and cost saving. The details of the calculation procedures and examples to demonstrate the calculation are presented in this paper.

Abstract:Some multi processes newly developed are described with their uses, which includes drilled expanded compaction piling, rammed naturally graded stone column with simultaneous heavy hammer casing, drilled back fill mixed slurry piling, and drilled expanded piling with simultaneous casing.

Abstract:Successful application of jacked concrete pipe pile with larger bearing capacity to high building on condition of deep and thick sand is stated herein at Huangpu, Guangzhou. The application of jacked pile has advantages of shorter construction period, lower cost and non environmental pollution etc. It can be taken as reference for other similar projects.

Abstract:The combination of vacuum point well and pipe well can greatly take the advantages of both. This method not only contents the ground water level after lowering, but also can quickly remove detained ground water. So the slope will be more stability due to the remove of parietal seepage caused by the detained ground water.

Abstract:The highly active fly ash grout provides such advantages as fine grain, good permeability, reliable strength, durability, low cost, compared with common cement grout. The field practice has proved that the highly active fly ash grout can achieve good anti leakage effect and improve obviously the anti leakage quality of the dam foundation when used in water reservoir dam curtain grouting; therefore, it is an ideal anti leakage grout.

Abstract:The rheology and degradability of amorphophallus konjak are studied experimentally with comparison made with other polyesters. It is concluded that amorphophallus konjak will be a good additive for water well drilling fluids and gelling agent for coalbed methane well fracturing fluids.

Abstract:In order to evaluate HTHP properties of the new linear paraffin based drilling fluid (LPBDF), which was recently developed, a series of tests were conducted using selected LPBDF. The evaluation tests include HT aging tests, TH and HTHP rheology tests. Based on the tests, the regression equations were achieved, which can be used to predict the rheological behavior of LPBM under downhole conditions. The results of the study on HTHP properties of LPBM show that LPBDF can be used in deep well.

Abstract:In this paper, the computer layout system for wells structure is introduced. It refers to the hard and soft environment for this system and selecting the data needed for layouting a well structure.

Abstract:The article introducesd a new way to calculate rock's indentation hardness and plastic coefficient based on the data such as stress and displacement getting from traditional indentation hardness instrument. The procedure is developed in Visual Basic 6.0. It is more accurate and easy to use compared with manual calculation method.

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Abstract:Acoustic emission signals of grandiorite and marble were compared and the Kaiser effect properties of the two kinds were also contrasted during low loading in this article, and it is proved at last that the mechanism of Kaiser effect is rock has ability to remember its previous damage.

Abstract:Based on the analysis of the ROP prediction status quo home and abroad, the rock drillability method is chosen to predict the ROP in drilling at the Dongying Subsidence in Shengli Oil Field. The ROP formulae is set up for acoustic ROP prediction, and verified with the field information. ROP prediction is carried out for two wells at the same time, the accuracy of which exceeds 90%.

Abstract:On the base of testing the mechanical properties of common matrix in high temperature, samples of 6 WC(W) base and 6 Ni base matrix were researched and tested. Two types of matrix are provided for selecting in making impregnated diamond bit for Continental Scientific Drilling.

Abstract:According to the research of applying situation of leakage magnetic non destroyed testing technique of drilling both home and abroad, combining the structure of scientific drilling string with the destroy characteristics on the applying prospect of leakage magnetic non destroyed testing in the inspection of drill string for scientific drilling is discussed.

Abstract:The design principle of the ground subsidence monitoring bench march in Shanghai is described all rounds with its evolution, optimisation and construction features. The mineral exploration engineering theory and techniques are applied to design special borehole structures so as to convert the elevations of the formations at different depths to the ground level for correlating measurement. A total of 32 monitoring stations each consisting of one bedrock bench marks and several step bench marks have been set up for decades of years to form the ground subsidence monitoring system in Shanghai, which reflects the soft ground subsidence in Shanghai accurately and in time.

Abstract:The characteristics of hydraulic pipe rammers are reviewed with their structural types and oil distribution configuration. A mathematical model is set up for the movement process of the rammer with an developed imitation program, and based on which the structural parameters are designed. The working principle of UH-3000 hydraulic rammer is detailed with the testing results of its process.

Abstract:This paper introduced the pipe jacking technique in the water drainage pipe jacking project for Beijing North West No. 4 Ring Road-University Road Flyover. It has achieved good results.

Abstract:Narrow vein mining with raise climber is a kind of mechanised mining method, which is safe and efficient. According to the production practice of Rushan Gold Mine and compared with traditional method, the application of raise climber method and its advantages and some problems are discussed in this paper.

Abstract:The profile of the Lijiagou Road Tunnel carried out the short bench and full face excavation. The re bar net preliminary lining mould shotcrete and preliminary and anchor shotcrete are used for support by the use of the semi wet spraying method with sand entrapped in cement. The lining is completed in two steps. Smooth surface blasting is performed.