101results about How to "Improve blasting quality" patented technology

The invention discloses a long tunnel fast construction process. The tunnel construction method in the direction from the entrance to the exit and the tunnel construction method in the direction from the exit to the entrance are the same and each construction section is respectively constructed from back to front. The construction process is as follows: 1, excavating construction at an initial construction section, the process is as follows: performing advance geology forecast, determining the excavating construction method for the current construction section, excavating and primary supporting; 2, excavating construction at the next construction section; 3, repeating the step 2 for multiple times until the construction tunnel is through, wherein in the tunnel construction process, found water seepage areas are timely subjected to draining treatment, and the secondary lining construction is synchronously performed on the tunnel holes formed by excavating from front to back. The long tunnel fast construction method is reasonable in design, simple and convenient in construction, safe in the construction process, short in construction process and fast in construction progress, thus effectively solving the defects and shortcomings such as large equipment investment, long construction period and slow construction progress of the existing long tunnel construction.

The invention relates to the field of shaped-charge water-pressure smooth blasting, in particular to a coalmine rock roadway excavation shaped-charge water-pressure smooth blasting structure and method. The coalmine rock roadway excavation shaped-charge water-pressure smooth blasting structure is characterized in that rock breaking holes are formed in the center line of a section of a rock roadway; cutting holes are symmetrically formed in two sides of the rock breaking holes; secondary cutting holes are formed in one side of the cutting holes; tertiary cutting holes are formed in one side ofthe secondary cutting holes; auxiliary holes are formed in one side of the tertiary cutting holes; peripheral holes are formed in the outer sides of the auxiliary holes; and bottom holes are formed inthe bottoms of the peripheral holes. The invention further provides the coalmine rock roadway excavation shaped-charge water-pressure smooth blasting method. Through the coalmine rock roadway excavation shaped-charge water-pressure smooth blasting structure and method provided by the invention, the big rock occurrence ratio can at least be obviously reduced; the coalmine rock roadway excavation speed can be improved by adoption of shaped-charge water-pressure blasting; and meanwhile, the explosive energy utilization ratio can be improved, the smooth blasting quality can be improved, and underground blasting dust can be efficiently reduced.

The invention provides a high-accuracy global system positioning (GPS) geared drill automatic hole arrangement system and belongs to the technical field of open-cast mining digitization drilling and blasting. The high-accuracy GPS geared drill automatic hole arrangement system comprises an intelligent terminal, a double-frequency GPS module, a GPS differential station, a computer network and a terminal computer of a scheduling control center, a GPS differential station, intelligent terminal host computer software and scheduling control center software. The high-accuracy GPS geared drill automatic hole arrangement system has the advantages of eliminating various factors which are hidden and uncontrollable and influence drilling and blasting quality in traditional drilling and blasting process, high and new technology available now is used to improve traditional process, and therefore refine course management and digital control course are achieved.

The invention discloses a sand blasting machine, which comprises a sand blasting chamber. The sand blasting chamber comprises a feeding hole for feeding and discharging workpieces, and spray nozzles arranged in the sand blasting chamber; the spray nozzles are fixed on a spray nozzle drive mechanism; a feeding mechanism capable of driving the workpieces to feed and discharge is matched on the feeding hole; the spray nozzle drive mechanism comprises at least one swinging mechanism arranged in the sand blasting chamber; each swinging mechanism is provided with one spray nozzle and is driven by a first drive part to swing to the left and right; the feeding mechanism comprises a placement platform used for placing workpieces and a second drive part; and the placement platform comprises at least one positioning table used for placing the workpieces, and a sealing plate arranged behind the positioning table and matched with the feeding hole of the sand blasting chamber. A plurality of swinging mechanisms are arranged in the sand blasting chamber, and a plurality of spray nozzles can swing to blast sand on the workpieces when being used for blasting sand, so that a uniform and efficient sand blasting effect is realized; and in addition, the workpieces can be quickly fed and discharged in the sand blasting chamber through the feeding mechanism, so that the sand blasting efficiency of the workpieces is further improved.

The invention relates to a slope expansion and blasting method for mining a deep concave open-pit mine by stages. The method comprises the following steps: sequentially performing hole distribution design of deep holes, perforation construction, setting of primer detonators in the deep holes and the construction of charging explosive in the deep holes, performing time delay detonation design of the detonators in a surface network, connecting the detonators in blast holes with the detonators in the surface network, and detonating, and the method is characterized in that, under the condition that the width of the slope expansion part is greater than 20 meters, the hole distribution design of the deep holes is used for designing the blast holes in a control row of a blasting area to be vertical to a bench crest of a main stope, the time delay detonation design of the detonators in the surface network is used for designing the detonation sequence to hole-by-hole differential detonation, and the time delay detonation design of the detonators in the surface network is used for designing delay time of the detonators to enable the inter-hole detonator time delay to be shorter than the inter-row detonator time delay. Under the condition that the width of the slope expansion part is smaller than 20 meters, the hole distribution design of the deep holes is used for designing the blast holes in the control row of the blasting area to be parallel to the bench crest of the main stope, and the time delay design of the detonator is used for designing the delay time of the detonators to enable the inter-hole detonator time delay to be longer than the inter-row detonator time delay. The method is strong in operability, safe, practical and reliable.

