Method for weakening strength of hard rock

A hard rock and strength technology, applied in the field of hard rock strength weakening, can solve the problems of weakening, affecting the driving speed of rock roadway, and wear of cutting parts of fully mechanized excavation equipment

Active Publication Date: 2010-12-22
HUAINAN MINING IND GRP +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for weakening the strength of hard rock, which is used to solve the problem that the cutting parts of the fully-mechanized excavation equipment will be damaged when the fully-mechanized excavation equipment is used to excavate hard rock with a Platts coefficient of 8 or greater than 8 in the prior art. The tech

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  • Method for weakening strength of hard rock
  • Method for weakening strength of hard rock
  • Method for weakening strength of hard rock

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Embodiment Construction

[0016] The technical solutions of the present invention will be further described in detail below through the accompanying drawings and embodiments.

[0017] figure 1 It is a schematic flow diagram of the hard rock strength weakening method of the present invention. Such as figure 1 As shown, the vertical shaft uncovering method of this embodiment includes:

[0018] Step 101: Set a blast hole group along the axis of the hard rock roadway in the tunneling section of the hard rock roadway;

[0019] figure 2 It is a schematic diagram of the rock tunnel section after the blast hole group is set in the hard rock tunnel driving section of the present invention. When the comprehensive excavation equipment encounters hard rocks with a Platts coefficient of 8 or greater in the actual rock tunnel excavation project (the hard rocks involved in this embodiment are all hard rocks with a Platts coefficient of 8 or greater), the construction personnel Firstly, the fully mechanized excavation equ...

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Abstract

The invention discloses a method for weakening strength of hard rock, comprising the following steps: setting blasthole groups along the axial direction of a hard rock tunnel in the tunneling fracture surface; filling explosives in each blasthole of the blasthole groups and sealing the blastholes; setting off explosives in each blasthole in sequence so as to weaken the hard rock strength of tunneling fracture surface of the hard rock tunnel. The method of the invention is designed for addressing the technical defect that in the prior art, when a complex driving device tunnels hard rock with protodyaknove's number reaching or surpassing 8, the cutting part of the complex driving device is likely to be seriously worn, which affects stone drifting speed and weakens strength of hard rock, reduces abrasion of the cutting part of the complex driving device, ensures continuous working of the complex driving device and accelerates stone drifting speed.

Description

Technical field [0001] The invention relates to hard rock strength weakening technology, in particular to a hard rock strength weakening method for reducing the wear of fully mechanized excavating equipment and ensuring continuous operation of fully mechanized excavating equipment, and belongs to the technical field of coal mine engineering. Background technique [0002] Rock tunnel excavation occupies a very important position in coal mine construction and production. Specifically, in the construction of new mines, rock tunnel excavation works generally account for about 40%-50% of the total construction of new mines, and 35%-50% of the entire construction period of new mines; in production mines, rock tunnels The tunneling engineering volume generally accounts for about 25% of the total production engineering volume. Therefore, for the construction of new mines, the speed of rock tunnel excavation can be accelerated, and the rapid construction of rock tunnels can be realized. ...

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Application Information

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IPC IPC(8): F42D3/04F42D1/10
Inventor 章立清涂敏喻希乐付宝杰方恩才黄文尧王传兵温福平
Owner HUAINAN MINING IND GRP
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