Single-fracture-face instant spalling device oriented roof cutting method

Abstract

The invention provides a single-fracture-face instant spalling device oriented roof cutting method, and relates to the technical field of mining. Each spalling device is of a tubular structure and isprovided with a plurality of energy gathering holes in the axial direction of the spalling device, wherein the energy gathering holes are arranged side by side. The method comprises the steps that according to the preset angle, a plurality of installing holes arranged side by side in the preset direction are formed in a to-be-split body; at least one spalling device is arranged in each installinghole, the energy gathering holes are arranged towards the to-be-split face of the to-be-split body, and the spalling devices in the installing holes are connected through leads; the spalling devices are triggered through electrification, and accordingly spalling agents in the spalling devices are expanded; and the joint cutting rate of various installing holes is detected and calculated, and roofcutting is finished when the joint cutting rate is in the preset range. According to the oriented roof cutting method, the rock breaking speed can be increased, and the mining safety is improved.

Description

technical field

[0001] The present disclosure relates to the technical field of mining, in particular, to a method for directional top-cutting of a single-crack surface instantaneous expander. Background technique

[0002] With the rapid development of the economy, people's demand for mineral resources is increasing, and the safe and stable mining of coal resources is particularly important.

[0003] When coal is mined in self-forming lanes without coal pillars, roof pre-splitting is the core technology of coal mining in this process, that is, a crack surface needs to be directional cut in the roof rock mass. The existing technology center mainly adopts explosive energy-concentrated blasting technology and static breaking agent directional top-cutting technology, but the explosive blasting of explosive explosive-energy-concentrated blasting technology is more dangerous and the approval procedures are complicated; the static breaking agent directional top-cutting technology i...

Examples

Embodiment Construction

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0042] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, for example, according to the description in the accompanying drawings directions for the example described above. It will be appreciated that if the illustrated device is turned over so...

technical field

[0001] The present disclosure relates to the technical field of mining, in particular, to a method for directional top-cutting of a single-crack surface instantaneous expander. Background technique

[0002] With the rapid development of the economy, people's demand for mineral resources is increasing, and the safe and stable mining of coal resources is particularly important.

[0003] When coal is mined in self-forming lanes without coal pillars, roof pre-splitting is the core technology of coal mining in this process, that is, a crack surface needs to be directional cut in the roof rock mass. The existing technology center mainly adopts explosive energy-concentrated blasting technology and static breaking agent directional top-cutting technology, but the explosive blasting of explosive explosive-energy-concentrated blasting technology is more dangerous and the approval procedures are complicated; the static breaking agent directional top-cutting technology i...

Examples

Embodiment Construction

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0042] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, for example, according to the description in the accompanying drawings directions for the example described above. It will be appreciated that if the illustrated device is turned over so...

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