1、外文文献The mechanical boring machine is mining and tunneling industry application the mechanical boring machine has the unique performance and the flexibility, can the tunneling softly to the medium intensity rock layer, therefore, widely uses in the underground mining and tunnels tunneling. Mechanical
2、 boring machines success applies a crucial question is development ability accurate and the reliable estimate digit, machine production ability and the correlation position cost. Recently this article introduced and discusses the work which completed to take the forecast model which in the geomechan
3、ics research institute Colorado Mining Academy on the use historical data use displayed. This model is based on the data which widespread collects on the spot, from different mechanical boring machine motion, in various geological stratum. This document also discussed has developed this database, as
4、 well as produced from this real diagnosis performance prediction equation obtained estimate mechanical boring machine cutting rate and bit expense. widely uses the machinery to excavate the system is more and more tremendous pressure which one tendency subscribes, leaves the tradition to mining and
5、 the civil construction profession to drill digs and demolishes the method, enhances the productive forces and reduces the cost. The extra advantage, the mining machine, including the remarkable improvement security, reduced the ground safeguard request and the few personnel. These superiority, in a
6、ddition recently strengthened in the mechanical machines performance and the reliability, has caused in the mechanical miner to adopt the big share ledge excavation market. the mechanical boring machine is the most widespread use underground portion cross section excavates machine, softly to medium
7、intensity rock, specially sedimetary rock. They are use in expanding and the production in soft rock mining industry (i.e. main haulage drift, tunnel, cross reduces and so on), specially in coal, industry mineral and evaporite. In the civil construction, the widespread utilization which they find, e
8、xcavates the tunnel (railroad, road, sewage treatment, conduction current hole and so on), in the soft ground situation, as well as to expand each kind of underground structure which and be restored to health. Their ability, excavation, nearly any individual opening, also causes them to be attractiv
9、e, these mining and civil construction projects each kind of open size and the configuration files need to construct. in addition, its high fluidity and the flexibility, the mechanical boring machine is the universal somewhat low capital cost system compares, other mechanical excavators. Because of
10、the high cutting power density, as a result of the small cutting drum, they provides ability, the excavation rock is more difficult and the grinding compound compared to theirs colleague, like continual miner and clothes eating insect.Past 50 year mechanical boring machine the mechanical boring mach
11、ine developed for the first time the machinery excavated the coal in the early 50s. Today, its application domain expanded, surpasses coal mining, because increases unceasingly the performance brings new technological development and design improvement. The major betterments measure has obtained inc
12、rease which with steady steps constituted in the past 50 years, the machine weight, the size and a cutting authority, the improvement design upsurge, the solemn gram took up the load system, a more effective cutting design, the metallurgy development, was cutting the drill bit, the progress, the hyd
13、raulic pressure and the electrical system, and widely used the automation and the remote control function. All these, have caused the intense enhancement, in cutters ability, systems usability and service life. the machines weight has reached as high as 120 tons, provides is stabler and severer (few
14、 vibrations, few services) the platform, from a higher thrust force, may produce an attack more difficult rock layer. Should cut heads authority already to have obvious increase, the close 500 kilowatts let the high torque ability. The modern machine has ability to reduce the cross section to surpas
15、s 100 square meters from a fixed point. The computer auxiliary cutting lacing design already developed a stage, causes the design the most superior position layout, will achieve the maximum efficiency will meet in the rock and the geological condition. Cuts the drill bit to evolve, from simple chise
16、l strong cone-shape position. This silts collection and the transportation system have also experienced the significant improvement, increases productivity which can achieve. Loads the aircraft parking area, now may make takes a delaying merely provides the mobility and the flexibility. The machine may provide with the rock anchor rod supports and protections and suppresses the dust automatically the equipment, enhances the trouble-free service personnels title. They may also provi
