7results about How to "Reduce chunk rate" patented technology

The application discloses a CO2 blasting intelligent control system and method based on digital twinning and edge computing, which deeply integrates wireless ad hoc network, radio frequency energy activation, edge computing collaborative decision and digital twinning modeling, realizes technical leap from preset triggering to intelligent closed loop, generates personalized parameters based on digital twinning model, combines edge computing real-time sensing and collaborative decision, reduces blasting vibration, improves ore crushing uniformity, reduces secondary crushing energy consumption, and improves blasting accuracy; radio frequency energy activation and electronic safety lock mechanism are adopted to realize zero live standby before detonation, eliminate early explosion risk caused by stray current and misoperation; the operator can complete all operations in a safe area one kilometer away, which essentially improves safety; through the wireless ad hoc network, the disconnection failure of wired connection is eliminated, intelligent collaborative detonation reduces the large block rate, the feedback optimization mechanism continuously reduces the unit consumption of explosives, and the comprehensive cost is reduced.

An improved process for mining a steeply inclined lens-shaped ore body by a staged chamber method comprises the following steps: step 1, determining the stage height according to the occurrence characteristics of the ore body, determining and constructing an off-vein transport lane; step 2, constructing a flat bottom mining project at the bottom of the ore block; step 3, constructing a stope cutting well, a pedestrian ventilation skylight and a segmented rock drilling lane; step 4, constructing a cutting groove; step 5, mining and rock drilling operations; each segment constructs a medium-deep hole upward through a drilling rig; step 6, mining and blasting operations; step 7, shoveling and transportation; step 8, recovery of ore stored in each stage; step 9, recovery of residual mining at the bottom of the ore body and ore stored in the upper part; step 10, subsequent filling according to design requirements; step 11, recovery of ore pillars according to preliminary design requirements. The present invention avoids complicated splitting and trenching operations, reduces safety risks, does not need to leave permanent ore pillars on both sides of the funnel and trench, and improves mining recovery rate; does not need to handle large funnel blocks, and increases safety.

This invention discloses a bench blasting method for reducing the proportion of large blocks in bedding rock mass in open-pit mines. An auxiliary blasting zone is arranged on the side of the normal blasting zone away from the bench slope of the rock mass. The width W2 of the auxiliary blasting zone is calculated using formula (1). At least one row of auxiliary blast holes is arranged within the auxiliary blasting zone, with the arrangement and spacing of the auxiliary blast holes following the normal blasting zone. The depth of each row of auxiliary blast holes is calculated using formula (2). This method utilizes auxiliary blast holes during bench blasting, effectively breaking up the rock mass in the auxiliary blasting zone. This solves the problem of large or even super-large blocks being generated by the rock mass sliding down along joint surfaces after the normal blasting of the rear rows of blast holes, effectively reducing the proportion of large blocks. The arrangement of auxiliary blast holes ensures a more uniform distribution of explosives within the rock mass to be blasted, resulting in more uniform rock mass size and a lower proportion of large blocks after blasting, which is beneficial for improving the efficiency of subsequent loading operations.

The utility model discloses a peripheral hole charging structure for energy-gathered water pressure smooth blasting, which belongs to the technical field of tunnel construction and comprises a cartridge case, and one end of the cartridge case is connected with a sealing cover. The device has the beneficial effects that by arranging the cartridge case, the stemming layer and the annular water bag, the sealing performance of the peripheral hole blast hole can be high, the sealing performance of the peripheral hole blast hole can be improved, the explosion energy loss during explosive explosion can be reduced, and the explosion effect of the device can be improved; according to the explosive cartridge, filler in the explosive cartridge can be extruded, the filler can be tightly attached, gaps between the explosive cartridge and the filler can be reduced, meanwhile, under the action of a first round water bag and a second round water bag, a water wedge effect can be generated during explosive explosion, further crushing of surrounding rock is facilitated, the boulder rate generated by explosion can be reduced, and the explosive cartridge can be conveniently exploded. And the dust concentration after blasting can also be reduced, and pollution to the environment after blasting is reduced.

The invention discloses a step blasting method for reducing blasting boulder rate through depth-depth coupling, which comprises the following steps of: designing a deep hole blasting scheme and constructing according to field conditions, determining a non-tensile stress area range between deep hole cartridges by utilizing theoretical calculation, and accurately calculating and optimizing short hole layout positions through a trigonometric function, so as to reduce blasting boulder rate. After construction is completed, explosive charging and blast hole blocking are carried out according to the design, and the mode of hole-by-hole row-by-row short hole millisecond detonation is adopted, so that the more efficient blasting effect is achieved. Through the deep and shallow hole coupling blasting technology, stress wave distribution in the blasting process is optimized by utilizing the characteristics of a non-tensile stress area, excessive breaking of rocks and generation of large rocks are reduced, blasting energy distribution is more uniform through deep and shallow hole combined blasting, and the blasting efficiency is improved. The problem that the explosion energy distribution along the axis of the deep hole is not uniform due to the fact that the explosion charge is mainly located at the middle bottom of the deep hole due to the long blocking section of the deep hole is solved.

The invention discloses an underground upward blasthole plug, comprising a plugging head, a lead hole is arranged on the plugging head, a plurality of elastic blades are arranged in the circumferential direction, and the elastic blades include a middle part, a first connecting part and a second connecting part; the thickness of the first connecting part is less than the thickness of the middle part, and is arranged near the bottom surface of the middle part; the thickness of the second connecting part is less than the thickness of the middle part, and is arranged near the top surface of the middle part; the first connecting part of an adjacent elastic blade and the second connecting part of another elastic blade are arranged oppositely; one end of the elastic blade away from the plugging head is inclined relative to the plugging head, and the height of the side where the second connecting part is connected to the middle part is less than the height of the other side; among two adjacent elastic blades, the first connecting part of one elastic blade and the second connecting part of the other elastic blade can overlap by extrusion. The plugging device can effectively prevent the plugging device from moving and prolong the reaction time of the explosive gas.

The present invention belongs to the technical field of blasting for underground mining, and discloses a method and system for blasting operations for underground mining of different mineral rocks. The method determines the blastability classification of different mineral rocks for different mineral rocks; determines the single-consumption blasting parameter index of different mineral rocks during different blasting operations; determines the parameter index related to the blasting construction process in slot blasting, smooth blasting, and medium-deep hole blasting, and provides data for mine blasting construction. The present invention can greatly improve the safety of well formation operations; the optimized design of the pillar recovery process can achieve efficient recovery of retained pillars, reduce the disturbance of blasting construction to the roof and other protection areas, and improve the recovery efficiency of the goaf area by designing the order of pillar recovery, realize the maximum utilization of resources, and improve economic benefits.