12results 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 belongs to the technical field of open caisson control, and discloses a tunneling and bottom sealing method for a super-large-section vertical shaft, a first tunneling machine is adopted for tunneling an outer ring area of the bottom of the shaft along a sliding rail, a second tunneling machine is adopted for rotatably tunneling an inner ring area around the central axis of a rotary disc, the tunneling range is effectively expanded, and the construction requirement of the super-large-section vertical shaft is met; wherein the ring beam is pre-embedded around the upper part of the inner wall of the blade foot to support the arrangement of the slide rail and ensure the stable operation of the first heading machine; the working radius of the central operation platform is adjusted through the telescopic second heading machine so as to adapt to heading areas of different sizes, and the supporting legs can be stably clamped to the ring beam to maintain the stability of the central operation platform; according to the area ratio of the inner ring area to the outer ring area, the tunneling speed of the first tunneling machine and the second tunneling machine is adjusted, and the excavation consistency is guaranteed; the brush arm machine slides along the sliding rail and drives the brush head to be attached to the side wall of the blade foot for cleaning, it is ensured that no impurity is attached to the side wall of the blade foot, and structural hidden dangers caused by local weakness of the back cover are avoided.

The invention provides a novel cutting and sawing combined cantilever tunneling device and method.The novel cutting and sawing combined cantilever tunneling device comprises a synchronous multi-track cutting device, a multipurpose forcible entry drilling device and a control system, the synchronous multi-track cutting device comprises a rotatable base, an execution large arm, a rotating device and a cutting and sawing assembly, and the rotatable base is arranged on a cantilever tunneling machine body; one end of the execution big arm is arranged on a rotatable base, the rotatable base can drive the execution big arm to rotate in the horizontal direction, and an adjusting mechanism is arranged on the execution big arm; and the control system is used for controlling the actions of the synchronous multi-track cutting device and the multipurpose forcible entry drilling device and controlling the cutting, forcible entry and / or drilling process according to operation requirements. According to the invention, a new design scheme of combining the cutting saw and the cantilever tunneling machine is utilized, so that the cutting saw and mechanical combined tunneling of the hard rock can be realized.

The invention relates to a soft rock tunnel excavation method, device, equipment, system and medium, in particular to the technical field of tunnel engineering.When a preset milling device is used for milling soft rock in a target construction area, a preset scanning device is used for scanning the target construction area; the method comprises the following steps: acquiring a current tunnel outline formed in a target construction area, judging whether the current tunnel outline coincides with a preset tunnel outline or not, and if yes, returning to execute the scanning operation on the target construction area by using the preset scanning equipment when the soft rock in the target construction area is milled by using the preset milling equipment, and if not, executing the scanning operation on the target construction area by using the preset scanning equipment. According to the method, the defects that the construction efficiency of the tunnel is affected and the forming quality is poor due to over-excavation or under-excavation caused by the surrounding rock characteristics of the weak surrounding rock tunnel can be overcome, and the purpose of efficiently excavating the tunnel is achieved.

The present invention proposes an internal circulation water cooling device for a tunnel boring machine, including a refrigeration circulation system, the refrigeration circulation system including a compressor, the compressor is connected to a condenser, the condenser is connected to a throttle valve, the throttle valve is connected to an evaporator, the evaporator is in contact with the internal circulation cooling system for heat exchange, and the condenser is in contact with the tunnel air circulation system for heat exchange. The advantages of the present invention are: reducing the amount of external water consumed by the tunnel boring machine, avoiding the generation of a large amount of water at the bottom and excavation surface of a particularly long / downhill tunnel, avoiding high-power drainage pumps and a large number of relay drainage pump stations, reducing the project cost, and ensuring efficient excavation of the tunnel boring machine.

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.

