Method and device for efficiently conveying liquid air for rock breaking

Abstract

The present invention is a method and device for conveying liquid air for rock breaking. It solves the problem that the traditional method has low filling efficiency, which easily causes the liquid air to release energy prematurely, thus affecting the rock breaking effect. The present invention includes zoning the blasting area and grouping the blasting holes; connecting and assembling the main pipe and the branch pipe; laying the branch pipe along the grouped blasting holes; connecting the blasting hole filling pipe with the branch pipe tee joint; synchronously filling each blasting hole in the area; removing the filling pipeline after filling is completed; closing the main valve and recycling the pipeline device. The present invention greatly improves the liquid air filling efficiency, effectively reduces the liquid air energy loss and gas waste caused by asynchronous liquid air filling and long filling time during large-scale rock breaking operations, and improves the liquid air rock breaking quality.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid air rock breaking, and in particular to a method and device for efficiently conveying liquid air for rock breaking. Background Art

[0002] In rock-breaking operations using liquid air, detonation must occur when the liquid air in the blasthole is in a supercritical state. Due to geothermal energy, the liquid air charged into the blasthole heats up rapidly, resulting in a very short duration of this supercritical state. To achieve optimal blasting results, the liquid air charge for all blasting operations must be completed in the shortest possible time. Existing liquid air charging operations utilize a "one-to-many" delivery pipeline system, with a single main pipe connected to multiple branch pipes. These pipes are only equipped with valves at the beginning, connecting the end of each branch pipe to the inlet port in the blasthole. This process involves charging the liquid air hole by hole, resulting in low charging efficiency and a tendency to cause premature energy release, affecting rock-breaking effectiveness and hindering the widespread application of liquid air rock-breaking. Summary of the Invention

[0003] The purpose of the present invention is to provide a method and pipeline device for efficiently conveying liquid air, so as to solve the problems of low filling efficiency and poor rock breaking quality of existing liquid air.

[0004] The present invention is achieved in that:

[0005] A device for efficiently conveying liquid air for rock breaking comprises a main pipe 1 connected at one end to a liquid air source and at the other end to an input end of a multi-way connector 3. The output ends of the multi-way connector 3 are respectively connected to the head end of a branch pipe 2. The branch pipe 2 is composed of several branch pipes connected in series with the connection ends of a tee connector 201. A valve 202 is provided on the output end of the tee connector 201. The output end of the tee connector 201 is connected to a blasthole filling pipe. The end of the branch pipe 2 is sealed.

[0006] (1) Divide the blasting area into two-dimensional partitions and then group the blasting holes within the partitions.

[0007] The blasting division and blasting hole grouping should be considered in combination with the liquid air supply situation. The number of blasting holes in the same group is preferably 4.

[0008] (2) Assemble the main pipe and branch pipe for conveying liquid air through multi-way joints and three-way joints. Before assembly, the number of branch pipes should be determined according to the location, spacing and grouping of the blasting holes. During assembly, it is advisable to operate nearby to reduce the handling work after assembly. Reliable measures should be taken during the assembly process to prevent debris from entering the pipe. After assembly, grease can be applied to the joints to increase air tightness.

[0009] (3) Arrange the branch pipes according to the location of the blasting holes, so that each branch pipe passes through all the blasting holes in the group and the branch pipe tee joints are placed near the blasting holes.

[0010] (4) Connect the branch pipe tee to the blast hole filling pipe and open the tee valve.

[0011] (5) Connect the gas source, open the main valve, and start filling.

[0012] (6) When the exhaust pipe in the blasting hole discharges light blue gas, close the valve of the corresponding three-way joint and disconnect the corresponding three-way joint from the filling pipe.

[0013] Before the blasting hole is filled with liquid air, the gas discharged from the exhaust pipe is white in color, and turns light blue after it is filled.

[0014] (7) Before disconnecting the branch pipe tee joint from the filling pipe, the tee valve should be closed. After disconnecting, the filling pipe should be blocked in time.

[0015] After all blasting holes are filled with liquid, the main valve is closed and the pipeline device is retracted.

[0016] In step (3), to facilitate the layout of branch pipes, the length of the branch pipes is preferably 1.5 to 2 times the spacing between blasting holes. During the layout process, the valve of the three-way joint should be in a closed state to prevent debris from entering.

[0017] In step (5), the liquid air source is provided by a tank truck. During transportation by the tank truck, the tank truck's own power can be used to appropriately pressurize the liquid to speed up the filling process. During the filling process, attention should be paid to the connection of the pipeline device at all times, and any problems should be handled in a timely manner.

[0018] The advantages of the present invention are as follows:

[0019] Through the scientific layout of pipelines and the connection of various components of the pipeline device, favorable conditions are created for the simultaneous filling of liquid air across the entire range. This method greatly improves the efficiency of liquid air filling, effectively reduces the energy loss and gas waste of liquid air caused by asynchronous filling and long filling time during large-scale rock breaking operations, and improves the quality of liquid air rock breaking.

