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Testing method for simulating induction of adjacent roadway surrounding rock failure in borehole-blasting method construction

An experimental method and technology for roadway construction, applied in the field of roadway blasting and excavation, can solve problems such as dynamic disasters, insufficient damage research, and surrounding rock damage

Inactive Publication Date: 2014-12-17
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Drilling and blasting method is the main construction method of mine and roadway excavation in my country at present, and is widely used in roadway (tunnel, chamber, etc.) Negative impacts, such as the impact of drilling and blasting construction roadways (tunnels, chambers, etc.) Cause damage to the surrounding rock of adjacent roadways (tunnels, chambers, etc.), and even induce dynamic disasters. At present, my country's engineering and technical circles have achieved a lot of research results on the efficient use of blasting loads. Insufficient research, especially laboratory research, this experimental method can provide ideas for such research

Method used

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  • Testing method for simulating induction of adjacent roadway surrounding rock failure in borehole-blasting method construction
  • Testing method for simulating induction of adjacent roadway surrounding rock failure in borehole-blasting method construction
  • Testing method for simulating induction of adjacent roadway surrounding rock failure in borehole-blasting method construction

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Embodiment

[0099] The present invention will be further described in detail below by taking the caustic line method as an example to dynamically collect damage conditions around the simulated roadway.

[0100] 1. model processing

[0101] see Figure 2 to Figure 3 As shown, the test model material is a plexiglass plate with a size of 300mm×300mm×5mm. The arched roadway with straight wall is processed in the middle of the slab, and the lower part of the roadway is 40mm 20mm semi-rectangular, the upper part is a semi-dome with a radius of 20mm.

[0102] Considering the stress concentration area and easy damage points when the roadway is loaded, 7 arc-shaped cracks with different inclination angles are prefabricated at different positions around the roadway. The cracks are composed of two identical arcs. The corresponding chord length of the arc is 2mm, so as to simulate the original defects of the surrounding rock around the roadway. For clear explanation, the cracks are numbered clo...

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Abstract

The invention discloses a testing method for simulating the induction of an adjacent roadway surrounding rock failure in the borehole-blasting method construction, relates to technical field of roadway blasting excavation and overcomes the influence of blasting dynamic loads to an original adjacent roadway surrounding rock crack group so as to enable the safe distance of the adjacent roadway distribution to be determined and provide a basis for the economic and reasonable support of tunnelling a roadway by adopting the borehole-blasting method. The method comprises the following steps: pre-setting a simulation roadway at a local position of a test block; forming pre-set threads on a pre-set position of an outline of the simulation roadway; forming blasting holes in a pre-set position adjacent to the simulation roadway and on the test block, and filling explosives in the blasting holes; dynamically collecting and analyzing the damage conditions of the periphery of the simulation roadway while detonating the explosives so as to obtain data of blasting to dynamic factors of the simulation roadway surrounding rock failure. The method is suitable for simulation tests of the induction of the adjacent roadway surrounding rock failure caused by constructing the roadway by using the borehole-blasting method.

Description

technical field [0001] The invention relates to the technical field of roadway blasting excavation, in particular to an experimental method for simulating the destruction of adjacent roadway surrounding rock induced by drilling and blasting method construction. Background technique [0002] Drilling and blasting method is the main construction method of mine and roadway excavation in China at present, and is widely used in roadway (tunnel, chamber, etc.) Negative impacts, such as the impact of drilling and blasting construction roadways (tunnels, chambers, etc.) Cause damage to the surrounding rock of adjacent roadways (tunnels, chambers, etc.), and even induce dynamic disasters. At present, China's engineering and technical circles have achieved a lot of research results on the efficient use of blasting loads. There is not enough research, especially laboratory research, and this experimental method can provide ideas for such research. Contents of the invention [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
Inventor 郭东明杨仁树刘康
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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