The invention relates to the field of metal mine construction, in particular to a slotting structure for circular hole distribution of a small-section roadway of a tungsten mine and a construction method, and the slotting structure and the steps S1, S2, S3, S4, S5, S6, S7, S8 and S9 for construction through the slotting structure are included. Through the arrangement of the slotting structure and the mode that the second slotting holes and the empty holes are formed in the circumference with the first slotting hole as the circle center, the blasting stress can be effectively dispersed, the utilization rate of explosives is effectively optimized, the slotting efficiency and stability are improved, in addition, small-diameter empty holes are replaced with large-diameter empty holes, the number of blast holes is reduced, and the blasting efficiency is improved. Meanwhile, the second slotting holes and the empty holes are arranged in a staggered mode, the purpose of reducing blast holes can be achieved, and the blasting effect is not affected. Through the setting of S1, S2, S3, S4, S5, S6, S7, S8 and S9, tunneling of the small-section roadway can be effectively guided, the standardization and repeatability of operation are effectively ensured, and the tunneling efficiency is improved.

The present invention discloses a dual-mode shield machine with adjustable density, which has a mud-water working state, an earth pressure working state, and an adjustable density working state. When it is in the adjustable density working state, the mud-water bin is connected to the air cushion bin, the slurry inlet pipeline and the slurry replenishment pipeline are opened, the conveying device is separated from the outlet of the screw machine, and the outlet of the screw machine is connected to the mud box, the density measurement pipeline is opened and the mud density in the mud-water bin is measured, the measured value is compared with the standard range, and the input amount of the slurry inlet pipeline and the slurry replenishment pipeline and the output amount of the screw machine are adjusted according to the comparison result, so that the mud density in the mud-water bin is kept within the standard range. By adopting the above technical scheme, the present invention switches the mud-water and earth pressure modes for different strata geology, especially under the condition that the pressure control cannot form an effective mud film under the extremely special geology such as karst caves and soil caves, the density pressure gradient control is used to replace the traditional pressure control, so as to achieve efficient excavation under complex geology.

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.

The invention relates to the technical field of drilling of soil layers or rocks, and provides a self-adaptive tunneling robot for stress environment reconstruction and a tunneling method thereof.The self-adaptive tunneling robot comprises a dynamic stable supporting system, a splitting tensile shear rock breaking system, a rotary supporting and positioning system, a prefabricated free face system, a rock drilling system, a guide rail system, a self-adaptive intelligent control system and a walking deslagging system. The high stress in the rock mass is relieved through the prefabricated free surface system, the equipment is prevented from being clamped by the rock or the drill jamming problem is quickly and safely solved, and the rock breaking efficiency and the equipment safety are effectively improved. The self-adaptive intelligent control system can obtain tunneling parameters in real time, analyze the rock mass quality of a to-be-tunneled area according to the earth sound sensor and the rotation torque of the drill rod, and automatically adjust operation parameters to adapt to changes of geological conditions. The robot can conduct continuous operation under the hard rock geological condition, the downtime is shortened, the service life of equipment is prolonged, environmental pollution is reduced, and the tunneling operation efficiency is improved.

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.

The present invention discloses a tunnel excavation grouting support construction method applied to water-rich fine sand strata. Aiming at the characteristics of water-rich strata and combining on-site construction conditions, a method combining three grouting support methods, namely ground grouting, full-section grouting and advanced small-duct grouting, is adopted to support the tunnel excavation process, and the tunnel strata are strengthened from three dimensions and three directions to avoid the dangers of collapse, water seepage and the like during the tunnel excavation process, thereby greatly improving the support strength and meeting the requirements of the preliminary design, thus realizing the engineering application of safely and efficiently excavating tunnels in water-rich fine sand strata. In the advanced small-duct grouting construction, strong wind pressure is used for blowing holes, which is easier to form holes and less prone to collapse than drilling rod drilling, and is faster and more efficient than drilling holes with a drilling machine, thereby improving the overall construction progress, being not restricted by the on-site environment and the depth of dark excavation, and having high construction efficiency.