The invention relates to a blasting method for a bridge cylindrical pile base with the pile base diameter of 1.7-1.9 m. The blasting method includes the steps of drilling holes, loading explosive materials, blocking a cannon opening and triggering blasting. According to a hole drilling method, a central hole is vertically formed along a central line of the cylindrical pile base, a cannon opening inner ring with a radius of 0.13-0.17 m is formed with the central line of the cylindrical pile base as the center, a cannon opening middle ring with a radius of 0.43-0.47 m is formed, a cannon openingouter ring with a radius of 0.78-0.82 m is formed, and 4 vertically formed cutting holes are evenly distributed in the cannon opening inner ring, 6 vertically formed auxiliary holes are evenly distributed in the cannon opening middle ring, and 14 obliquely formed peripherical holes are evenly distributed in the cannon opening outer ring; the included angle between the central axis of each peripherical hole and the vertical direction is arccot10-arccot12, and the distance between the top of each peripherical hole and the central hole is smaller than that between the bottom of each periphericalhole and the central hole. The blasting quality is high, the construction efficiency is high, and the blasting cost is low.

The invention proposes a sand blasting device for motor train unit air compressor crankcase casting mold machining. The sand blasting device comprises a sand blasting box, an object carrying plate for placing workpieces, a first sand blasting module, a second sand blasting module, a third sand blasting module, a first inductor, a second inductor, a third inductor and a controller; a separation plate is horizontally arranged in the sand blasting box; a conveying roller set for conveying the object carrying plate is arranged between a feed end and a discharge end of the separation plate; the first inductor is used for monitoring the in-place condition of the object carrying plate and sending monitored signals to the controller; the second inductor is used for detecting the in-place condition of the object carrying plate and sending monitored signals to the controller; the third inductor is used for detecting the in-place condition of the object carrying plate and sending monitored signals to the controller; and the first sand blasting module, the second sand blasting module and the third sand blasting module are mounted at the top end of the sand blasting box in sequence. The sand blasting device is universal in sand blasting and high in sand blasting quality, and improves the sand blasting efficiency of a motor train unit air compressor crankcase casting mold.

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 rectangular tunnel full-section blasting excavation construction method. The rectangular tunnel full-section blasting excavation construction method comprises the following steps that drilling and blasting are designed through the smooth blasting principle; cut holes, auxiliary holes, smooth blasting holes and encryption smooth blasting holes are sequentially formed from inside to outside and are blasted one by one according to the smooth blasting requirements; and a standard designed rectangular section is formed finally. The rectangular tunnel full-section blasting excavation construction method is applied to construction, except that a rectangular-section tunnel is constructed according to the smooth blasting requirements, gap narrowing measures are taken for the blast holes in the corners, and thus the smooth blasting effect is improved; and on-site quality inspection shows that the formed section size of the rectangular tunnel meets the design requirement, and the rock surface flatness is smaller than the deviation value required by the specification.

The invention discloses a hydraulic blasting construction method for a joint fissure development rock mass tunnel, and relates to the technical field of tunnel blasting engineering. The hydraulic blasting construction method is characterized by comprising the following steps that 1) a blast hole is drilled; 2) the inner wall of the blast hole is washed by adopting specially-made slurry; 3) the energy gathering pipe is filled with explosives at intervals; 4) the energy gathering pipe is installed in the blast hole, the blast hole is plugged by adopting special stemming, and a water injection pipe is reserved; 5) water is injected, the blast hole is filled with the water by using the water injection pipe; and 6) the hole is sealed by adopting the plugging stemming, and an explosion propagation wire is connected for detonation. For a joint fissure development rock mass, joint fractures on the inner wall of the blast hole can be blocked, water injected into the blast hole is prevented from being lost in a blasting preparation stage, coupled medium water evenly transfers explosion energy to be acted on rock, the coupling effect of explosives and the water is improved, the blast hole utilization rate and the blasting efficiency are improved, the explosive use amount is reduced, the dust concentration of an operation site after blasting can be reduced, the operation site environmentis improved, meanwhile, the construction efficiency is high, and the cost is low.

The invention discloses a 24m high step slope expansion blasting method for an open pit mine. On a basis of considering advantages and disadvantages of a rotary drill and a down-the-hole drill fully,a way of combination operation of the rotary drill, the pore diameter of which is 310 mm, and the down-the-hole drill, the pore diameter of which is 165 mm, is adopted for hole arrangement. The methodcomprises a specific measure of adding 3-4 165 mm inclined holes parallel to a step slope between two front row 310 mm vertical holes. The method reduces a front row resistance line of high step blasting effectively and guarantees the perforating efficiency of the drills to the maximum extent, so that blasting economy is rationalized.

