120results about How to "Reduce blasting vibration" patented technology

The invention relates to a multi-row micro-differential roadbed deep hole blasting construction method, which comprises the following steps of: (1) selecting blasting parameters; (2) calculating security; (3) arranging a stair and a free face; (4) distributing holes and drilling holes; and (5) blasting. The blasting method is a multi-row deep hole millisecond micro-differential blasting method; and the blasting is performed by pull trough blasting and side slope blasting in a roadbed sequentially, wherein the pull trough blasting is loose blasting and the side slope blasting is precraking blasting. In the method, a shock conducting tube non-electric priming system micro-differential control blasting technology, a comprehensive blasting construction scheme of loose blasting, the deep hole millisecond micro-differential blasting technology and the roadbed side slope precraking blasting technology, and a wide-pitch and low-resistance hole distribution mode are adopted, so that explosivesand detonators are saved, the drilling mechanization degree is enhanced, the labor cost is reduced, the blasting effect is enhanced, the large rate of blast rocks is reduced, the material abandoning rate is reduced and harms of blasting vibration, impact waves, flying stones and the like are reduced; furthermore, when the blasting effect is enhanced and the stability of the blast roadbed side slope rocks is guaranteed, the absolute safety of blasting can be guaranteed.

The invention discloses an aqueous medium energy transition blasting method and charging cavity. The aqueous medium energy transition blasting method comprises the steps that firstly, an aqueous medium and explosives with the mass ratio larger than or equal to an optimal value are mounted in the explosive charging cavity of a blasting medium, and the explosives and the aqueous medium are isolated from each other; and then the explosives mounted in the explosive charging cavity are detonated. The aqueous medium and the explosives with the mass ratio larger than or equal to the optimal value M are mounted in the charging cavity, the explosives and the aqueous medium are isolated from each other, and the optimal value M is the ratio of explosion heat of the explosives adopted in the blasting process to heat energy released when water is synthesized by hydrogen and oxygen. The aqueous medium energy transition blasting method and charging cavity have the beneficial effects that the effective utilization rate of energy of the explosives can be increased, the blasting effect of the explosives on the blasting medium can be improved, blasting damage can be reduced, and blasting smoke is less.

The invention relates to a dry ice blasting method and a dry ice blasting device, and belongs to the field of engineering blasting. The dry ice blasting device comprises a spray head, a cylinder body, a tail cover and a one-way valve, wherein the spray head is provided with an exhaust hole; the tail cover is provided with a water inlet hole; a sealing gasket is arranged between the cylinder body and the tail cover; a blasting sheet is arranged between the cylinder body and the spray head; and the tail cover is communicated with the one-way valve through the water inlet hole. The dry ice blasting method comprises the following steps: drilling in a coal bed; assembling the dry ice blasting device, and filling the dry ice blasting device with dry ice and a heating bag; connecting the dry ice blasting device with a water pipe, and placing into a blast hole; and communicating with a water source, and injecting water into the dry ice blasting device, wherein the heating bag inside the cylinder body fast releases heat when encountering water so as to urge the dry ice to be fast sublimated into carbon dioxide gas, when gas pressure exceeds the design pressure of the blasting sheet, the instant blasting of the blasting sheet is caused, and the carbon dioxide gas is fast discharged through the exhaust hole formed in the spray head to form impaction and expansion extrusion on the wall of the blast hole, so that the blasting is realized. The dry ice blasting method and the dry ice blasting device which are disclosed by the invention have the advantages of achieving the bursting at normal temperature, generating no flame or toxic gas and being suitable for a coal mine with gas and coal dust explosion risks.

The invention discloses a dual-area slotting blast hole arrangement structure and a blasting sinking method applied to the structure. The structure comprises two blasting slotting hole areas symmetrically arranged with respect to the center of the free face of a courtyard, each blasting slotting hole area comprises a center charging hole and a plurality of empty holes arranged around the center charging hole; a ring of peripheral holes are formed in the periphery of each blasting slotting area, the center charging holes and the peripheral hoes are filled with explosive charges, and a plurality of auxiliary holes are formed between the blasting slotting areas and the peripheral holes and are filled with explosive charges. The method is simple in working procedure, operation is easy, the one-time sinking height is large, reliability is high, the sinking effect is good, the number of drilled holes is small, energy consumption is low, and the blasting vibration is small.

The invention discloses a partition control blasting method for a tunnel rock drilling project. The partition control blasting method sequentially comprises the steps that a rock drilling working surface is partitioned into a slotting partition, an upper and down slot expanding partition, an auxiliary collapsing partition, an auxiliary collapse lifting partition and a light blasting partition, and all the partitions are drilled to form holes; the blast holes are filled with explosives; rock drilling section blasting is started; the slotting partition and the upper and down slot expanding partition are blasted; then the auxiliary collapse lifting partition is blasted; the auxiliary collapsing partition is blasted; finally the light blasting partition is blasted. The partition control blasting method is a project blasting method used for underground rock drilling projects with large sections and has the advantages that the blasting vibration can be controlled, and the blasting effect can be improved.

