CN111841834A

CN111841834A - Blasting mining method

Info

Publication number: CN111841834A
Application number: CN202010665675.3A
Authority: CN
Inventors: 侯文雷; 刘吉安; 王邦民
Original assignee: Jinan Luping Building Materials Co ltd
Current assignee: Jinan Luping Building Materials Co ltd
Priority date: 2020-07-11
Filing date: 2020-07-11
Publication date: 2020-10-30

Abstract

The application relates to a blasting mining method, which comprises the following steps: s1: blasting, namely blasting the mountain body in the quarrying area by using explosives; s2: primary crushing, further crushing the crushed stone generated by blasting; s3: carrying out composite crushing, namely conveying the crushed stone into a crusher for crushing again, and reducing the mass and volume of a single crushed stone; s4: and screening, namely screening the crushed stone subjected to composite crushing into four crushed stones with different volumes, and then storing the screened crushed stone into four bins according to the volume. This application has the convenient effect of transportation.

Description

Blasting mining method

Technical Field

The application relates to the field of quarrying technology, in particular to a blasting mining method.

Background

The stone belongs to a sand permeable material from the perspective of water permeability. The bridge building in the road and stone production line is affected by the complicated force system of vehicle load and various complicated natural factors, so that the material for building and bridging has certain mechanical performance and durability without obvious strength reduction under the action of the complicated natural factors. At present, part of stone raw materials of the method are from mountain mining.

The mining mode commonly used at present is blasting mining, through pre-buried explosive, then explode the massif, then collect the transportation to the rubble that produces after exploding.

In view of the above-mentioned related technologies, the inventor believes that the defect of inconvenient transportation caused by different sizes of crushed stones after blasting exists.

Disclosure of Invention

In order to solve the problem that the crushed stones are different in size after blasting and therefore inconvenient to transport, the application provides a blasting mining method.

The blasting mining method provided by the application adopts the following technical scheme:

a method of blast mining comprising the steps of:

s1: blasting, namely blasting the mountain body in the quarrying area by using explosives;

s2: primary crushing, further crushing the crushed stone generated by blasting;

s3: carrying out composite crushing, namely conveying the crushed stone into a crusher for crushing again, and reducing the mass and volume of a single crushed stone;

s4: and screening, namely screening the crushed stone subjected to composite crushing into four crushed stones with different volumes, and then storing the screened crushed stone into four bins according to the volume.

Through adopting above-mentioned technical scheme, carry out the primary crushing to the rubble earlier at the exploitation scene, reduce the volume of the bold rubble that produces the rubble after the blasting, from the loading and the transportation of being convenient for.

Preferably, at S2, the crushed stone is primarily crushed using a hydraulic crushing hammer and a bucket car, and then the bucket car loads the crushed stone onto the transport vehicle.

Through adopting above-mentioned technical scheme, carry out the breakage to the bold rubble through hydraulic breaking hammer, then utilize the dipper to load the rubble, the dipper not only can assist broken building stones also is the leading tool of loading, has promoted crushing efficiency and loading efficiency.

Preferably, in S2, the crushed stone after the primary crushing is loaded on a transport vehicle by using a loading vehicle.

Through adopting above-mentioned technical scheme, tiny and dispersed rubble can utilize the commentaries on classics to carry out the loading, has further promoted loading efficiency.

Preferably, the transport vehicle transports the primarily crushed material to the crushing bin for storage in S2, and transports the crushed stone in the crushing bin to the crusher for crushing in S3.

Through adopting above-mentioned technical scheme, because once only carry a large amount of rubbles after the blasting was gathered, and the feeding mode that needs the screening of rubbles is lasting and a small amount, utilizes the feed bin to carry out short-term storage to the rubbles, balances the difference between S2 output and the S3 input volume.

Preferably, the crushed stone is crushed twice in S3, the material is crushed by a jaw crusher, and then the crushed stone is conveyed to a hammer crusher for further crushing.

Through adopting above-mentioned technical scheme, through twice breakage, progressively broken stone becomes more tiny rubble with the rubble.

Preferably, the screening device in S4 is a vibrating screen, the screen mesh of the vibrating screen sequentially includes a first screening area, a second screening area and a third screening area from the feed inlet to the discharge outlet, the mesh number of the first screening area, the mesh number of the second screening area and the mesh number of the third screening area are sequentially reduced, a storage bin with an upper end opening is arranged below each screening area, and the discharge outlet of the vibrating screen is also communicated with one storage bin.