The invention discloses a loose blasting excavation construction method of an intermediary weathered sandstone stratum rock, and relates to the technical field of rock blasting construction methods. The loose blasting excavation construction method of the intermediary weathered sandstone stratum rock comprises the following steps that (1) a drilling machine working field is leveled; (2) hole distribution and medicine loading are conducted; (3) network connection is conducted; (4) safety alert is blasted; and (5) blast firing blasting is conducted. In the step (2), blast hole distribution technical parameters on districts with the digging depth less than 5 meters and districts with the digging depth great than 5 meters are accurately calculated, thus the blasting parameters are strictly controlled, the technical parameters comprise a blast hole inclined angle, a blast hole diameter, a step height, blast hole depth, the minimum resistance line, over-drilling depth of blast hole bottom, ablocking length, blast hole distance, blast array pitch, the medicine loading amount of each blast hole. The loose blasting excavation construction method of the intermediary weathered sandstone stratum rock has the advantages that blasting power control is precise and accurate, the blasting quality is high, and stability of a roadbed slope and safety of houses and personnel nearby can be ensured.

The invention relates to a blasting method for a bridge cylindrical pile foundation with a pile foundation diameter of 1.1-1.3m. The blasting method comprises the steps of drilling, filling explosives, blocking a blast hole and detonating, wherein the drilling step comprises the following steps of: vertically forming a central bull hole along a central line of the cylindrical pile foundation, forming a blast hole inner ring with a radius of 0.13-0.17m by taking the central line of the cylindrical pile foundation as a center, forming a blast hole outer ring with a radius of 0.48-0.52m by takingthe center line of the cylindrical pile foundation as the center, uniformly distributing four slotting holes which are vertically distributed in the blast hole inner ring, and uniformly distributing10 peripheral holes which are formed in an inclined mode in the blast hole outer ring, wherein included angles between the center axes of the peripheral holes and the vertical direction are arccot10-arccot12, and distances from the hole tops of the peripheral holes to the hollow bull hole are smaller than those from the hole bottoms of the peripheral holes to the hollow bull hole. The blasting method is high in blasting quality, is high in construction efficiency, is low in blasting cost, further can alleviate damages, on a pile hole protective wall, of blasting vibrations and flying rocks, and prevents the flying rocks from damaging construction equipment.

The invention discloses a crab-claw type filling device for filling slag into mine blast holes. The crab-claw type filling device is characterized in that a scraping plate device is arranged at the front part of a driving vehicle; a blast-hole-filling auxiliary protecting device is arranged in the slag-filled blast holes; the scraping plate device consists of a support fixed at the front of the driving vehicle and a double-arm crab-claw type scraping plate hinged with the middle part of the support and connected with a hydraulic driving system; the double-arm crab-claw type scraping plate is formed by hinging two symmetrical crab-claw scraping plates; crushing jaws are arranged at the front parts of the crab-claw scraping plates; a forehead opening of each crushing jaw is provided with a group of meshing teeth III; the middle and the tail of each crab-claw scraping plate are respectively provided with a semicircular hopper surface I and a semicircular hopper II with different diameters; and the semicircular hopper surface I and the semicircular hopper surface II are respectively provided with a group of meshing teeth I and a group of meshing teeth II. The crab-claw type filling device disclosed by the invention has the advantages that higher efficiency and higher quality for the filling work of the blast holes are achieved, the safety, reliability and the blasting quality of the mine blasting are effectively improved and the labor intensity of workers is reduced.

The invention relates to a blasting method for a bridge cylindrical pile foundation with the diameter being 0.8-1 m. The blasting method includes the steps of hole drilling, explosive material charging, blast hole opening blocking and detonating. According to the step of hole drilling, a central empty hole is vertically formed along the central line of the cylindrical pile foundation, a blast holeinner circle is formed with the central line of the cylindrical pile foundation as the center and with the radius of 0.13-0.17 m, a blast hole outer circle is formed with the central line of the cylindrical pile foundation as the center and with the radius of 0.33-0.37 m, four vertical grooving holes are evenly distributed in the blast hole inner circle, and nine inclined peripheral holes are evenly distributed in the blast hole outer circle. The included angle between the central axis of the peripheral holes and the vertical direction is arccot 10-arccot 12, and the distance from the tops ofthe peripheral holes to the central empty hole is smaller than the distance from the bottoms of the peripheral holes to the central empty hole. According to the blasting method for the bridge cylindrical pile foundation with the diameter being 0.8-1 m, blasting quality is high, construction efficiency is high, blasting cost is low, damage of blasting shock and flying stones to a pile hole protective wall can be reduced,, and flying stones are prevented from damaging construction equipment.