Abstract:In order to overcome the disadvantages of brine development by aqui-soluble through a single well in the rock salt,the controlled directional drilling down -hole motor is employed to make a pair of me-dium-radius of curvature ,highly inclined directional wells intersected with each other in the subsurface salt forma-tion,realizing brine developed by the intersected wells .Therefore ,description :Emphasized on the new drilling tech-nique,testing and study results of the intersected wells.

Abstract:开拓天然滤床渗流井取水，根据江河流量不同，取水量达１～５万ｍ￣３／ｄ或更大。与传统的地面钻水井、挖大井或直接取江河水净化的方法有本质的区别。取水技术是以岩土钻凿综合新技术为依托，从河床砂卵砾石层底部通过集水竖井、导井、江底隧硐（输水平巷）和钻进渗流井群取潜流水。与传统方法相比具有维护简便，利于后续延伸工程的特点。

Abstract:人造卡邦金刚石是用特种石墨和触媒在７７ｋｂ（７７００ＭＰａ）以上压力和１５００°Ｋ左右温度下合成的。经微观和宏观检测，它具有结构致密、晶粒间以金刚石键相结合的微观特征，与天然卡邦结构相近；它在宏观上表现出显微硬度高（相当于天然单晶）、抗压强度高、耐磨性好、颗粒大、可指定成形等优点及耐热性差的不足。人造卡邦金刚石的研究成功并将它应用于工业、国防和科技各个方面，使当今人造金刚石发展跃上新台阶。

Abstract:Testing and study of solidified clay mud used in water shut -off in mines,which,involve hy-dro-geology of the mine area,preparation ,performance and injection study of the of the mud fluid,quality control and economical efficiency analized.

Abstract:With reference to the field case of Zhengzhou ,Airline Hotel foundation construction,a description ismade on the design principle ,method and main caculation criteria of the powder jetting method used in anti -seepage diaphragm with deep foundation pit excavation ,as well as the testing method and data analysis for determination of the major parameters of this method ,Special technical measures employed in the construction and results are introduced .Several problems of the method ,which need further discussions.

Abstract:considering problems existing in auger,underreamed piles in loose sand and boulder formation,auger drilled and hydraulic underreamed grouted piling technique is developed successfully applied,Description is fo-cused on structure of drill rig and underreamer,as well as technical economical benefit.

Abstract:Selection and lay out of equipment and under -water concrete grouting process in are described with respect to field cases .Analysis and comparison are made on reliability of under-water concrete grouting by the turn-ing plate valve.

Abstract:An effective method is obtained through study on high pressure grouting process in soil anchor installation.

Abstract:A performance comparison is given to the existing geo-engineering drills according to the procedures of geo-techs in practice ,an selection viewpoints are provided.

Abstract:Equipped with suitable Derrick and well controlled device in drilling a shallow gas well ,water drills proved to be able to reduce shallow gas well drilling cost.

Abstract:New achievements have made in opening the geological market for the past two years Description is focused on experience of five aspects.

Abstract:Bore-hole pressure calculation formula is discussed,bore -hole pressure drop factor is defined Press-sure,pressure drop factor and foam mud density are calculated at different depths in the given condition;a curve is drawn ;maximum pressure drop facto applicable depth are determinded.

Abstract:Design of smooth surface explosion parameters is fully analysied ,theoretically and practially .It is proposed that better technical and economical efficiency could achieved by combining approximative theoretical calculation with engineering analogue.