Method for accurately processing goaf through chamber and deep hole blasting
A technology of deep hole blasting and goaf, which is applied in blasting, ground mining, mining equipment, etc. It can solve problems such as difficult site application, flaws, and complexity, and achieve safe and efficient mining and avoid rock movement damage.
Pending Publication Date: 2022-04-22
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology
[0004] However, in this patent, how to determine the precise blasting volume and filling height is not disclosed, so it is difficult to determine the construction parameters in practice, and there are still flaws
There is a method to obtain construction parameters by means of numerical simulation, but it is too complicated to be applied on site
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[0025] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.
[0026] Such as figure 1 , figure 2 and image 3 As shown in the patent CN102589372A, the horizontal construction roadway 2 is excavated in the hanging wall corresponding to the uppermost middle section of the goaf 6, and the deep hole 1 is excavated in the horizontal construction roadway 2, along the direction of the ore body, after the mining pillar is extracted. Two rows of deep holes 1 in the middle of 6 are used for blasting or reaming 1 deep hole to form a small blasting chamber 5, and in the middle of the goaf 6, two rows of deep holes 1 and the small blasting chamber 5 Simultaneously, the blasting free surface is formed by deep hole and chamber blasting, and then deep hole blasting is carried out along the two ends of the goaf 6 along the free surface, and the waste rock produced by blasting and excavating the horizontal construction r...
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The invention provides a method for accurately processing a goaf by chamber and deep hole blasting, which is optimized aiming at a goaf chamber and deep hole blasting method in the patent CN102589372A, and the patent enables a hanging side part of the goaf to move downwards and to be unloaded by a triangular prism, so that the load of the hanging side moving downwards is reduced, and the working efficiency is improved. Meanwhile, a goaf formed after extraction of ore pillars on the lower portion of the construction roadway is filled with pine stones generated by deep hole blasting of the triangular prism and waste stones generated by tunneling of the horizontal construction roadway for deep hole drilling, and therefore hanging wall rock mass and reserved studs are limited from moving towards the goaf; how to determine accurate blasting volume and filling height is not disclosed, so that construction parameters can only be determined by means of numerical simulation in practice, and flaws still exist. It is assumed that the bending moments of the top plate are equal before and after the goaf is treated, accurate blasting construction parameters such as the filling height and the distance from a hanging wall rock drilling construction roadway to the goaf are theoretically derived, and therefore the construction parameters for treating the goaf through the chamber and the deep hole blasting method are accurately designed.
Description
technical field [0001] The invention belongs to the technical field of mining, in particular to a method for accurately treating goafs by chamber and deep hole blasting. Background technique [0002] For medium-thick or thick mining areas with upper ore bodies that need to be protected, a large number of ore pillars left over from the room-and-pillar mining method need to be recovered safely, and goafs must be dealt with to avoid accidents caused by sudden fall or subsidence , but also to avoid pillar recovery and goaf treatment caused by rock movement damage to the upper mine. [0003] In the patent CN102589372A, a chamber and deep hole blasting method of the goaf is disclosed, and the chamber and deep hole blasting method is implemented on the goaf, so that the upper wall of the goaf is moved downward to unload the triangular prism, thereby The load of the hanging wall moving down is reduced, and at the same time, the pine rocks produced by the triangular prism in deep ho...
Claims
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IPC IPC(8): E21F15/00E21C41/22E21B7/04E21D9/00E21D9/10F42D3/00
CPCE21F15/00E21C41/22E21B7/04E21D9/006E21D9/10F42D3/00
Inventor 李俊平王海泉张莉鹏刘先珊段二章苗丁陈伟金文辉李南南雷政可龚益才窦志明刘冬生张华涛黄传宝杨克明李日高
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY