One-time-formed smooth blasting method for laneway

A smooth blasting and roadway technology, which is applied in blasting and other directions, can solve the problems of lower labor productivity and construction progress, the inability to guarantee the quality of smooth blasting, and complicated procedures, so as to reduce the amount of secondary repairs and improve safety and stability. , weaken the effect of mutual clamping effect

Active Publication Date: 2015-05-13
招金矿业股份有限公司夏甸金矿 +1
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Problems solved by technology

[0002] In the development and excavation process of metal mines, the quality of smooth blasting cannot be guaranteed by one-time excavation of full-section. Although smooth blasting can be realized by secondary molding, labor productivity and construction progress are greatly reduced. Due

Method used

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  • One-time-formed smooth blasting method for laneway
  • One-time-formed smooth blasting method for laneway

Examples

Experimental program
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Embodiment 1

[0020] In this embodiment, the excavated rock section is 4.5m wide and 3.6m high, and the depth of each blast hole is controlled to be 2.5m.

[0021] A roadway forming smooth blasting method, firstly excavate the rock formation, and then carry out the following steps:

[0022] (1) Layout setting of blast holes: determine the center cut hole A1 on the rock formation, set the first layer of cut holes on the periphery of A1, set the second layer of cut holes around the first layer of cut holes, and set the second layer of cut holes on the periphery of the second layer of cut holes Set the third layer of cutouts around the groove; set the first layer of caving holes around the third layer of cutouts, set the second layer of caving holes outside the first layer of caving holes, and set the third layer of Layer avalanche eyes, set the fourth layer avalanche eyes on the periphery of the third layer avalanche eyes; set a layer of peripheral eyes on the periphery of the fourth layer av...

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Abstract

The invention belongs to the technical field of laneway blasting, and particularly relates to a one-time-formed smooth blasting method for a laneway. The method comprises the steps of firstly tunneling into the rock stratum, then laying out breaking-in holes, brukup boreholes and periphery holes, and detonating in sequence after powder charging. According to the method, the rhombic and square combined arrangement mode is adopted, the mutual clamping action among rocks during blasting of all sections can be weakened effectively, regular underholes can be formed, and larger compensation space is provided for subsequent large-scale breaking. According to the method, drill bits of different specifications do not need to be prepared for rock drilling, the underholing process and the blasting network design are advanced, the clamping action among the periphery holes during blasting is lowered, and smooth blasting is achieved; no root is left on the bottom edge of the laneway, the secondary repair amount of the laneway is reduced, the safety and the stability of the laneway are improved greatly, the laneway is formed at a time, labor productivity is improved, and construction progress and construction quality are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of roadway blasting, in particular to a roadway forming smooth surface blasting method. Background technique [0002] In the development and excavation process of metal mines, the quality of smooth blasting cannot be guaranteed by one-time excavation of full-section. Although smooth blasting can be realized by secondary molding, labor productivity and construction progress are greatly reduced. During rock drilling, it is necessary to replace different types of drill bits for cutting holes, and the process is complicated. Therefore, the one-time forming smooth blasting technology of the roadway has become a bottleneck restricting the synchronization of mine construction quality and construction progress. Contents of the invention [0003] The present invention aims at the deficiencies in the above-mentioned prior art, and provides a roadway forming smooth surface blasting method. [0004] The technical sch...

Claims

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Application Information

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IPC IPC(8): F42D1/00
Inventor 贾汉义王金波王祯周东良赵经刚姜钊林张家华秦秀合
Owner 招金矿业股份有限公司夏甸金矿
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