Abstract:The present situation of international drilling market and the development of solid mineral drilling techniques are sized up. Main development of solid mineral drilling techniques in China in recent 10 years is summarized, with the proposal put forward for developing this technique in China.

Abstract:Introduction is made on the development from the beginning to this day about tunnel engineering of geology and minerals system, as well as the situation of realizing mechanization; popularizing and applying latest technique; studying new technology, new methods, new equipments and so on.

Abstract:Based on the successful experience of constructing of coalbed methane well, the construction technique is introduced on drilling, well protection, coalbed reconstruction and so on.

Abstract:Properties and developing trends are described on water based, oil based and synthetic based drilling fluids.

Abstract:Using the combination of bored pile and jet grouting as the deep foundational pit supporting structure is presented. This combining structure have the advantages of good seepage proof property, rapid construction speed and low construction cost. And this new supporting structure owns a great future.

Abstract:The combination of conjunct bored piles, high pressure jet grouting and diaphragm wall is an effective approach to support the deep foundational pit in complex condition.

Abstract:The principle of high pressure jet grouting is briefly introduced. The mechanism of underground solidification and induration of cement clay grout is emphatically discussed and tested and vertified in engineering.

Abstract:The importance of ensuring quality of grouting pile head and chief points of quality of grouting pile head are discussed and analyzed. Measures to ensure and to improve quality of grouting pile head is present.

Abstract:CQ multiple point successive photoelectric surveying instrument is a kind surveying instrument composed of magnetic balls and CCD photographic devices. The inclination and azimuth can be read out through the surface monitor.

Abstract:Using vacuum gas phase deposition, diamond surface is coated with strong carbide metal or alloy membrane. The membrane can obviously streng then the bonding strength of diamonds in metal base through bonding chemically with diamonds and improving immersion action of metal base. Therefor the performance and lifetime of diamond bit are improved.

Abstract:The application field of thin kerf diamond bits is introduced. The way to achieve better economic results of thin kerf diamond bit is presented based on manufaction, use and wear of bit.

Abstract:The application scheme of the artificial freezing method in Xuanwu Lake subaqueous highway tunnel construction and the constructing procedure of the freezing method are introduced. The characters and advantages of the artificial freezing method are sized up.

Abstract:The present situation of various safety device in incline haulage and the technical characteristic of series of XRC 1, XRC 2 manrider in incline are introduced.