The invention discloses a subsection millisecond differential blasting method in a blasthole, which mainly comprises the following operating steps of filling explosives in a sectioned manner by using a spaced loading method in the blasthole, wherein the length of each subsection of filled explosives is equal; in the explosive filling process, enabling the distance between every two adjacent subsections of explosives is greater than an induced detonation distance; determining continuous coupling explosive loading parameters according to an empirical formula of medium-length hole parameters and further determining specific parameters of divided charge in the blasthole; and densely filling a space between every two adjacent subsections of explosives by using materials such as clay and rock powder, wherein each subsection of explosives is detonated by using a detonator, all ways of initiation are reverse initiation, namely all detonators are arranged at the bottoms of the subsections filled with the explosives after being arranged in igniting explosive packages, the energy-gathering caves of the detonators face to apertures, the differential interval time of the subsections filled with the explosives is 15-40 milliseconds, and the initiation sequence of the subsections filled with the explosives is from top to bottom. According to the subsection millisecond differential blasting method in the blasthole, blast vibration can be further reduced on the basis of the millisecond blasting among blastholes and the blasting crushing effect can be effectively improved.

The invention relates to the technical field of tunnel gun hole blasting vibration, in particular to an efficient segmented blasting method in a tunneling process. Gun holes are distributed according to a tunneling section, geological conditions, circulating footage and the like; the in-hole segmented millisecond blasting is performed by a digital electronic detonator; the millisecond time precision is improved; the first blasting of explosives at the upper parts of the gun holes is realized; and a free surface is provided for blasting of explosives at the lower parts, so that the blasting effect is guaranteed. The method adopts the in-hole segmented millisecond blasting, reduces the blasting vibration speed, and increases the circulating footage.

The invention discloses a mining method for stoping a high-dipping thick orebody with the medium and above stability in an ore mass. The method comprises the steps that an inverted-stepped mining faceis arranged in the thickness direction of the orebody in an ore room, mining is advanced from bottom to top, the mining face part close to a hanging wall is ahead of the mining face part close to a lying wall by a certain height, the advanced mining height of the mining face part close to the hanging wall is utilized to provide an operation space, a shallow hole is drilled upwards in the operation space, and a horizontally parallel medium-length hole is drilled in the direction of the lying wall to blast and break ores; and an anchor rod is used for anchoring partial unstable rocks on the hanging wall in the operation space, a part of the mined ores is temporarily left in the ore room to serve as a protective bottom column and a buffer layer of the hanging wall and provide a standing platform for upward operation and temporarily bearing hanging wall rocks, and a large quantity of ores are removed after ore room exploration is completed. The mining method is beneficial for reducing mixing of waste rocks in the mining process of the high-dipping thick orebody and improving the recycling ratio of resources, the blackness of the ores is even, the stope preparation work amount is less,and rock drilling and blast working are easy to organize.

The invention relates to a tunnel empty-hole mud vibration-reduction-control blasting method capable of reducing vibration and noise. According to the method, hole drilling is positioned according to a drilling and blasting arrangement diagram; before powder charging, high-pressure air is used for sweeping holes, rock emulsion explosives and non-electric second-delay detonators are respectively selected, the powder charging holes are charged with powder according to a vibration reduction blasting parameter design list, the periphery holes are charged with the powder at intervals, the rest of the blastholes are continuously charged with the powder, the powder are charged to the bottoms of the holes, tamping is used for plugging the holes in place, and the empty holes are filled with plastic bags with mud; and the detonators are connected in place according to requirements, equipment and persons are all evacuated outside the safe distance, and detonation is carried out after the equipment and the persons are confirmed to be safe. The method has the advantages that the hole bottom blasting force can be enhanced, the blasting footage can be increased, particularly, reflection, refraction and absorption of the blasting shock waves can be strengthened, the process of shock wave->attenuating->stress wave->attenuating->seismic wave can be accelerated, the blasting vibration and noise can be greatly reduced, the blasting vibration speed is detected to be lees than 5cm/s, the phenomenon that people are disturbed can be greatly reduced, and the good technical economic effect can be obtained.

The invention discloses a comprehensive damping method mixed explosion of a hard rock tunnel closely attaching to an existing underground building. The method is characterized in that below the base plate of the existing structure of the existing building, an explosion working face is sequentially divided into a metal expansion explosion area, an emulsion explosive underholing area and an emulsion explosive explosion area towards the depth direction. By the method, explosion vibration speed during tunneling, attaching to the existing underground building, in a hard rock stratum can meet the requirements, the existing underground building is not damaged by explosion shock waves, and project progress is guaranteed.