Through adopting above-mentioned technical scheme, once sieve and accomplish the screening of four kinds of different particle size building stones, promoted screening efficiency.

Preferably, the lower end of the storage bin in the S4 is fixedly connected with a support frame, the lower end of the storage bin is provided with a discharge port, the lower end of the storage bin is hinged with a bottom cover for opening and closing the discharge port, the storage bin is hinged with an air cylinder for opening and closing the bottom cover, and the height of the discharge port is greater than that of the transport vehicle.

Through adopting above-mentioned technical scheme, the discharge gate lower extreme can be removed to the transport vechicle, thereby removes the bottom through the cylinder and opens the discharge gate, and the rubble dumps to the transport vechicle on, promotes loading efficiency.

Preferably, the upper end of the storage bin is fixedly connected with a guide sleeve, the lower end of the guide sleeve is fixedly connected with an opening at the upper end of the storage bin, and the upper end of the guide sleeve is fixedly connected with the bottom of the screen.

Through adopting above-mentioned technical scheme, utilize the uide bushing to lead to the material that passes to be the sieve, avoid passing the rubble of screen cloth and get into in the adjacent storage silo.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the hydraulic breaking hammer is used for breaking large broken stones, and then the broken stones are loaded by the bucket truck, so that the bucket truck not only can assist in breaking stones but also is a main tool for loading, and the breaking efficiency and the loading efficiency are improved;

2. in the composite crushing, a jaw crusher is used for crushing materials, then stones crushed by the jaw crusher are conveyed to a hammer crusher for further crushing, and crushed stones are crushed by two times to be crushed into finer crushed stones;

3. the screen cloth includes first, second, third and fourth screening region from feed inlet to discharge gate in proper order, the mesh number in first, second, third and fourth screening region reduces in proper order, and every department screening region below all is provided with an upper end opening storage silo, and the screening of four kinds of different particle size building stones is accomplished in once screening, has promoted screening efficiency.

Drawings

FIG. 1 is a schematic flow chart of an embodiment of the present application;

Fig. 2 is a schematic structural view of a vibrating screen according to an embodiment of the present application.

Reference numeral 100, a vibrating screen; 101. a frame; 102. a spring plate; 103. screening a screen; 104. a vibration motor; 105. a first screening area; 106. a second screening area; 107. a third screening area; 108. a storage bin; 109. a guide sleeve; 110. a support frame; 111. a bottom cover; 112. and a cylinder.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a blasting mining method.

Referring to fig. 1, a blast mining method includes the steps of:

s1: and blasting, namely selecting points for placing explosives on the mountain, wherein the distance between the selected points is kept consistent. Then, hole turning is carried out at the selected point, and then the explosives are pre-buried. Blasting the mountain body in the quarrying area by detonating the explosive.

S2: the blasting area is firstly sprayed after primary crushing, dust in the air is quickly removed, and the subsequent operation is facilitated. Then crushing the large crushed stones by a hydraulic crushing hammer, and loading the crushed stones onto a transport vehicle by using a bucket truck. The forklift can assist in crushing stone materials and is a main tool for loading, and crushing efficiency and loading efficiency are improved. Tiny and dispersed broken stones generated by blasting and primary crushing can be loaded by using a transfer car.

S3: and (4) carrying out composite crushing, namely transporting the crushed stones to a factory area by a transport vehicle for crushing, and inclining the crushed stones to a crushing bin. The crushing bin sinks below the ground, and the upper end of the crushing bin is provided with an opening. The carrier vehicle dumps the rubble to broken feed bin in from the upper end, the discharge gate of broken feed bin and the feed inlet intercommunication of breaker. Since the subsequent crushing allows a continuous working step of the crushed stone, while the transport is intermittent, the time difference between crushing and transport can be balanced by means of the crushing silo. The crushing bin is opened and closed periodically to supplement crushed stones for the crusher, so that the conditions of idling and overload operation of the crusher are reduced.

The crushers are two and are respectively a jaw crusher and a hammer crusher. The feed inlet of the jaw crusher is communicated with the discharge outlet of the crushing bin. The feed inlet of hammer crusher communicates with jaw crusher's discharge gate, utilizes jaw crusher to carry out the breakage to the material earlier, then carries the building stones that jaw crusher broken to carry out further breakage in hammer crusher, through twice breakage, progressively breaks the rubble, breaks into more tiny rubble.

