4results about How to "Efficient excavation" patented technology

The invention provides a tunnel hard rock non-blasting excavation method. The tunnel hard rock non-blasting excavation method can realize efficient excavation of complete or relatively complete hard rock without adopting large excavation equipment such as a heading machine and the like , and is characterized by comprising the following steps of 1, drilling contour holes along a tunnel face contour line so as to determine a tunnel excavation range, and determining each drilling and grooving position according to the excavation range, then, forming and drilling a plurality of cavity expanding holes in the position close to the positions; 2, drilling a plurality of rows of guide holes between the contour holes and the cavity expanding holes; 3, drilling groove forming holes which are meshed and overlapped with each other at the determined drilling and grooving positions, and finally forming a groove cavity; 4, enabling the cavity expanding holes near the groove cavity to be subjected to impact crushing, and therefore expanding excavation is conducted on the groove cavity; 5, according to a certain excavation sequence, starting from the guide holes close to the expanded and excavated groove cavity, adopting a hydraulic breaking hammer for conducting impact breaking on the guide holes, so that excavation of the rock mass of a main body part is completed; and 6, conducting impact crushing on the contour holes.

The invention relates to the technical field of shield tunneling machine automatic control, in particular to an automatic control system and method for a shield tunneling machine muddy water conveying system, and the method comprises the following steps: when a shield tunneling machine starts tunneling or stops tunneling, executing a bypass mode, and transiting from the bypass mode to a tunneling mode or transiting from the bypass mode to a stop mode. According to the automatic control system and method, the tunneling mode, the stop mode and the bypass mode are set, the muddy water conveying system is automatically controlled to enter the bypass mode according to whether the shield tunneling machine conducts tunneling or not, then the muddy water conveying system enters the tunneling mode or the stop mode from the bypass mode, and through transition of the bypass mode, the muddy water conveying system is automatically controlled to enter the tunneling mode or the stop mode. And the stability of muddy water circulation and pressure adjustment can be ensured.

This utility model discloses an integrated set of equipment for excavation, loading, transportation, and unloading in long and deep foundation pit earthwork projects. It includes a tracked mobile bucket wheel reclaimer, a mobile telescopic conveyor, a prefabricated conveyor corridor, and a tracked mobile placing boom. After excavation, the soil from the tracked mobile bucket wheel reclaimer is fed into the inlet of the mobile telescopic conveyor. The outlet of the mobile telescopic conveyor is connected to the inlet of the prefabricated conveyor corridor, and the outlet of the prefabricated conveyor corridor is connected to the inlet hopper of the tracked mobile placing boom. The prefabricated conveyor corridor is supported by two tracked walking mechanisms near both ends. The tracked mobile placing boom is located outside the pit at the material stockpile site. This utility model eliminates the need for dump trucks for transportation, enabling efficient excavation and stockpiling of soil within deep foundation pits. Furthermore, it offers enhanced safety during transportation and stockpiling. All equipment can move via tracks, allowing for rapid relocation to the next location and improving relocation efficiency.

This invention discloses a seismic geological guidance method for safe and efficient tunneling of tunnel boring machines (TBMs) in coal mines, comprising the following steps: acquiring seismic data and processing its undulations to obtain a seismic time profile; loading the designed shield line and cutting a seismic time profile of the shield line along the designed shield line on the seismic time profile; loading the borehole positions and obtaining the depth values ​​of each target layer based on the borehole positions; performing a detailed interpretation of the seismic time profile of the shield line based on the depth values ​​to obtain a time-structure map and obtaining the inter-layer velocity of each target layer at different borehole positions; performing gridding based on the inter-layer velocity to obtain a velocity profile map of the designed shield line; and performing time-depth conversion between the time-structure map and the velocity profile map of the designed shield line based on the inter-layer velocity to obtain a depth-structure profile map, accurately determining the spatial location of the target layer. This invention achieves the goal of improving the accuracy of the spatial location of the layer in the tunneling profile of the TBM.