The invention discloses a high-unloading slot composite-incision demolition blasting method for a reinforced concrete cooling tower, and relates to a demolition blasting method for the reinforced concrete cooling tower. The demolition blasting method comprises the following steps: pre-demolishing an internal sprinkling platform and an external ladder of the reinforced concrete cooling tower to be demolished by blasting; arranging a composite blasting incision including a rectangular herringbone pillar area, a trapezoidal ring beam area, an acute triangular directional window and a high unloading slot on the lower part of the tower body, wherein the high unloading slot and the directional window are mechanically arranged so as to ensure the construction precision; drilling at the herringbone pillar and a ring beam which is locally required to be loosened by blasting (a ring beam loosening area is constructed by a mechanical method and a blasting method), filling explosive, fencing, and strengthening blasting of a millisecond delay blasting network through non-electric bidirectional multi-point excitation. By the demolition blasting method, the falling direction can be accurately controlled, the number of boreholes and the amount of the explosive can be greatly reduced, the collapsing disintegration degree and the touchdown impact state of the tower body can be regulated and controlled, and the touchdown vibration can be effectively controlled.

The invention discloses a gun hole charging and plugging device which comprises a disc and a head rod detachably connected with the disc. The disc comprises a tray, fins and a center through hole. The fins are arranged in the mode of surrounding the outer wall of the tray and have elasticity and toughness, and the center through hole is formed in the center of the tray. The fins can be inserted into a gun hole, and the outer diameter of the fins is larger than that of the gun hole. The fins are provided with anti-skid structures capable of being clamped and fixed to the wall of the gun hole. The bottom of the tray is provided with a connection port in butt connection with the head rod. The problem that a cartridged explosive slides when being charged into an upward hole is effectively solved, the non-coupling charging structure is actually achieved, interval charging can be achieved, accordingly, the oversized fragment output rate is effectively reduced, blasting vibration is reduced, and safety and stability of sinking and driving engineering are maintained. In addition, the explosive consumed cost is reduced, the workload of workers is reduced, and the device plays a quite important role in developing enterprises, reducing the operation cost and improving productivity.

The invention relates to the technical field of blasting processes, in particular to a segmented blasting method and device for medium-depth holes. The method includes the steps of determining the range of an actual hole net area S, wherein S is equal to or greater than 0.7 S and equal to or smaller than 0.9 S; on the basis of the single-hole explosive payload and the maximum single-segment explosive payload of a blasthole, determining the segmented explosive loading segment number of segmented explosive loading and blasting, and according to the segmented explosive loading segment number, determining the length L1 of a first filling segment, the length h1 of a first layer explosive loading segment, the length Li of the ith filling segment under the first layer explosive loading segment and the length hi of the ith layer explosive loading segment during segmented explosive loading and blasting, wherein the first filling segment, the first layer explosive loading segment, the ith filling segment and the ith layer explosive loading segment are sequentially disposed at the position close to the earth surface from top to bottom; setting the blasthole explosive payload of a hole net andthe quantity of solid fillers for filling according to the parameters above and setting short-delay interval blasting time of every two adjacent blastholes in each horizontal segment among horizontalrows and the short-delay interval blasting time among horizontal holes; according to the calculation value of the short-delay interval blasting time of one blasthole segment in the vertical direction, setting the actual value of the short-delay interval blasting time of the blasthole segment in the vertical direction to be 1.2-1.3 times higher than the calculation value. Therefore, the blasting quality is improved.

The invention discloses a soft rock single-step deep hole slotting, vibration attenuation, bottom flattening and smooth blasting structure in a tunnel. Multiple blast holes are formed in the tunnel tobe blasted, and explosives are arranged in the multiple blast holes. The blast holes include peripheral holes, groove expanding holes, slotting holes, auxiliary holes and bottom plate holes. The groove expanding holes, the slotting holes, the auxiliary holes and the bottom plate holes are internally provided with explosives of continuous loaded structures. Explosives of spaced loading structuresare arranged in the peripheral holes, and the blast holes are blocked through stemming. According to the soft rock single-step deep hole slotting, vibration attenuation, bottom flattening and smooth blasting structure in the tunnel, due to the arrangement of the positions of the blast holes and due to the fact that the explosives of the different structures are arranged in the blast holes, the explosives are blocked in the blast holes through the stemming, the explosive blasting stress and detonation gas are blocked in the blast holes, the rock breaking time is prolonged, the blasting energy utilization rate is increased, the footage is increased, the blasting vibration is reduced, the self-stabilization capability of surrounding rock is improved, and the construction speed is greatly increased.

The invention relates to the field of blasting, and discloses an electronic detonator initiation system for tunnel blasting. The electronic detonator initiation system is used for reducing the generation probability of blind shots during tunnel blasting and managing the blind shots. The electronic detonator initiation system comprises a handheld terminal, a control center, an initiator, an encoderand an electronic detonator, wherein the handheld terminal communicates with the control center through a wireless network; bar codes corresponding to equipment IDs are arranged on the outer portionsof the encoder and the electronic detonator; the handheld terminal is provided with a camera for scanning the bar codes; if the initiation of the electronic detonator fails and the line of the electronic detonator is intact, the handheld terminal is used for scanning the bar code of the electronic detonator failing to initiate and the bar code of the corresponding encoder, acquiring the ID of theelectronic detonator failing to initiate and the ID of the encoder, and reporting the acquired IDs to the control center for blind shot management; and the blind shot management comprises secondary initiation authorization and destruction authorization, so that the blind shots are conveniently recycled or placed to run into the society. The electronic detonator initiation system is suitable for tunnel blasting.