S4: and (4) screening, namely screening the crushed stone after the composite crushing by using a screening device. And conveying the crushed stone of the hammer crusher into a screening device through a conveying belt.

Referring to fig. 2, the screening device is a vibrating screen 100, which comprises a frame 101, the frame 101 being fixedly connected with a screen 103 by means of a spring plate 102. The spring plate 102 is arranged obliquely, and the spring plate 102 is inclined downwards along the conveying direction of the crushed stone. The screen 103 is disposed horizontally. One end of the screen 103 is fixedly connected with a vibration motor 104. The screen 103 comprises, in order from the inlet to the outlet, a first screening area 105, a second screening area 106 and a third screening area 107. The mesh sizes of the first screening area 105, the second screening area 106 and the third screening area 107 are reduced in sequence, and a storage bin 108 with an upper end opening is communicated below each screening area. The lower end of the discharge hole of the vibrating screen 100 is also communicated with a storage bin 108 with an upper end opening, so that the total number of the storage bins 108 is four. The screening of four kinds of different particle size building stones is accomplished in once screening, has promoted screening efficiency.

The upper ends of the storage bins 108 located below the first screening area 105, the second screening area 106 and the third screening area 107 are fixedly connected with flexible guide sleeves 109, which are made of polyester fabric in this embodiment. The lower end of the guide sleeve 109 is fixedly connected with the upper end opening of the storage bin 108, and the upper end thereof is fixedly connected with the bottom of the screen 103.

The lower extreme fixedly connected with support frame 110 of storage silo 108, the discharge gate has been seted up to storage silo 108 lower extreme, and storage silo 108 lower extreme articulates there is the bottom 111 of opening and close the discharge gate, and storage silo 108 articulates there is drive bottom 111 pivoted cylinder 112, and the height of discharge gate is greater than the height of transport vechicle. The transport vechicle can remove the discharge gate lower extreme, thereby removes bottom 111 through cylinder 112 and opens the discharge gate, and the rubble dumps to the transport vechicle on, promotes loading efficiency.

The implementation principle of the blasting mining method in the embodiment of the application is as follows: carry out the breakage to the bold rubble through hydraulic breaking hammer, then utilize the dipper to load the rubble, the dipper not only can assist broken building stones also is the leading tool of loading, has promoted crushing efficiency and loading efficiency.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A blasting mining method is characterized in that: the method comprises the following steps:

s2: primary crushing, further crushing the crushed stone generated by blasting;

2. The blast mining method of claim 1, wherein: in S2, the crushed stone is primarily crushed by the hydraulic crushing hammer and the bucket car, and then the bucket car loads the crushed stone onto the transport vehicle.

3. The blast mining method of claim 2, wherein: at S2, the crushed stone after the primary crushing is loaded on a carrier vehicle by a loading vehicle.

4. The blast mining method of claim 3, wherein: and in S2, the transport vehicle conveys the primarily crushed materials to a crushing bin for storage, and in S3, the crushed stones in the crushing bin are conveyed to a crusher for crushing.

5. The blast mining method of claim 4, wherein: and (6) crushing the crushed stone twice in S3, crushing the material by using a jaw crusher, and then conveying the stone crushed by the jaw crusher into a hammer crusher for further crushing.

6. The blast mining method of claim 5, wherein: the screening device in the S4 is a vibrating screen (100), a screen (103) of the vibrating screen sequentially comprises a first screening area, a second screening area and a third screening area (105, 106 and 107) from a feeding hole to a discharging hole, the mesh number of the first screening area, the mesh number of the second screening area and the mesh number of the third screening area (105, 106 and 107) are sequentially reduced, a storage bin (108) with an upper end opening is arranged below each screening area, and the discharging hole of the vibrating screen (100) is also communicated with the storage bin (108).

7. The blast mining method of claim 6, wherein: the lower end of the storage bin (108) in the S4 is fixedly connected with a support frame (110), the lower end of the storage bin (108) is provided with a discharge hole, the lower end of the storage bin (108) is hinged with a bottom cover (111) for opening and closing the discharge hole, the storage bin (108) is hinged with an air cylinder (112) for opening and closing the bottom cover (111), and the height of the discharge hole is greater than that of the transport vehicle.

8. The blast mining method of claim 7, wherein: the upper end of the storage bin (108) is fixedly connected with a guide sleeve (109), the lower end of the guide sleeve (109) is fixedly connected with an opening in the upper end of the storage bin (108), and the upper end of the guide sleeve is fixedly connected with the bottom of the screen (103).