[0020] Figure 1 The following is a schematic diagram of the process for efficient liquid air delivery:

[0021] Figure 2 Shown is a schematic diagram of the layout of the liquid air delivery pipeline;

[0022] Figure 3 Shown is a schematic diagram of a "one-to-many" connector;

[0023] Figure 4 The diagram shows the branch pipe. Implementation Method

[0024] A device for efficiently conveying liquid air for rock breaking comprises a main pipe 1 connected at one end to a liquid air source and at the other end to an input end of a multi-way connector 3. The output ends of the multi-way connector 3 are respectively connected to the head end of a branch pipe 2. The branch pipe 2 is composed of several branch pipes connected in series with the connection ends of a tee connector 201. A valve 202 is provided on the output end of the tee connector 201. The output end of the tee connector 201 is connected to a blasthole filling pipe. The end of the branch pipe 2 is sealed.

[0025] (1) Divide the blasting area into two-dimensional partitions and then group the blasting holes within the partitions.

[0026] The blasting division and blasting hole grouping should be considered in combination with the liquid air supply situation. The number of blasting holes in the same group is preferably 4.

[0027] (2) Assemble the main pipe and branch pipe for conveying liquid air through multi-way joints and three-way joints. Before assembly, the number of branch pipes should be determined according to the location, spacing and grouping of the blasting holes. During assembly, it is advisable to operate nearby to reduce the handling work after assembly. Reliable measures should be taken during the assembly process to prevent debris from entering the pipe. After assembly, grease can be applied to the joints to increase air tightness.

[0028] (3) Arrange the branch pipes according to the location of the blasting holes, so that each branch pipe passes through all the blasting holes in the group and the branch pipe tee joints are placed near the blasting holes.

[0029] (4) Connect the branch pipe tee to the blast hole filling pipe and open the tee valve.

[0030] (5) Connect the gas source, open the main valve, and start filling.

[0031] (6) When the exhaust pipe in the blasting hole discharges light blue gas, close the valve of the corresponding three-way joint and disconnect the corresponding three-way joint from the filling pipe.

[0032] Before the blasting hole is filled with liquid air, the gas discharged from the exhaust pipe is white in color, and turns light blue after it is filled.

[0033] (7) Before disconnecting the branch pipe tee joint from the filling pipe, the tee valve should be closed. After disconnecting, the filling pipe should be blocked in time.

[0034] (8) After all blasting holes are filled with liquid, close the main valve and retract the pipeline device. In step (3), in order to facilitate the layout of branch pipes, the length of the branch pipes is preferably 1.5 to 2 times the spacing between the blasting holes. During the layout process, the valve of the three-way joint should be in a closed state to prevent the entry of debris. In step (5), the liquid air source is a tank truck. When transported by the tank truck, the tank truck's own power can be used to appropriately pressurize the liquid to speed up the filling process. During the filling process, attention should be paid to the connection of the pipeline device and problems should be handled in a timely manner.

Claims

1. A method for efficiently conveying liquid air for rock breaking, characterized in that: One end of the main pipe is connected to the liquid air source, and the other end is connected to the input end of the multi-way joint. The output ends of the multi-way joint are respectively connected to the head end of a branch pipe. The branch pipe is composed of several branch pipes connected in series through the connection ends of the three-way joint. There is a valve on the output end of the three-way joint. The output end of the three-way joint is connected to the blasthole filling pipe. The end of the branch pipe is sealed. The steps are as follows: (1) Divide the blasting area into two zones, and then group the blasting holes within the zones. The number of blasting holes in the same group is 4. (2) Assemble the main pipe and branch pipes for conveying liquid air through multi-way joints and tee joints. Before assembly, determine the number of branch pipes according to the location, spacing and grouping of the blasting holes. After assembly, apply grease to the joints to increase air tightness. (3) Arrange the branch pipes according to the location of the blasting holes, so that each branch pipe passes through all the blasting holes in the group and the three-way joint is placed near the blasting hole. (4) Connect the three-way joint to the blast hole filling pipe and open the valve of the three-way joint. (5) Connect the gas source, open the main valve, and start filling. (6) When the exhaust pipe in the blasting hole discharges light blue gas, close the valve of the corresponding three-way joint and disconnect the corresponding three-way joint from the blasting hole filling pipe. (7) After disconnecting, seal the blast hole filling pipe in time. (8) After all blasting holes are filled with liquid, close the main valve and retract the pipeline device.

2. The method for efficiently conveying liquid air for rock breaking according to claim 1, characterized in that: In step (3), to facilitate the layout of branch pipes, the length of the branch pipes is 1.5 to 2 times the spacing between blasting holes. During the layout process, the valve of the three-way joint is in a closed state to prevent debris from entering.

3. The method for efficiently conveying liquid air for rock breaking according to claim 1, characterized in that: In step (5), the liquid air source is provided by a tank truck. During transportation by the tank truck, the tank truck's own power is used to pressurize the liquid to speed up the filling process. During the filling process, attention is paid to the connection of the pipeline device at all times to deal with any problems in a timely manner.

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